skuld | e2386170a278f82835c7c888d330fca7f058588cee728db554af82766f373520

Analysis

max time kernel
403s
max time network
1609s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
20-10-2024 23:03

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General

Target

skuld.exe
Size

3.2MB
MD5

51ff57438f949975b4968961bc2642c4
SHA1

cba4898a4d42746c39fe11ebcd4045d4630932b2
SHA256

e2386170a278f82835c7c888d330fca7f058588cee728db554af82766f373520
SHA512

cb1b62473c08d25b49a9c5618ef0399db7bccff983cb11dfd9ec624a203ec1ef3958eef9822672c94676a7cdd484334dca03387450915dddc593bf4541efe859
SSDEEP

98304:9TlvH/VJ51LkW/0A3u+tjoOPztarROVJeE:bVKOu+pkROVJ

Score

10^/10

skuld persistence stealer upx

Malware Config

Extracted

Family

skuld

https://discord.com/api/webhooks/1297685898183315507/dhotfNp8hFrKwfpwrk-upDYLgWkBSeuTImqAAVTnlndZgb3UvqPW2LZA6LIM7wOIg4Sp

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-1-5-21-1687926120-3022217735-1146543763-1000\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
behavioral1/memory/1416-0-0x00000000003E0000-0x0000000000E28000-memory.dmp	upx
behavioral1/memory/1416-1-0x00000000003E0000-0x0000000000E28000-memory.dmp	upx

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1416	skuld.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1416 wrote to memory of 4112	1416	skuld.exe	74
PID 1416 wrote to memory of 4112	1416	skuld.exe	74

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4112	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:1416
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\skuld.exe
  2⤵
  - Views/modifies file attributes
  PID:4112

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/1416-0-0x00000000003E0000-0x0000000000E28000-memory.dmp

Filesize
10.3MB

Download
memory/1416-1-0x00000000003E0000-0x0000000000E28000-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