stealc | 644bf4c4a487c090b5a026a45edd34d15d4b18a18eb3633867ac7cb524677c7b

General

Target

644bf4c4a487c090b5a026a45edd34d15d4b18a18eb3633867ac7cb524677c7b.exe
Size

1.5MB
MD5

4b8784b7dc61555dc2fcc87c72286a76
SHA1

6a8e16f416da072afb55cc8b4352545849b9ae10
SHA256

644bf4c4a487c090b5a026a45edd34d15d4b18a18eb3633867ac7cb524677c7b
SHA512

a45a2eef043ff34aad0a70933f6a908c5427e3d8816bec338290352e4accef5e651a89af045d81156fc56cb4f6530c50fa77c917bd909a7b804ba1deac80e6f1
SSDEEP

24576:BXc46Crf8fydacHps+/qASfmBgXk/xrADOv1xvF87uLwmnq:BXl8adHHO+SASagXkJr4MDkUwm

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

vidar

C2

https://t.me/g067n

https://steamcommunity.com/profiles/76561199707802586

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Signatures

Detect Vidar Stealer 8 IoCs

stealer

resource	yara_rule
behavioral2/memory/2152-2-0x0000000003FA0000-0x00000000040B0000-memory.dmp	family_vidar_v7
behavioral2/memory/3880-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3880-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3880-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3880-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3880-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3880-42-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3880-43-0x0000000000400000-0x0000000000648000-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
3880	kat6FA2.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 2152 set thread context of 3880	2152	644bf4c4a487c090b5a026a45edd34d15d4b18a18eb3633867ac7cb524677c7b.exe	77

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat6FA2.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat6FA2.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3880	kat6FA2.tmp
3880	kat6FA2.tmp
3880	kat6FA2.tmp
3880	kat6FA2.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2152 wrote to memory of 3880	2152	644bf4c4a487c090b5a026a45edd34d15d4b18a18eb3633867ac7cb524677c7b.exe	77
PID 2152 wrote to memory of 3880	2152	644bf4c4a487c090b5a026a45edd34d15d4b18a18eb3633867ac7cb524677c7b.exe	77
PID 2152 wrote to memory of 3880	2152	644bf4c4a487c090b5a026a45edd34d15d4b18a18eb3633867ac7cb524677c7b.exe	77
PID 2152 wrote to memory of 3880	2152	644bf4c4a487c090b5a026a45edd34d15d4b18a18eb3633867ac7cb524677c7b.exe	77
PID 2152 wrote to memory of 3880	2152	644bf4c4a487c090b5a026a45edd34d15d4b18a18eb3633867ac7cb524677c7b.exe	77
PID 2152 wrote to memory of 3880	2152	644bf4c4a487c090b5a026a45edd34d15d4b18a18eb3633867ac7cb524677c7b.exe	77
PID 2152 wrote to memory of 3880	2152	644bf4c4a487c090b5a026a45edd34d15d4b18a18eb3633867ac7cb524677c7b.exe	77
PID 2152 wrote to memory of 3880	2152	644bf4c4a487c090b5a026a45edd34d15d4b18a18eb3633867ac7cb524677c7b.exe	77

C:\Users\Admin\AppData\Local\Temp\644bf4c4a487c090b5a026a45edd34d15d4b18a18eb3633867ac7cb524677c7b.exe
"C:\Users\Admin\AppData\Local\Temp\644bf4c4a487c090b5a026a45edd34d15d4b18a18eb3633867ac7cb524677c7b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2152
- C:\Users\Admin\AppData\Local\Temp\kat6FA2.tmp
  C:\Users\Admin\AppData\Local\Temp\kat6FA2.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3880

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat6FA2.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2152-0-0x0000000000850000-0x0000000000851000-memory.dmp

Filesize
4KB

Download
memory/2152-2-0x0000000003FA0000-0x00000000040B0000-memory.dmp

Filesize
1.1MB

Download
memory/2152-9-0x0000000000400000-0x000000000058E000-memory.dmp

Filesize
1.6MB

Download
memory/3880-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3880-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3880-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3880-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3880-25-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3880-27-0x000000002F6A0000-0x000000002F8FF000-memory.dmp

Filesize
2.4MB

Download
memory/3880-42-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3880-43-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download

Analysis

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