skuld | 54dc9f8c8ee674011484b587f1b8bb9263627ce6e38269fab00f0e3d2843994b

Analysis

max time kernel
146s
max time network
106s
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 09:49

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General

Target

main.exe
Size

7.5MB
MD5

3a26ed8326d2cacb7dbfca21ede0a7ec
SHA1

e1390d5fad0850e2697fa92e1b8b3e295746772a
SHA256

54dc9f8c8ee674011484b587f1b8bb9263627ce6e38269fab00f0e3d2843994b
SHA512

4a6cf8c5b4c1decf71d0ec1143afc4b8fd0bcb47be9015348b31b2180eead4405fac5d0cde7c2f461f79c874bd0e9dfc5d5a71e4daee8d5f8e395adb4917d116
SSDEEP

196608:VCfEaDlKHFDrgqQft5x3kJ0INrKAI7Y6tCz2UnzXL:VCcoGFrgr1L3C0elCCz2UnzX

Score

10^/10

skuld persistence stealer upx

Malware Config

Extracted

Family

skuld

https://discord.com/api/webhooks/1302202147064119357/E-X5awV-gyAF3En53aWIADdVrCfZRUhTifv9oA7SuxuNOoWYtSX7EiDlFwWQPiNcLepI

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

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe"	main.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3932-0-0x0000000000760000-0x000000000169A000-memory.dmp	upx
behavioral2/memory/3932-2-0x0000000000760000-0x000000000169A000-memory.dmp	upx

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3932	main.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3932 wrote to memory of 1592	3932	main.exe	87
PID 3932 wrote to memory of 1592	3932	main.exe	87

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1592	attrib.exe

C:\Users\Admin\AppData\Local\Temp\main.exe
"C:\Users\Admin\AppData\Local\Temp\main.exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3932
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\main.exe
  2⤵
  - Views/modifies file attributes
  PID:1592

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

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Downloads

memory/3932-0-0x0000000000760000-0x000000000169A000-memory.dmp

Filesize
15.2MB

Download
memory/3932-2-0x0000000000760000-0x000000000169A000-memory.dmp

Filesize
15.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads