Analysis

  • max time kernel
    297s
  • max time network
    296s
  • platform
    windows10-1703_x64
  • resource
    win10-20231215-en
  • resource tags

    arch:x64arch:x86image:win10-20231215-enlocale:en-usos:windows10-1703-x64system
  • submitted
    28/01/2024, 22:25

General

  • Target
    bd3399d4e84992f425f2b4b585bb0a5bbb28cc97e48cd6e34c86e0587c916776.exe
  • Size 733KB
  • Sample240128-2b6tesbec8
  • SHA256 bd3399d4e84992f425f2b4b585bb0a5bbb28cc97e48cd6e34c86e0587c916776
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • djvu

C2
  • http://habrafa.com/test1/get.php

Attributes
  • extension

    .cdpo

  • offline_id

    Bn3q97hwLouKbhkQRNO4SeV07gjdEQVm8NKhg0t1

  • payload_url

    http://brusuax.com/dl/build2.exe

    http://habrafa.com/files/1/build3.exe

  • ransomnote

    ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-FCWSCsjEWS Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0844OSkw

rsa_pubkey.plain

Extracted

Family
  • vidar

Version
  • 7.5

Botnet
  • e7447dc405edc4690f5920bdb056364f

C2
  • https://t.me/bogotatg

  • https://steamcommunity.com/profiles/76561199621829149

Attributes
  • profile_id_v2

    e7447dc405edc4690f5920bdb056364f

  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 11_3) Chrome/90.0.4430.93 Safari/537.36 Vivaldi/3.7

Signatures

  • Detect Vidar Stealer 5 IoCs
  • Detected Djvu ransomware 10 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Executes dropped EXE 12 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 8 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bd3399d4e84992f425f2b4b585bb0a5bbb28cc97e48cd6e34c86e0587c916776.exe
    "C:\Users\Admin\AppData\Local\Temp\bd3399d4e84992f425f2b4b585bb0a5bbb28cc97e48cd6e34c86e0587c916776.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:240
    • C:\Users\Admin\AppData\Local\Temp\bd3399d4e84992f425f2b4b585bb0a5bbb28cc97e48cd6e34c86e0587c916776.exe
      "C:\Users\Admin\AppData\Local\Temp\bd3399d4e84992f425f2b4b585bb0a5bbb28cc97e48cd6e34c86e0587c916776.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4572
      • C:\Users\Admin\AppData\Local\Temp\bd3399d4e84992f425f2b4b585bb0a5bbb28cc97e48cd6e34c86e0587c916776.exe
        "C:\Users\Admin\AppData\Local\Temp\bd3399d4e84992f425f2b4b585bb0a5bbb28cc97e48cd6e34c86e0587c916776.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4948
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\f47ab361-04b9-4f5e-9077-66818e179de6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4732
  • C:\Users\Admin\AppData\Local\Temp\bd3399d4e84992f425f2b4b585bb0a5bbb28cc97e48cd6e34c86e0587c916776.exe
    "C:\Users\Admin\AppData\Local\Temp\bd3399d4e84992f425f2b4b585bb0a5bbb28cc97e48cd6e34c86e0587c916776.exe" --Admin IsNotAutoStart IsNotTask
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1328
    • C:\Users\Admin\AppData\Local\a5fdce79-cdb2-4558-858a-b0a9a1793d1f\build2.exe
      "C:\Users\Admin\AppData\Local\a5fdce79-cdb2-4558-858a-b0a9a1793d1f\build2.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:2632
    • C:\Users\Admin\AppData\Local\a5fdce79-cdb2-4558-858a-b0a9a1793d1f\build3.exe
      "C:\Users\Admin\AppData\Local\a5fdce79-cdb2-4558-858a-b0a9a1793d1f\build3.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:3592
      • C:\Users\Admin\AppData\Local\a5fdce79-cdb2-4558-858a-b0a9a1793d1f\build3.exe
        "C:\Users\Admin\AppData\Local\a5fdce79-cdb2-4558-858a-b0a9a1793d1f\build3.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:2352
  • C:\Users\Admin\AppData\Local\a5fdce79-cdb2-4558-858a-b0a9a1793d1f\build2.exe
    "C:\Users\Admin\AppData\Local\a5fdce79-cdb2-4558-858a-b0a9a1793d1f\build2.exe"
    1⤵
    • Executes dropped EXE
    PID:1324
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1324 -s 2088
      2⤵
      • Program crash
      PID:1036
  • C:\Windows\SysWOW64\schtasks.exe
    /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
    1⤵
    • Creates scheduled task(s)
    PID:3340
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3988
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:4232
  • C:\Windows\SysWOW64\schtasks.exe
    /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
    1⤵
    • Creates scheduled task(s)
    PID:380
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    PID:2908
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:2400
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    PID:1404
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:2144
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    PID:3160
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:4964

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
        • Size 1KB
        • SHA256 c5dff2b8854fb9ed981ebdb1d6b621cf681bd1ac18ac44b14c138cd05352365b
        • MD5 SHA1 SHA512

        CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
        • Size 724B
        • SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
        • MD5 SHA1 SHA512

        24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
        • Size 410B
        • SHA256 ae0fb8de6339849ed0ee3b6df18fdb136c19550896d2e6956eba8a90ca6592bb
        • MD5 SHA1 SHA512

        CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
        • Size 392B
        • SHA256 98669c9b1e00339a25ac7e6d2cd8c07813f04832a5f78bde6574685e428abe47
        • MD5 SHA1 SHA512

        build2.exe

        • Path C:\Users\Admin\AppData\Local\a5fdce79-cdb2-4558-858a-b0a9a1793d1f\build2.exe
        • Size 53KB
        • SHA256 a6638935a1efef6ce4d8857710f7082304ec46213c3b828fb626549a36920949
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\a5fdce79-cdb2-4558-858a-b0a9a1793d1f\build2.exe
        • Size 1KB
        • SHA256 c74630158cc58b785a874e53fefcf7c88d5f9db37e716052f63d5bdb527fc17d
        • MD5 SHA1 SHA512

        build2.exe

        • Path C:\Users\Admin\AppData\Local\a5fdce79-cdb2-4558-858a-b0a9a1793d1f\build2.exe
        • Size 18KB
        • SHA256 15837aacefe8f2bc5d0db0a5dc7446b7d5930e021153b47ba0259fbfb35b028a
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\a5fdce79-cdb2-4558-858a-b0a9a1793d1f\build3.exe
        • Size 36KB
        • SHA256 a609bccf80c89b4a526973b55792881b5c193865ff651ee2aafc04fbc5dfad1c
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\a5fdce79-cdb2-4558-858a-b0a9a1793d1f\build3.exe
        • Size 1KB
        • SHA256 722325dfc7e0a3d8b9c5bcf978e54f9a90a83ffa5d14372a51dc7c3609fee061
        • MD5 SHA1 SHA512

        build3.exe

        • Path C:\Users\Admin\AppData\Local\a5fdce79-cdb2-4558-858a-b0a9a1793d1f\build3.exe
        • Size 106KB
        • SHA256 2256ff6e793c4b281e9be43a5bdde9735ffd8852bb76af37a6a419cbc323d8ad
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 63KB
        • SHA256 d1f017bad005734ec303f39fe7a264eeaa53db12e4a92ea3d67f7c7655d7b2c9
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 146KB
        • SHA256 6091b2a7a8bb10c6b65a15654dca4e58af4118135db5542cf58a0cc6c708dbc5
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 68KB
        • SHA256 53ec394b4b1575aa89ad75984514eafb65e786060c6f218551d6fdf0e6705fba
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 299KB
        • SHA256 fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408
        • MD5 SHA1 SHA512 SSDEEP

        memory/240-3-0x0000000004910000-0x0000000004A2B000-memory.dmp

        memory/240-1-0x00000000030D0000-0x000000000316F000-memory.dmp

        memory/1324-47-0x0000000000400000-0x000000000063F000-memory.dmp

        memory/1324-66-0x0000000000400000-0x000000000063F000-memory.dmp

        memory/1324-52-0x0000000000400000-0x000000000063F000-memory.dmp

        memory/1324-53-0x0000000000400000-0x000000000063F000-memory.dmp

        memory/1328-37-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1328-23-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1328-38-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1328-62-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1328-34-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1328-36-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1328-29-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1328-24-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1328-30-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1328-22-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1404-154-0x000000000083E000-0x000000000084E000-memory.dmp

        memory/2352-76-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/2352-78-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/2352-71-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/2632-51-0x00000000005B0000-0x00000000005DC000-memory.dmp

        memory/2632-50-0x00000000005F0000-0x00000000006F0000-memory.dmp

        memory/2908-127-0x000000000091E000-0x000000000092E000-memory.dmp

        memory/3160-180-0x0000000000B8E000-0x0000000000B9E000-memory.dmp

        memory/3592-74-0x0000000000AD0000-0x0000000000BD0000-memory.dmp

        memory/3592-75-0x00000000008E0000-0x00000000008E4000-memory.dmp

        memory/3988-104-0x000000000085A000-0x000000000086A000-memory.dmp

        memory/4572-17-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4572-2-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4572-4-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4572-6-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4572-5-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4948-20-0x0000000002CC0000-0x0000000002D56000-memory.dmp