gh0strat | a20c7d4fa5269e46333af14f04b123aeb19073f750864360216e5654853be1d8

General

Target

a20c7d4fa5269e46333af14f04b123aeb19073f750864360216e5654853be1d8.exe
Size

124KB
MD5

6a2e8f641412ab66f41f12f2dcd515b0
SHA1

db4fd6906aa004399d283fc8f93e34211a3b59c9
SHA256

a20c7d4fa5269e46333af14f04b123aeb19073f750864360216e5654853be1d8
SHA512

a6cfe5818baeb628785c415131771329596752130a3f6e9a9ebc1a82a3759838102fc6b088c8a1ba814b6648cca835afa5a149d512f466acca9a7219b467e49e
SSDEEP

3072:G88ntGxqRm0u6xjDKv+gYW589xGgz2tHkDrlJ9ZLk:JgO6MpVi/bOHMf

Score

10^/10

Malware Config

Signatures

Gh0st RAT payload 4 IoCs

resource	yara_rule
behavioral2/files/0x0009000000022e3c-132.dat	family_gh0strat
behavioral2/files/0x0009000000022e3c-133.dat	family_gh0strat
behavioral2/files/0x0009000000022e3c-134.dat	family_gh0strat
behavioral2/files/0x0009000000022e3c-137.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

Blocklisted process makes network request 4 IoCs

flow	pid	Process
22	3420	rundll32.exe
32	3420	rundll32.exe
40	3420	rundll32.exe
44	3420	rundll32.exe

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\kjgakj19dkjfa\Parameters\ServiceDll = "C:\\Windows\\system32\\mte56f0cdm.dll"	a20c7d4fa5269e46333af14f04b123aeb19073f750864360216e5654853be1d8.exe

Sets file execution options in registry 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\restrict.exe\Debugger = "services.exe"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ASDSvc.exe	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ASDSvc.exe\Debugger = "services.exe"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\restrict.exe	rundll32.exe

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	a20c7d4fa5269e46333af14f04b123aeb19073f750864360216e5654853be1d8.exe

Loads dropped DLL 3 IoCs

pid	Process
4388	a20c7d4fa5269e46333af14f04b123aeb19073f750864360216e5654853be1d8.exe
4004	svchost.exe
3420	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\mte56f0cdm.dll	a20c7d4fa5269e46333af14f04b123aeb19073f750864360216e5654853be1d8.exe

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

System Information Discovery
T1082

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4004	svchost.exe
Token: SeIncBasePriorityPrivilege	4388	a20c7d4fa5269e46333af14f04b123aeb19073f750864360216e5654853be1d8.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4004 wrote to memory of 3420	4004	svchost.exe	82
PID 4004 wrote to memory of 3420	4004	svchost.exe	82
PID 4004 wrote to memory of 3420	4004	svchost.exe	82
PID 4388 wrote to memory of 3708	4388	a20c7d4fa5269e46333af14f04b123aeb19073f750864360216e5654853be1d8.exe	84
PID 4388 wrote to memory of 3708	4388	a20c7d4fa5269e46333af14f04b123aeb19073f750864360216e5654853be1d8.exe	84
PID 4388 wrote to memory of 3708	4388	a20c7d4fa5269e46333af14f04b123aeb19073f750864360216e5654853be1d8.exe	84
PID 4388 wrote to memory of 1068	4388	a20c7d4fa5269e46333af14f04b123aeb19073f750864360216e5654853be1d8.exe	87
PID 4388 wrote to memory of 1068	4388	a20c7d4fa5269e46333af14f04b123aeb19073f750864360216e5654853be1d8.exe	87
PID 4388 wrote to memory of 1068	4388	a20c7d4fa5269e46333af14f04b123aeb19073f750864360216e5654853be1d8.exe	87
PID 1068 wrote to memory of 2328	1068	cmd.exe	89
PID 1068 wrote to memory of 2328	1068	cmd.exe	89
PID 1068 wrote to memory of 2328	1068	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\a20c7d4fa5269e46333af14f04b123aeb19073f750864360216e5654853be1d8.exe
"C:\Users\Admin\AppData\Local\Temp\a20c7d4fa5269e46333af14f04b123aeb19073f750864360216e5654853be1d8.exe"
1⤵
- Sets DLL path for service in the registry
- Checks computer location settings
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4388
- C:\Windows\SysWOW64\cmd.exe
  cmd /c del "C:\Users\Admin\AppData\Local\Temp\a20c7d4fa5269e46333af14f04b123aeb19073f750864360216e5654853be1d8.exe"
  2⤵
  PID:3708
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c choice /t 1 /d y /n & del C:\Users\Admin\AppData\Local\Temp\A20C7D~1.EXE > nul
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1068
- - C:\Windows\SysWOW64\choice.exe
    choice /t 1 /d y /n
    3⤵
    PID:2328

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "kjgakj19dkjfa"
1⤵
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4004
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe c:\windows\system32\mte56f0cdm.dll, slexp
  2⤵
  - Blocklisted process makes network request
  - Sets file execution options in registry
  - Loads dropped DLL
  - Modifies data under HKEY_USERS
  PID:3420

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

2

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\mte56f0cdm.dll

Filesize
86KB

MD5
c36d81f879f0a014a8805e4aa3935eb7

SHA1
032100b4dc920584ef3dd87b51019e5449d7d2d3

SHA256
c4ab7b251c9940ea6a92e81022b4d6d24cdbfa6f3675715065b9ccbe4c94b0c3

SHA512
22aef4ad22e278387fa4dfa4db926ed42f2cd1846f5eb53f16c4e6ea2dcfd169980f0ad39c6b85e78f5ddf015fa2576dca5294af4efcef5b137c8dd7ee62c3ca

Download Submit
C:\Windows\SysWOW64\mte56f0cdm.dll

Filesize
86KB

MD5
c36d81f879f0a014a8805e4aa3935eb7

SHA1
032100b4dc920584ef3dd87b51019e5449d7d2d3

SHA256
c4ab7b251c9940ea6a92e81022b4d6d24cdbfa6f3675715065b9ccbe4c94b0c3

SHA512
22aef4ad22e278387fa4dfa4db926ed42f2cd1846f5eb53f16c4e6ea2dcfd169980f0ad39c6b85e78f5ddf015fa2576dca5294af4efcef5b137c8dd7ee62c3ca

Download Submit
C:\Windows\SysWOW64\mte56f0cdm.dll

Filesize
86KB

MD5
c36d81f879f0a014a8805e4aa3935eb7

SHA1
032100b4dc920584ef3dd87b51019e5449d7d2d3

SHA256
c4ab7b251c9940ea6a92e81022b4d6d24cdbfa6f3675715065b9ccbe4c94b0c3

SHA512
22aef4ad22e278387fa4dfa4db926ed42f2cd1846f5eb53f16c4e6ea2dcfd169980f0ad39c6b85e78f5ddf015fa2576dca5294af4efcef5b137c8dd7ee62c3ca

Download Submit
\??\c:\windows\SysWOW64\mte56f0cdm.dll

Filesize
86KB

MD5
c36d81f879f0a014a8805e4aa3935eb7

SHA1
032100b4dc920584ef3dd87b51019e5449d7d2d3

SHA256
c4ab7b251c9940ea6a92e81022b4d6d24cdbfa6f3675715065b9ccbe4c94b0c3

SHA512
22aef4ad22e278387fa4dfa4db926ed42f2cd1846f5eb53f16c4e6ea2dcfd169980f0ad39c6b85e78f5ddf015fa2576dca5294af4efcef5b137c8dd7ee62c3ca

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads