stealc | ff05f793fb80283e478a59651ff49524bab5ea2f7b9ab71e54f07862b011dd79

General

Target

ff05f793fb80283e478a59651ff49524bab5ea2f7b9ab71e54f07862b011dd79.exe
Size

2.0MB
MD5

a1a9d3731f940e6d87fd0e2856c2f9f2
SHA1

15092e7c9697b273c9a0bce8496a4a2cecb75485
SHA256

ff05f793fb80283e478a59651ff49524bab5ea2f7b9ab71e54f07862b011dd79
SHA512

c29528d6380f4f7eb899ffb1c615d410b125fc4d597b37ec4653288b1e24ecca7e33329e28bc532cf558d5f503e5d5b28bc00ef1b7a094b8606dc75e5c4f33c7
SSDEEP

49152:IFno/jf4JtTF+TxMoxc1TU+j+dAzGkiT:IFno/jwtIuoITsdZT

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199686524322

https://t.me/k0mono

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4.1 Safari/605.1.15 Ddg/17.4.1

Signatures

Detect Vidar Stealer 8 IoCs

stealer

resource	yara_rule
behavioral2/memory/4768-1-0x0000000003EA0000-0x0000000003FE9000-memory.dmp	family_vidar_v7
behavioral2/memory/600-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/600-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/600-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/600-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/600-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/600-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/600-35-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
600	kat72A0.tmp

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4768 set thread context of 600	4768	ff05f793fb80283e478a59651ff49524bab5ea2f7b9ab71e54f07862b011dd79.exe	74

Checks processor information in registry 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat72A0.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
600	kat72A0.tmp
600	kat72A0.tmp
600	kat72A0.tmp
600	kat72A0.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4768 wrote to memory of 600	4768	ff05f793fb80283e478a59651ff49524bab5ea2f7b9ab71e54f07862b011dd79.exe	74
PID 4768 wrote to memory of 600	4768	ff05f793fb80283e478a59651ff49524bab5ea2f7b9ab71e54f07862b011dd79.exe	74
PID 4768 wrote to memory of 600	4768	ff05f793fb80283e478a59651ff49524bab5ea2f7b9ab71e54f07862b011dd79.exe	74
PID 4768 wrote to memory of 600	4768	ff05f793fb80283e478a59651ff49524bab5ea2f7b9ab71e54f07862b011dd79.exe	74
PID 4768 wrote to memory of 600	4768	ff05f793fb80283e478a59651ff49524bab5ea2f7b9ab71e54f07862b011dd79.exe	74
PID 4768 wrote to memory of 600	4768	ff05f793fb80283e478a59651ff49524bab5ea2f7b9ab71e54f07862b011dd79.exe	74
PID 4768 wrote to memory of 600	4768	ff05f793fb80283e478a59651ff49524bab5ea2f7b9ab71e54f07862b011dd79.exe	74
PID 4768 wrote to memory of 600	4768	ff05f793fb80283e478a59651ff49524bab5ea2f7b9ab71e54f07862b011dd79.exe	74

C:\Users\Admin\AppData\Local\Temp\ff05f793fb80283e478a59651ff49524bab5ea2f7b9ab71e54f07862b011dd79.exe
"C:\Users\Admin\AppData\Local\Temp\ff05f793fb80283e478a59651ff49524bab5ea2f7b9ab71e54f07862b011dd79.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4768
- C:\Users\Admin\AppData\Local\Temp\kat72A0.tmp
  C:\Users\Admin\AppData\Local\Temp\kat72A0.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat72A0.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/600-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/600-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/600-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/600-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/600-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/600-19-0x000000001B6D0000-0x000000001B92F000-memory.dmp

Filesize
2.4MB

Download
memory/600-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/600-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4768-0-0x0000000000780000-0x0000000000781000-memory.dmp

Filesize
4KB

Download
memory/4768-1-0x0000000003EA0000-0x0000000003FE9000-memory.dmp

Filesize
1.3MB

Download
memory/4768-9-0x0000000000400000-0x0000000000602000-memory.dmp

Filesize
2.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads