skuld | 27e10c80006f2080f85b3b9aff0d165044d1954385ea16d6e48dabaa6a1ec5af

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15-07-2024 03:33

240715-d4kvnawdjr 10

15-07-2024 03:33

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15-07-2024 03:32

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15-07-2024 03:31

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Analysis

max time kernel
1s
max time network
3s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
15-07-2024 03:33

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General

Target

Terbium.1.2.exe
Size

9.5MB
MD5

df00bc36e9b00874ff8f495a29d9f429
SHA1

3f3140a188943673e7b90b819005548042c9b675
SHA256

27e10c80006f2080f85b3b9aff0d165044d1954385ea16d6e48dabaa6a1ec5af
SHA512

c79ce66d9c73e64cc3060437bf9d2f9f3f17067b0e4ebb8b30d4863ec417ad1f95c315810168d34058f82804ca59a1d8f442d81c265e57dc330670025b152f88
SSDEEP

98304:YVMHJFAvLQWabWp2le10+9XTA8E6oMsaSk5e/UI:PFAvLCev10+9DA16oM1e/UI

Score

10^/10

skuld persistence stealer

Malware Config

Extracted

Family

skuld

https://discord.com/api/webhooks/1260739914253991956/NKvC4KymlhPTNJNmbkQtDwm5AXdtAESkrV95KgMKN5kz9Z_06X949ZzR7jGGnoW0AnBX

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-1-5-21-3968772205-1713802336-1776639840-1000\Software\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe"	Terbium.1.2.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	4296	Terbium.1.2.exe
Token: SeIncreaseQuotaPrivilege	292	wmic.exe
Token: SeSecurityPrivilege	292	wmic.exe
Token: SeTakeOwnershipPrivilege	292	wmic.exe
Token: SeLoadDriverPrivilege	292	wmic.exe
Token: SeSystemProfilePrivilege	292	wmic.exe
Token: SeSystemtimePrivilege	292	wmic.exe
Token: SeProfSingleProcessPrivilege	292	wmic.exe
Token: SeIncBasePriorityPrivilege	292	wmic.exe
Token: SeCreatePagefilePrivilege	292	wmic.exe
Token: SeBackupPrivilege	292	wmic.exe
Token: SeRestorePrivilege	292	wmic.exe
Token: SeShutdownPrivilege	292	wmic.exe
Token: SeDebugPrivilege	292	wmic.exe
Token: SeSystemEnvironmentPrivilege	292	wmic.exe
Token: SeRemoteShutdownPrivilege	292	wmic.exe
Token: SeUndockPrivilege	292	wmic.exe
Token: SeManageVolumePrivilege	292	wmic.exe
Token: 33	292	wmic.exe
Token: 34	292	wmic.exe
Token: 35	292	wmic.exe
Token: 36	292	wmic.exe
Token: SeIncreaseQuotaPrivilege	292	wmic.exe
Token: SeSecurityPrivilege	292	wmic.exe
Token: SeTakeOwnershipPrivilege	292	wmic.exe
Token: SeLoadDriverPrivilege	292	wmic.exe
Token: SeSystemProfilePrivilege	292	wmic.exe
Token: SeSystemtimePrivilege	292	wmic.exe
Token: SeProfSingleProcessPrivilege	292	wmic.exe
Token: SeIncBasePriorityPrivilege	292	wmic.exe
Token: SeCreatePagefilePrivilege	292	wmic.exe
Token: SeBackupPrivilege	292	wmic.exe
Token: SeRestorePrivilege	292	wmic.exe
Token: SeShutdownPrivilege	292	wmic.exe
Token: SeDebugPrivilege	292	wmic.exe
Token: SeSystemEnvironmentPrivilege	292	wmic.exe
Token: SeRemoteShutdownPrivilege	292	wmic.exe
Token: SeUndockPrivilege	292	wmic.exe
Token: SeManageVolumePrivilege	292	wmic.exe
Token: 33	292	wmic.exe
Token: 34	292	wmic.exe
Token: 35	292	wmic.exe
Token: 36	292	wmic.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4296 wrote to memory of 3236	4296	Terbium.1.2.exe	74
PID 4296 wrote to memory of 3236	4296	Terbium.1.2.exe	74
PID 4296 wrote to memory of 1656	4296	Terbium.1.2.exe	75
PID 4296 wrote to memory of 1656	4296	Terbium.1.2.exe	75
PID 4296 wrote to memory of 292	4296	Terbium.1.2.exe	76
PID 4296 wrote to memory of 292	4296	Terbium.1.2.exe	76

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3236	attrib.exe
1656	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Terbium.1.2.exe
"C:\Users\Admin\AppData\Local\Temp\Terbium.1.2.exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4296
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\Terbium.1.2.exe
  2⤵
  - Views/modifies file attributes
  PID:3236
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe
  2⤵
  - Views/modifies file attributes
  PID:1656
- C:\Windows\System32\Wbem\wmic.exe
  wmic csproduct get UUID
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:292

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
9.5MB

MD5
df00bc36e9b00874ff8f495a29d9f429

SHA1
3f3140a188943673e7b90b819005548042c9b675

SHA256
27e10c80006f2080f85b3b9aff0d165044d1954385ea16d6e48dabaa6a1ec5af

SHA512
c79ce66d9c73e64cc3060437bf9d2f9f3f17067b0e4ebb8b30d4863ec417ad1f95c315810168d34058f82804ca59a1d8f442d81c265e57dc330670025b152f88

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Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads