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Analysis

  • max time kernel
    60s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/12/2022, 17:48

General

  • Target

    file.exe

  • Size

    336KB

  • MD5

    6dc8116e251405d1a7f69f0c732adec6

  • SHA1

    da0a9831cd4674b70441d259984e67333e786a1c

  • SHA256

    ea12ac3067417f9ecc1f666318e1f063e8ddc74ef6fb83162ba68c1d6819df21

  • SHA512

    8f06175910feb1d9b9a8a091aa554bbef8b7edf203b7eadc841c4b22318eca2b821421b3110b658bf5438dee83e6d829e463b3381327ec66c8a4b31e23e368f3

  • SSDEEP

    6144:HLjUsW95K5nGbMjsqs/pCk9ybVqzE3JgxRmi3tm:HcsW956nQMjsykUbgzEZuki3tm

Malware Config

Extracted

Family

vidar

Version

1.7

Botnet

24

C2

https://t.me/robloxblackl

https://steamcommunity.com/profiles/76561199458928097

Attributes
  • profile_id

    24

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • 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
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2500
    • C:\ProgramData\75522150812027567162.exe
      "C:\ProgramData\75522150812027567162.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3460
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:408
    • 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⤵
      • Suspicious use of WriteProcessMemory
      PID:980
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 6
        3⤵
        • Delays execution with timeout.exe
        PID:1260
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2500 -s 660
      2⤵
      • Program crash
      PID:1252
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 2500 -ip 2500
    1⤵
      PID:1392

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\75522150812027567162.exe

      Filesize

      920KB

      MD5

      73a457017b7a3e84e3ff08504e345b28

      SHA1

      fabd5297d5b6875bb7513ee2c2ea36745d76b804

      SHA256

      08ec83cf551c99e6259bb3200766c3c5bd862fe0856dbf324256454fd9e922e9

      SHA512

      fb534234b2466f0920ac8ad3c283056c1df328e814b4b71460c4e3cbf1529af9c81bb1228a4f0b564e0e4ecd592cdc03f635b97640c7ec6a269d4662fed9dc26

    • C:\ProgramData\75522150812027567162.exe

      Filesize

      920KB

      MD5

      73a457017b7a3e84e3ff08504e345b28

      SHA1

      fabd5297d5b6875bb7513ee2c2ea36745d76b804

      SHA256

      08ec83cf551c99e6259bb3200766c3c5bd862fe0856dbf324256454fd9e922e9

      SHA512

      fb534234b2466f0920ac8ad3c283056c1df328e814b4b71460c4e3cbf1529af9c81bb1228a4f0b564e0e4ecd592cdc03f635b97640c7ec6a269d4662fed9dc26

    • C:\ProgramData\mozglue.dll

      Filesize

      133KB

      MD5

      8f73c08a9660691143661bf7332c3c27

      SHA1

      37fa65dd737c50fda710fdbde89e51374d0c204a

      SHA256

      3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

      SHA512

      0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

    • C:\ProgramData\nss3.dll

      Filesize

      1.2MB

      MD5

      bfac4e3c5908856ba17d41edcd455a51

      SHA1

      8eec7e888767aa9e4cca8ff246eb2aacb9170428

      SHA256

      e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

      SHA512

      2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

    • memory/408-170-0x000000000A340000-0x000000000A3A6000-memory.dmp

      Filesize

      408KB

    • memory/408-169-0x0000000007880000-0x000000000788A000-memory.dmp

      Filesize

      40KB

    • memory/408-168-0x00000000076E0000-0x0000000007772000-memory.dmp

      Filesize

      584KB

    • memory/408-167-0x0000000007B90000-0x0000000008134000-memory.dmp

      Filesize

      5.6MB

    • memory/408-166-0x0000000000400000-0x000000000047A000-memory.dmp

      Filesize

      488KB

    • memory/2500-135-0x0000000060900000-0x0000000060992000-memory.dmp

      Filesize

      584KB

    • memory/2500-164-0x0000000000400000-0x0000000000477000-memory.dmp

      Filesize

      476KB

    • memory/2500-133-0x00000000005F0000-0x000000000063B000-memory.dmp

      Filesize

      300KB

    • memory/2500-134-0x0000000000400000-0x0000000000477000-memory.dmp

      Filesize

      476KB

    • memory/2500-157-0x0000000000400000-0x0000000000477000-memory.dmp

      Filesize

      476KB

    • memory/2500-156-0x00000000004A9000-0x00000000004D6000-memory.dmp

      Filesize

      180KB

    • memory/2500-132-0x00000000004A9000-0x00000000004D6000-memory.dmp

      Filesize

      180KB

    • memory/3460-163-0x0000000000B00000-0x0000000000BEA000-memory.dmp

      Filesize

      936KB