1bea02fdab9cadf73049398d30b8da06d5710919e2d8a478020d60824de8ec9a

Analysis

max time kernel
93s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
19-09-2024 07:56

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General

Target

skuld.exe
Size

9.9MB
MD5

0086632030dd6aee52ba42dda8ef3028
SHA1

bcc1fe470d2da1d3c7d21cc91f6a9706ddff109d
SHA256

1bea02fdab9cadf73049398d30b8da06d5710919e2d8a478020d60824de8ec9a
SHA512

464ac5f3f392cd7b85083c56af826082eb885e34b285d5af4801bdaa14e4ac5325eaec5f473160b5c5a11118e1682883739c17accf7271b7d92805db413735b3
SSDEEP

98304:KMONgsDeidXkFr4SnhLgJpQRpuVydnEmnnvFZm8DZb:/5OeidXileQRpuAdEw1b

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-1-5-21-2412658365-3084825385-3340777666-1000\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 3972 skuld.exe
Suspicious use of WriteProcessMemory 2 IoCs

Processes:

skuld.exe

description pid process target process

PID 3972 wrote to memory of 2120 3972 skuld.exe attrib.exe
PID 3972 wrote to memory of 2120 3972 skuld.exe attrib.exe
Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exe

pid process

2120 attrib.exe

description	pid	process
Token: SeDebugPrivilege	3972	skuld.exe

description	pid	process	target process
PID 3972 wrote to memory of 2120	3972	skuld.exe	attrib.exe
PID 3972 wrote to memory of 2120	3972	skuld.exe	attrib.exe

pid	process
2120	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:3972
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\skuld.exe
  2⤵
  - Views/modifies file attributes
  PID:2120

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:4700

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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