031f10cbf44a49a9b60f16d7226a790338989e8721bc69bf6d4cd3df9977aed4

Resubmissions

07-11-2024 00:26

241107-arhyratlfj 10

30-10-2024 02:55

241030-desh7svenf 10

30-10-2024 02:16

241030-cqmxessrgz 10

Analysis

max time kernel
71s
max time network
83s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30-10-2024 02:16

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Report Analysis Logs

General

Target

skuld.exe
Size

9.9MB
MD5

b5274b22a9ec286fc42f9518bee6534d
SHA1

f667990c5edb8a0f7b92ec0c914180f31bdbadf4
SHA256

031f10cbf44a49a9b60f16d7226a790338989e8721bc69bf6d4cd3df9977aed4
SHA512

93cc0060d962944f49829a54ab011ec09fbf5528cf84020d6322a1d67734eca0b263e0b2733b93218374187dd636112b5df30240e2272d6ee35fe9625eddf075
SSDEEP

98304:rE/ZGHc/8ieXK0QbbUuMouRRo0OdpEsfEeB2v/ZmqzO:rmIvieXBE6RRo0MpEs8BnzO

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	4572	skuld.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

skuld.exe

description	pid	Process	procid_target
PID 4572 wrote to memory of 4816	4572	skuld.exe	86
PID 4572 wrote to memory of 4816	4572	skuld.exe	86

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

Processes:

attrib.exe

pid	Process
4816	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:4572
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\skuld.exe
  2⤵
  - Views/modifies file attributes
  PID:4816

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:3992

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

C:\Users\Admin\Desktop\New folder

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

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