glupteba | a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807

Analysis

max time kernel
149s
max time network
132s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
19/05/2024, 01:53

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General

Target
a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Size 4.1MB
Sample240519-cbe82acd6w
SHA256 a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807
MD5 9ba23dfb7050f4bc9a3bdc4ea466c39a
SHA1 4000320b1fa218b85a68baf1881a6d3a1616d1b1
SHA512 06829f79eefa2eb0987c530535b04be60f9d68f5d957cab5aed4a4c3551538e6cc56922b1fa6fb9245ea75922eba12af9d6031d75247aab1fc49a4e05f5bbb14
SSDEEP 98304:krbgSYZm0VZ47d2LjXdY+WeqK35WW/TEhU3Gu225:krcnZFqd2LRPP3hYhQZ5
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

glupteba discovery dropper evasion execution loader persistence rootkit upx

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/468-2-0x00000000045C0000-0x0000000004EAB000-memory.dmp	family_glupteba
behavioral2/memory/468-3-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/468-78-0x00000000045C0000-0x0000000004EAB000-memory.dmp	family_glupteba
behavioral2/memory/468-76-0x0000000000400000-0x0000000002361000-memory.dmp	family_glupteba
behavioral2/memory/468-120-0x0000000000400000-0x0000000000D1C000-memory.dmp	family_glupteba
behavioral2/memory/4916-119-0x0000000000400000-0x0000000002361000-memory.dmp	family_glupteba
behavioral2/memory/4916-125-0x0000000000400000-0x0000000002361000-memory.dmp	family_glupteba
behavioral2/memory/1464-201-0x0000000000400000-0x0000000002361000-memory.dmp	family_glupteba
behavioral2/memory/1464-212-0x0000000000400000-0x0000000002361000-memory.dmp	family_glupteba
behavioral2/memory/1464-214-0x0000000000400000-0x0000000002361000-memory.dmp	family_glupteba
behavioral2/memory/1464-217-0x0000000000400000-0x0000000002361000-memory.dmp	family_glupteba
behavioral2/memory/1464-220-0x0000000000400000-0x0000000002361000-memory.dmp	family_glupteba
behavioral2/memory/1464-222-0x0000000000400000-0x0000000002361000-memory.dmp	family_glupteba
behavioral2/memory/1464-227-0x0000000000400000-0x0000000002361000-memory.dmp	family_glupteba
behavioral2/memory/1464-229-0x0000000000400000-0x0000000002361000-memory.dmp	family_glupteba
behavioral2/memory/1464-232-0x0000000000400000-0x0000000002361000-memory.dmp	family_glupteba
behavioral2/memory/1464-235-0x0000000000400000-0x0000000002361000-memory.dmp	family_glupteba
behavioral2/memory/1464-237-0x0000000000400000-0x0000000002361000-memory.dmp	family_glupteba
behavioral2/memory/1464-241-0x0000000000400000-0x0000000002361000-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
1088	netsh.exe

Executes dropped EXE 4 IoCs

pid	Process
1464	csrss.exe
4112	injector.exe
3536	windefender.exe
4812	windefender.exe

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x000200000002aa5a-204.dat	upx
behavioral2/memory/3536-205-0x0000000000400000-0x00000000008DF000-memory.dmp	upx
behavioral2/memory/4812-208-0x0000000000400000-0x00000000008DF000-memory.dmp	upx
behavioral2/memory/3536-210-0x0000000000400000-0x00000000008DF000-memory.dmp	upx
behavioral2/memory/4812-215-0x0000000000400000-0x00000000008DF000-memory.dmp	upx
behavioral2/memory/4812-221-0x0000000000400000-0x00000000008DF000-memory.dmp	upx

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-1-5-21-3433428765-2473475212-4279855560-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\""	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3433428765-2473475212-4279855560-1000\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\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
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

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	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\windefender.exe	csrss.exe
File opened for modification	C:\Windows\windefender.exe	csrss.exe
File opened for modification	C:\Windows\rss	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
File created	C:\Windows\rss\csrss.exe	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe

