vidar | d06e9b26713ef8cb240b46a94b545ecdc40e811d6c520f7fa0d837d94e2a53fc

Analysis

max time kernel
117s
max time network
127s
platform
windows7_x64
resource
win7-en-20211208
submitted
07/01/2022, 07:13

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General

Target
a47b25663322770ace0d11019b329d42.exe
Size 362KB
Sample220107-h13zaaccgl
SHA256 d06e9b26713ef8cb240b46a94b545ecdc40e811d6c520f7fa0d837d94e2a53fc
MD5 a47b25663322770ace0d11019b329d42
SHA1 f3cc9af1726d1c31e3e62c2ce5295e1fde7f666d
SHA512 5e03bf18e8a03b82e176408453bb24f2cb9778d3ce0993b2c1d6a176dd8523bd4ecc7fb990e5cf78a4c81fc7792dc46015dd31460d5afb66020743feaa416e0d
MD5 SHA1 SHA512

Score

10^/10

vidar 869 discovery spyware stealer suricata

Malware Config

Extracted

Family

vidar

Version

49.2

Botnet

https://mstdn.social/@kipriauk9
https://qoto.org/@kipriauk8

Attributes

profile_id
869

Signatures

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata
suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload
suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload
suricata
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
suricata

Vidar Stealer 2 IoCs

stealer

resource	yara_rule
behavioral1/memory/1376-71-0x0000000002330000-0x0000000002408000-memory.dmp	family_vidar
behavioral1/memory/1376-72-0x0000000000400000-0x0000000000613000-memory.dmp	family_vidar

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
1376	0955784703.exe
1144	4497010346.exe

Deletes itself 1 IoCs

pid	Process
1364	cmd.exe

Loads dropped DLL 7 IoCs

pid	Process
1652	cmd.exe
1652	cmd.exe
1976	cmd.exe
1376	0955784703.exe
1376	0955784703.exe
1376	0955784703.exe
1376	0955784703.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
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
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

autoit_exe 3 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x00070000000125f3-68.dat	autoit_exe
behavioral1/files/0x00070000000125f3-65.dat	autoit_exe
behavioral1/files/0x00070000000125f3-66.dat	autoit_exe

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	0955784703.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	0955784703.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1372	timeout.exe

Kills process with taskkill 2 IoCs

evasion

pid	Process
1476	taskkill.exe
320	taskkill.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1376	0955784703.exe
1376	0955784703.exe
1376	0955784703.exe
1376	0955784703.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1476	taskkill.exe
Token: SeDebugPrivilege	320	taskkill.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 1844 wrote to memory of 1652	1844	a47b25663322770ace0d11019b329d42.exe	29
PID 1844 wrote to memory of 1652	1844	a47b25663322770ace0d11019b329d42.exe	29
PID 1844 wrote to memory of 1652	1844	a47b25663322770ace0d11019b329d42.exe	29
PID 1844 wrote to memory of 1652	1844	a47b25663322770ace0d11019b329d42.exe	29
PID 1652 wrote to memory of 1376	1652	cmd.exe	31
PID 1652 wrote to memory of 1376	1652	cmd.exe	31
PID 1652 wrote to memory of 1376	1652	cmd.exe	31
PID 1652 wrote to memory of 1376	1652	cmd.exe	31
PID 1844 wrote to memory of 1976	1844	a47b25663322770ace0d11019b329d42.exe	32
PID 1844 wrote to memory of 1976	1844	a47b25663322770ace0d11019b329d42.exe	32
PID 1844 wrote to memory of 1976	1844	a47b25663322770ace0d11019b329d42.exe	32
PID 1844 wrote to memory of 1976	1844	a47b25663322770ace0d11019b329d42.exe	32
PID 1976 wrote to memory of 1144	1976	cmd.exe	34
PID 1976 wrote to memory of 1144	1976	cmd.exe	34
PID 1976 wrote to memory of 1144	1976	cmd.exe	34
PID 1976 wrote to memory of 1144	1976	cmd.exe	34
PID 1376 wrote to memory of 568	1376	0955784703.exe	36
PID 1376 wrote to memory of 568	1376	0955784703.exe	36
PID 1376 wrote to memory of 568	1376	0955784703.exe	36
PID 1376 wrote to memory of 568	1376	0955784703.exe	36
PID 568 wrote to memory of 1476	568	cmd.exe	38
PID 568 wrote to memory of 1476	568	cmd.exe	38
PID 568 wrote to memory of 1476	568	cmd.exe	38
PID 568 wrote to memory of 1476	568	cmd.exe	38
PID 568 wrote to memory of 1372	568	cmd.exe	40
PID 568 wrote to memory of 1372	568	cmd.exe	40
PID 568 wrote to memory of 1372	568	cmd.exe	40
PID 568 wrote to memory of 1372	568	cmd.exe	40
PID 1844 wrote to memory of 1364	1844	a47b25663322770ace0d11019b329d42.exe	43
PID 1844 wrote to memory of 1364	1844	a47b25663322770ace0d11019b329d42.exe	43
PID 1844 wrote to memory of 1364	1844	a47b25663322770ace0d11019b329d42.exe	43
PID 1844 wrote to memory of 1364	1844	a47b25663322770ace0d11019b329d42.exe	43
PID 1364 wrote to memory of 320	1364	cmd.exe	45
PID 1364 wrote to memory of 320	1364	cmd.exe	45
PID 1364 wrote to memory of 320	1364	cmd.exe	45
PID 1364 wrote to memory of 320	1364	cmd.exe	45

C:\Users\Admin\AppData\Local\Temp\a47b25663322770ace0d11019b329d42.exe
"C:\Users\Admin\AppData\Local\Temp\a47b25663322770ace0d11019b329d42.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1844
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\0955784703.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1652
- - C:\Users\Admin\AppData\Local\Temp\0955784703.exe
    "C:\Users\Admin\AppData\Local\Temp\0955784703.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1376
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im 0955784703.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\0955784703.exe" & del C:\ProgramData\*.dll & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:568
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im 0955784703.exe /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1476
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 6
        5⤵
        Delays execution with timeout.exe
        
        PID:1372
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\4497010346.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1976
- - C:\Users\Admin\AppData\Local\Temp\4497010346.exe
    "C:\Users\Admin\AppData\Local\Temp\4497010346.exe"
    3⤵
    - Executes dropped EXE
    PID:1144
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "a47b25663322770ace0d11019b329d42.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\a47b25663322770ace0d11019b329d42.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1364
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "a47b25663322770ace0d11019b329d42.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:320

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

memory/1376-72-0x0000000000400000-0x0000000000613000-memory.dmp

Download

memory/1376-71-0x0000000002330000-0x0000000002408000-memory.dmp

Download

memory/1376-63-0x0000000000220000-0x0000000000221000-memory.dmp

Download

memory/1844-53-0x00000000002A8000-0x00000000002C8000-memory.dmp

Download

memory/1844-56-0x0000000000400000-0x0000000000470000-memory.dmp

Download

memory/1844-55-0x0000000000470000-0x00000000004A8000-memory.dmp

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memory/1844-54-0x0000000075341000-0x0000000075343000-memory.dmp

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