Analysis

  • max time kernel
    56s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    14-11-2022 20:57

General

  • Target

    file.exe

  • Size

    325KB

  • MD5

    91dcf98a1a0b188cbce61dc0b02af908

  • SHA1

    44dc2cd9ffd68e66309e03297aeac6e07a102e2c

  • SHA256

    a07bcdd42890c8ceba1f103dd382f977f326f646b9361528ce6eb89cbbeabce5

  • SHA512

    3c7ac8138ad9a7b6123dcd6adfa5c8986740c7bbc2d7c89abdf928f05b12c9c8b05939a84a07f71aff595659b3266bb3f730e49b6aa29267d3dcc6c2072a11cb

  • SSDEEP

    6144:ylF/Ld/H3e07VGl8SA1p5/DNlSnhNoxI5YTsP4Ha:ylZp/H3RcrAHdEmG5OP

Malware Config

Extracted

Family

vidar

Version

55.7

Botnet

937

C2

https://t.me/deadftx

https://www.ultimate-guitar.com/u/smbfupkuhrgc1

Attributes
  • profile_id

    937

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Deletes itself 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 1 IoCs
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1768
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1128
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 6
        3⤵
        • Delays execution with timeout.exe
        PID:1980

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • \ProgramData\mozglue.dll
    Filesize

    593KB

    MD5

    c8fd9be83bc728cc04beffafc2907fe9

    SHA1

    95ab9f701e0024cedfbd312bcfe4e726744c4f2e

    SHA256

    ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

    SHA512

    fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

  • \ProgramData\nss3.dll
    Filesize

    2.0MB

    MD5

    1cc453cdf74f31e4d913ff9c10acdde2

    SHA1

    6e85eae544d6e965f15fa5c39700fa7202f3aafe

    SHA256

    ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

    SHA512

    dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

  • memory/1128-80-0x0000000000000000-mapping.dmp
  • memory/1768-56-0x0000000075931000-0x0000000075933000-memory.dmp
    Filesize

    8KB

  • memory/1768-58-0x000000000097E000-0x00000000009AA000-memory.dmp
    Filesize

    176KB

  • memory/1768-59-0x0000000000400000-0x0000000000854000-memory.dmp
    Filesize

    4.3MB

  • memory/1768-60-0x0000000061E00000-0x0000000061EF3000-memory.dmp
    Filesize

    972KB

  • memory/1768-54-0x000000000097E000-0x00000000009AA000-memory.dmp
    Filesize

    176KB

  • memory/1768-57-0x0000000000400000-0x0000000000854000-memory.dmp
    Filesize

    4.3MB

  • memory/1768-55-0x0000000000220000-0x000000000026A000-memory.dmp
    Filesize

    296KB

  • memory/1768-81-0x000000000097E000-0x00000000009AA000-memory.dmp
    Filesize

    176KB

  • memory/1768-82-0x0000000000400000-0x0000000000854000-memory.dmp
    Filesize

    4.3MB

  • memory/1980-83-0x0000000000000000-mapping.dmp