glupteba | 1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33

Analysis

max time kernel
149s
max time network
156s
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, 10:25

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Size 4.2MB
Sample240426-mf1ewaed85
SHA256 1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33
MD5 9a469c19bbb28991b01335245589ba57
SHA1 72e1673fc36700c57fb0dd0174eeed428b0e35e2
SHA512 e2adcf8c8efd8452dac1a39467ff6c5f43aa1635990a9fa5bbd0b6701322e22063a746f7c68acaf3fe29b55fc492921c022cf321ac9407e37266510285d9a3f6
SSDEEP 98304:M6zvtQMeZsUGIR23f1Eux2obklXG3eVEjYIcqQcAIgt+uXW47hQYXqeT8:Mj8IR23fmux21lXG3eYYIcTKsXWmQYXm
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 17 IoCs

resource	yara_rule
behavioral2/memory/4936-2-0x0000000006520000-0x0000000006E0B000-memory.dmp	family_glupteba
behavioral2/memory/4936-3-0x0000000000400000-0x000000000441F000-memory.dmp	family_glupteba
behavioral2/memory/4936-71-0x0000000000400000-0x000000000441F000-memory.dmp	family_glupteba
behavioral2/memory/4936-132-0x0000000006520000-0x0000000006E0B000-memory.dmp	family_glupteba
behavioral2/memory/464-130-0x0000000000400000-0x000000000441F000-memory.dmp	family_glupteba
behavioral2/memory/3004-147-0x0000000000400000-0x000000000441F000-memory.dmp	family_glupteba
behavioral2/memory/3004-195-0x0000000000400000-0x000000000441F000-memory.dmp	family_glupteba
behavioral2/memory/3004-204-0x0000000000400000-0x000000000441F000-memory.dmp	family_glupteba
behavioral2/memory/3004-207-0x0000000000400000-0x000000000441F000-memory.dmp	family_glupteba
behavioral2/memory/3004-210-0x0000000000400000-0x000000000441F000-memory.dmp	family_glupteba
behavioral2/memory/3004-213-0x0000000000400000-0x000000000441F000-memory.dmp	family_glupteba
behavioral2/memory/3004-216-0x0000000000400000-0x000000000441F000-memory.dmp	family_glupteba
behavioral2/memory/3004-219-0x0000000000400000-0x000000000441F000-memory.dmp	family_glupteba
behavioral2/memory/3004-222-0x0000000000400000-0x000000000441F000-memory.dmp	family_glupteba
behavioral2/memory/3004-225-0x0000000000400000-0x000000000441F000-memory.dmp	family_glupteba
behavioral2/memory/3004-228-0x0000000000400000-0x000000000441F000-memory.dmp	family_glupteba
behavioral2/memory/3004-231-0x0000000000400000-0x000000000441F000-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
3924	netsh.exe

Executes dropped EXE 2 IoCs

pid	Process
3004	csrss.exe
4560	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\""	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.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

Legitimate hosting services abused for malware hosting/C2 1 TTPs 1 IoCs

Web Service

T1102

flow	ioc
20	raw.githubusercontent.com

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	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\rss	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
File created	C:\Windows\rss\csrss.exe	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.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
4836	schtasks.exe
2192	schtasks.exe

Modifies data under HKEY_USERS 64 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-602 = "Taipei Standard Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	powershell.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
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,-892 = "Morocco Standard Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	powershell.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,-1911 = "Russia TZ 10 Daylight Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	powershell.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\Root\CTLs	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,-751 = "Tonga Daylight Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	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,-1022 = "Bangladesh Standard Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-161 = "Central Daylight Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2451 = "Saint Pierre Daylight Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-462 = "Afghanistan Standard Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-561 = "SE Asia Daylight Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.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,-122 = "SA Pacific Standard Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	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,-92 = "Pacific SA Standard Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-202 = "US Mountain Standard Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1871 = "Russia TZ 7 Daylight Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-962 = "Paraguay Standard Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	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,-434 = "Georgian Daylight Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2411 = "Marquesas Daylight Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-365 = "Middle East Standard Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	powershell.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-452 = "Caucasus Standard Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-242 = "Samoa Standard Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.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,-211 = "Pacific Daylight Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	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,-572 = "China Standard Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	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,-1822 = "Russia TZ 1 Standard Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	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,-2531 = "Chatham Islands Daylight Time"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	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,-171 = "Central Daylight Time (Mexico)"	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2600	powershell.exe
2600	powershell.exe
4936	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
4936	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
1088	powershell.exe
1088	powershell.exe
464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
1380	powershell.exe
1380	powershell.exe
4024	powershell.exe
4024	powershell.exe
488	powershell.exe
488	powershell.exe
1516	powershell.exe
1516	powershell.exe
5072	powershell.exe
5072	powershell.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
3004	csrss.exe
3004	csrss.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
3004	csrss.exe
3004	csrss.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe
4560	injector.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

