glupteba | c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf

Analysis

max time kernel
150s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
27/04/2024, 08:33

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General

Target

c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Size

4.1MB
MD5

8be25ff8e8a4180c3bc15ac404e60d97
SHA1

434aa9ee5a8dd752c58c0f54a19e90a77bc92d11
SHA256

c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf
SHA512

e29c26d46f02258da304817ed162f7ced0d38b977e36768fe5e2d65245c94415da04da0b7531bf3bf2f7b733fdd969dc9170ce1a2fb202413f8c2b4399bff630
SSDEEP

98304:hBrcvoQ3bpeAYFyI5s2iXAaDVcYvvxcUB482tlsgYA74g:hBQ8JjsJRJcupcUK8wlX77

Score

10^/10

glupteba discovery dropper evasion loader persistence rootkit

Malware Config

Signatures

Glupteba
Glupteba is a modular loader written in Golang with various components.
loader dropper glupteba

Glupteba payload 16 IoCs

resource	yara_rule
behavioral2/memory/3840-2-0x00000000050D0000-0x00000000059BB000-memory.dmp	family_glupteba
behavioral2/memory/3840-3-0x0000000000400000-0x0000000002EDF000-memory.dmp	family_glupteba
behavioral2/memory/3840-50-0x0000000000400000-0x0000000002EDF000-memory.dmp	family_glupteba
behavioral2/memory/3840-52-0x00000000050D0000-0x00000000059BB000-memory.dmp	family_glupteba
behavioral2/memory/1548-76-0x0000000000400000-0x0000000002EDF000-memory.dmp	family_glupteba
behavioral2/memory/1548-127-0x0000000000400000-0x0000000002EDF000-memory.dmp	family_glupteba
behavioral2/memory/2216-150-0x0000000000400000-0x0000000002EDF000-memory.dmp	family_glupteba
behavioral2/memory/2216-154-0x0000000000400000-0x0000000002EDF000-memory.dmp	family_glupteba
behavioral2/memory/2216-208-0x0000000000400000-0x0000000002EDF000-memory.dmp	family_glupteba
behavioral2/memory/2216-211-0x0000000000400000-0x0000000002EDF000-memory.dmp	family_glupteba
behavioral2/memory/2216-214-0x0000000000400000-0x0000000002EDF000-memory.dmp	family_glupteba
behavioral2/memory/2216-217-0x0000000000400000-0x0000000002EDF000-memory.dmp	family_glupteba
behavioral2/memory/2216-220-0x0000000000400000-0x0000000002EDF000-memory.dmp	family_glupteba
behavioral2/memory/2216-223-0x0000000000400000-0x0000000002EDF000-memory.dmp	family_glupteba
behavioral2/memory/2216-226-0x0000000000400000-0x0000000002EDF000-memory.dmp	family_glupteba
behavioral2/memory/2216-229-0x0000000000400000-0x0000000002EDF000-memory.dmp	family_glupteba

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4128	netsh.exe

Executes dropped EXE 2 IoCs

pid	Process
2216	csrss.exe
3704	injector.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-293923083-2364846840-4256557006-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\""	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-293923083-2364846840-4256557006-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\""	csrss.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Manipulates WinMonFS driver. 1 IoCs

Roottkits write to WinMonFS to hide directories/files from being detected.

rootkit evasion

description	ioc	Process
File opened for modification	\??\WinMonFS	csrss.exe

Drops file in System32 directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive	powershell.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive	powershell.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive	powershell.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive	powershell.exe
File created	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive	powershell.exe
File created	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log	powershell.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive	powershell.exe

Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs

Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\VBoxMiniRdrDN	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\rss\csrss.exe	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
File opened for modification	C:\Windows\rss	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
412	schtasks.exe
2116	schtasks.exe

