vidar | 177b169c97b34e1deb2a890e7a2d9be0237cc5542771264aadb5cec35421883a

General

Target

eufive_20211117-111753.exe
Size

601KB
MD5

e008d51cfdd5956c293422497e4753c1
SHA1

eccaee775c52ba8cc268afd05358cc6cefb12912
SHA256

177b169c97b34e1deb2a890e7a2d9be0237cc5542771264aadb5cec35421883a
SHA512

5775cb0a3aac7812d95537b65297167afccbf33e4dd54405f6147cba9b02b1568130a6a08259dfed403994e416280521dbfd01ef449763390bacdc7513ad2236

Score

10^/10

vidar 824 discovery spyware stealer

Malware Config

Extracted

Family

vidar

Version

48.6

Botnet

824

C2

https://mastodon.online/@valhalla

https://koyu.space/@valhalla

Attributes

profile_id
824

Signatures

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar

Vidar Stealer 2 IoCs

stealer

resource	yara_rule
behavioral2/memory/3720-119-0x00000000022B0000-0x0000000002385000-memory.dmp	family_vidar
behavioral2/memory/3720-120-0x0000000000400000-0x00000000004D8000-memory.dmp	family_vidar

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
3720	eufive_20211117-111753.exe
3720	eufive_20211117-111753.exe

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
T1081
Accesses 2FA software files, possible credential harvesting 2 TTPs
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

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	eufive_20211117-111753.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	eufive_20211117-111753.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3532	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
1164	taskkill.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3720	eufive_20211117-111753.exe
3720	eufive_20211117-111753.exe
3720	eufive_20211117-111753.exe
3720	eufive_20211117-111753.exe
3720	eufive_20211117-111753.exe
3720	eufive_20211117-111753.exe
3720	eufive_20211117-111753.exe
3720	eufive_20211117-111753.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1164	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3720 wrote to memory of 2960	3720	eufive_20211117-111753.exe	69
PID 3720 wrote to memory of 2960	3720	eufive_20211117-111753.exe	69
PID 3720 wrote to memory of 2960	3720	eufive_20211117-111753.exe	69
PID 2960 wrote to memory of 1164	2960	cmd.exe	71
PID 2960 wrote to memory of 1164	2960	cmd.exe	71
PID 2960 wrote to memory of 1164	2960	cmd.exe	71
PID 2960 wrote to memory of 3532	2960	cmd.exe	73
PID 2960 wrote to memory of 3532	2960	cmd.exe	73
PID 2960 wrote to memory of 3532	2960	cmd.exe	73

C:\Users\Admin\AppData\Local\Temp\eufive_20211117-111753.exe
"C:\Users\Admin\AppData\Local\Temp\eufive_20211117-111753.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3720
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im eufive_20211117-111753.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\eufive_20211117-111753.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2960
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im eufive_20211117-111753.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1164
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:3532

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

3

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/3720-118-0x0000000000550000-0x000000000069A000-memory.dmp

Filesize
1.3MB

Download
memory/3720-120-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/3720-119-0x00000000022B0000-0x0000000002385000-memory.dmp

Filesize
852KB

Download

Analysis

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