5aa505e38dfbf34d63d80e597a13e70f9b155a8b7e69d933ddd6651de4db283a

Analysis

max time kernel
300s
max time network
205s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
13-10-2024 20:01

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General

Target

skuld.exe
Size

9.9MB
MD5

02fe262032b37676502e9c92366314c2
SHA1

278d4f24247d53bc43485bdc91c49e396cf5d299
SHA256

5aa505e38dfbf34d63d80e597a13e70f9b155a8b7e69d933ddd6651de4db283a
SHA512

c544b30faaa98a9af1d1686087d218328eba271ea2400306344175834d346931f0c2f2c744038340b635bfb44c17ca48698692c66e3791a34cec867b87af89c0
SSDEEP

98304:y/+UKnYehFlLUBnPZZMz9cXU5fp8ePqEzB2v/ZmxzL:Y+oehFN+BY9cXU9p8eP3QIzL

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-1-5-21-4089630652-1596403869-279772308-1000\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 1928 skuld.exe
Suspicious use of WriteProcessMemory 2 IoCs

Processes:

skuld.exe

description pid process target process

PID 1928 wrote to memory of 3124 1928 skuld.exe attrib.exe
PID 1928 wrote to memory of 3124 1928 skuld.exe attrib.exe
Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exe

pid process

3124 attrib.exe

description	pid	process
Token: SeDebugPrivilege	1928	skuld.exe

description	pid	process	target process
PID 1928 wrote to memory of 3124	1928	skuld.exe	attrib.exe
PID 1928 wrote to memory of 3124	1928	skuld.exe	attrib.exe

pid	process
3124	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:1928
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\skuld.exe
  2⤵
  - Views/modifies file attributes
  PID:3124

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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