649fcb35cb54854b6f119252d6d3b94f6e6f34e974a92c7864762fd0b5f0280e

Analysis

max time kernel
61s
max time network
63s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
11-11-2024 17:59

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General

Target

skuld.exe
Size

9.9MB
MD5

ca00ff567c0c3dd1cf2a28d1276406d3
SHA1

003999ee3c191f1ffa7ffac4784cbaf2dd01af06
SHA256

649fcb35cb54854b6f119252d6d3b94f6e6f34e974a92c7864762fd0b5f0280e
SHA512

65cd0bb95680e054ca486a55ec292e56526dd4b4ad993e8022dbb9c2991be17dbfb87f17cb3391260cdea69a197b59d12fcc4b38e12a5fdd832d71e3ca0edcbb
SSDEEP

98304:SWRQmoduu5cb9zXHCVtjteJPYkqoEoD2gCZmJz:TRg75chu/teJPTqBzAz

Score

6^/10

persistence

Malware Config

Signatures

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

skuld.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\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 1 IoCs

Processes:

skuld.exe

description	pid	Process
Token: SeDebugPrivilege	372	skuld.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

skuld.exe

description	pid	Process	procid_target
PID 372 wrote to memory of 4872	372	skuld.exe	84
PID 372 wrote to memory of 4872	372	skuld.exe	84

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

Processes:

attrib.exe

pid	Process
4872	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:372
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\skuld.exe
  2⤵
  - Views/modifies file attributes
  PID:4872

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

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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