skuld | 475779eca55ad58973f1da315fc8be958315d6e34751ba6da4be2b1a6736b201

Analysis

max time kernel
92s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
06-12-2024 02:03

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General

Target

skuld.exe
Size

7.5MB
MD5

123ed4573b0c7b489f0e25777ccd39e1
SHA1

14c644a91b6ca0f6bcc731e40617cb012a8b6553
SHA256

475779eca55ad58973f1da315fc8be958315d6e34751ba6da4be2b1a6736b201
SHA512

6acf6ca3ae4af3b2a679139ecf93bf506862a5fc47229f0b86ebb37147b8df3a19a9ffc60fe41906c54bd5d1968814336ee149a68e9671f4dc4535afefb06af4
SSDEEP

196608:6+59cxLEdZwmNV8quEu/0crKmAP1nnv7jiUm9+sFkluKq+L9zc:6+5qLEMc8qXu4NqUm0Hl8+R

Score

10^/10

skuld persistence stealer upx

Malware Config

Extracted

Family

skuld

https://discord.com/api/webhooks/1311740711502352385/Mus14eFpavE24yqmLhHa3WmeZHFCuUvqv8Fe6usJGPf13nz4IDP3bH6YwTfpBBPuEU2R

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

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe"	skuld.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/524-0-0x0000000000CE0000-0x0000000001C1C000-memory.dmp	upx
behavioral2/memory/524-1-0x0000000000CE0000-0x0000000001C1C000-memory.dmp	upx

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	524	skuld.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 524 wrote to memory of 2612	524	skuld.exe	84
PID 524 wrote to memory of 2612	524	skuld.exe	84

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2612	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:524
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\skuld.exe
  2⤵
  - Views/modifies file attributes
  PID:2612

Network

MITRE ATT&CK Enterprise v15

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

memory/524-0-0x0000000000CE0000-0x0000000001C1C000-memory.dmp

Filesize
15.2MB

Download
memory/524-1-0x0000000000CE0000-0x0000000001C1C000-memory.dmp

Filesize
15.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads