vidar | bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96

General

Target

file.exe
Size

401KB
MD5

5f1ea69f876e6c0b3f52c49cb56a5933
SHA1

25efa25249943f752eb980d33a9945f126310fa9
SHA256

bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96
SHA512

b6636579c7ef7b18e65bbf331527e3069c3b3c403fc21744f1692f1f882dc2e67ebc4c003ca857b2fa460fcc9e078f6c4dbbb1205d232f198e8046c7036dd2b3
SSDEEP

12288:DuSEc/XKSAotoNQQGqlWAmyF0x3EGXY0kD:DIcPKTotHQ5Wzp5SD

Score

10^/10

vidar b438a316528fda660b5e4e28911b77a1 credential_access discovery spyware stealer

Malware Config

Extracted

Family

vidar

Version

11

Botnet

b438a316528fda660b5e4e28911b77a1

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/2308-4-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/2308-9-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/2308-11-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/2308-20-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/2308-21-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/2308-37-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/2308-38-0x0000000000400000-0x0000000000675000-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 2264 set thread context of 2308	2264	file.exe	83

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
2308	RegAsm.exe
2308	RegAsm.exe
2308	RegAsm.exe
2308	RegAsm.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2264 wrote to memory of 2308	2264	file.exe	83
PID 2264 wrote to memory of 2308	2264	file.exe	83
PID 2264 wrote to memory of 2308	2264	file.exe	83
PID 2264 wrote to memory of 2308	2264	file.exe	83
PID 2264 wrote to memory of 2308	2264	file.exe	83
PID 2264 wrote to memory of 2308	2264	file.exe	83
PID 2264 wrote to memory of 2308	2264	file.exe	83
PID 2264 wrote to memory of 2308	2264	file.exe	83
PID 2264 wrote to memory of 2308	2264	file.exe	83
PID 2264 wrote to memory of 2308	2264	file.exe	83

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:2264
- 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:2308

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/2264-0-0x000000007491E000-0x000000007491F000-memory.dmp

Filesize
4KB

Download
memory/2264-1-0x00000000005A0000-0x0000000000608000-memory.dmp

Filesize
416KB

Download
memory/2264-2-0x0000000074910000-0x00000000750C0000-memory.dmp

Filesize
7.7MB

Download
memory/2264-5-0x0000000074910000-0x00000000750C0000-memory.dmp

Filesize
7.7MB

Download
memory/2264-7-0x0000000074910000-0x00000000750C0000-memory.dmp

Filesize
7.7MB

Download
memory/2308-11-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2308-9-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2308-4-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2308-20-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2308-21-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2308-22-0x00000000228B0000-0x0000000022B0F000-memory.dmp

Filesize
2.4MB

Download
memory/2308-37-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2308-38-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download

Analysis

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