acfea3b096016e833b7769d0511316b90f2492b425addd98937aa780d390f252

Analysis

max time kernel
133s
max time network
101s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
02-11-2024 01:21

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General

Target

skuld.exe
Size

9.9MB
MD5

d5b11e0e70e19e17a2363ec163ac4a40
SHA1

8133dc0de02cf0d50fd0c1d9a0639fb39b215913
SHA256

acfea3b096016e833b7769d0511316b90f2492b425addd98937aa780d390f252
SHA512

e3b05a92644280c61718f70c43e5c51c4a9e98f568808bbea1c129273fb41c75a9fab43435b1f14775251f7bc2ba0cbd66c949d66883311e062717d791390f40
SSDEEP

98304:qKm8U9RahImtB+LHoL3fScMUyjDOInEKB2v/ZmzzG:pmNahI4qILScMUmDOIE1ezG

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-1-5-21-3227495264-2217614367-4027411560-1000\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 4420 skuld.exe
Suspicious use of WriteProcessMemory 2 IoCs

Processes:

skuld.exe

description pid process target process

PID 4420 wrote to memory of 2424 4420 skuld.exe attrib.exe
PID 4420 wrote to memory of 2424 4420 skuld.exe attrib.exe
Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exe

pid process

2424 attrib.exe

description	pid	process
Token: SeDebugPrivilege	4420	skuld.exe

description	pid	process	target process
PID 4420 wrote to memory of 2424	4420	skuld.exe	attrib.exe
PID 4420 wrote to memory of 2424	4420	skuld.exe	attrib.exe

pid	process
2424	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:4420

C:\Windows\system32\attrib.exe
attrib +h +s C:\Users\Admin\AppData\Local\Temp\skuld.exe
2⤵
- Views/modifies file attributes
PID:2424

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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