Launches sc.exe 1 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
4476	sc.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 7 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1744	powershell.exe
1236	powershell.exe
1956	powershell.exe
1352	powershell.exe
3972	powershell.exe
2288	powershell.exe
1304	powershell.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
4968	schtasks.exe
5076	schtasks.exe

Modifies data under HKEY_USERS 64 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	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\@tzres.dll,-435 = "Georgian Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-192 = "Mountain Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-3051 = "Qyzylorda Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-2891 = "Sudan Daylight Time"	windefender.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\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,-842 = "Argentina Standard Time"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2432 = "Cuba Standard Time"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-732 = "Fiji Standard Time"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-435 = "Georgian Standard Time"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	powershell.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\@tzres.dll,-2411 = "Marquesas Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-561 = "SE Asia Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-772 = "Montevideo Standard Time"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-891 = "Morocco Daylight Time"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2571 = "Turks and Caicos Daylight Time"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-622 = "Korea Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-182 = "Mountain Standard Time (Mexico)"	windefender.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"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	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\@tzres.dll,-2491 = "Aus Central W. Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-282 = "Central Europe Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-2432 = "Cuba Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-222 = "Alaskan Standard Time"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-81 = "Atlantic Daylight Time"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.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\@tzres.dll,-2391 = "Aleutian Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-491 = "India Daylight Time"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-211 = "Pacific Daylight Time"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2452 = "Saint Pierre Standard Time"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-1412 = "Syria Standard Time"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.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\UNCAsIntranet = "1"	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	powershell.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
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\@tzres.dll,-2511 = "Lord Howe Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-1931 = "Russia TZ 11 Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-431 = "Iran Daylight Time"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-2611 = "Bougainville Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-161 = "Central Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-932 = "Coordinated Universal Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-2631 = "Norfolk Daylight Time"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\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\@tzres.dll,-12 = "Azores Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-71 = "Newfoundland Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-202 = "US Mountain Standard Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-1501 = "Turkey Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-542 = "Myanmar Standard Time"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\C:\Windows\system32\,@tzres.dll,-91 = "Pacific SA Daylight Time"	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs	powershell.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-291 = "Central European Daylight Time"	windefender.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\52C64B7E\@tzres.dll,-2372 = "Easter Island Standard Time"	windefender.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\@tzres.dll,-2182 = "Astrakhan Standard Time"	windefender.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1304	powershell.exe
1304	powershell.exe
468	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
468	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
1744	powershell.exe
1744	powershell.exe
4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
1236	powershell.exe
1236	powershell.exe
1956	powershell.exe
1956	powershell.exe
1352	powershell.exe
1352	powershell.exe
3972	powershell.exe
3972	powershell.exe
2288	powershell.exe
2288	powershell.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
1464	csrss.exe
1464	csrss.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
1464	csrss.exe
1464	csrss.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
1464	csrss.exe
1464	csrss.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe
4112	injector.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

description	pid	Process
Token: SeDebugPrivilege	1304	powershell.exe
Token: SeDebugPrivilege	468	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Token: SeImpersonatePrivilege	468	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
Token: SeDebugPrivilege	1744	powershell.exe
Token: SeDebugPrivilege	1236	powershell.exe
Token: SeDebugPrivilege	1956	powershell.exe
Token: SeDebugPrivilege	1352	powershell.exe
Token: SeDebugPrivilege	3972	powershell.exe
Token: SeDebugPrivilege	2288	powershell.exe
Token: SeSystemEnvironmentPrivilege	1464	csrss.exe
Token: SeSecurityPrivilege	4476	sc.exe
Token: SeSecurityPrivilege	4476	sc.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 468 wrote to memory of 1304	468	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe	82
PID 468 wrote to memory of 1304	468	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe	82
PID 468 wrote to memory of 1304	468	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe	82
PID 4916 wrote to memory of 1744	4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe	87
PID 4916 wrote to memory of 1744	4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe	87
PID 4916 wrote to memory of 1744	4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe	87
PID 4916 wrote to memory of 3200	4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe	89
PID 4916 wrote to memory of 3200	4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe	89
PID 3200 wrote to memory of 1088	3200	cmd.exe	91
PID 3200 wrote to memory of 1088	3200	cmd.exe	91
PID 4916 wrote to memory of 1236	4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe	92
PID 4916 wrote to memory of 1236	4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe	92
PID 4916 wrote to memory of 1236	4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe	92
PID 4916 wrote to memory of 1956	4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe	94
PID 4916 wrote to memory of 1956	4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe	94
PID 4916 wrote to memory of 1956	4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe	94
PID 4916 wrote to memory of 1464	4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe	96
PID 4916 wrote to memory of 1464	4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe	96
PID 4916 wrote to memory of 1464	4916	a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe	96
PID 1464 wrote to memory of 1352	1464	csrss.exe	97
PID 1464 wrote to memory of 1352	1464	csrss.exe	97
PID 1464 wrote to memory of 1352	1464	csrss.exe	97
PID 1464 wrote to memory of 3972	1464	csrss.exe	103
PID 1464 wrote to memory of 3972	1464	csrss.exe	103
PID 1464 wrote to memory of 3972	1464	csrss.exe	103
PID 1464 wrote to memory of 2288	1464	csrss.exe	105
PID 1464 wrote to memory of 2288	1464	csrss.exe	105
PID 1464 wrote to memory of 2288	1464	csrss.exe	105
PID 1464 wrote to memory of 4112	1464	csrss.exe	107
PID 1464 wrote to memory of 4112	1464	csrss.exe	107
PID 3536 wrote to memory of 2996	3536	windefender.exe	113
PID 3536 wrote to memory of 2996	3536	windefender.exe	113
PID 3536 wrote to memory of 2996	3536	windefender.exe	113
PID 2996 wrote to memory of 4476	2996	cmd.exe	114
PID 2996 wrote to memory of 4476	2996	cmd.exe	114
PID 2996 wrote to memory of 4476	2996	cmd.exe	114

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\a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
"C:\Users\Admin\AppData\Local\Temp\a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:468
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell -nologo -noprofile
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1304
- C:\Users\Admin\AppData\Local\Temp\a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.exe
  "C:\Users\Admin\AppData\Local\Temp\a921a7ca6c6614ba7d44dd9dde5645359f2ec9c765a72db2a117347aa7d15807.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:4916
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -nologo -noprofile
    3⤵
    - Drops file in System32 directory
    - Command and Scripting Interpreter: PowerShell
    - Modifies data under HKEY_USERS
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1744
- - 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:3200
  - - 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:1088
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -nologo -noprofile
    3⤵
    - Drops file in System32 directory
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1236
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -nologo -noprofile
    3⤵
    - Drops file in System32 directory
    - Command and Scripting Interpreter: PowerShell
    - Modifies data under HKEY_USERS
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1956
- - C:\Windows\rss\csrss.exe
    C:\Windows\rss\csrss.exe
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Manipulates WinMonFS driver.
    - Drops file in Windows directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1464
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -nologo -noprofile
      4⤵
      Drops file in System32 directory
      Command and Scripting Interpreter: PowerShell
      Modifies data under HKEY_USERS
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1352
  - - 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:4968
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /delete /tn ScheduledUpdate /f
      4⤵
      PID:3816
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -nologo -noprofile
      4⤵
      Drops file in System32 directory
      Command and Scripting Interpreter: PowerShell
      Modifies data under HKEY_USERS
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3972
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -nologo -noprofile
      4⤵
      Drops file in System32 directory
      Command and Scripting Interpreter: PowerShell
      Modifies data under HKEY_USERS
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2288
  - - 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:4112
  - - 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:5076
  - - C:\Windows\windefender.exe
      "C:\Windows\windefender.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:3536
    - - C:\Windows\SysWOW64\cmd.exe
        
        cmd.exe /C sc sdset WinDefender D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPLOCRSDRCWDWO;;;BA)(D;;WPDT;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)S:(AU;FA;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;WD)
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2996
      - C:\Windows\SysWOW64\sc.exe
        
        sc sdset WinDefender D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPLOCRSDRCWDWO;;;BA)(D;;WPDT;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)S:(AU;FA;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;WD)
        6⤵
        Launches sc.exe
        Suspicious use of AdjustPrivilegeToken
        
        PID:4476

C:\Windows\windefender.exe
C:\Windows\windefender.exe
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4812

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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_34x2co0a.kfw.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_34x2co0a.kfw.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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