Analysis

  • max time kernel
    121s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    03/10/2022, 16:13

General

  • Target
    c666b78567fa7265c9d83599673a6d89.exe
  • Size 255KB
  • Sample221003-tn3crsecd3
  • SHA256 5dd761dbc99ba7e46595a31facf46b2a2289815f2db21486959a2da57cc03700
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • vidar

Version
  • 54.9

Botnet
  • 517

C2
  • https://t.me/larsenup

  • https://ioc.exchange/@zebra54

Attributes
  • profile_id

    517

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • 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.

  • Suspicious use of SetThreadContext 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c666b78567fa7265c9d83599673a6d89.exe
    "C:\Users\Admin\AppData\Local\Temp\c666b78567fa7265c9d83599673a6d89.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1600
    • C:\Users\Admin\AppData\Local\Temp\c666b78567fa7265c9d83599673a6d89.exe
      "C:\Users\Admin\AppData\Local\Temp\c666b78567fa7265c9d83599673a6d89.exe"
      2⤵
      • Loads dropped DLL
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:1396

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        mozglue.dll

        • Path \ProgramData\mozglue.dll
        • Size 593KB
        • SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
        • MD5 SHA1 SHA512 SSDEEP

        nss3.dll

        • Path \ProgramData\nss3.dll
        • Size 2.0MB
        • SHA256 ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
        • MD5 SHA1 SHA512 SSDEEP

        memory/1396-54-0x0000000000400000-0x000000000045E000-memory.dmp

        memory/1396-59-0x00000000752B1000-0x00000000752B3000-memory.dmp

        memory/1396-60-0x0000000000400000-0x000000000045E000-memory.dmp

        memory/1396-61-0x0000000000400000-0x000000000045E000-memory.dmp

        memory/1396-62-0x0000000061E00000-0x0000000061EF3000-memory.dmp

        memory/1396-82-0x0000000000400000-0x000000000045E000-memory.dmp

        memory/1600-56-0x000000000028D000-0x00000000002B9000-memory.dmp

        memory/1600-58-0x00000000005A0000-0x00000000005EA000-memory.dmp