skuld | c128cf0d1afc230ead203fecf537e8161eb9cc1abd3cfbd7d9cf8def2cb4ae10

Resubmissions

25-07-2024 08:53

240725-ktbbssscrh 10

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
25-07-2024 08:53

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General

Target

skuld.sfx.exe
Size

3.7MB
MD5

ab89295610a3a53927f7479c8db9a8a9
SHA1

6060c650d1edcc005982448912fa9a6e18067696
SHA256

c128cf0d1afc230ead203fecf537e8161eb9cc1abd3cfbd7d9cf8def2cb4ae10
SHA512

c2da7a1fc89382bc124f84d9d8150c47db370ecd2ba9d57d80dc0a53eaea6d80f527a22cd6ab1be2b85172f18b840116f821684c7644c8e5f15e53b2d732e1ab
SSDEEP

98304:tWBHStoOEyvuShmCYhCahxI2vCcPUeybvRA5oFO9whPn:EBHSSOZuBC4Ct2vHcrbv18uhP

Score

10^/10

skuld discovery stealer

Malware Config

Extracted

Family

skuld

https://discord.com/api/webhooks/1258409018213269555/uCN0wtYxZNzT5QyuDUtPXUdeYkj3blj_Ed2Glmr-iuRbwAZBTP8DYWusQH-_Wx4qwu1t

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
2344	skuld.exe

Loads dropped DLL 3 IoCs

pid	Process
1700	skuld.sfx.exe
1700	skuld.sfx.exe
1732	Process not Found

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	skuld.sfx.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1700 wrote to memory of 2344	1700	skuld.sfx.exe	30
PID 1700 wrote to memory of 2344	1700	skuld.sfx.exe	30
PID 1700 wrote to memory of 2344	1700	skuld.sfx.exe	30
PID 1700 wrote to memory of 2344	1700	skuld.sfx.exe	30

C:\Users\Admin\AppData\Local\Temp\skuld.sfx.exe
"C:\Users\Admin\AppData\Local\Temp\skuld.sfx.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1700
- C:\Users\Admin\AppData\Local\Temp\RarSFX0\skuld.exe
  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\skuld.exe"
  2⤵
  - Executes dropped EXE
  PID:2344

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\RarSFX0\skuld.exe

Filesize
9.5MB

MD5
9352bacdf89952efe367da4ca81941d9

SHA1
0b98c08b9689d7c18155d31a279fce7e9b4926fe

SHA256
2f0124b95bb1bd8327039dc453d315719ce8c3f73b520821258ae062aba470ae

SHA512
a4984d5ee906467bf3f5108aed217f6c1ba0be7714a50e67b9e4cfecf531b05a45d736c581d0e8010ebeaee69c177c66db704130e1a4989080f91603bc54a1f7

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