gh0strat | 3730e600a60fed05d20e23e9340e37e5f5f072e6d4801150326ff4e2a4fdb4c5

General

Target
3730e600a60fed05d20e23e9340e37e5f5f072e6d4801150326ff4e2a4fdb4c5.exe
Size 3.3MB
Sample240620-lrvs4a1cjf
SHA256 3730e600a60fed05d20e23e9340e37e5f5f072e6d4801150326ff4e2a4fdb4c5
MD5 93aef31e912fa9fa0c6423f5eee39b92
SHA1 01743de8f41cedaec95c71d9559624fd537d4dac
SHA512 502c990c9fc0d81526aec775834c852106df585428f9830e983219ea805a8f54013de38c2d741b0765e749165569322662dc66f01555f80c1c35616bb4dfda63
SSDEEP 24576:dOyHutimZ9VSly2hVvHW6qMnSbTBBhBMNII:QHPkVOBTKv
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

gh0strat purplefox persistence rat rootkit trojan

Malware Config

Signatures

Detect PurpleFox Rootkit 3 IoCs

Detect PurpleFox Rootkit.

rootkit

resource	yara_rule
behavioral2/memory/1844-1-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/4800-11-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral2/memory/2116-19-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 3 IoCs

resource	yara_rule
behavioral2/memory/1844-1-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/4800-11-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral2/memory/2116-19-0x0000000010000000-0x000000001019F000-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	sainbox.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"	sainbox.exe

Executes dropped EXE 2 IoCs

pid	Process
4800	sainbox.exe
2116	sainbox.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\sainbox.exe	3730e600a60fed05d20e23e9340e37e5f5f072e6d4801150326ff4e2a4fdb4c5.exe
File created	C:\Windows\SysWOW64\sainbox.exe	3730e600a60fed05d20e23e9340e37e5f5f072e6d4801150326ff4e2a4fdb4c5.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	sainbox.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	sainbox.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	sainbox.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2784	PING.EXE

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
2116	sainbox.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	1844	3730e600a60fed05d20e23e9340e37e5f5f072e6d4801150326ff4e2a4fdb4c5.exe
Token: SeLoadDriverPrivilege	2116	sainbox.exe
Token: 33	2116	sainbox.exe
Token: SeIncBasePriorityPrivilege	2116	sainbox.exe
Token: 33	2116	sainbox.exe
Token: SeIncBasePriorityPrivilege	2116	sainbox.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1844 wrote to memory of 3828	1844	3730e600a60fed05d20e23e9340e37e5f5f072e6d4801150326ff4e2a4fdb4c5.exe	84
PID 1844 wrote to memory of 3828	1844	3730e600a60fed05d20e23e9340e37e5f5f072e6d4801150326ff4e2a4fdb4c5.exe	84
PID 1844 wrote to memory of 3828	1844	3730e600a60fed05d20e23e9340e37e5f5f072e6d4801150326ff4e2a4fdb4c5.exe	84
PID 4800 wrote to memory of 2116	4800	sainbox.exe	85
PID 4800 wrote to memory of 2116	4800	sainbox.exe	85
PID 4800 wrote to memory of 2116	4800	sainbox.exe	85
PID 3828 wrote to memory of 2784	3828	cmd.exe	87
PID 3828 wrote to memory of 2784	3828	cmd.exe	87
PID 3828 wrote to memory of 2784	3828	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\3730e600a60fed05d20e23e9340e37e5f5f072e6d4801150326ff4e2a4fdb4c5.exe
"C:\Users\Admin\AppData\Local\Temp\3730e600a60fed05d20e23e9340e37e5f5f072e6d4801150326ff4e2a4fdb4c5.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1844
- 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\3730E6~1.EXE > nul
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3828
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 2 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:2784

C:\Windows\SysWOW64\sainbox.exe
C:\Windows\SysWOW64\sainbox.exe -auto
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4800
- C:\Windows\SysWOW64\sainbox.exe
  C:\Windows\SysWOW64\sainbox.exe -acsi
  2⤵
  - Drops file in Drivers directory
  - Sets service image path in registry
  - Executes dropped EXE
  - Modifies data under HKEY_USERS
  - Suspicious behavior: LoadsDriver
  - Suspicious use of AdjustPrivilegeToken
  PID:2116

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

sainbox.exe

Path C:\Windows\SysWOW64\sainbox.exe
Size 3.3MB
SHA256 3730e600a60fed05d20e23e9340e37e5f5f072e6d4801150326ff4e2a4fdb4c5
MD5 93aef31e912fa9fa0c6423f5eee39b92
SHA1 01743de8f41cedaec95c71d9559624fd537d4dac
SHA512 502c990c9fc0d81526aec775834c852106df585428f9830e983219ea805a8f54013de38c2d741b0765e749165569322662dc66f01555f80c1c35616bb4dfda63
SSDEEP 24576:dOyHutimZ9VSly2hVvHW6qMnSbTBBhBMNII:QHPkVOBTKv
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1844-1-0x0000000010000000-0x000000001019F000-memory.dmp

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memory/2116-19-0x0000000010000000-0x000000001019F000-memory.dmp

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memory/4800-11-0x0000000010000000-0x000000001019F000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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