glupteba | b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75

Analysis

max time kernel
149s
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
26/04/2024, 17:43

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General

Target
b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Size 4.2MB
Sample240426-wal5qshe91
SHA256 b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75
MD5 45c4edd9f8f87fe9bbb513806500dcbc
SHA1 8d55f9d2bf8f191354e14ad9581f2a69bd713fd5
SHA512 57e582223ea0d39fa4a11521997d4475cff61529c34d0a79069cefcd3c6b3e89202c77b821ecc24333eb3b2d1cded6926006f07b6366b5d7aab0772d0c61c745
SSDEEP 49152:ECifvx7B+7FOLxQ63IeExjZRrV5rQg00XFP5L9XkQs+hWJEWJawvScCFBuiQf8KX:ECk8+Qet2rTQI1P5Je65g2FBuWsCvPbi
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 18 IoCs

resource	yara_rule
behavioral2/memory/4184-2-0x0000000006520000-0x0000000006E0B000-memory.dmp	family_glupteba
behavioral2/memory/4184-3-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/4184-51-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/4184-52-0x0000000006520000-0x0000000006E0B000-memory.dmp	family_glupteba
behavioral2/memory/3400-126-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/1720-152-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/1720-197-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/1720-204-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/1720-205-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/1720-206-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/1720-207-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/1720-208-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/1720-209-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/1720-210-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/1720-211-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/1720-212-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/1720-213-0x0000000000400000-0x0000000004420000-memory.dmp	family_glupteba
behavioral2/memory/1720-214-0x0000000000400000-0x0000000004420000-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
1992	netsh.exe

Executes dropped EXE 2 IoCs

pid	Process
1720	csrss.exe
1592	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-1-5-21-2878097196-921257239-309638238-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\""	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2878097196-921257239-309638238-1000\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 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
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

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	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\rss	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
File created	C:\Windows\rss\csrss.exe	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1892	4184	WerFault.exe	78
5100	3400	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
1664	schtasks.exe
2608	schtasks.exe

Modifies data under HKEY_USERS 64 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-722 = "Central Pacific Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-572 = "China Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2591 = "Tocantins Daylight Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-332 = "E. Europe Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-931 = "Coordinated Universal Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	powershell.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,-1972 = "Belarus Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-352 = "FLE Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1501 = "Turkey Daylight Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-11 = "Azores Daylight Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-912 = "Mauritius Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	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\AutoDetect = "0"	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1912 = "Russia TZ 10 Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.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,-448 = "Azerbaijan Daylight Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-331 = "E. Europe Daylight Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1841 = "Russia TZ 4 Daylight Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-351 = "FLE Daylight Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1022 = "Bangladesh Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	powershell.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-392 = "Arab Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-81 = "Atlantic Daylight Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-3052 = "Qyzylorda Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-121 = "SA Pacific Daylight Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-131 = "US Eastern Daylight Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-591 = "Malay Peninsula Daylight Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.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,-2062 = "North Korea Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	powershell.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,-441 = "Arabian Daylight Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-452 = "Caucasus Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-261 = "GMT Daylight Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-502 = "Nepal Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	powershell.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,-2532 = "Chatham Islands Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-372 = "Jerusalem Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-981 = "Kamchatka Daylight Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.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,-2162 = "Altai Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-262 = "GMT Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-492 = "India Standard Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-531 = "Sri Lanka Daylight Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2891 = "Sudan Daylight Time"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-172 = "Central Standard Time (Mexico)"	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	powershell.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2076	powershell.exe
2076	powershell.exe
4184	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
4184	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
4792	powershell.exe
4792	powershell.exe
3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
5032	powershell.exe
5032	powershell.exe
1900	powershell.exe
1900	powershell.exe
1224	powershell.exe
1224	powershell.exe
2720	powershell.exe
2720	powershell.exe
4584	powershell.exe
4584	powershell.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1720	csrss.exe
1720	csrss.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1720	csrss.exe
1720	csrss.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe
1592	injector.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

description	pid	Process
Token: SeDebugPrivilege	2076	powershell.exe
Token: SeDebugPrivilege	4184	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Token: SeImpersonatePrivilege	4184	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
Token: SeDebugPrivilege	4792	powershell.exe
Token: SeDebugPrivilege	5032	powershell.exe
Token: SeDebugPrivilege	1900	powershell.exe
Token: SeDebugPrivilege	1224	powershell.exe
Token: SeDebugPrivilege	2720	powershell.exe
Token: SeDebugPrivilege	4584	powershell.exe
Token: SeSystemEnvironmentPrivilege	1720	csrss.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 4184 wrote to memory of 2076	4184	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe	80
PID 4184 wrote to memory of 2076	4184	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe	80
PID 4184 wrote to memory of 2076	4184	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe	80
PID 3400 wrote to memory of 4792	3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe	89
PID 3400 wrote to memory of 4792	3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe	89
PID 3400 wrote to memory of 4792	3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe	89
PID 3400 wrote to memory of 3204	3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe	91
PID 3400 wrote to memory of 3204	3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe	91
PID 3204 wrote to memory of 1992	3204	cmd.exe	93
PID 3204 wrote to memory of 1992	3204	cmd.exe	93
PID 3400 wrote to memory of 5032	3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe	94
PID 3400 wrote to memory of 5032	3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe	94
PID 3400 wrote to memory of 5032	3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe	94
PID 3400 wrote to memory of 1900	3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe	96
PID 3400 wrote to memory of 1900	3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe	96
PID 3400 wrote to memory of 1900	3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe	96
PID 3400 wrote to memory of 1720	3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe	98
PID 3400 wrote to memory of 1720	3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe	98
PID 3400 wrote to memory of 1720	3400	b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe	98
PID 1720 wrote to memory of 1224	1720	csrss.exe	101
PID 1720 wrote to memory of 1224	1720	csrss.exe	101
PID 1720 wrote to memory of 1224	1720	csrss.exe	101
PID 1720 wrote to memory of 2720	1720	csrss.exe	107
PID 1720 wrote to memory of 2720	1720	csrss.exe	107
PID 1720 wrote to memory of 2720	1720	csrss.exe	107
PID 1720 wrote to memory of 4584	1720	csrss.exe	109
PID 1720 wrote to memory of 4584	1720	csrss.exe	109
PID 1720 wrote to memory of 4584	1720	csrss.exe	109
PID 1720 wrote to memory of 1592	1720	csrss.exe	111
PID 1720 wrote to memory of 1592	1720	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\b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
"C:\Users\Admin\AppData\Local\Temp\b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4184
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell -nologo -noprofile
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2076
- C:\Users\Admin\AppData\Local\Temp\b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.exe
  "C:\Users\Admin\AppData\Local\Temp\b9cfd0788ad68ee0a8f76595aa1f250398fc5eb1aefac03d18f558c510a08d75.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:3400
- - 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:4792
- - 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:3204
  - - 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:1992
- - 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:5032
- - 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:1900
- - 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:1720
  - - 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:1224
  - - 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:2608
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /delete /tn ScheduledUpdate /f
      4⤵
      PID:2736
  - - 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:2720
  - - 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:4584
  - - 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:1592
  - - 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:1664
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3400 -s 828
    3⤵
    - Program crash
    PID:5100
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4184 -s 672
  2⤵
  - Program crash
  PID:1892

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4184 -ip 4184
1⤵
PID:432

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 20 -p 3400 -ip 3400
1⤵
PID:2580

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_kyhmnbqa.uz2.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kyhmnbqa.uz2.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 9600b3fdf0565ccb49e21656aa4b24d7c18f776bfd04d9ee984b134707550f02
MD5 d0c46cad6c0778401e21910bd6b56b70
SHA1 7be418951ea96326aca445b8dfe449b2bfa0dca6
SHA512 057531b468f7fbbb2175a696a8aab274dec0d17d9f71df309edcff35e064f3378050066a3df47ccd03048fac461594ec75e3d4fe64f9dd79949d129f51e02949
MD5 SHA1 SHA512

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