skuld | 6e40a38ba66b802dc1a8aa811b0a090651f486cc937bf70809a48186a1e2742b

General

Target

stash.exe
Size

9.9MB
MD5

40ad54e33822abdcd90635d7c67177b3
SHA1

53b241134681528e5d03094d166d6d8b6f2af1a5
SHA256

6e40a38ba66b802dc1a8aa811b0a090651f486cc937bf70809a48186a1e2742b
SHA512

ff88038919a13fd12e0dea90234a38103a01af0b909618c25933e42a0f85b019b8ff3fdde357b2dc5dbd8b437bc273571f639dd2a7a82fe69b3b95c01d27c967
SSDEEP

98304:eQ8s/OFn5xf/vu/JzTTSdObLjCoZ866ExDxgCZmBoH9S4XO:Z83nbf/vAZhLjCoq6nLQ4PX

Score

10^/10

skuld persistence stealer

Malware Config

Extracted

Family

skuld

C2

https://discord.com/api/webhooks/1304955469110055034/m1QTVUBhcZccEpwJaZfvBzrHfDfS7LV_UkVwHOOsYgkvP4PL1bwN71LIje8gpF5r_dPf

Signatures

Skuld family
skuld
Skuld stealer
An info stealer written in Go lang.
stealer skuld

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

stash.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1263212995-3575756360-1418101905-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe"	stash.exe

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

taskmgr.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A	taskmgr.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

Processes:

taskmgr.exe

pid	process
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

stash.exetaskmgr.exe

description	pid	process
Token: SeDebugPrivilege	1412	stash.exe
Token: SeDebugPrivilege	4508	taskmgr.exe
Token: SeSystemProfilePrivilege	4508	taskmgr.exe
Token: SeCreateGlobalPrivilege	4508	taskmgr.exe
Token: 33	4508	taskmgr.exe
Token: SeIncBasePriorityPrivilege	4508	taskmgr.exe

Suspicious use of FindShellTrayWindow 36 IoCs

Processes:

taskmgr.exe

pid	process
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe

Suspicious use of SendNotifyMessage 36 IoCs

Processes:

taskmgr.exe

pid	process
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe
4508	taskmgr.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

stash.exe

description pid process target process

PID 1412 wrote to memory of 2368 1412 stash.exe attrib.exe
PID 1412 wrote to memory of 2368 1412 stash.exe attrib.exe
Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exe

pid process

2368 attrib.exe

description	pid	process	target process
PID 1412 wrote to memory of 2368	1412	stash.exe	attrib.exe
PID 1412 wrote to memory of 2368	1412	stash.exe	attrib.exe

pid	process
2368	attrib.exe

C:\Users\Admin\AppData\Local\Temp\stash.exe
"C:\Users\Admin\AppData\Local\Temp\stash.exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1412
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\stash.exe
  2⤵
  - Views/modifies file attributes
  PID:2368

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:4508

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

Hide Artifacts

1

T1564

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe

Filesize
7.8MB

MD5
73648696c0e6125fb9dbbe9dbac039ce

SHA1
298f6c23620e88a91f61a9852dd806a9c71b2542

SHA256
53339bfb551c891277282a64fddf67707966faa88e4cebd295521ea2fd4383b2

SHA512
a599439f244ba32a6a36f2e4a5db51f4de680360e55c27a48202d92eb83b4bc764916a24bf5a222e3e0df60d860d7ec0d1bd2ce5cb8d231191d043564a64c406

Download Submit
memory/4508-2-0x000001D24B3A0000-0x000001D24B3A1000-memory.dmp

Filesize
4KB

Download
memory/4508-1-0x000001D24B3A0000-0x000001D24B3A1000-memory.dmp

Filesize
4KB

Download
memory/4508-0-0x000001D24B3A0000-0x000001D24B3A1000-memory.dmp

Filesize
4KB

Download
memory/4508-12-0x000001D24B3A0000-0x000001D24B3A1000-memory.dmp

Filesize
4KB

Download
memory/4508-11-0x000001D24B3A0000-0x000001D24B3A1000-memory.dmp

Filesize
4KB

Download
memory/4508-10-0x000001D24B3A0000-0x000001D24B3A1000-memory.dmp

Filesize
4KB

Download
memory/4508-9-0x000001D24B3A0000-0x000001D24B3A1000-memory.dmp

Filesize
4KB

Download
memory/4508-8-0x000001D24B3A0000-0x000001D24B3A1000-memory.dmp

Filesize
4KB

Download
memory/4508-7-0x000001D24B3A0000-0x000001D24B3A1000-memory.dmp

Filesize
4KB

Download
memory/4508-6-0x000001D24B3A0000-0x000001D24B3A1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads