glupteba | 620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f

Analysis

max time kernel
149s
max time network
121s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
26/04/2024, 15:31

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General

Target
620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Size 4.2MB
Sample240426-syb3wsfd7s
SHA256 620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f
MD5 bdc26874d8f03d5338927112ca28002d
SHA1 ea0a0255ff3486c57774a1c034d44f0d7b40b643
SHA512 af8e599711ac44d95023d2ee78adb3a50aca05ffab07db4e508f1d923b8f6fde18ddf89617b3820b0cabd95e97e4d2c86129c4c2304e197eb4c3b074cd94f487
SSDEEP 98304:PGzsnCxKltbFvS+Z1vjUEQC5FD5MQIQIIS4sbbL4w:PG4nxAoLumFD5/IIFsL
MD5 SHA1 SHA512 SSDEEP

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 19 IoCs

resource	yara_rule
behavioral2/memory/4292-2-0x0000000006520000-0x0000000006E0B000-memory.dmp	family_glupteba
behavioral2/memory/4292-3-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/4292-51-0x0000000006520000-0x0000000006E0B000-memory.dmp	family_glupteba
behavioral2/memory/4292-50-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/1968-120-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/1968-126-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/4564-152-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/4564-177-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/4564-204-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/4564-205-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/4564-206-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/4564-207-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/4564-208-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/4564-209-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/4564-210-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/4564-211-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/4564-212-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/4564-213-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/4564-214-0x0000000000400000-0x0000000004420000-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
1064	netsh.exe

Executes dropped EXE 2 IoCs

pid	Process
4564	csrss.exe
3300	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-1-5-21-734199974-1358367239-436541239-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\""	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-734199974-1358367239-436541239-1000\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 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
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	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\rss	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
File created	C:\Windows\rss\csrss.exe	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4952	4292	WerFault.exe	78
1424	1968	WerFault.exe	85

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
4872	schtasks.exe
1144	schtasks.exe

Modifies data under HKEY_USERS 64 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	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,-2392 = "Aleutian Standard Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1972 = "Belarus Standard Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1471 = "Magadan Daylight Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-3052 = "Qyzylorda Standard Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-391 = "Arab Daylight Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2371 = "Easter Island Daylight Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2572 = "Turks and Caicos Standard Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	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,-602 = "Taipei Standard Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2142 = "Transbaikal Standard Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2612 = "Bougainville Standard Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-342 = "Egypt Standard Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2632 = "Norfolk Standard Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-331 = "E. Europe Daylight Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	powershell.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2512 = "Lord Howe Standard Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1831 = "Russia TZ 2 Daylight Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2451 = "Saint Pierre Daylight Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-3051 = "Qyzylorda Daylight Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs	powershell.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2611 = "Bougainville Daylight Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-911 = "Mauritius Daylight Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1862 = "Russia TZ 6 Standard Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1842 = "Russia TZ 4 Standard Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-362 = "GTB Standard Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-91 = "Pacific SA Daylight Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-492 = "India Standard Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-692 = "Tasmania Standard Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-212 = "Pacific Standard Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-872 = "Pakistan Standard Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-651 = "AUS Central Daylight Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-511 = "Central Asia Daylight Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	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,-104 = "Central Brazilian Daylight Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-491 = "India Daylight Time"	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2136	powershell.exe
2136	powershell.exe
4292	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
4292	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
3832	powershell.exe
3832	powershell.exe
1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
2532	powershell.exe
2532	powershell.exe
4036	powershell.exe
4036	powershell.exe
2912	powershell.exe
2912	powershell.exe
3364	powershell.exe
3364	powershell.exe
2932	powershell.exe
2932	powershell.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
4564	csrss.exe
4564	csrss.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
4564	csrss.exe
4564	csrss.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe
3300	injector.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

description	pid	Process
Token: SeDebugPrivilege	2136	powershell.exe
Token: SeDebugPrivilege	4292	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Token: SeImpersonatePrivilege	4292	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
Token: SeDebugPrivilege	3832	powershell.exe
Token: SeDebugPrivilege	2532	powershell.exe
Token: SeDebugPrivilege	4036	powershell.exe
Token: SeDebugPrivilege	2912	powershell.exe
Token: SeDebugPrivilege	3364	powershell.exe
Token: SeDebugPrivilege	2932	powershell.exe
Token: SeSystemEnvironmentPrivilege	4564	csrss.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 4292 wrote to memory of 2136	4292	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe	80
PID 4292 wrote to memory of 2136	4292	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe	80
PID 4292 wrote to memory of 2136	4292	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe	80
PID 1968 wrote to memory of 3832	1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe	89
PID 1968 wrote to memory of 3832	1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe	89
PID 1968 wrote to memory of 3832	1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe	89
PID 1968 wrote to memory of 3808	1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe	91
PID 1968 wrote to memory of 3808	1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe	91
PID 3808 wrote to memory of 1064	3808	cmd.exe	93
PID 3808 wrote to memory of 1064	3808	cmd.exe	93
PID 1968 wrote to memory of 2532	1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe	94
PID 1968 wrote to memory of 2532	1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe	94
PID 1968 wrote to memory of 2532	1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe	94
PID 1968 wrote to memory of 4036	1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe	96
PID 1968 wrote to memory of 4036	1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe	96
PID 1968 wrote to memory of 4036	1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe	96
PID 1968 wrote to memory of 4564	1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe	98
PID 1968 wrote to memory of 4564	1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe	98
PID 1968 wrote to memory of 4564	1968	620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe	98
PID 4564 wrote to memory of 2912	4564	csrss.exe	101
PID 4564 wrote to memory of 2912	4564	csrss.exe	101
PID 4564 wrote to memory of 2912	4564	csrss.exe	101
PID 4564 wrote to memory of 3364	4564	csrss.exe	106
PID 4564 wrote to memory of 3364	4564	csrss.exe	106
PID 4564 wrote to memory of 3364	4564	csrss.exe	106
PID 4564 wrote to memory of 2932	4564	csrss.exe	109
PID 4564 wrote to memory of 2932	4564	csrss.exe	109
PID 4564 wrote to memory of 2932	4564	csrss.exe	109
PID 4564 wrote to memory of 3300	4564	csrss.exe	111
PID 4564 wrote to memory of 3300	4564	csrss.exe	111

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\620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
"C:\Users\Admin\AppData\Local\Temp\620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4292
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell -nologo -noprofile
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2136
- C:\Users\Admin\AppData\Local\Temp\620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.exe
  "C:\Users\Admin\AppData\Local\Temp\620c01b81ecd480ebdd9d48411697228466acda6a47226088602787443c6fe2f.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:1968
- - 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:3832
- - 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:3808
  - - 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:1064
- - 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:2532
- - 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:4036
- - 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:4564
  - - 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:2912
  - - 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:4872
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /delete /tn ScheduledUpdate /f
      4⤵
      PID:3092
  - - 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:3364
  - - 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:2932
  - - 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:3300
  - - 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:1144
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1968 -s 824
    3⤵
    - Program crash
    PID:1424
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4292 -s 932
  2⤵
  - Program crash
  PID:4952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4292 -ip 4292
1⤵
PID:3276

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 1968 -ip 1968
1⤵
PID:3412

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

__PSScriptPolicyTest_2zrdxqam.2fk.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2zrdxqam.2fk.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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injector.exe

Path C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
Size 281KB
SHA256 5de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1
MD5 d98e33b66343e7c96158444127a117f6
SHA1 bb716c5509a2bf345c6c1152f6e3e1452d39d50d
SHA512 705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5
SSDEEP 3072:qbHszDaOJ8u2HHFIWr6e29kOnK7qFQ8wMii5I7kGvNjzMuszHshoY46bEydJ+dK9:SA3IlIA6e29vngqS8wMmuooh8z+8F
MD5 SHA1 SHA512 SSDEEP

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powershell.exe.log

Path C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
Size 2KB
SHA256 e39062a62c3c7617feeeff95ea8a0be51104a0d36f46e44eea22556fda74d8d9
MD5 ac4917a885cf6050b1a483e4bc4d2ea5
SHA1 b1c0a9f27bd21c6bbb8e9be70db8777b4a2a640f
SHA512 092c67a3ecae1d187cad72a8ea1ea37cb78a0cf79c2cd7fb88953e5990669a2e871267015762fd46d274badb88ac0c1d73b00f1df7394d89bed48a3a45c2ba3d
MD5 SHA1 SHA512

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