stealc | 3a7128418c786d4d944c065e068e3fab904640fd9eea441020bb60d5c7365154

General

Target

3a7128418c786d4d944c065e068e3fab904640fd9eea441020bb60d5c7365154.exe
Size

1.9MB
MD5

4fb99384668f330b292a317ac6f675be
SHA1

0aecc0844e93d6f896257ed3b1091fc034bd28c4
SHA256

3a7128418c786d4d944c065e068e3fab904640fd9eea441020bb60d5c7365154
SHA512

7ce5a7ae2c1d9ef7fda29d0985046811865c2f6bf9287ba02cf7ad75edddf938637c049196bb4a524dd0c65aa9ea5dc1545d0522826a8219fc4a1932e627a0a3
SSDEEP

24576:n/eC7bzaXi7m0IJu0LXolGLbJnR/z4+EbVbw2qug4ctOlQLernWO:nGYz0P0IMS4cdR/z4+UVi4e9Crn

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/r8z0l

https://steamcommunity.com/profiles/76561199698764354

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
behavioral1/memory/4632-2-0x0000000002930000-0x0000000002A96000-memory.dmp	family_vidar_v7
behavioral1/memory/2476-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2476-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2476-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2476-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2476-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2476-42-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2476-43-0x0000000000400000-0x0000000000648000-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
2476	kat51BA.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 4632 set thread context of 2476	4632	3a7128418c786d4d944c065e068e3fab904640fd9eea441020bb60d5c7365154.exe	85

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	kat51BA.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2476	kat51BA.tmp
2476	kat51BA.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4632 wrote to memory of 2476	4632	3a7128418c786d4d944c065e068e3fab904640fd9eea441020bb60d5c7365154.exe	85
PID 4632 wrote to memory of 2476	4632	3a7128418c786d4d944c065e068e3fab904640fd9eea441020bb60d5c7365154.exe	85
PID 4632 wrote to memory of 2476	4632	3a7128418c786d4d944c065e068e3fab904640fd9eea441020bb60d5c7365154.exe	85
PID 4632 wrote to memory of 2476	4632	3a7128418c786d4d944c065e068e3fab904640fd9eea441020bb60d5c7365154.exe	85
PID 4632 wrote to memory of 2476	4632	3a7128418c786d4d944c065e068e3fab904640fd9eea441020bb60d5c7365154.exe	85
PID 4632 wrote to memory of 2476	4632	3a7128418c786d4d944c065e068e3fab904640fd9eea441020bb60d5c7365154.exe	85
PID 4632 wrote to memory of 2476	4632	3a7128418c786d4d944c065e068e3fab904640fd9eea441020bb60d5c7365154.exe	85
PID 4632 wrote to memory of 2476	4632	3a7128418c786d4d944c065e068e3fab904640fd9eea441020bb60d5c7365154.exe	85

C:\Users\Admin\AppData\Local\Temp\3a7128418c786d4d944c065e068e3fab904640fd9eea441020bb60d5c7365154.exe
"C:\Users\Admin\AppData\Local\Temp\3a7128418c786d4d944c065e068e3fab904640fd9eea441020bb60d5c7365154.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4632
- C:\Users\Admin\AppData\Local\Temp\kat51BA.tmp
  C:\Users\Admin\AppData\Local\Temp\kat51BA.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2476

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\kat51BA.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2476-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2476-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2476-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2476-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2476-25-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2476-28-0x0000000025F70000-0x00000000261CF000-memory.dmp

Filesize
2.4MB

Download
memory/2476-42-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2476-43-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4632-0-0x0000000002350000-0x0000000002351000-memory.dmp

Filesize
4KB

Download
memory/4632-2-0x0000000002930000-0x0000000002A96000-memory.dmp

Filesize
1.4MB

Download
memory/4632-10-0x0000000000400000-0x00000000005DF000-memory.dmp

Filesize
1.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads