vidar | bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96

General

Target

bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.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/2792-4-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/2792-11-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/2792-10-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/2792-20-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/2792-21-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/2792-37-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/2792-38-0x0000000000400000-0x0000000000675000-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 3980 set thread context of 2792	3980	bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.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	bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.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
2792	RegAsm.exe
2792	RegAsm.exe
2792	RegAsm.exe
2792	RegAsm.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 3980 wrote to memory of 920	3980	bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.exe	83
PID 3980 wrote to memory of 920	3980	bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.exe	83
PID 3980 wrote to memory of 920	3980	bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.exe	83
PID 3980 wrote to memory of 2792	3980	bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.exe	84
PID 3980 wrote to memory of 2792	3980	bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.exe	84
PID 3980 wrote to memory of 2792	3980	bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.exe	84
PID 3980 wrote to memory of 2792	3980	bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.exe	84
PID 3980 wrote to memory of 2792	3980	bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.exe	84
PID 3980 wrote to memory of 2792	3980	bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.exe	84
PID 3980 wrote to memory of 2792	3980	bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.exe	84
PID 3980 wrote to memory of 2792	3980	bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.exe	84
PID 3980 wrote to memory of 2792	3980	bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.exe	84
PID 3980 wrote to memory of 2792	3980	bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.exe	84

C:\Users\Admin\AppData\Local\Temp\bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.exe
"C:\Users\Admin\AppData\Local\Temp\bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3980
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:920
- 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:2792

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/2792-11-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2792-4-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2792-10-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2792-20-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2792-21-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2792-23-0x0000000022470000-0x00000000226CF000-memory.dmp

Filesize
2.4MB

Download
memory/2792-37-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2792-38-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/3980-1-0x0000000000290000-0x00000000002F8000-memory.dmp

Filesize
416KB

Download
memory/3980-2-0x0000000074F20000-0x00000000756D0000-memory.dmp

Filesize
7.7MB

Download
memory/3980-6-0x0000000074F20000-0x00000000756D0000-memory.dmp

Filesize
7.7MB

Download
memory/3980-7-0x0000000074F20000-0x00000000756D0000-memory.dmp

Filesize
7.7MB

Download
memory/3980-0-0x0000000074F2E000-0x0000000074F2F000-memory.dmp

Filesize
4KB

Download

Analysis

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