Modifies data under HKEY_USERS 64 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1502 = "Turkey Standard Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-631 = "Tokyo Daylight Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-402 = "Arabic Standard Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-431 = "Iran Daylight Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2591 = "Tocantins Daylight Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-891 = "Morocco Daylight Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1972 = "Belarus Standard Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2161 = "Altai Daylight Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2042 = "Eastern Standard Time (Mexico)"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-232 = "Hawaiian Standard Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2792 = "Novosibirsk Standard Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-491 = "India Daylight Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-742 = "New Zealand Standard Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-3142 = "South Sudan Standard Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-302 = "Romance Standard Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-122 = "SA Pacific Standard Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2321 = "Sakhalin Daylight Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2411 = "Marquesas Daylight Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	powershell.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-3141 = "South Sudan Daylight Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-365 = "Middle East Standard Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-212 = "Pacific Standard Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-132 = "US Eastern Standard Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-352 = "FLE Standard Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-872 = "Pakistan Standard Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1911 = "Russia TZ 10 Daylight Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-104 = "Central Brazilian Daylight Time"	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4268	powershell.exe
4268	powershell.exe
3840	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
3840	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
4736	powershell.exe
4736	powershell.exe
1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
3560	powershell.exe
3560	powershell.exe
3556	powershell.exe
3556	powershell.exe
1684	powershell.exe
1684	powershell.exe
1312	powershell.exe
1312	powershell.exe
3808	powershell.exe
3808	powershell.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
2216	csrss.exe
2216	csrss.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
2216	csrss.exe
2216	csrss.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe
3704	injector.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

description	pid	Process
Token: SeDebugPrivilege	4268	powershell.exe
Token: SeDebugPrivilege	3840	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Token: SeImpersonatePrivilege	3840	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
Token: SeDebugPrivilege	4736	powershell.exe
Token: SeDebugPrivilege	3560	powershell.exe
Token: SeDebugPrivilege	3556	powershell.exe
Token: SeDebugPrivilege	1684	powershell.exe
Token: SeDebugPrivilege	1312	powershell.exe
Token: SeDebugPrivilege	3808	powershell.exe
Token: SeSystemEnvironmentPrivilege	2216	csrss.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3840 wrote to memory of 4268	3840	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe	81
PID 3840 wrote to memory of 4268	3840	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe	81
PID 3840 wrote to memory of 4268	3840	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe	81
PID 1548 wrote to memory of 4736	1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe	86
PID 1548 wrote to memory of 4736	1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe	86
PID 1548 wrote to memory of 4736	1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe	86
PID 1548 wrote to memory of 2476	1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe	88
PID 1548 wrote to memory of 2476	1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe	88
PID 2476 wrote to memory of 4128	2476	cmd.exe	90
PID 2476 wrote to memory of 4128	2476	cmd.exe	90
PID 1548 wrote to memory of 3560	1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe	91
PID 1548 wrote to memory of 3560	1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe	91
PID 1548 wrote to memory of 3560	1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe	91
PID 1548 wrote to memory of 3556	1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe	93
PID 1548 wrote to memory of 3556	1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe	93
PID 1548 wrote to memory of 3556	1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe	93
PID 1548 wrote to memory of 2216	1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe	95
PID 1548 wrote to memory of 2216	1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe	95
PID 1548 wrote to memory of 2216	1548	c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe	95
PID 2216 wrote to memory of 1684	2216	csrss.exe	96
PID 2216 wrote to memory of 1684	2216	csrss.exe	96
PID 2216 wrote to memory of 1684	2216	csrss.exe	96
PID 2216 wrote to memory of 1312	2216	csrss.exe	102
PID 2216 wrote to memory of 1312	2216	csrss.exe	102
PID 2216 wrote to memory of 1312	2216	csrss.exe	102
PID 2216 wrote to memory of 3808	2216	csrss.exe	104
PID 2216 wrote to memory of 3808	2216	csrss.exe	104
PID 2216 wrote to memory of 3808	2216	csrss.exe	104
PID 2216 wrote to memory of 3704	2216	csrss.exe	106
PID 2216 wrote to memory of 3704	2216	csrss.exe	106

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
"C:\Users\Admin\AppData\Local\Temp\c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3840
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell -nologo -noprofile
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4268
- C:\Users\Admin\AppData\Local\Temp\c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe
  "C:\Users\Admin\AppData\Local\Temp\c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf.exe"
  2⤵
  - Adds Run key to start application
  - Checks for VirtualBox DLLs, possible anti-VM trick
  - Drops file in Windows directory
  - Modifies data under HKEY_USERS
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1548
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -nologo -noprofile
    3⤵
    - Drops file in System32 directory
    - Modifies data under HKEY_USERS
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4736
- - C:\Windows\system32\cmd.exe
    C:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2476
  - - C:\Windows\system32\netsh.exe
      netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes
      4⤵
      Modifies Windows Firewall
      PID:4128
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -nologo -noprofile
    3⤵
    - Drops file in System32 directory
    - Modifies data under HKEY_USERS
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3560
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -nologo -noprofile
    3⤵
    - Drops file in System32 directory
    - Modifies data under HKEY_USERS
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3556
- - C:\Windows\rss\csrss.exe
    C:\Windows\rss\csrss.exe
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Manipulates WinMonFS driver.
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2216
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -nologo -noprofile
      4⤵
      Drops file in System32 directory
      Modifies data under HKEY_USERS
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1684
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F
      4⤵
      Creates scheduled task(s)
      PID:412
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /delete /tn ScheduledUpdate /f
      4⤵
      PID:4432
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -nologo -noprofile
      4⤵
      Drops file in System32 directory
      Modifies data under HKEY_USERS
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1312
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -nologo -noprofile
      4⤵
      Drops file in System32 directory
      Modifies data under HKEY_USERS
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3808
  - - C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
      C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe taskmgr.exe C:\Users\Admin\AppData\Local\Temp\csrss\injector\NtQuerySystemInformationHook.dll
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:3704
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F
      4⤵
      Creates scheduled task(s)
      PID:2116

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

T1053

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qacorckj.n1v.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe

Filesize
281KB

MD5
d98e33b66343e7c96158444127a117f6

SHA1
bb716c5509a2bf345c6c1152f6e3e1452d39d50d

SHA256
5de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1

SHA512
705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5

Download Submit
C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d0c46cad6c0778401e21910bd6b56b70

SHA1
7be418951ea96326aca445b8dfe449b2bfa0dca6

SHA256
9600b3fdf0565ccb49e21656aa4b24d7c18f776bfd04d9ee984b134707550f02

SHA512
057531b468f7fbbb2175a696a8aab274dec0d17d9f71df309edcff35e064f3378050066a3df47ccd03048fac461594ec75e3d4fe64f9dd79949d129f51e02949

Download Submit
C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive

Filesize
19KB

MD5
4610a9e05b4d151b202dc62c3b4e9800

SHA1
c3939fbe571527c344f56155bda44831db5cdcfe

SHA256
bc683c0d9ec5606a278210311c1392895dbb19b253503761243d56d1ac9f567a

SHA512
de45024c3af35afb54310b1b8f31b93806579dc1d52b3d93aeac3e96594268919e204105a6a660c0b5f48a8902ef743bb2b6b59e9602dec7176bf2e7de0fea35

Download Submit
C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive

Filesize
19KB

MD5
8307ec29ef0a7331c5944bb8de49dc23

SHA1
dfd528186eab856064698404255b30d8f7d54432

SHA256
6ae2614a75dfadfc44b0046ed56598b7ad5cf95c55b4da5249828b767327d445

SHA512
2072c815d667ad1830df8c4c285a1ce9b171602b90e04d14075967c9f75fa128131aa5ca150c1c410e8b868b707489b02e0ba690053524798cb0b758716835a3

Download Submit
C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive

Filesize
19KB

MD5
ad4802e5b637a4076683a22b1660f78f

SHA1
434f33d785ff9c0a5ad8b15b6012f267a3e1149b

SHA256
5d1536ada314d78174ed7eac2c514e22362f644716bac2a2eea19aa3fc3eed0d

SHA512
66f9bd9af58231c5ada461fdef95f647677a833bb836cee0e33aa3192dd79d2a23b64fc6a587f2b7fb7ce5d4aea7bc53e6f2a9bf2e530b2ec8f71c90a3f2005f

Download Submit
C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive

Filesize
19KB

MD5
5c47378e4ea820fbbcf85fcfd50f3a7d

SHA1
b8c8d168cc039fd042cb9cf1da34bc0ff5717b46

SHA256
cc12f487f924822efba10d875104754663b00093ccea6f72017b8561efce3882

SHA512
00611afc0acc3a7a14ab67e473e078eac8026d5328fcbab65682b0c3a05a8ef15902f129254e86bb49eae6b5a2665aca1cf847ca959e2832c6f05ceaae51aab6

Download Submit
C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive

Filesize
19KB

MD5
cf9047f1439bbdbf25a66392012d974c

SHA1
b85a6e9076ef65fc1a8caad8a5c7d56ce762e566

SHA256
4a088d4174729e1506d73b864f1bbe92b795d7f127cbcc5bb998f2e886239702

SHA512
6d97fcec607cc0a628d28255858cc8568da7bbf9d5980eb5555e3e72f1c041009798af08b22c2df34ae39366701e59282b5909adf88043db0856a57ff954b96b

