skuld | 5dc88f47dfefad9feb60493de86d4bbdd407b158f4b6c768759e726ce497754f

Analysis

max time kernel
133s
max time network
145s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
18-10-2024 04:40

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General

Target

LoPi.exe
Size

9.9MB
MD5

1abd63f11821dd425441e659c890632b
SHA1

e4772d6e84217f0c0ff15aa5580a13f3424d2ac0
SHA256

5dc88f47dfefad9feb60493de86d4bbdd407b158f4b6c768759e726ce497754f
SHA512

29eeab5c7c06b83f0557a375c3faf1fd868dfb2d89f2035728197a45bcb664e951fabfbb5191857beb576a8de3a009aef2f7a760d52305c14c754573e9d3b06e
SSDEEP

98304:hzU4brhxBASgf/gEpiji6Ig8TWA7EIICafZm/mbnXg:hxrhxBAGZji6IdThoRTXg

Score

10^/10

skuld persistence stealer

Malware Config

Extracted

Family

skuld

https://discord.com/api/webhooks/1296197362108338248/k492vQ1I3SDXcmvWcvsy2EcSUzrwhNmILrYhR3qSF8R7tkcE-C5GgZSxuS3IlNschBWg

Signatures

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-1-5-21-873560699-1074803302-2326074425-1000\Software\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe"	LoPi.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
1	api.ipify.org
2	api.ipify.org

Suspicious use of AdjustPrivilegeToken 43 IoCs

description	pid	Process
Token: SeDebugPrivilege	500	LoPi.exe
Token: SeIncreaseQuotaPrivilege	4672	wmic.exe
Token: SeSecurityPrivilege	4672	wmic.exe
Token: SeTakeOwnershipPrivilege	4672	wmic.exe
Token: SeLoadDriverPrivilege	4672	wmic.exe
Token: SeSystemProfilePrivilege	4672	wmic.exe
Token: SeSystemtimePrivilege	4672	wmic.exe
Token: SeProfSingleProcessPrivilege	4672	wmic.exe
Token: SeIncBasePriorityPrivilege	4672	wmic.exe
Token: SeCreatePagefilePrivilege	4672	wmic.exe
Token: SeBackupPrivilege	4672	wmic.exe
Token: SeRestorePrivilege	4672	wmic.exe
Token: SeShutdownPrivilege	4672	wmic.exe
Token: SeDebugPrivilege	4672	wmic.exe
Token: SeSystemEnvironmentPrivilege	4672	wmic.exe
Token: SeRemoteShutdownPrivilege	4672	wmic.exe
Token: SeUndockPrivilege	4672	wmic.exe
Token: SeManageVolumePrivilege	4672	wmic.exe
Token: 33	4672	wmic.exe
Token: 34	4672	wmic.exe
Token: 35	4672	wmic.exe
Token: 36	4672	wmic.exe
Token: SeIncreaseQuotaPrivilege	4672	wmic.exe
Token: SeSecurityPrivilege	4672	wmic.exe
Token: SeTakeOwnershipPrivilege	4672	wmic.exe
Token: SeLoadDriverPrivilege	4672	wmic.exe
Token: SeSystemProfilePrivilege	4672	wmic.exe
Token: SeSystemtimePrivilege	4672	wmic.exe
Token: SeProfSingleProcessPrivilege	4672	wmic.exe
Token: SeIncBasePriorityPrivilege	4672	wmic.exe
Token: SeCreatePagefilePrivilege	4672	wmic.exe
Token: SeBackupPrivilege	4672	wmic.exe
Token: SeRestorePrivilege	4672	wmic.exe
Token: SeShutdownPrivilege	4672	wmic.exe
Token: SeDebugPrivilege	4672	wmic.exe
Token: SeSystemEnvironmentPrivilege	4672	wmic.exe
Token: SeRemoteShutdownPrivilege	4672	wmic.exe
Token: SeUndockPrivilege	4672	wmic.exe
Token: SeManageVolumePrivilege	4672	wmic.exe
Token: 33	4672	wmic.exe
Token: 34	4672	wmic.exe
Token: 35	4672	wmic.exe
Token: 36	4672	wmic.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 500 wrote to memory of 4936	500	LoPi.exe	76
PID 500 wrote to memory of 4936	500	LoPi.exe	76
PID 500 wrote to memory of 4412	500	LoPi.exe	77
PID 500 wrote to memory of 4412	500	LoPi.exe	77
PID 500 wrote to memory of 4672	500	LoPi.exe	78
PID 500 wrote to memory of 4672	500	LoPi.exe	78

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4936	attrib.exe
4412	attrib.exe

C:\Users\Admin\AppData\Local\Temp\LoPi.exe
"C:\Users\Admin\AppData\Local\Temp\LoPi.exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:500
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\LoPi.exe
  2⤵
  - Views/modifies file attributes
  PID:4936
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe
  2⤵
  - Views/modifies file attributes
  PID:4412
- C:\Windows\System32\Wbem\wmic.exe
  wmic csproduct get UUID
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4672

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

C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe

Filesize
9.9MB

MD5
1abd63f11821dd425441e659c890632b

SHA1
e4772d6e84217f0c0ff15aa5580a13f3424d2ac0

SHA256
5dc88f47dfefad9feb60493de86d4bbdd407b158f4b6c768759e726ce497754f

SHA512
29eeab5c7c06b83f0557a375c3faf1fd868dfb2d89f2035728197a45bcb664e951fabfbb5191857beb576a8de3a009aef2f7a760d52305c14c754573e9d3b06e

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads