vidar | 3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5

General

Target

file.exe
Size

403KB
MD5

1992187cfdd036a0eecb8f5ca9340cc0
SHA1

0aac664d9c06f47a970f88389401a14705337121
SHA256

3a82cb00938ffbdf09c91c39120f57054df7573950701ce8be86aec0342bc1b5
SHA512

37651fc773621566790569ec76af4a7e66f50472a7be6ba11575592514e0d11f4ff8cc1c83c5d3ebcde3c15ef942becbb8e71f763398fd5ffaa74c78a0379b92
SSDEEP

12288:9TF2nYPwGYGzePmnWkMkBR0pwvxT613EO:9TF2YPwGleYMkBRVZ6Rt

Score

10^/10

vidar 4b74261d834413e886f920a1e9dc5b33 credential_access 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 8 IoCs

stealer

resource	yara_rule
behavioral1/memory/2356-8-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral1/memory/2356-11-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral1/memory/2356-7-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral1/memory/2356-6-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral1/memory/2356-14-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral1/memory/2356-16-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral1/memory/2356-20-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral1/memory/2356-21-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
credential_access stealer

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 2480 set thread context of 2356	2480	file.exe	32

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2792	timeout.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2356	RegAsm.exe
2356	RegAsm.exe
2356	RegAsm.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2480 wrote to memory of 2356	2480	file.exe	32
PID 2480 wrote to memory of 2356	2480	file.exe	32
PID 2480 wrote to memory of 2356	2480	file.exe	32
PID 2480 wrote to memory of 2356	2480	file.exe	32
PID 2480 wrote to memory of 2356	2480	file.exe	32
PID 2480 wrote to memory of 2356	2480	file.exe	32
PID 2480 wrote to memory of 2356	2480	file.exe	32
PID 2480 wrote to memory of 2356	2480	file.exe	32
PID 2480 wrote to memory of 2356	2480	file.exe	32
PID 2480 wrote to memory of 2356	2480	file.exe	32
PID 2480 wrote to memory of 2356	2480	file.exe	32
PID 2480 wrote to memory of 2356	2480	file.exe	32
PID 2480 wrote to memory of 2356	2480	file.exe	32
PID 2480 wrote to memory of 2356	2480	file.exe	32
PID 2356 wrote to memory of 2080	2356	RegAsm.exe	35
PID 2356 wrote to memory of 2080	2356	RegAsm.exe	35
PID 2356 wrote to memory of 2080	2356	RegAsm.exe	35
PID 2356 wrote to memory of 2080	2356	RegAsm.exe	35
PID 2080 wrote to memory of 2792	2080	cmd.exe	37
PID 2080 wrote to memory of 2792	2080	cmd.exe	37
PID 2080 wrote to memory of 2792	2080	cmd.exe	37
PID 2080 wrote to memory of 2792	2080	cmd.exe	37

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:2480
- 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
  - Suspicious use of WriteProcessMemory
  PID:2356
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" & rd /s /q "C:\ProgramData\CBAKJKJJJECF" & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2080
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:2792

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

2

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/2356-5-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/2356-14-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/2356-3-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/2356-8-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/2356-21-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/2356-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2356-20-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/2356-7-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/2356-11-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/2356-4-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/2356-6-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/2356-16-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/2480-17-0x0000000074A10000-0x00000000750FE000-memory.dmp

Filesize
6.9MB

Download
memory/2480-12-0x0000000074A10000-0x00000000750FE000-memory.dmp

Filesize
6.9MB

Download
memory/2480-1-0x0000000000330000-0x0000000000398000-memory.dmp

Filesize
416KB

Download
memory/2480-0-0x0000000074A1E000-0x0000000074A1F000-memory.dmp

Filesize
4KB

Download

Analysis

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