Download Submit
C:\Windows\rss\csrss.exe

Filesize
4.1MB

MD5
8be25ff8e8a4180c3bc15ac404e60d97

SHA1
434aa9ee5a8dd752c58c0f54a19e90a77bc92d11

SHA256
c7fe98bb6f23ea13f7a259dffe5cd6b98a79c7236a76fbdd277012c979c855bf

SHA512
e29c26d46f02258da304817ed162f7ced0d38b977e36768fe5e2d65245c94415da04da0b7531bf3bf2f7b733fdd969dc9170ce1a2fb202413f8c2b4399bff630

Download Submit
memory/1312-176-0x0000000007A00000-0x0000000007AA4000-memory.dmp

Filesize
656KB

Download
memory/1312-178-0x0000000006210000-0x0000000006225000-memory.dmp

Filesize
84KB

Download
memory/1312-163-0x00000000063B0000-0x0000000006707000-memory.dmp

Filesize
3.3MB

Download
memory/1312-165-0x0000000006D60000-0x0000000006DAC000-memory.dmp

Filesize
304KB

Download
memory/1312-167-0x0000000070CA0000-0x0000000070FF7000-memory.dmp

Filesize
3.3MB

Download
memory/1312-166-0x0000000070B20000-0x0000000070B6C000-memory.dmp

Filesize
304KB

Download
memory/1312-177-0x00000000061D0000-0x00000000061E1000-memory.dmp

Filesize
68KB

Download
memory/1548-127-0x0000000000400000-0x0000000002EDF000-memory.dmp

Filesize
42.9MB

Download
memory/1548-76-0x0000000000400000-0x0000000002EDF000-memory.dmp

Filesize
42.9MB

Download
memory/1684-141-0x0000000070E50000-0x00000000711A7000-memory.dmp

Filesize
3.3MB

Download
memory/1684-140-0x0000000070C00000-0x0000000070C4C000-memory.dmp

Filesize
304KB

Download
memory/2216-214-0x0000000000400000-0x0000000002EDF000-memory.dmp

Filesize
42.9MB

Download
memory/2216-223-0x0000000000400000-0x0000000002EDF000-memory.dmp

Filesize
42.9MB

Download
memory/2216-217-0x0000000000400000-0x0000000002EDF000-memory.dmp

Filesize
42.9MB

Download
memory/2216-229-0x0000000000400000-0x0000000002EDF000-memory.dmp

Filesize
42.9MB

Download
memory/2216-211-0x0000000000400000-0x0000000002EDF000-memory.dmp

Filesize
42.9MB

Download
memory/2216-220-0x0000000000400000-0x0000000002EDF000-memory.dmp

Filesize
42.9MB

Download
memory/2216-154-0x0000000000400000-0x0000000002EDF000-memory.dmp

Filesize
42.9MB

Download
memory/2216-150-0x0000000000400000-0x0000000002EDF000-memory.dmp

Filesize
42.9MB

Download
memory/2216-226-0x0000000000400000-0x0000000002EDF000-memory.dmp

Filesize
42.9MB

Download
memory/2216-208-0x0000000000400000-0x0000000002EDF000-memory.dmp

Filesize
42.9MB

Download
memory/3556-111-0x0000000070C00000-0x0000000070C4C000-memory.dmp

Filesize
304KB

Download
memory/3556-112-0x0000000070D80000-0x00000000710D7000-memory.dmp

Filesize
3.3MB

Download
memory/3560-90-0x0000000070C00000-0x0000000070C4C000-memory.dmp

Filesize
304KB

Download
memory/3560-91-0x0000000070D80000-0x00000000710D7000-memory.dmp

Filesize
3.3MB

Download
memory/3560-88-0x0000000005A60000-0x0000000005DB7000-memory.dmp

Filesize
3.3MB

Download
memory/3808-192-0x0000000070D70000-0x00000000710C7000-memory.dmp

Filesize
3.3MB

Download
memory/3808-191-0x0000000070B20000-0x0000000070B6C000-memory.dmp

Filesize
304KB

Download
memory/3808-181-0x0000000005A30000-0x0000000005D87000-memory.dmp

Filesize
3.3MB

Download
memory/3840-52-0x00000000050D0000-0x00000000059BB000-memory.dmp

Filesize
8.9MB

Download
memory/3840-1-0x0000000003520000-0x0000000003921000-memory.dmp

Filesize
4.0MB

Download
memory/3840-51-0x0000000003520000-0x0000000003921000-memory.dmp

