vidar | 4a16685ec6d408bafc872fac39012bb670ff7bba818a7af9f7dd411a383869dd

General

Target

file.exe
Size

283KB
MD5

257eb69581fd80827932ed434d32470f
SHA1

ef7f9f0b82f45fc93ca503f4eadd8e423bc94887
SHA256

4a16685ec6d408bafc872fac39012bb670ff7bba818a7af9f7dd411a383869dd
SHA512

2eb0f6cc296748dc15925881a6e8a5895be4639095cb2996e740512caba44022c8a3ef39c821f1ad048de2c2eb7b10a9e673a9e0f1667e0e64640ec31a1ee1e0
SSDEEP

6144:tQs0+jmxNThrvyoRUp4B1Pw3A0FWAtMql3EBdA9bPCp0uUfStm5zXT4htP6VYdWe:M+jOFxvVQ4rPw3A+WAtr3EPknfS9PKS3

Score

10^/10

vidar credential_access discovery spyware stealer

Malware Config

Extracted

Family

vidar

C2

https://t.me/afsgsdgqr4r

https://t.me/edm0d

https://steamcommunity.com/profiles/76561199768374681

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36 OPR/110.0.0.0

Signatures

Detect Vidar Stealer 7 IoCs

stealer

resource	yara_rule
behavioral2/memory/3840-4-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/3840-10-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/3840-9-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/3840-23-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/3840-24-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/3840-41-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/3840-42-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003
Downloads MZ/PE file
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 412 set thread context of 3840	412	file.exe	85

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	file.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
3840	RegAsm.exe
3840	RegAsm.exe
3840	RegAsm.exe
3840	RegAsm.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 412 wrote to memory of 3840	412	file.exe	85
PID 412 wrote to memory of 3840	412	file.exe	85
PID 412 wrote to memory of 3840	412	file.exe	85
PID 412 wrote to memory of 3840	412	file.exe	85
PID 412 wrote to memory of 3840	412	file.exe	85
PID 412 wrote to memory of 3840	412	file.exe	85
PID 412 wrote to memory of 3840	412	file.exe	85
PID 412 wrote to memory of 3840	412	file.exe	85
PID 412 wrote to memory of 3840	412	file.exe	85
PID 412 wrote to memory of 3840	412	file.exe	85

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:412
- 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:3840

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

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Downloads

memory/412-0-0x00000000752CE000-0x00000000752CF000-memory.dmp

Filesize
4KB

Download
memory/412-1-0x0000000000B40000-0x0000000000B8A000-memory.dmp

Filesize
296KB

Download
memory/412-13-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/412-43-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/3840-4-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/3840-10-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/3840-9-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/3840-23-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/3840-24-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/3840-26-0x0000000022980000-0x0000000022BDF000-memory.dmp

Filesize
2.4MB

Download
memory/3840-41-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/3840-42-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download

Analysis

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