gh0strat | c4d1591719ba4a022577e36e6dafa02be03b248584aa2ad9ab9300fd1d2d6864

General

Target

c4d1591719ba4a022577e36e6dafa02be03b248584aa2ad9ab9300fd1d2d6864.exe
Size

539KB
MD5

4c406785e0262542735f8788d2750db5
SHA1

032a159f0555e9605a09ab539bb4347446ff282e
SHA256

c4d1591719ba4a022577e36e6dafa02be03b248584aa2ad9ab9300fd1d2d6864
SHA512

b2964fc73e1305a1af91507ee7fd60c1dfd71c67f70b89b8cc2d91a7fb6a4387bdc2b4c8f041fa0e2b0023db94ebe2d27595001bf966d1499265d406ab11064f
SSDEEP

12288:3hymnwJFPNdgBAEHApqePJN1AmLM7uVq9sSRLM+:3Umwrl2Ao7sJNlM7ymsSRb

Score

10^/10

gh0strat purplefox discovery persistence rat rootkit trojan upx

Malware Config

Signatures

Detect PurpleFox Rootkit 6 IoCs

Detect PurpleFox Rootkit.

rootkit

resource	yara_rule
behavioral2/memory/4304-1-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/4580-11-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/4304-18-0x0000000000400000-0x0000000000547000-memory.dmp	purplefox_rootkit
behavioral2/memory/4580-21-0x0000000000400000-0x0000000000547000-memory.dmp	purplefox_rootkit
behavioral2/memory/836-23-0x0000000000400000-0x0000000000547000-memory.dmp	purplefox_rootkit
behavioral2/memory/836-38-0x0000000000400000-0x0000000000547000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 6 IoCs

resource	yara_rule
behavioral2/memory/4304-1-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/4580-11-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/4304-18-0x0000000000400000-0x0000000000547000-memory.dmp	family_gh0strat
behavioral2/memory/4580-21-0x0000000000400000-0x0000000000547000-memory.dmp	family_gh0strat
behavioral2/memory/836-23-0x0000000000400000-0x0000000000547000-memory.dmp	family_gh0strat
behavioral2/memory/836-38-0x0000000000400000-0x0000000000547000-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
PurpleFox
PurpleFox is an exploit kit used to distribute other malware families and first seen in 2018.
rootkit trojan purplefox

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File created	C:\Windows\system32\drivers\QAssist.sys	Stumn.exe

Sets service image path in 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\QAssist\ImagePath = "system32\\DRIVERS\\QAssist.sys"	Stumn.exe

Executes dropped EXE 2 IoCs

pid	Process
4580	Stumn.exe
836	Stumn.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4304-0-0x0000000000400000-0x0000000000547000-memory.dmp	upx
behavioral2/files/0x00080000000233fa-9.dat	upx
behavioral2/memory/4304-18-0x0000000000400000-0x0000000000547000-memory.dmp	upx
behavioral2/memory/4580-21-0x0000000000400000-0x0000000000547000-memory.dmp	upx
behavioral2/memory/836-23-0x0000000000400000-0x0000000000547000-memory.dmp	upx
behavioral2/memory/836-38-0x0000000000400000-0x0000000000547000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\AppPatch\Stumn.exe	c4d1591719ba4a022577e36e6dafa02be03b248584aa2ad9ab9300fd1d2d6864.exe
File opened for modification	C:\Program Files (x86)\AppPatch\Stumn.exe	c4d1591719ba4a022577e36e6dafa02be03b248584aa2ad9ab9300fd1d2d6864.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	c4d1591719ba4a022577e36e6dafa02be03b248584aa2ad9ab9300fd1d2d6864.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Stumn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Stumn.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
2876	PING.EXE
5084	cmd.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2876	PING.EXE

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
836	Stumn.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	4304	c4d1591719ba4a022577e36e6dafa02be03b248584aa2ad9ab9300fd1d2d6864.exe
Token: SeLoadDriverPrivilege	836	Stumn.exe
Token: 33	836	Stumn.exe
Token: SeIncBasePriorityPrivilege	836	Stumn.exe
Token: 33	836	Stumn.exe
Token: SeIncBasePriorityPrivilege	836	Stumn.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4304 wrote to memory of 5084	4304	c4d1591719ba4a022577e36e6dafa02be03b248584aa2ad9ab9300fd1d2d6864.exe	85
PID 4304 wrote to memory of 5084	4304	c4d1591719ba4a022577e36e6dafa02be03b248584aa2ad9ab9300fd1d2d6864.exe	85
PID 4304 wrote to memory of 5084	4304	c4d1591719ba4a022577e36e6dafa02be03b248584aa2ad9ab9300fd1d2d6864.exe	85
PID 4580 wrote to memory of 836	4580	Stumn.exe	86
PID 4580 wrote to memory of 836	4580	Stumn.exe	86
PID 4580 wrote to memory of 836	4580	Stumn.exe	86
PID 5084 wrote to memory of 2876	5084	cmd.exe	88
PID 5084 wrote to memory of 2876	5084	cmd.exe	88
PID 5084 wrote to memory of 2876	5084	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\c4d1591719ba4a022577e36e6dafa02be03b248584aa2ad9ab9300fd1d2d6864.exe
"C:\Users\Admin\AppData\Local\Temp\c4d1591719ba4a022577e36e6dafa02be03b248584aa2ad9ab9300fd1d2d6864.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4304
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ping -n 2 127.0.0.1 > nul && del C:\Users\Admin\AppData\Local\Temp\C4D159~1.EXE > nul
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:5084
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 2 127.0.0.1
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2876

C:\Program Files (x86)\AppPatch\Stumn.exe
"C:\Program Files (x86)\AppPatch\Stumn.exe" -auto
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4580
- C:\Program Files (x86)\AppPatch\Stumn.exe
  "C:\Program Files (x86)\AppPatch\Stumn.exe" -acsi
  2⤵
  - Drops file in Drivers directory
  - Sets service image path in registry
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: LoadsDriver
  - Suspicious use of AdjustPrivilegeToken
  PID:836

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

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Remote System Discovery

1

T1018

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

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files (x86)\AppPatch\Stumn.exe

Filesize
539KB

MD5
4c406785e0262542735f8788d2750db5

SHA1
032a159f0555e9605a09ab539bb4347446ff282e

SHA256
c4d1591719ba4a022577e36e6dafa02be03b248584aa2ad9ab9300fd1d2d6864

SHA512
b2964fc73e1305a1af91507ee7fd60c1dfd71c67f70b89b8cc2d91a7fb6a4387bdc2b4c8f041fa0e2b0023db94ebe2d27595001bf966d1499265d406ab11064f

Download Submit
memory/836-23-0x0000000000400000-0x0000000000547000-memory.dmp

Filesize
1.3MB

Download
memory/836-38-0x0000000000400000-0x0000000000547000-memory.dmp

Filesize
1.3MB

Download
memory/4304-0-0x0000000000400000-0x0000000000547000-memory.dmp

Filesize
1.3MB

Download
memory/4304-1-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/4304-18-0x0000000000400000-0x0000000000547000-memory.dmp

Filesize
1.3MB

Download
memory/4580-11-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/4580-21-0x0000000000400000-0x0000000000547000-memory.dmp

Filesize
1.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads