15c5a29976f91b8f0cdca710967479ee51b6871ad0c6063c1f13bedb6a8d4a30

Analysis

max time kernel
149s
max time network
150s
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 13:39

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General

Target

skuld.exe
Size

9.9MB
MD5

19ea9c966ec6232078b2bd6f8a6f6f9d
SHA1

1279574ce356ef5122d74ecf0ac73e9bf62c9660
SHA256

15c5a29976f91b8f0cdca710967479ee51b6871ad0c6063c1f13bedb6a8d4a30
SHA512

204fa365b432f676e85279a1a4c1cdc63f69fd61122a362f4064b4e5a833c0db8a925be56b3f686599a515745f8a007b6956998616d3bee89db058bb02632b7e
SSDEEP

98304:oWRQmoduu5cb9zXHCVtjteJPYkq4EoD2gCZmJz:VRg75chu/teJPTqxzAz

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-1-5-21-1045960512-3948844814-3059691613-1000\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 1244 skuld.exe
Suspicious use of WriteProcessMemory 2 IoCs

Processes:

skuld.exe

description pid process target process

PID 1244 wrote to memory of 2012 1244 skuld.exe attrib.exe
PID 1244 wrote to memory of 2012 1244 skuld.exe attrib.exe
Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exe

pid process

2012 attrib.exe

description	pid	process
Token: SeDebugPrivilege	1244	skuld.exe

description	pid	process	target process
PID 1244 wrote to memory of 2012	1244	skuld.exe	attrib.exe
PID 1244 wrote to memory of 2012	1244	skuld.exe	attrib.exe

pid	process
2012	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:1244
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\skuld.exe
  2⤵
  - Views/modifies file attributes
  PID:2012

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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