description	pid	Process
Token: SeDebugPrivilege	2600	powershell.exe
Token: SeDebugPrivilege	4936	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Token: SeImpersonatePrivilege	4936	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
Token: SeDebugPrivilege	1088	powershell.exe
Token: SeDebugPrivilege	1380	powershell.exe
Token: SeDebugPrivilege	4024	powershell.exe
Token: SeDebugPrivilege	488	powershell.exe
Token: SeDebugPrivilege	1516	powershell.exe
Token: SeDebugPrivilege	5072	powershell.exe
Token: SeSystemEnvironmentPrivilege	3004	csrss.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 4936 wrote to memory of 2600	4936	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe	81
PID 4936 wrote to memory of 2600	4936	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe	81
PID 4936 wrote to memory of 2600	4936	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe	81
PID 464 wrote to memory of 1088	464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe	87
PID 464 wrote to memory of 1088	464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe	87
PID 464 wrote to memory of 1088	464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe	87
PID 464 wrote to memory of 3856	464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe	89
PID 464 wrote to memory of 3856	464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe	89
PID 3856 wrote to memory of 3924	3856	cmd.exe	91
PID 3856 wrote to memory of 3924	3856	cmd.exe	91
PID 464 wrote to memory of 1380	464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe	92
PID 464 wrote to memory of 1380	464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe	92
PID 464 wrote to memory of 1380	464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe	92
PID 464 wrote to memory of 4024	464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe	94
PID 464 wrote to memory of 4024	464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe	94
PID 464 wrote to memory of 4024	464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe	94
PID 464 wrote to memory of 3004	464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe	96
PID 464 wrote to memory of 3004	464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe	96
PID 464 wrote to memory of 3004	464	1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe	96
PID 3004 wrote to memory of 488	3004	csrss.exe	97
PID 3004 wrote to memory of 488	3004	csrss.exe	97
PID 3004 wrote to memory of 488	3004	csrss.exe	97
PID 3004 wrote to memory of 1516	3004	csrss.exe	103
PID 3004 wrote to memory of 1516	3004	csrss.exe	103
PID 3004 wrote to memory of 1516	3004	csrss.exe	103
PID 3004 wrote to memory of 5072	3004	csrss.exe	105
PID 3004 wrote to memory of 5072	3004	csrss.exe	105
PID 3004 wrote to memory of 5072	3004	csrss.exe	105
PID 3004 wrote to memory of 4560	3004	csrss.exe	107
PID 3004 wrote to memory of 4560	3004	csrss.exe	107

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\1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
"C:\Users\Admin\AppData\Local\Temp\1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4936
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell -nologo -noprofile
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2600
- C:\Users\Admin\AppData\Local\Temp\1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.exe
  "C:\Users\Admin\AppData\Local\Temp\1aa5aa457afb4b35ed8ce9b7089278c8b7621269364432799ba2f3bcb17d6f33.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:464
- - 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:1088
- - 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:3856
  - - 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:3924
- - 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:1380
- - 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:4024
- - 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:3004
  - - 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:488
  - - 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:2192
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /delete /tn ScheduledUpdate /f
      4⤵
      PID:4184
  - - 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:1516
  - - 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:5072
  - - 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:4560
  - - 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:4836

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

Web Service

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

__PSScriptPolicyTest_jumwke21.gvp.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jumwke21.gvp.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

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

Submit Download

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

Submit Download