Filesize
4.0MB

Download
memory/3840-50-0x0000000000400000-0x0000000002EDF000-memory.dmp

Filesize
42.9MB

Download
memory/3840-3-0x0000000000400000-0x0000000002EDF000-memory.dmp

Filesize
42.9MB

Download
memory/3840-2-0x00000000050D0000-0x00000000059BB000-memory.dmp

Filesize
8.9MB

Download
memory/4268-25-0x0000000070C00000-0x0000000070C4C000-memory.dmp

Filesize
304KB

Download
memory/4268-24-0x0000000007790000-0x00000000077C4000-memory.dmp

Filesize
208KB

Download
memory/4268-4-0x0000000004EC0000-0x0000000004EF6000-memory.dmp

Filesize
216KB

Download
memory/4268-6-0x0000000005010000-0x0000000005020000-memory.dmp

Filesize
64KB

Download
memory/4268-5-0x0000000074990000-0x0000000075141000-memory.dmp

Filesize
7.7MB

Download
memory/4268-8-0x0000000005650000-0x0000000005C7A000-memory.dmp

Filesize
6.2MB

Download
memory/4268-7-0x0000000005010000-0x0000000005020000-memory.dmp

Filesize
64KB

Download
memory/4268-48-0x0000000074990000-0x0000000075141000-memory.dmp

Filesize
7.7MB

Download
memory/4268-45-0x0000000007A70000-0x0000000007A78000-memory.dmp

Filesize
32KB

Download
memory/4268-44-0x0000000007A50000-0x0000000007A6A000-memory.dmp

Filesize
104KB

Download
memory/4268-43-0x0000000007A00000-0x0000000007A15000-memory.dmp

Filesize
84KB

Download
memory/4268-42-0x00000000079F0000-0x00000000079FE000-memory.dmp

Filesize
56KB

Download
memory/4268-41-0x00000000079A0000-0x00000000079B1000-memory.dmp

Filesize
68KB

Download
memory/4268-40-0x0000000007A90000-0x0000000007B26000-memory.dmp

Filesize
600KB

Download
memory/4268-39-0x0000000007980000-0x000000000798A000-memory.dmp

Filesize
40KB

Download
memory/4268-37-0x0000000007F80000-0x00000000085FA000-memory.dmp

Filesize
6.5MB

Download
memory/4268-38-0x0000000007940000-0x000000000795A000-memory.dmp

Filesize
104KB

Download
memory/4268-9-0x00000000055D0000-0x00000000055F2000-memory.dmp

Filesize
136KB

Download
memory/4268-26-0x0000000070DD0000-0x0000000071127000-memory.dmp

Filesize
3.3MB

Download
memory/4268-35-0x00000000077F0000-0x000000000780E000-memory.dmp

Filesize
120KB

Download
memory/4268-36-0x0000000007810000-0x00000000078B4000-memory.dmp

Filesize
656KB

Download
memory/4268-23-0x0000000006920000-0x0000000006966000-memory.dmp

Filesize
280KB

Download
memory/4268-22-0x00000000063A0000-0x00000000063EC000-memory.dmp

Filesize
304KB

Download
memory/4268-21-0x0000000006380000-0x000000000639E000-memory.dmp

Filesize
120KB

Download
memory/4268-20-0x0000000005F00000-0x0000000006257000-memory.dmp

Filesize
3.3MB

Download
memory/4268-11-0x0000000005E90000-0x0000000005EF6000-memory.dmp

Filesize
408KB

Download
memory/4268-10-0x0000000005DB0000-0x0000000005E16000-memory.dmp

Filesize
408KB

Download
memory/4736-75-0x0000000007BF0000-0x0000000007C05000-memory.dmp

Filesize
84KB

Download
memory/4736-62-0x0000000006120000-0x0000000006477000-memory.dmp

Filesize
3.3MB

Download
memory/4736-63-0x0000000070C00000-0x0000000070C4C000-memory.dmp

Filesize
304KB

Download
memory/4736-64-0x0000000070E50000-0x00000000711A7000-memory.dmp

Filesize
3.3MB

Download
memory/4736-73-0x0000000007880000-0x0000000007924000-memory.dmp

Filesize
656KB

Download
memory/4736-74-0x0000000007BA0000-0x0000000007BB1000-memory.dmp

Filesize
68KB

Download