gh0strat | 244a9c5318e98599c60f3dacbff48f4f0a898ccda29ad8a6a8625e3cfe0dbc22

General

Target
244A9C5318E98599C60F3DACBFF48F4F0A898CCDA29AD.exe
Size 184KB
Sample220427-bncs1afad6
SHA256 244a9c5318e98599c60f3dacbff48f4f0a898ccda29ad8a6a8625e3cfe0dbc22
MD5 0a56a968a7f1c3d265acf38740a93d38
SHA1 bf17dcba21603a6681f0f9bbec81d356e33d9029
SHA512 81d90036885ec7389f146bef660a8553a76179972ddffa5e001f74104165166cf0aad2355db6c80575b26c7b5012aea973470f02913ba128c28e71449f03919f
MD5 SHA1 SHA512

Score

10^/10

gh0strat bootkit persistence rat suricata

Malware Config

Signatures

Gh0st RAT payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000900000002313e-130.dat	family_gh0strat
behavioral2/files/0x000900000002313e-131.dat	family_gh0strat

Gh0strat
Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.
rat gh0strat
suricata: ET MALWARE Backdoor family PCRat/Gh0st CnC traffic
suricata: ET MALWARE Backdoor family PCRat/Gh0st CnC traffic
suricata
suricata: ET MALWARE Backdoor family PCRat/Gh0st CnC traffic (OUTBOUND) 102
suricata: ET MALWARE Backdoor family PCRat/Gh0st CnC traffic (OUTBOUND) 102
suricata
Sets DLL path for service in the registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

Loads dropped DLL 1 IoCs

pid	Process
4536	svchost.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1067

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\ntfastuserswitchingcompatibility.dll	244A9C5318E98599C60F3DACBFF48F4F0A898CCDA29AD.exe
File opened for modification	C:\Windows\SysWOW64\d2f5ca0e.del	244A9C5318E98599C60F3DACBFF48F4F0A898CCDA29AD.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	svchost.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	svchost.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie	svchost.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum\Version = "7"	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2452	244A9C5318E98599C60F3DACBFF48F4F0A898CCDA29AD.exe
2452	244A9C5318E98599C60F3DACBFF48F4F0A898CCDA29AD.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeBackupPrivilege	4536	svchost.exe
Token: SeSecurityPrivilege	4536	svchost.exe
Token: SeSecurityPrivilege	4536	svchost.exe
Token: SeBackupPrivilege	4536	svchost.exe
Token: SeSecurityPrivilege	4536	svchost.exe
Token: SeBackupPrivilege	4536	svchost.exe
Token: SeSecurityPrivilege	4536	svchost.exe

C:\Users\Admin\AppData\Local\Temp\244A9C5318E98599C60F3DACBFF48F4F0A898CCDA29AD.exe
"C:\Users\Admin\AppData\Local\Temp\244A9C5318E98599C60F3DACBFF48F4F0A898CCDA29AD.exe"
1⤵
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
PID:2452

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k netsvcs -s fastuserswitchingcompatibility
1⤵
- Loads dropped DLL
- Writes to the Master Boot Record (MBR)
- Checks processor information in registry
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:4536

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

1

T1067

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

ntfastuserswitchingcompatibility.dll

Path C:\Windows\SysWOW64\ntfastuserswitchingcompatibility.dll
Size 148KB
SHA256 fcfb65748ba59e37e962618a484087b43da6be9d787f9d73b156d5f14ffedbd3
MD5 e46805ba07872d3ce3153e942e625865
SHA1 00fa01edafea33663aea78dec6e87570222d56a2
SHA512 44b0eee1c7818cf02ef4da94ea612981ab97a31e3575971bd543b6a61deece62a428eca33e554e311ff599d596117847a422753e3a393c1ae68ddad5850131cf
SSDEEP 3072:OG9v4j63IWg/1y14FDTZ2WRDiPa3TBft8nIIHtLl:Ogvw7H/8167hiPa3TBl8nIIHtL
MD5 SHA1 SHA512 SSDEEP

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