stealc | a94274589a8cfa6a6a964fcfa94abdfe07a332c5b3ed66cde697c44e542b9d23

General

Target

a94274589a8cfa6a6a964fcfa94abdfe07a332c5b3ed66cde697c44e542b9d23.exe
Size

2.6MB
MD5

83396dd0c0190a6a1ce208a52eaf90b2
SHA1

6c2fa5393827cc5a650c0dd70679cf1579aafc58
SHA256

a94274589a8cfa6a6a964fcfa94abdfe07a332c5b3ed66cde697c44e542b9d23
SHA512

57d15e90b10e79b500b3ea7a9a060514fcd13b9e1e594bac9f19909c7bc5ba164b569d68907653aaea07c711592e8f7ce104f192090bd07bb224410f6aa86f38
SSDEEP

49152:XQzIzMiqCNwGJtTF+TxMoxc1TU+j+dAzGwlrh:XY598jtIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

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 9 IoCs

stealer

resource	yara_rule
behavioral2/memory/396-1-0x0000000004130000-0x0000000004279000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-53-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-54-0x0000000000400000-0x0000000000646000-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
1744	kat6D8F.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 396 set thread context of 1744	396	a94274589a8cfa6a6a964fcfa94abdfe07a332c5b3ed66cde697c44e542b9d23.exe	77

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	kat6D8F.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1744	kat6D8F.tmp
1744	kat6D8F.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 396 wrote to memory of 1744	396	a94274589a8cfa6a6a964fcfa94abdfe07a332c5b3ed66cde697c44e542b9d23.exe	77
PID 396 wrote to memory of 1744	396	a94274589a8cfa6a6a964fcfa94abdfe07a332c5b3ed66cde697c44e542b9d23.exe	77
PID 396 wrote to memory of 1744	396	a94274589a8cfa6a6a964fcfa94abdfe07a332c5b3ed66cde697c44e542b9d23.exe	77
PID 396 wrote to memory of 1744	396	a94274589a8cfa6a6a964fcfa94abdfe07a332c5b3ed66cde697c44e542b9d23.exe	77
PID 396 wrote to memory of 1744	396	a94274589a8cfa6a6a964fcfa94abdfe07a332c5b3ed66cde697c44e542b9d23.exe	77
PID 396 wrote to memory of 1744	396	a94274589a8cfa6a6a964fcfa94abdfe07a332c5b3ed66cde697c44e542b9d23.exe	77
PID 396 wrote to memory of 1744	396	a94274589a8cfa6a6a964fcfa94abdfe07a332c5b3ed66cde697c44e542b9d23.exe	77
PID 396 wrote to memory of 1744	396	a94274589a8cfa6a6a964fcfa94abdfe07a332c5b3ed66cde697c44e542b9d23.exe	77

C:\Users\Admin\AppData\Local\Temp\a94274589a8cfa6a6a964fcfa94abdfe07a332c5b3ed66cde697c44e542b9d23.exe
"C:\Users\Admin\AppData\Local\Temp\a94274589a8cfa6a6a964fcfa94abdfe07a332c5b3ed66cde697c44e542b9d23.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:396
- C:\Users\Admin\AppData\Local\Temp\kat6D8F.tmp
  C:\Users\Admin\AppData\Local\Temp\kat6D8F.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:1744

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\kat6D8F.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/396-10-0x0000000000400000-0x000000000069E000-memory.dmp

Filesize
2.6MB

Download
memory/396-1-0x0000000004130000-0x0000000004279000-memory.dmp

Filesize
1.3MB

Download
memory/396-0-0x00000000023F0000-0x00000000023F1000-memory.dmp

Filesize
4KB

Download
memory/1744-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1744-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1744-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1744-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1744-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1744-22-0x0000000026050000-0x00000000262AF000-memory.dmp

Filesize
2.4MB

Download
memory/1744-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1744-53-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1744-54-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads