gh0strat | fa5e4b6e74a18ed58d98b3662e239e49d606984025ae042deeff385abd46f40b

General

Target

fa5e4b6e74a18ed58d98b3662e239e49d606984025ae042deeff385abd46f40b.exe
Size

143KB
MD5

c3a4ab24763bd70ca6bb5054c8dca536
SHA1

1399e5598ebc5604c32840811e5c1d449a9e5e35
SHA256

fa5e4b6e74a18ed58d98b3662e239e49d606984025ae042deeff385abd46f40b
SHA512

8241469a8f31cb817baf4b853ac11c3aa87455cfaf42f3595e684267c38a53d63b8acb331ffbdb6f1bb6b49ea461b2e24dfa0a513d882050d528d87b4fb5b533
SSDEEP

3072:vhT2137DYmJS6miZtt9uds8NSaqJAyvpVBLOHbQ80CYaxLspZ/:vhRD6JZrr8cjp7LOHb3TxAT

Score

10^/10

gh0strat bootkit persistence rat upx

Malware Config

Signatures

Gh0st RAT payload 6 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3776-141-0x0000000000400000-0x0000000000430000-memory.dmp	family_gh0strat
\??\c:\windows\SysWOW64\jhirf.ref	family_gh0strat
C:\Windows\SysWOW64\jhirf.ref	family_gh0strat
behavioral2/memory/3776-144-0x0000000000400000-0x0000000000430000-memory.dmp	family_gh0strat
behavioral2/memory/2308-145-0x0000000010000000-0x0000000010028000-memory.dmp	family_gh0strat
behavioral2/memory/2308-147-0x0000000010000000-0x0000000010028000-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
Executes dropped EXE 2 IoCs

Processes:

minimum.exe729.exe

pid process

4332 minimum.exe
3776 729.exe

pid	process
4332	minimum.exe
3776	729.exe

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

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

729.exesvchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\fastuserswitchingcompatibility\Parameters\ServiceDll = "C:\\Windows\\system32\\jhirf.ref"	729.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\fastuserswitchingcompatibility\Parameters\ServiceDll = "C:\\Windows\\system32\\jhirf.ref"	svchost.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\fastuserswitchingcompatibility\ImagePath = "%SystemRoot%\\System32\\svchost.exe -k netsvcs"	svchost.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
C:\minimum.exe	upx
C:\minimum.exe	upx
behavioral2/memory/4332-140-0x0000000000400000-0x000000000041C000-memory.dmp	upx
behavioral2/memory/4332-146-0x0000000000400000-0x000000000041C000-memory.dmp	upx

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

fa5e4b6e74a18ed58d98b3662e239e49d606984025ae042deeff385abd46f40b.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	fa5e4b6e74a18ed58d98b3662e239e49d606984025ae042deeff385abd46f40b.exe

Loads dropped DLL 1 IoCs

Processes:

svchost.exe

pid process

2308 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

Processes:

svchost.exe

description ioc process

File opened for modification \??\PhysicalDrive0 svchost.exe

pid	process
2308	svchost.exe

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

Drops file in System32 directory 2 IoCs

Processes:

729.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\d2f5ca0e.del	729.exe
File opened for modification	C:\Windows\SysWOW64\jhirf.ref	729.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

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

Processes:

svchost.exe

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 5 IoCs

Processes:

svchost.exe

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 12 IoCs

Processes:

729.exesvchost.exe

pid	process
3776	729.exe
3776	729.exe
2308	svchost.exe
2308	svchost.exe
2308	svchost.exe
2308	svchost.exe
2308	svchost.exe
2308	svchost.exe
2308	svchost.exe
2308	svchost.exe
2308	svchost.exe
2308	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

minimum.exe

pid process

4332 minimum.exe

pid	process
4332	minimum.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

Processes:

svchost.exe

description	pid	process
Token: SeBackupPrivilege	2308	svchost.exe
Token: SeSecurityPrivilege	2308	svchost.exe
Token: SeSecurityPrivilege	2308	svchost.exe
Token: SeBackupPrivilege	2308	svchost.exe
Token: SeSecurityPrivilege	2308	svchost.exe
Token: SeBackupPrivilege	2308	svchost.exe
Token: SeSecurityPrivilege	2308	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

minimum.exe

pid process

4332 minimum.exe

pid	process
4332	minimum.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

fa5e4b6e74a18ed58d98b3662e239e49d606984025ae042deeff385abd46f40b.exe

description	pid	process	target process
PID 1216 wrote to memory of 4332	1216	fa5e4b6e74a18ed58d98b3662e239e49d606984025ae042deeff385abd46f40b.exe	minimum.exe
PID 1216 wrote to memory of 4332	1216	fa5e4b6e74a18ed58d98b3662e239e49d606984025ae042deeff385abd46f40b.exe	minimum.exe
PID 1216 wrote to memory of 4332	1216	fa5e4b6e74a18ed58d98b3662e239e49d606984025ae042deeff385abd46f40b.exe	minimum.exe
PID 1216 wrote to memory of 3776	1216	fa5e4b6e74a18ed58d98b3662e239e49d606984025ae042deeff385abd46f40b.exe	729.exe
PID 1216 wrote to memory of 3776	1216	fa5e4b6e74a18ed58d98b3662e239e49d606984025ae042deeff385abd46f40b.exe	729.exe
PID 1216 wrote to memory of 3776	1216	fa5e4b6e74a18ed58d98b3662e239e49d606984025ae042deeff385abd46f40b.exe	729.exe

C:\Users\Admin\AppData\Local\Temp\fa5e4b6e74a18ed58d98b3662e239e49d606984025ae042deeff385abd46f40b.exe
"C:\Users\Admin\AppData\Local\Temp\fa5e4b6e74a18ed58d98b3662e239e49d606984025ae042deeff385abd46f40b.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1216

C:\minimum.exe
"C:\minimum.exe"
2⤵
- Executes dropped EXE
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:4332

C:\729.exe
"C:\729.exe"
2⤵
- Executes dropped EXE
- Sets DLL path for service in the registry
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
PID:3776

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k netsvcs -s fastuserswitchingcompatibility
1⤵
- Sets DLL path for service in the registry
- Sets service image path in registry
- Loads dropped DLL
- Writes to the Master Boot Record (MBR)
- Checks processor information in registry
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2308

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

2

T1060

Bootkit

1

T1067

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\729.exe
Filesize
188KB

MD5
5fe9c6876e8913837a4c0e8b6ea7cbad

SHA1
cc1cfb0a06358036673db4c3247f71af5534a88c

SHA256
e6acbcd5e4c63a37e993972456275a432a6facb5668b981a117df83e9b9caadd

SHA512
971f279ebcee863a5164591c95c442d128f5d63fd14177080f787fd56c62abe50336b445ad5358fffe7158078cb7ac99c25f09b0d842d0e8dd3eb0c093a56812

Download Submit
C:\729.exe
Filesize
188KB

MD5
5fe9c6876e8913837a4c0e8b6ea7cbad

SHA1
cc1cfb0a06358036673db4c3247f71af5534a88c

SHA256
e6acbcd5e4c63a37e993972456275a432a6facb5668b981a117df83e9b9caadd

SHA512
971f279ebcee863a5164591c95c442d128f5d63fd14177080f787fd56c62abe50336b445ad5358fffe7158078cb7ac99c25f09b0d842d0e8dd3eb0c093a56812

Download Submit
C:\Windows\SysWOW64\jhirf.ref
Filesize
153KB

MD5
fb901f89a41cdc507f118f51e73ac0ad

SHA1
3f0cfa9e172938e4872ab1f7254f4d57b7c6298f

SHA256
ab91559719bf673ec152d172b49322a108852a3e936b02506b6e8090bdad0d30

SHA512
1bbda6a7496ce1b334a0ec71f5f05cab5f29dfda69ceac8c5a25b34be1c1d074bce7133f9f9ee73f017ca9f7ae1c38ea0f725637aada6abe7c19962444de8eb4

Download Submit
C:\minimum.exe
Filesize
32KB

MD5
0783590053f4539920934532ee95e96c

SHA1
593c9a769077a8dbae293e5f4b88b39a23b7e537

SHA256
18417364f8926f85445e8211146c1b7ee06245a15d8680dc1a517423456d4486

SHA512
efc739efdff553cecf7679e26e7c6b21d451f47885ac0d291699da88dce1d12fcc380cce476606842b4d332fd57c24176e80b05356e938aaff9b4b5cd4e97c3d

Download Submit
C:\minimum.exe
Filesize
32KB

MD5
0783590053f4539920934532ee95e96c

SHA1
593c9a769077a8dbae293e5f4b88b39a23b7e537

SHA256
18417364f8926f85445e8211146c1b7ee06245a15d8680dc1a517423456d4486

SHA512
efc739efdff553cecf7679e26e7c6b21d451f47885ac0d291699da88dce1d12fcc380cce476606842b4d332fd57c24176e80b05356e938aaff9b4b5cd4e97c3d

Download Submit
\??\c:\windows\SysWOW64\jhirf.ref
Filesize
153KB

MD5
fb901f89a41cdc507f118f51e73ac0ad

SHA1
3f0cfa9e172938e4872ab1f7254f4d57b7c6298f

SHA256
ab91559719bf673ec152d172b49322a108852a3e936b02506b6e8090bdad0d30

SHA512
1bbda6a7496ce1b334a0ec71f5f05cab5f29dfda69ceac8c5a25b34be1c1d074bce7133f9f9ee73f017ca9f7ae1c38ea0f725637aada6abe7c19962444de8eb4

Download Submit
memory/2308-147-0x0000000010000000-0x0000000010028000-memory.dmp

Filesize
160KB

Download
memory/2308-145-0x0000000010000000-0x0000000010028000-memory.dmp

Filesize
160KB

Download
memory/3776-135-0x0000000000000000-mapping.dmp

Download
memory/3776-141-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3776-144-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4332-140-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/4332-146-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/4332-132-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads