gh0strat | b845d376ec10829f73178db6987e4cd108790ac38e21c0ca23fc575c3ebc73e7

General

Target

b845d376ec10829f73178db6987e4cd108790ac38e21c0ca23fc575c3ebc73e7.exe
Size

207KB
MD5

e04354bb10e930ca2ab9300c071ef9c5
SHA1

b6bc850b90854b431ee7d1f426cc9bc72c6b071e
SHA256

b845d376ec10829f73178db6987e4cd108790ac38e21c0ca23fc575c3ebc73e7
SHA512

531803775baa1052c90a0b7a3c7a5e37c559017e4fd9ea1a4f4025bd8b911a057d226fb3b9324edcfb9d3548c723f959a67481f016b6a41780ba13c0b9eeeadd
SSDEEP

3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTF:X2vnSwjaOcADw9cUeCOf

Score

10^/10

gh0strat bootkit discovery persistence rat spyware stealer

Malware Config

Extracted

Family

gh0strat

C2

107.163.241.193:6520

http://107.163.241.181:16300/

http://107.163.241.182:12354/login.php

Attributes

user_agent
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C))

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0)

Signatures

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
Gh0strat family
gh0strat

Deletes itself 1 IoCs

pid	Process
3000	gfzls.exe

Executes dropped EXE 2 IoCs

pid	Process
3000	gfzls.exe
3044	gaj.exe

Loads dropped DLL 1 IoCs

pid	Process
3044	gaj.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1161330783-2912525651-1278508834-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\usjgo\\gaj.exe \"c:\\Program Files\\usjgo\\gajwq.dll\",Compliance"	gaj.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\p:	gaj.exe
File opened (read-only)	\??\e:	gaj.exe
File opened (read-only)	\??\g:	gaj.exe
File opened (read-only)	\??\m:	gaj.exe
File opened (read-only)	\??\s:	gaj.exe
File opened (read-only)	\??\v:	gaj.exe
File opened (read-only)	\??\x:	gaj.exe
File opened (read-only)	\??\y:	gaj.exe
File opened (read-only)	\??\a:	gaj.exe
File opened (read-only)	\??\b:	gaj.exe
File opened (read-only)	\??\l:	gaj.exe
File opened (read-only)	\??\n:	gaj.exe
File opened (read-only)	\??\q:	gaj.exe
File opened (read-only)	\??\t:	gaj.exe
File opened (read-only)	\??\u:	gaj.exe
File opened (read-only)	\??\w:	gaj.exe
File opened (read-only)	\??\h:	gaj.exe
File opened (read-only)	\??\i:	gaj.exe
File opened (read-only)	\??\j:	gaj.exe
File opened (read-only)	\??\k:	gaj.exe
File opened (read-only)	\??\o:	gaj.exe
File opened (read-only)	\??\z:	gaj.exe
File opened (read-only)	\??\r:	gaj.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	gaj.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	\??\c:\Program Files\usjgo\gajwq.dll	gfzls.exe
File created	\??\c:\Program Files\usjgo\gaj.exe	gfzls.exe
File opened for modification	\??\c:\Program Files\usjgo\gaj.exe	gfzls.exe
File opened for modification	\??\c:\Program Files\usjgo	gfzls.exe

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gfzls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gaj.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b845d376ec10829f73178db6987e4cd108790ac38e21c0ca23fc575c3ebc73e7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
3988	cmd.exe
2776	PING.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\ProcessorNameString	gaj.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	gaj.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2776	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3044	gaj.exe
3044	gaj.exe
3044	gaj.exe
3044	gaj.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3044	gaj.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2584	b845d376ec10829f73178db6987e4cd108790ac38e21c0ca23fc575c3ebc73e7.exe
3000	gfzls.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2584 wrote to memory of 3988	2584	b845d376ec10829f73178db6987e4cd108790ac38e21c0ca23fc575c3ebc73e7.exe	86
PID 2584 wrote to memory of 3988	2584	b845d376ec10829f73178db6987e4cd108790ac38e21c0ca23fc575c3ebc73e7.exe	86
PID 2584 wrote to memory of 3988	2584	b845d376ec10829f73178db6987e4cd108790ac38e21c0ca23fc575c3ebc73e7.exe	86
PID 3988 wrote to memory of 2776	3988	cmd.exe	88
PID 3988 wrote to memory of 2776	3988	cmd.exe	88
PID 3988 wrote to memory of 2776	3988	cmd.exe	88
PID 3988 wrote to memory of 3000	3988	cmd.exe	90
PID 3988 wrote to memory of 3000	3988	cmd.exe	90
PID 3988 wrote to memory of 3000	3988	cmd.exe	90
PID 3000 wrote to memory of 3044	3000	gfzls.exe	92
PID 3000 wrote to memory of 3044	3000	gfzls.exe	92
PID 3000 wrote to memory of 3044	3000	gfzls.exe	92

C:\Users\Admin\AppData\Local\Temp\b845d376ec10829f73178db6987e4cd108790ac38e21c0ca23fc575c3ebc73e7.exe
"C:\Users\Admin\AppData\Local\Temp\b845d376ec10829f73178db6987e4cd108790ac38e21c0ca23fc575c3ebc73e7.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2584
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\gfzls.exe "C:\Users\Admin\AppData\Local\Temp\b845d376ec10829f73178db6987e4cd108790ac38e21c0ca23fc575c3ebc73e7.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3988
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2776
- - C:\Users\Admin\AppData\Local\Temp\gfzls.exe
    C:\Users\Admin\AppData\Local\Temp\\gfzls.exe "C:\Users\Admin\AppData\Local\Temp\b845d376ec10829f73178db6987e4cd108790ac38e21c0ca23fc575c3ebc73e7.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3000
  - - \??\c:\Program Files\usjgo\gaj.exe
      "c:\Program Files\usjgo\gaj.exe" "c:\Program Files\usjgo\gajwq.dll",Compliance C:\Users\Admin\AppData\Local\Temp\gfzls.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Enumerates connected drives
      Writes to the Master Boot Record (MBR)
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3044

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files\usjgo\gaj.exe

Filesize
60KB

MD5
889b99c52a60dd49227c5e485a016679

SHA1
8fa889e456aa646a4d0a4349977430ce5fa5e2d7

SHA256
6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910

SHA512
08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641

Download Submit
C:\Program Files\usjgo\gajwq.dll

Filesize
141KB

MD5
009d5c61c17fc2bf18022d738299db75

SHA1
918eceb85e18dcdecadcea914dd22651f04016a1

SHA256
6882c66f249240e5858950580255447d2949df69c8482a3cd8ff3bdd82410d2b

SHA512
9be3286bd3c41382ef1dc95ac0d7f3ee551a73845637ad8e535a17d9eb8af55e3fab746a47b32ac93f25ba397994f17da2dab0c323fde8ceb24b8b8c8e300552

Download Submit
C:\Users\Admin\AppData\Local\Temp\gfzls.exe

Filesize
207KB

MD5
98305dfbb1d268b1b77f8d06cda07c28

SHA1
a4b0e535a44f2ea9438d1511765caee04ff9c39f

SHA256
f68aef748cdf4374b1038d230b96a94f416786d6414d552217e0888ae13abd0b

SHA512
a7162151cd8f63943650753a3f15320f1dfb20ca8fa11be937eefc363fe8194297008657f04f5ca6691c019155968736dee3b391ab25efc26abf8fe131d5ae07

Download Submit
memory/2584-4-0x0000000000400000-0x000000000044901D-memory.dmp

Filesize
292KB

Download
memory/2584-0-0x0000000000400000-0x000000000044901D-memory.dmp

Filesize
292KB

Download
memory/2584-2-0x0000000000400000-0x000000000044901D-memory.dmp

Filesize
292KB

Download
memory/2584-1-0x0000000000400000-0x000000000044901D-memory.dmp

Filesize
292KB

Download
memory/3000-8-0x0000000000400000-0x000000000044901D-memory.dmp

Filesize
292KB

Download
memory/3000-9-0x0000000000400000-0x000000000044901D-memory.dmp

Filesize
292KB

Download
memory/3000-15-0x0000000000400000-0x000000000044901D-memory.dmp

Filesize
292KB

Download
memory/3044-19-0x0000000010000000-0x000000001004E000-memory.dmp

Filesize
312KB

Download
memory/3044-20-0x0000000010000000-0x000000001004E000-memory.dmp

Filesize
312KB

Download
memory/3044-24-0x0000000010000000-0x000000001004E000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads