skuld | 6bf7006b8c6e12b329c5036cb30e148531ebf795205a2e1fdd10e19091e7b813

Analysis

max time kernel
94s
max time network
96s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25-12-2024 21:47

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General

Target

6bf7006b8c6e12b329c5036cb30e148531ebf795205a2e1fdd10e19091e7b813N.exe
Size

3.8MB
MD5

c9bccf935950c17674de5ad941aa37f0
SHA1

9b4e6736a4ce6ada4d25e1625b882051693b4aaf
SHA256

6bf7006b8c6e12b329c5036cb30e148531ebf795205a2e1fdd10e19091e7b813
SHA512

ddd5048cd98868ffb8d8dd5610a5e8841248ab8a225780c1b64a55ce007807d4f9c446d5178db558e18aba1b5807f7e325b82d67acb10fe48dedbc0bd503166c
SSDEEP

98304:wBY5QBeOT3uY2f2HsjkmNF4s0+wzo22A66bpb0C8mvYvGBkb:wm5MXPmN17WYKpVhQ/

Score

10^/10

skuld persistence stealer upx

Malware Config

Extracted

Family

skuld

https://discord.com/api/webhooks/1319769084723724329/0MTnaymIeCHurp0VMDTAOx0iXguX5iiX0hLraxSpl4htUXblPfXoUXl-qUK5q0g8EZ4w

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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe"	6bf7006b8c6e12b329c5036cb30e148531ebf795205a2e1fdd10e19091e7b813N.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3240-0-0x0000000000E80000-0x00000000018C8000-memory.dmp	upx
behavioral2/memory/3240-1-0x0000000000E80000-0x00000000018C8000-memory.dmp	upx

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3240	6bf7006b8c6e12b329c5036cb30e148531ebf795205a2e1fdd10e19091e7b813N.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3240 wrote to memory of 1376	3240	6bf7006b8c6e12b329c5036cb30e148531ebf795205a2e1fdd10e19091e7b813N.exe	86
PID 3240 wrote to memory of 1376	3240	6bf7006b8c6e12b329c5036cb30e148531ebf795205a2e1fdd10e19091e7b813N.exe	86

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1376	attrib.exe

C:\Users\Admin\AppData\Local\Temp\6bf7006b8c6e12b329c5036cb30e148531ebf795205a2e1fdd10e19091e7b813N.exe
"C:\Users\Admin\AppData\Local\Temp\6bf7006b8c6e12b329c5036cb30e148531ebf795205a2e1fdd10e19091e7b813N.exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3240
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\6bf7006b8c6e12b329c5036cb30e148531ebf795205a2e1fdd10e19091e7b813N.exe
  2⤵
  - Views/modifies file attributes
  PID:1376

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/3240-0-0x0000000000E80000-0x00000000018C8000-memory.dmp

Filesize
10.3MB

Download
memory/3240-1-0x0000000000E80000-0x00000000018C8000-memory.dmp

Filesize
10.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads