skuld | bc1b77f9680b9028efd499e3e741d46db003f5470a8b61d21e445eaeb7141045

Analysis

max time kernel
94s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19-12-2024 03:50

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General

Target

bc1b77f9680b9028efd499e3e741d46db003f5470a8b61d21e445eaeb7141045.exe
Size

3.3MB
MD5

2b344d8644f0d502c4c8370ef8674a51
SHA1

d14f20eaf8ea75d6f10c85e2b18fb1d0ee8781da
SHA256

bc1b77f9680b9028efd499e3e741d46db003f5470a8b61d21e445eaeb7141045
SHA512

662edf49f1f008205555ccd39a3b830ae5f42ef9b4b05bd8d8e8432f21aba38eed718ad8c7b705a95a6a1c7c775e07a2f88ab81cfb8d249e458b055c6f89f8d4
SSDEEP

49152:gikXNdLQ4Vfk5AzqIaoiZ8MbSBSFVAYFH9h1LGbExIVOJdWAZ5N0kWfNYWMizPat:fqg9OCR8MbSBUAYFHBBvZlWllrTaGq

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

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe"	bc1b77f9680b9028efd499e3e741d46db003f5470a8b61d21e445eaeb7141045.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4532-0-0x0000000000830000-0x0000000001278000-memory.dmp	upx
behavioral2/memory/4532-1-0x0000000000830000-0x0000000001278000-memory.dmp	upx

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4532	bc1b77f9680b9028efd499e3e741d46db003f5470a8b61d21e445eaeb7141045.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4532 wrote to memory of 948	4532	bc1b77f9680b9028efd499e3e741d46db003f5470a8b61d21e445eaeb7141045.exe	83
PID 4532 wrote to memory of 948	4532	bc1b77f9680b9028efd499e3e741d46db003f5470a8b61d21e445eaeb7141045.exe	83

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
948	attrib.exe

C:\Users\Admin\AppData\Local\Temp\bc1b77f9680b9028efd499e3e741d46db003f5470a8b61d21e445eaeb7141045.exe
"C:\Users\Admin\AppData\Local\Temp\bc1b77f9680b9028efd499e3e741d46db003f5470a8b61d21e445eaeb7141045.exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4532
- C:\Windows\system32\attrib.exe
  attrib +h +s C:\Users\Admin\AppData\Local\Temp\bc1b77f9680b9028efd499e3e741d46db003f5470a8b61d21e445eaeb7141045.exe
  2⤵
  - Views/modifies file attributes
  PID:948

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/4532-0-0x0000000000830000-0x0000000001278000-memory.dmp

Filesize
10.3MB

Download
memory/4532-1-0x0000000000830000-0x0000000001278000-memory.dmp

Filesize
10.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads