Analysis

  • max time kernel
    144s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/03/2023, 12:51

General

  • Target

    tmp.exe

  • Size

    430KB

  • MD5

    c310d4e479589d94b6f948a43624d3e0

  • SHA1

    46110b16dfea473ed09db50c9688b47020bc39b0

  • SHA256

    4720007dc50c1eda6f4aaf5ba8eeebb276ecde68bbf1a146fce899aa2b0c0c1c

  • SHA512

    4c39789d30d6e7c543ef8831a73e017856b08219117123ee5f65636f60819f53cccbdff436f50abb75236b7e73a8ed3a6994d2c63335a382779772fb476071cd

  • SSDEEP

    6144:SXa7AHRZ/jjmEhQjolEQZu7k0U4ETThwMdCl24c8rufdhzSxucWJBM:ia7WRxjjmEl0k0wThwMsM7rmIckq

Malware Config

Extracted

Family

vidar

Version

3

Botnet

2548f166286a0b36dbfd9f8a1ac09311

C2

https://t.me/zaskullz

https://steamcommunity.com/profiles/76561199486572327

http://135.181.87.234:80

Attributes
  • profile_id_v2

    2548f166286a0b36dbfd9f8a1ac09311

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Loads dropped DLL 2 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Suspicious use of SetThreadContext 1 IoCs
  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1068
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
      2⤵
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:1056
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1056 -s 1832
        3⤵
        • Program crash
        PID:3788
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1056 -ip 1056
    1⤵
      PID:4712

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\ProgramData\mozglue.dll

            Filesize

            593KB

            MD5

            c8fd9be83bc728cc04beffafc2907fe9

            SHA1

            95ab9f701e0024cedfbd312bcfe4e726744c4f2e

            SHA256

            ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

            SHA512

            fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

          • C:\ProgramData\nss3.dll

            Filesize

            2.0MB

            MD5

            1cc453cdf74f31e4d913ff9c10acdde2

            SHA1

            6e85eae544d6e965f15fa5c39700fa7202f3aafe

            SHA256

            ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

            SHA512

            dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

          • memory/1056-134-0x0000000000400000-0x0000000000471000-memory.dmp

            Filesize

            452KB

          • memory/1056-136-0x0000000000400000-0x0000000000471000-memory.dmp

            Filesize

            452KB

          • memory/1056-137-0x0000000000400000-0x0000000000471000-memory.dmp

            Filesize

            452KB

          • memory/1056-138-0x0000000000400000-0x0000000000471000-memory.dmp

            Filesize

            452KB

          • memory/1056-148-0x0000000051100000-0x00000000511F3000-memory.dmp

            Filesize

            972KB

          • memory/1056-216-0x0000000000400000-0x0000000000471000-memory.dmp

            Filesize

            452KB

          • memory/1056-217-0x0000000000400000-0x0000000000471000-memory.dmp

            Filesize

            452KB

          • memory/1068-133-0x0000000000470000-0x00000000004E2000-memory.dmp

            Filesize

            456KB

          • memory/1068-135-0x0000000004DB0000-0x0000000004DC0000-memory.dmp

            Filesize

            64KB

          • memory/1068-218-0x0000000004DB0000-0x0000000004DC0000-memory.dmp

            Filesize

            64KB