skuld | e5dd8734559a07856c50fdbad7c49ecb14c5d2cf615e096d35abbea0442e3c8f

Analysis

max time kernel
30s
max time network
37s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04-11-2024 04:33

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General

Target

Loader.exe
Size

3.2MB
MD5

0a4c593507a31d3f4253df9acfb18685
SHA1

03d6f7fc3bea683c115125e9693c31988502910a
SHA256

e5dd8734559a07856c50fdbad7c49ecb14c5d2cf615e096d35abbea0442e3c8f
SHA512

5cfbfb39a9bfe0d46cc551863c5049c9aa8352c24ffaa8cd5b52e227dee88006610c5bb58b3bc49f6fedfbb7fe996a0a3c9b2d6bf31f770569d456984455628b
SSDEEP

98304:0Do8NHCp5zjlB5FR545qF90ix9OtPnoplk2n:0h0FjlBt5nx85gk2n

Score

10^/10

skuld persistence stealer upx

Malware Config

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:

Loader.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe"	Loader.exe

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4912-0-0x0000000000970000-0x00000000013B8000-memory.dmp	upx
behavioral2/memory/4912-1-0x0000000000970000-0x00000000013B8000-memory.dmp	upx

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Loader.exe

description pid process

Token: SeDebugPrivilege 4912 Loader.exe
Suspicious use of WriteProcessMemory 2 IoCs

Processes:

Loader.exe

description pid process target process

PID 4912 wrote to memory of 1648 4912 Loader.exe attrib.exe
PID 4912 wrote to memory of 1648 4912 Loader.exe attrib.exe
Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exe

pid process

1648 attrib.exe

description	pid	process
Token: SeDebugPrivilege	4912	Loader.exe

description	pid	process	target process
PID 4912 wrote to memory of 1648	4912	Loader.exe	attrib.exe
PID 4912 wrote to memory of 1648	4912	Loader.exe	attrib.exe

pid	process
1648	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Loader.exe
"C:\Users\Admin\AppData\Local\Temp\Loader.exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4912

C:\Windows\system32\attrib.exe
attrib +h +s C:\Users\Admin\AppData\Local\Temp\Loader.exe
2⤵
- Views/modifies file attributes
PID:1648

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

Replay Monitor

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Downloads

memory/4912-0-0x0000000000970000-0x00000000013B8000-memory.dmp

Filesize
10.3MB

Download
memory/4912-1-0x0000000000970000-0x00000000013B8000-memory.dmp

Filesize
10.3MB

Download