skuld | 0b57a16929b2c048ed07a5b5a22e0615ddc54052d3bf6e159d402e1db2451993

General

Target

GenesisLoader.exe
Size

3.2MB
MD5

8b684724a136910f13bb804e23f6c063
SHA1

d573add7ec341c34d318407041486827c0e61cc4
SHA256

0b57a16929b2c048ed07a5b5a22e0615ddc54052d3bf6e159d402e1db2451993
SHA512

88d495bca59669ac8a728cd09d47723098840f5dc8afff79882aad6f751b04342d82e7d144306062d5ee535730db4b6f139a81fd2a7b06658aed02eb5f2057fd
SSDEEP

98304:e7Kdi/nDXpVyNpEEY3JcPr4+OUYujeXy:KKduLCNpfY3JX+vje

Score

10^/10

skuld persistence stealer upx

Malware Config

Extracted

Family

skuld

C2

https://discord.com/api/webhooks/1301342721436422225/ExDTQQzBSxDYOtNN8CTw_3RbcACa6OYivXeZWXNHpdqngLp7DaCNXj4g-voNo8MXkuFf

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

Processes:

GenesisLoader.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-870806430-2618236806-3023919190-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe"	GenesisLoader.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/928-0-0x00000000005F0000-0x0000000001038000-memory.dmp	upx
behavioral1/memory/928-2-0x00000000005F0000-0x0000000001038000-memory.dmp	upx
C:\Users\Admin\AppData\Roaming\Microsoft\Protect\SecurityHealthSystray.exe	upx

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

taskmgr.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A	taskmgr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000	taskmgr.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

Processes:

taskmgr.exe

pid	process
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

GenesisLoader.exetaskmgr.exe

description	pid	process
Token: SeDebugPrivilege	928	GenesisLoader.exe
Token: SeDebugPrivilege	4104	taskmgr.exe
Token: SeSystemProfilePrivilege	4104	taskmgr.exe
Token: SeCreateGlobalPrivilege	4104	taskmgr.exe

Suspicious use of FindShellTrayWindow 28 IoCs

Processes:

taskmgr.exe

pid	process
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe

Suspicious use of SendNotifyMessage 28 IoCs

Processes:

taskmgr.exe

pid	process
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe
4104	taskmgr.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

GenesisLoader.exe

description	pid	process	target process
PID 928 wrote to memory of 976	928	GenesisLoader.exe	attrib.exe
PID 928 wrote to memory of 976	928	GenesisLoader.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exe

pid process

976 attrib.exe

pid	process
976	attrib.exe

C:\Users\Admin\AppData\Local\Temp\GenesisLoader.exe
"C:\Users\Admin\AppData\Local\Temp\GenesisLoader.exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:928
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\GenesisLoader.exe
  2⤵
  - Views/modifies file attributes
  PID:976

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:4104

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Hide Artifacts

1

T1564

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
3.2MB

MD5
8b684724a136910f13bb804e23f6c063

SHA1
d573add7ec341c34d318407041486827c0e61cc4

SHA256
0b57a16929b2c048ed07a5b5a22e0615ddc54052d3bf6e159d402e1db2451993

SHA512
88d495bca59669ac8a728cd09d47723098840f5dc8afff79882aad6f751b04342d82e7d144306062d5ee535730db4b6f139a81fd2a7b06658aed02eb5f2057fd

Download Submit
memory/928-0-0x00000000005F0000-0x0000000001038000-memory.dmp

Filesize
10.3MB

Download
memory/928-2-0x00000000005F0000-0x0000000001038000-memory.dmp

Filesize
10.3MB

Download
memory/4104-15-0x000002CF5C9A0000-0x000002CF5C9A1000-memory.dmp

Filesize
4KB

Download
memory/4104-4-0x000002CF5C9A0000-0x000002CF5C9A1000-memory.dmp

Filesize
4KB

Download
memory/4104-14-0x000002CF5C9A0000-0x000002CF5C9A1000-memory.dmp

Filesize
4KB

Download
memory/4104-3-0x000002CF5C9A0000-0x000002CF5C9A1000-memory.dmp

Filesize
4KB

Download
memory/4104-13-0x000002CF5C9A0000-0x000002CF5C9A1000-memory.dmp

Filesize
4KB

Download
memory/4104-12-0x000002CF5C9A0000-0x000002CF5C9A1000-memory.dmp

Filesize
4KB

Download
memory/4104-11-0x000002CF5C9A0000-0x000002CF5C9A1000-memory.dmp

Filesize
4KB

Download
memory/4104-10-0x000002CF5C9A0000-0x000002CF5C9A1000-memory.dmp

Filesize
4KB

Download
memory/4104-9-0x000002CF5C9A0000-0x000002CF5C9A1000-memory.dmp

Filesize
4KB

Download
memory/4104-5-0x000002CF5C9A0000-0x000002CF5C9A1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads