gh0strat | bdc8610804f8b5da9e999ee2b2623d2cfbf16d1d4e57fee4a0db49b9e4485d78

General

Target

bdc8610804f8b5da9e999ee2b2623d2cfbf16d1d4e57fee4a0db49b9e4485d78.exe
Size

82KB
MD5

e8e6622c0c138aa05e41ab5bde02db58
SHA1

196ae20a721f3d30e2bbc2d6e86e15e4c208766d
SHA256

bdc8610804f8b5da9e999ee2b2623d2cfbf16d1d4e57fee4a0db49b9e4485d78
SHA512

7cab8712ea685ae0581f531445000fed9688bfd9f7a8aecc92f13e7397292b973685f92d721336ad073ba8b0dcc903473049c9476e439804b256a86cdcc1cdcc
SSDEEP

1536:gW2XxJ+1IT+7SDZIvyDEsq0Hcl16bwpLojUoZwRZJNLmTqWRWaS:gW+J+1IT+cqylD8l1ewpcjUZDNmrI

Score

10^/10

Malware Config

Signatures

Gh0st RAT payload 4 IoCs

resource	yara_rule
behavioral1/memory/1884-54-0x0000000000400000-0x0000000000446000-memory.dmp	family_gh0strat
behavioral1/memory/1884-55-0x0000000000400000-0x0000000000446000-memory.dmp	family_gh0strat
behavioral1/files/0x0008000000014544-57.dat	family_gh0strat
behavioral1/files/0x0008000000014544-56.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

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

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\fastuserswitchingcompatibility\Parameters\ServiceDll = "C:\\Windows\\system32\\ntfastuserswitchingcompatibility.dll"	bdc8610804f8b5da9e999ee2b2623d2cfbf16d1d4e57fee4a0db49b9e4485d78.exe

Deletes itself 1 IoCs

pid	Process
1988	svchost.exe

Loads dropped DLL 1 IoCs

pid	Process
1988	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	bdc8610804f8b5da9e999ee2b2623d2cfbf16d1d4e57fee4a0db49b9e4485d78.exe
File opened for modification	C:\Windows\SysWOW64\d2f5ca0e.del	bdc8610804f8b5da9e999ee2b2623d2cfbf16d1d4e57fee4a0db49b9e4485d78.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 6 IoCs

description	ioc	Process
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
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

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1884	bdc8610804f8b5da9e999ee2b2623d2cfbf16d1d4e57fee4a0db49b9e4485d78.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeBackupPrivilege	1988	svchost.exe
Token: SeSecurityPrivilege	1988	svchost.exe
Token: SeSecurityPrivilege	1988	svchost.exe
Token: SeBackupPrivilege	1988	svchost.exe
Token: SeSecurityPrivilege	1988	svchost.exe
Token: SeBackupPrivilege	1988	svchost.exe
Token: SeSecurityPrivilege	1988	svchost.exe

C:\Users\Admin\AppData\Local\Temp\bdc8610804f8b5da9e999ee2b2623d2cfbf16d1d4e57fee4a0db49b9e4485d78.exe
"C:\Users\Admin\AppData\Local\Temp\bdc8610804f8b5da9e999ee2b2623d2cfbf16d1d4e57fee4a0db49b9e4485d78.exe"
1⤵
- Sets DLL path for service in the registry
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
PID:1884

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:1988

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

\??\c:\windows\SysWOW64\ntfastuserswitchingcompatibility.dll

Filesize
148KB

MD5
fd44e3853c37335fd1932be7eb5eda2f

SHA1
575a2a15e335331851755c07a2bf9ee82da97c90

SHA256
b308b82e9fbe43d50cc6e909292fa8d7f2c48c6156873a4fc3ebc3350b133f1e

SHA512
094e39de8a3696e7631bd34603f0f0278b31a0ce06239254dac86421f842959ec16a9b66fd7242db24c9b30ab1b6e8f1cc814eee31f30ec7d2b67a7cce7aa3e3

Download Submit
\Windows\SysWOW64\ntfastuserswitchingcompatibility.dll

Filesize
148KB

MD5
fd44e3853c37335fd1932be7eb5eda2f

SHA1
575a2a15e335331851755c07a2bf9ee82da97c90

SHA256
b308b82e9fbe43d50cc6e909292fa8d7f2c48c6156873a4fc3ebc3350b133f1e

SHA512
094e39de8a3696e7631bd34603f0f0278b31a0ce06239254dac86421f842959ec16a9b66fd7242db24c9b30ab1b6e8f1cc814eee31f30ec7d2b67a7cce7aa3e3

Download Submit
memory/1884-54-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/1884-55-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/1988-58-0x0000000075571000-0x0000000075573000-memory.dmp

Filesize
8KB

Download

Analysis

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