gh0strat | 0c13422c2a81b15c4d9d796c7d7bb5424d7f56c0b77a6743b81d06df957a4be8

Analysis

max time kernel
130s
max time network
140s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
26-12-2023 14:34

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General

Target

75f3cba1a22e0f4b1c9e77b6802a0ccb.exe
Size

194KB
MD5

75f3cba1a22e0f4b1c9e77b6802a0ccb
SHA1

e99dea4efaa1d79cdf3dc3149a1fac6b8dad5cea
SHA256

0c13422c2a81b15c4d9d796c7d7bb5424d7f56c0b77a6743b81d06df957a4be8
SHA512

e6a67e506f8c4b24aa89d9ecbd3c89221a2198301151b9405555ed5d755230603a6508978e9dce696032689ceaac7d36ef51db465ba07be29eff7b24b3fc918a
SSDEEP

3072:ttgBk6W/n3JjfA+YSKIJyNngVwHTU1eNhbcEYjes7u8oWHcrwobOHJ:fgBk6Wf3RfXRWgVCU1yDYjeIHcHb2J

Score

10^/10

gh0strat bootkit persistence rat

Malware Config

Signatures

Gh0st RAT payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000d000000012353-4.dat	family_gh0strat
behavioral1/memory/2440-5-0x0000000000400000-0x0000000000431468-memory.dmp	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

Sets DLL path for service in the registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\fastuserswitchingcompatibility\Parameters\ServiceDll = "C:\\Windows\\system32\\ntfastuserswitchingcompatibility.dll"	75f3cba1a22e0f4b1c9e77b6802a0ccb.exe

Deletes itself 1 IoCs

pid	Process
2328	svchost.exe

Loads dropped DLL 1 IoCs

pid	Process
2328	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

T1542.003

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	75f3cba1a22e0f4b1c9e77b6802a0ccb.exe
File opened for modification	C:\Windows\SysWOW64\d2f5ca0e.del	75f3cba1a22e0f4b1c9e77b6802a0ccb.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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	svchost.exe

Modifies data under HKEY_USERS 6 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\ActiveMovie\devenum	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
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

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2440	75f3cba1a22e0f4b1c9e77b6802a0ccb.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeBackupPrivilege	2328	svchost.exe
Token: SeSecurityPrivilege	2328	svchost.exe
Token: SeSecurityPrivilege	2328	svchost.exe
Token: SeBackupPrivilege	2328	svchost.exe
Token: SeSecurityPrivilege	2328	svchost.exe
Token: SeBackupPrivilege	2328	svchost.exe
Token: SeSecurityPrivilege	2328	svchost.exe

C:\Users\Admin\AppData\Local\Temp\75f3cba1a22e0f4b1c9e77b6802a0ccb.exe
"C:\Users\Admin\AppData\Local\Temp\75f3cba1a22e0f4b1c9e77b6802a0ccb.exe"
1⤵
- Sets DLL path for service in the registry
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
PID:2440

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k netsvcs
1⤵
- Deletes itself
- 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:2328

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

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

\Windows\SysWOW64\ntfastuserswitchingcompatibility.dll

Filesize
148KB

MD5
a7f8386ce35e859629a6a1f3d306e1e0

SHA1
0d1aed7bf6f6a6b31e4c66c0b767cd05ab66d9c7

SHA256
e30bf4939326db715bf883022008cacd809066f87afbd782a1f2f47c95041ca2

SHA512
ca006003a709b8b8a459c053cb6d93972d837b094c973f8c39c849628d2ab00eb83193561c1a00551dd542bdaa82407680c308a71f42f74c6fba8c97f38d58e3

Download Submit
memory/2440-0-0x0000000000400000-0x0000000000431468-memory.dmp

Filesize
197KB

Download
memory/2440-5-0x0000000000400000-0x0000000000431468-memory.dmp

Filesize
197KB

Download