stealc | b8239284cd4f9912b1f7a000a28cb07801658479a889292cf00f9c63c30160ce

General

Target

b8239284cd4f9912b1f7a000a28cb07801658479a889292cf00f9c63c30160ce.exe
Size

1.8MB
MD5

0f982748a739bad57e8af8dfe24585f4
SHA1

ad7a19bcdb98c6cec49a5b7795728923dec99ee1
SHA256

b8239284cd4f9912b1f7a000a28cb07801658479a889292cf00f9c63c30160ce
SHA512

23055b4bd7dde51a1b882eaa3a5fd60241fe37e7e5f8955e88203be5c4fafd2b7167a23aca66e2fcb7a7dc90545b08a8ff503ad5402f785b4168ad9820cbd8f6
SSDEEP

24576:W7YfUB7F1931tb0YaOV+rEfv0xwT3zxNOt4XigDSCuptNEynEsqqfD:W75B7FDFtb0Ya8aesY3Ot4N7G/

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/ta904ek

https://steamcommunity.com/profiles/76561199695752269

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

Detect Vidar Stealer 8 IoCs

stealer

resource	yara_rule
behavioral2/memory/1216-1-0x0000000004000000-0x000000000414C000-memory.dmp	family_vidar_v7
behavioral2/memory/4608-4-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/4608-8-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/4608-9-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/4608-15-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/4608-16-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/4608-33-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/4608-34-0x0000000000400000-0x0000000000649000-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
4608	kat5BEB.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 1216 set thread context of 4608	1216	b8239284cd4f9912b1f7a000a28cb07801658479a889292cf00f9c63c30160ce.exe	80

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	kat5BEB.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4608	kat5BEB.tmp
4608	kat5BEB.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1216 wrote to memory of 4608	1216	b8239284cd4f9912b1f7a000a28cb07801658479a889292cf00f9c63c30160ce.exe	80
PID 1216 wrote to memory of 4608	1216	b8239284cd4f9912b1f7a000a28cb07801658479a889292cf00f9c63c30160ce.exe	80
PID 1216 wrote to memory of 4608	1216	b8239284cd4f9912b1f7a000a28cb07801658479a889292cf00f9c63c30160ce.exe	80
PID 1216 wrote to memory of 4608	1216	b8239284cd4f9912b1f7a000a28cb07801658479a889292cf00f9c63c30160ce.exe	80
PID 1216 wrote to memory of 4608	1216	b8239284cd4f9912b1f7a000a28cb07801658479a889292cf00f9c63c30160ce.exe	80
PID 1216 wrote to memory of 4608	1216	b8239284cd4f9912b1f7a000a28cb07801658479a889292cf00f9c63c30160ce.exe	80
PID 1216 wrote to memory of 4608	1216	b8239284cd4f9912b1f7a000a28cb07801658479a889292cf00f9c63c30160ce.exe	80
PID 1216 wrote to memory of 4608	1216	b8239284cd4f9912b1f7a000a28cb07801658479a889292cf00f9c63c30160ce.exe	80

C:\Users\Admin\AppData\Local\Temp\b8239284cd4f9912b1f7a000a28cb07801658479a889292cf00f9c63c30160ce.exe
"C:\Users\Admin\AppData\Local\Temp\b8239284cd4f9912b1f7a000a28cb07801658479a889292cf00f9c63c30160ce.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1216
- C:\Users\Admin\AppData\Local\Temp\kat5BEB.tmp
  C:\Users\Admin\AppData\Local\Temp\kat5BEB.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4608

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\kat5BEB.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1216-0-0x0000000002320000-0x0000000002321000-memory.dmp

Filesize
4KB

Download
memory/1216-1-0x0000000004000000-0x000000000414C000-memory.dmp

Filesize
1.3MB

Download
memory/1216-10-0x0000000000400000-0x00000000005CE000-memory.dmp

Filesize
1.8MB

Download
memory/4608-4-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4608-8-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4608-9-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4608-15-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4608-16-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4608-18-0x0000000019420000-0x000000001967F000-memory.dmp

Filesize
2.4MB

Download
memory/4608-33-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4608-34-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads