skuld | 462f543db0c0da74966f556230b1cd1e69109a62288ae369ff5eb7a3652c7bad

Analysis

max time kernel
140s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
16-10-2024 00:16

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General

Target

skuld.exe
Size

3.2MB
MD5

0cbffd5f564734039d04c70ebcb02c08
SHA1

157116051b4abf55ac37df3a16f9e6def53115e2
SHA256

462f543db0c0da74966f556230b1cd1e69109a62288ae369ff5eb7a3652c7bad
SHA512

04b98288b21cd690d1f195c3169b34086d26b44d51c1d989a76e3dfbe1e6cd6d4537592ad74b94cb7fdbde8a88622e20dec9e90d87af7ab64aa41d37bc7650f4
SSDEEP

49152:zejRTaN19D1wntFKsse6lXMlocHWelbNvpGrpkOdkv8FYHVlRXnTa:kRTORyF6mlocHfPvpMkOSUFyXRXT

Score

10^/10

skuld persistence stealer upx

Malware Config

Extracted

Family

skuld

https://discord.com/api/webhooks/1295890787866906655/mfDRgfo1fgUHsaqi_gku2qpFO0-SqKkZjtJEoyALzyVvp2lZDmZFuObthvEby8A5Heii

Signatures

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-1-5-21-3756129449-3121373848-4276368241-1000\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/2848-0-0x0000000000EC0000-0x0000000001907000-memory.dmp	upx
behavioral2/memory/2848-1-0x0000000000EC0000-0x0000000001907000-memory.dmp	upx

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2848	skuld.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2848 wrote to memory of 3492	2848	skuld.exe	84
PID 2848 wrote to memory of 3492	2848	skuld.exe	84

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3492	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:2848
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\skuld.exe
  2⤵
  - Views/modifies file attributes
  PID:3492

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

Replay Monitor

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Downloads

memory/2848-0-0x0000000000EC0000-0x0000000001907000-memory.dmp

Filesize
10.3MB

Download
memory/2848-1-0x0000000000EC0000-0x0000000001907000-memory.dmp

Filesize
10.3MB

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads