stealc | 6ff239bc8b49468acfbe0bc3a01a4b310c8ec6ba583f6c9a206a698743c61299

General

Target

6ff239bc8b49468acfbe0bc3a01a4b310c8ec6ba583f6c9a206a698743c61299.exe
Size

2.5MB
MD5

422e0931e65f53a2495c6bdb51e663cb
SHA1

c36cda8854dca9b0abab28393c92d9873b691d03
SHA256

6ff239bc8b49468acfbe0bc3a01a4b310c8ec6ba583f6c9a206a698743c61299
SHA512

81b8dcfcf9f54fa4bc22d5947ed6d8efa4899ab1a9c1ca05f2d933b3376a33edc3c04de8ae4c43ab7eec0107cd0c769693e8412459c1b93d8601eb3ed757d8f1
SSDEEP

49152:+BX5/0mLBI1JV2JtTF+TxMoxc1TU+j+dAzGRX+:+BX5/0mAstIuoITsdZ

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/3132-2-0x0000000004110000-0x000000000425C000-memory.dmp	family_vidar_v7
behavioral2/memory/236-4-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/236-8-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/236-9-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/236-15-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/236-16-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/236-33-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/236-34-0x0000000000400000-0x0000000000649000-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
236	kat5F37.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 3132 set thread context of 236	3132	6ff239bc8b49468acfbe0bc3a01a4b310c8ec6ba583f6c9a206a698743c61299.exe	79

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	kat5F37.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
236	kat5F37.tmp
236	kat5F37.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3132 wrote to memory of 236	3132	6ff239bc8b49468acfbe0bc3a01a4b310c8ec6ba583f6c9a206a698743c61299.exe	79
PID 3132 wrote to memory of 236	3132	6ff239bc8b49468acfbe0bc3a01a4b310c8ec6ba583f6c9a206a698743c61299.exe	79
PID 3132 wrote to memory of 236	3132	6ff239bc8b49468acfbe0bc3a01a4b310c8ec6ba583f6c9a206a698743c61299.exe	79
PID 3132 wrote to memory of 236	3132	6ff239bc8b49468acfbe0bc3a01a4b310c8ec6ba583f6c9a206a698743c61299.exe	79
PID 3132 wrote to memory of 236	3132	6ff239bc8b49468acfbe0bc3a01a4b310c8ec6ba583f6c9a206a698743c61299.exe	79
PID 3132 wrote to memory of 236	3132	6ff239bc8b49468acfbe0bc3a01a4b310c8ec6ba583f6c9a206a698743c61299.exe	79
PID 3132 wrote to memory of 236	3132	6ff239bc8b49468acfbe0bc3a01a4b310c8ec6ba583f6c9a206a698743c61299.exe	79
PID 3132 wrote to memory of 236	3132	6ff239bc8b49468acfbe0bc3a01a4b310c8ec6ba583f6c9a206a698743c61299.exe	79

C:\Users\Admin\AppData\Local\Temp\6ff239bc8b49468acfbe0bc3a01a4b310c8ec6ba583f6c9a206a698743c61299.exe
"C:\Users\Admin\AppData\Local\Temp\6ff239bc8b49468acfbe0bc3a01a4b310c8ec6ba583f6c9a206a698743c61299.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3132
- C:\Users\Admin\AppData\Local\Temp\kat5F37.tmp
  C:\Users\Admin\AppData\Local\Temp\kat5F37.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:236

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\kat5F37.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/236-4-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/236-8-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/236-9-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/236-15-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/236-16-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/236-18-0x0000000019360000-0x00000000195BF000-memory.dmp

Filesize
2.4MB

Download
memory/236-33-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/236-34-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/3132-0-0x00000000024E0000-0x00000000024E1000-memory.dmp

Filesize
4KB

Download
memory/3132-2-0x0000000004110000-0x000000000425C000-memory.dmp

Filesize
1.3MB

Download
memory/3132-10-0x0000000000400000-0x000000000067C000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads