skuld | a4a66b5826dbc95ed463bf1daaa417ae99ea8b1b27ddbacdceba94657babbafc

Analysis

max time kernel
148s
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
31-10-2024 03:42

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General

Target

a4a66b5826dbc95ed463bf1daaa417ae99ea8b1b27ddbacdceba94657babbafc.exe
Size

3.2MB
MD5

96cf5bfd737ba042e552c66fbd2d344e
SHA1

861e144cce53b756a81079923011ad87d6e3ce13
SHA256

a4a66b5826dbc95ed463bf1daaa417ae99ea8b1b27ddbacdceba94657babbafc
SHA512

6c3d9c276d3bc83d2043566da244af4d67f78f8cfb91fefb2c94204a02ab14f51a422407c912d80270959e1673af5edc2ce329821ff7b3daeb7e4e093199b2e9
SSDEEP

49152:yRlxzPzhxMQodCf1Cot+sZsjCsx1S+Of/3SoIT92oOXXbKUEucvUgiekSfmAre1W:yLpxMQt7kCszJ6/3Soe2XXkuZ/Ar

Score

10^/10

skuld persistence stealer upx

Malware Config

Extracted

Family

skuld

https://discordapp.com/api/webhooks/1293231846204903474/NlFoQQli1eEBiZ1mTgA4lGWcgDGUPQu-TH2KjA0djnkLkN-1Rj1Y4K7wda0xn3Aw-GJk

Signatures

Skuld family
skuld
Skuld stealer
An info stealer written in Go lang.
stealer skuld

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

a4a66b5826dbc95ed463bf1daaa417ae99ea8b1b27ddbacdceba94657babbafc.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe"	a4a66b5826dbc95ed463bf1daaa417ae99ea8b1b27ddbacdceba94657babbafc.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/2624-0-0x0000000000A70000-0x00000000014B8000-memory.dmp	upx
behavioral2/memory/2624-2-0x0000000000A70000-0x00000000014B8000-memory.dmp	upx

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

a4a66b5826dbc95ed463bf1daaa417ae99ea8b1b27ddbacdceba94657babbafc.exe

description pid process

Token: SeDebugPrivilege 2624 a4a66b5826dbc95ed463bf1daaa417ae99ea8b1b27ddbacdceba94657babbafc.exe

description	pid	process
Token: SeDebugPrivilege	2624	a4a66b5826dbc95ed463bf1daaa417ae99ea8b1b27ddbacdceba94657babbafc.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

a4a66b5826dbc95ed463bf1daaa417ae99ea8b1b27ddbacdceba94657babbafc.exe

description	pid	process	target process
PID 2624 wrote to memory of 4964	2624	a4a66b5826dbc95ed463bf1daaa417ae99ea8b1b27ddbacdceba94657babbafc.exe	attrib.exe
PID 2624 wrote to memory of 4964	2624	a4a66b5826dbc95ed463bf1daaa417ae99ea8b1b27ddbacdceba94657babbafc.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exe

pid process

4964 attrib.exe

pid	process
4964	attrib.exe

C:\Users\Admin\AppData\Local\Temp\a4a66b5826dbc95ed463bf1daaa417ae99ea8b1b27ddbacdceba94657babbafc.exe
"C:\Users\Admin\AppData\Local\Temp\a4a66b5826dbc95ed463bf1daaa417ae99ea8b1b27ddbacdceba94657babbafc.exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2624
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\a4a66b5826dbc95ed463bf1daaa417ae99ea8b1b27ddbacdceba94657babbafc.exe
  2⤵
  - Views/modifies file attributes
  PID:4964

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

memory/2624-0-0x0000000000A70000-0x00000000014B8000-memory.dmp

Filesize
10.3MB

Download
memory/2624-2-0x0000000000A70000-0x00000000014B8000-memory.dmp

Filesize
10.3MB

Download