gh0strat | 179dab5fc5a32307466541f88cfc1992cb96664218711f6d525586976c9d44ad

General

Target

bkofkll.exe
Size

1.3MB
MD5

6afc02ebd26a5ff5bd62d93a9e0f627e
SHA1

af04446a727c3b117a9314449b0db0a31fe01b1d
SHA256

179dab5fc5a32307466541f88cfc1992cb96664218711f6d525586976c9d44ad
SHA512

3d9c6d0edf2a87f0e7c2cbbd4b1c103949a145c423f74f12dec6465471cb52bb0a9bcaea4f25b8ee907834b913245d2fd9ef806947c19c6503ee20f31d4a3986
SSDEEP

24576:dOyHutimZ9VSly2hVvHW6qMnSbTBBhBMNl:QHPkVOBTK

Score

10^/10

gh0strat purplefox discovery persistence rat rootkit trojan

Malware Config

Signatures

Detect PurpleFox Rootkit 2 IoCs

Detect PurpleFox Rootkit.

rootkit

resource	yara_rule
behavioral2/memory/2468-0-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/2444-10-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 2 IoCs

resource	yara_rule
behavioral2/memory/2468-0-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/2444-10-0x0000000010000000-0x000000001019F000-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	Wxypq.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"	Wxypq.exe

Executes dropped EXE 2 IoCs

pid	Process
2444	Wxypq.exe
4408	Wxypq.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Wxypq.exe	bkofkll.exe
File opened for modification	C:\Windows\SysWOW64\Wxypq.exe	bkofkll.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	bkofkll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Wxypq.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Wxypq.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
2968	cmd.exe
2124	PING.EXE

Modifies data under HKEY_USERS 3 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	Wxypq.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	Wxypq.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	Wxypq.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2124	PING.EXE

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
4408	Wxypq.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	2468	bkofkll.exe
Token: SeLoadDriverPrivilege	4408	Wxypq.exe
Token: 33	4408	Wxypq.exe
Token: SeIncBasePriorityPrivilege	4408	Wxypq.exe
Token: 33	4408	Wxypq.exe
Token: SeIncBasePriorityPrivilege	4408	Wxypq.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2468 wrote to memory of 2968	2468	bkofkll.exe	87
PID 2468 wrote to memory of 2968	2468	bkofkll.exe	87
PID 2468 wrote to memory of 2968	2468	bkofkll.exe	87
PID 2444 wrote to memory of 4408	2444	Wxypq.exe	88
PID 2444 wrote to memory of 4408	2444	Wxypq.exe	88
PID 2444 wrote to memory of 4408	2444	Wxypq.exe	88
PID 2968 wrote to memory of 2124	2968	cmd.exe	90
PID 2968 wrote to memory of 2124	2968	cmd.exe	90
PID 2968 wrote to memory of 2124	2968	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\bkofkll.exe
"C:\Users\Admin\AppData\Local\Temp\bkofkll.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2468
- 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\bkofkll.exe > nul
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2968
- - 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:2124

C:\Windows\SysWOW64\Wxypq.exe
C:\Windows\SysWOW64\Wxypq.exe -auto
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2444
- C:\Windows\SysWOW64\Wxypq.exe
  C:\Windows\SysWOW64\Wxypq.exe -acsi
  2⤵
  - Drops file in Drivers directory
  - Sets service image path in registry
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Modifies data under HKEY_USERS
  - Suspicious behavior: LoadsDriver
  - Suspicious use of AdjustPrivilegeToken
  PID:4408

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:\Windows\SysWOW64\Wxypq.exe

Filesize
1.3MB

MD5
6afc02ebd26a5ff5bd62d93a9e0f627e

SHA1
af04446a727c3b117a9314449b0db0a31fe01b1d

SHA256
179dab5fc5a32307466541f88cfc1992cb96664218711f6d525586976c9d44ad

SHA512
3d9c6d0edf2a87f0e7c2cbbd4b1c103949a145c423f74f12dec6465471cb52bb0a9bcaea4f25b8ee907834b913245d2fd9ef806947c19c6503ee20f31d4a3986

Download Submit
memory/2444-10-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/2468-0-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads