skuld | b19201cc1d2e30ae43958648e156691623a2baaf101077e0c72b23928221161a

Analysis

max time kernel
93s
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
10-12-2024 01:37

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General

Target

monoware (2).exe
Size

3.2MB
MD5

cda8f29647039f203d0aa12da2f4a381
SHA1

1896235a432bb8e7610536d6a4bc7569508ef5d2
SHA256

b19201cc1d2e30ae43958648e156691623a2baaf101077e0c72b23928221161a
SHA512

d42dc661b15c274bc5f3c6ab3c5dc0e2d0a2fef8238de3a99d9e78610729cc4ce937c259377f3ad0910a92c1d5c9519dc5075ac2e873377d73d7f57d2f32e358
SSDEEP

98304:aCYBYWCIj0fDy/srgxikWeZAJ58pl0+eK:3YZCIj8DydxL2J5Kq+

Score

10^/10

skuld persistence stealer upx

Malware Config

Extracted

Family

skuld

https://discord.com/api/webhooks/1311423007918657587/yclYArms6ewzHwjqunG4eK-t8axeuB7LcPQALMG0Wkw2awvXWkiJt5LDrZ7YSI05sqns

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-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe"	monoware (2).exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/4924-0-0x00000000005B0000-0x0000000000FF8000-memory.dmp	upx
behavioral1/memory/4924-2-0x00000000005B0000-0x0000000000FF8000-memory.dmp	upx

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4924	monoware (2).exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4924 wrote to memory of 4168	4924	monoware (2).exe	83
PID 4924 wrote to memory of 4168	4924	monoware (2).exe	83

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4168	attrib.exe

C:\Users\Admin\AppData\Local\Temp\monoware (2).exe
"C:\Users\Admin\AppData\Local\Temp\monoware (2).exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4924
- C:\Windows\system32\attrib.exe
  attrib +h +s "C:\Users\Admin\AppData\Local\Temp\monoware (2).exe"
  2⤵
  - Views/modifies file attributes
  PID:4168

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:4552

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/4924-0-0x00000000005B0000-0x0000000000FF8000-memory.dmp

Filesize
10.3MB

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memory/4924-2-0x00000000005B0000-0x0000000000FF8000-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