skuld | 0caa2754c52580bb8efaa1d798f87389982902f71c7b36549759ff9e33e0036f

Analysis

max time kernel
4s
max time network
7s
platform
windows10-2004_x64
resource
win10v2004-20250410-en
resource tags

arch:x64arch:x86image:win10v2004-20250410-enlocale:en-usos:windows10-2004-x64system
submitted
14/04/2025, 23:54

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General

Target

skuld.exe
Size

10.3MB
MD5

d80dc6ed2832129a02a1916ae22be26a
SHA1

06f44d821ad943766b05ade8fa56e8e8f7b7f7eb
SHA256

0caa2754c52580bb8efaa1d798f87389982902f71c7b36549759ff9e33e0036f
SHA512

b251f80b16329109f8e8d1c03e7dd6c68245163858539bf22480485f0708e6dee3fedbbf95649b1ce0f2c5a3ed19bc8ead3b3f4c73b081119f14ad425e267f4c
SSDEEP

98304:aZ/a5vGoCinKm2N2VS+Cs8aaItAOrFqaxFgEpgT5:aw5vGOnK6S+CsdaI2YlpgT

Score

10^/10

skuld persistence stealer

Malware Config

Extracted

Family

skuld

https://discord.com/api/webhooks/1361486763046207628/P7oM_MuJjYmAA5l0jD5BmbQ25jlSYijtIXyk_kmz1kbI2lvdPbYuZuUgwUeWg-P7VWSY

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
4060	SecurityHealthSystray.exe

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-1-5-21-3027557611-1484967174-339164627-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe"	skuld.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3668	skuld.exe
Token: SeDebugPrivilege	4060	SecurityHealthSystray.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3668 wrote to memory of 2540	3668	skuld.exe	85
PID 3668 wrote to memory of 2540	3668	skuld.exe	85
PID 3608 wrote to memory of 4060	3608	cmd.exe	89
PID 3608 wrote to memory of 4060	3608	cmd.exe	89
PID 4060 wrote to memory of 3796	4060	SecurityHealthSystray.exe	92
PID 4060 wrote to memory of 3796	4060	SecurityHealthSystray.exe	92

Views/modifies file attributes 1 TTPs 2 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
2540	attrib.exe
3796	attrib.exe

C:\Users\Admin\AppData\Local\Temp\skuld.exe
"C:\Users\Admin\AppData\Local\Temp\skuld.exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3668
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\skuld.exe
  2⤵
  - Views/modifies file attributes
  PID:2540

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe
1⤵
- Suspicious use of WriteProcessMemory
PID:3608
- C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe
  C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4060
- - C:\Windows\system32\attrib.exe
    attrib +h +s C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe
    3⤵
    - Views/modifies file attributes
    PID:3796

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
10.3MB

MD5
d80dc6ed2832129a02a1916ae22be26a

SHA1
06f44d821ad943766b05ade8fa56e8e8f7b7f7eb

SHA256
0caa2754c52580bb8efaa1d798f87389982902f71c7b36549759ff9e33e0036f

SHA512
b251f80b16329109f8e8d1c03e7dd6c68245163858539bf22480485f0708e6dee3fedbbf95649b1ce0f2c5a3ed19bc8ead3b3f4c73b081119f14ad425e267f4c

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads