vidar | 3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5

General

Target

3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe
Size

403KB
MD5

1992187cfdd036a0eecb8f5ca9340cc0
SHA1

0aac664d9c06f47a970f88389401a14705337121
SHA256

3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5
SHA512

37651fc773621566790569ec76af4a7e66f50472a7be6ba11575592514e0d11f4ff8cc1c83c5d3ebcde3c15ef942becbb8e71f763398fd5ffaa74c78a0379b92
SSDEEP

12288:9TF2nYPwGYGzePmnWkMkBR0pwvxT613EO:9TF2YPwGleYMkBRVZ6Rt

Score

10^/10

vidar 4b74261d834413e886f920a1e9dc5b33 discovery spyware stealer

Malware Config

Extracted

Family

vidar

Version

11

Botnet

4b74261d834413e886f920a1e9dc5b33

C2

https://steamcommunity.com/profiles/76561199780418869

https://t.me/ae5ed

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:130.0) Gecko/20100101 Firefox/130.0

Signatures

Detect Vidar Stealer 7 IoCs

stealer

resource	yara_rule
behavioral2/memory/3600-3-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/3600-6-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/3600-8-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/3600-18-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/3600-19-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/3600-35-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/3600-36-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Downloads MZ/PE file
Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003
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 2928 set thread context of 3600	2928	3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe	84

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

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	RegAsm.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3600	RegAsm.exe
3600	RegAsm.exe
3600	RegAsm.exe
3600	RegAsm.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2928 wrote to memory of 1672	2928	3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe	83
PID 2928 wrote to memory of 1672	2928	3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe	83
PID 2928 wrote to memory of 1672	2928	3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe	83
PID 2928 wrote to memory of 3600	2928	3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe	84
PID 2928 wrote to memory of 3600	2928	3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe	84
PID 2928 wrote to memory of 3600	2928	3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe	84
PID 2928 wrote to memory of 3600	2928	3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe	84
PID 2928 wrote to memory of 3600	2928	3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe	84
PID 2928 wrote to memory of 3600	2928	3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe	84
PID 2928 wrote to memory of 3600	2928	3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe	84
PID 2928 wrote to memory of 3600	2928	3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe	84
PID 2928 wrote to memory of 3600	2928	3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe	84
PID 2928 wrote to memory of 3600	2928	3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe	84

C:\Users\Admin\AppData\Local\Temp\3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe
"C:\Users\Admin\AppData\Local\Temp\3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2928
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:1672
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Browser Information Discovery

Query Registry

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2928-0-0x0000000074BEE000-0x0000000074BEF000-memory.dmp

Filesize
4KB

Download
memory/2928-1-0x00000000000D0000-0x0000000000138000-memory.dmp

Filesize
416KB

Download
memory/2928-11-0x0000000074BE0000-0x0000000075390000-memory.dmp

Filesize
7.7MB

Download
memory/2928-37-0x0000000074BE0000-0x0000000075390000-memory.dmp

Filesize
7.7MB

Download
memory/3600-3-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/3600-6-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/3600-8-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/3600-18-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/3600-19-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/3600-20-0x0000000022530000-0x000000002278F000-memory.dmp

Filesize
2.4MB

Download
memory/3600-35-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/3600-36-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing