Analysis

  • max time kernel
    152s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-05-2024 20:23

General

  • Target

    0a4517f2b2ffbf7c1dadffc3af69565c98baa1f9b0ad0946811ae8b95e124f98.exe

  • Size

    715KB

  • MD5

    045f054edf180dd0f0b3e0bc4ba2cde1

  • SHA1

    b63439fa1025ae39a561e29288572f59b529807b

  • SHA256

    0a4517f2b2ffbf7c1dadffc3af69565c98baa1f9b0ad0946811ae8b95e124f98

  • SHA512

    a7b0a6d242d36f84114e96e784cba75778b4b4c946de72f3ae79f30532cd931482623b042a7c07c49781c5c3c01a41644832f2c122569b5027e75414db97149a

  • SSDEEP

    12288:J6xf4IYTSNBzHVPHmy9iTqu0IFAfhLsI3aanLGi0G5dk/vfA4uxEiP9iRFRF4D2r:J6hYTSNBLVf8Tqu2LsIKaLGi0EdYfkRH

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test2/get.php

Attributes
  • extension

    .vehu

  • offline_id

    EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1

  • payload_url

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

    http://cajgtus.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. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. 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: 0872PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 16 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0a4517f2b2ffbf7c1dadffc3af69565c98baa1f9b0ad0946811ae8b95e124f98.exe
    "C:\Users\Admin\AppData\Local\Temp\0a4517f2b2ffbf7c1dadffc3af69565c98baa1f9b0ad0946811ae8b95e124f98.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3968
    • C:\Users\Admin\AppData\Local\Temp\0a4517f2b2ffbf7c1dadffc3af69565c98baa1f9b0ad0946811ae8b95e124f98.exe
      "C:\Users\Admin\AppData\Local\Temp\0a4517f2b2ffbf7c1dadffc3af69565c98baa1f9b0ad0946811ae8b95e124f98.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4424
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\50f7c260-3db1-441f-b13a-6d1750cf9ef7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4216
      • C:\Users\Admin\AppData\Local\Temp\0a4517f2b2ffbf7c1dadffc3af69565c98baa1f9b0ad0946811ae8b95e124f98.exe
        "C:\Users\Admin\AppData\Local\Temp\0a4517f2b2ffbf7c1dadffc3af69565c98baa1f9b0ad0946811ae8b95e124f98.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2912
        • C:\Users\Admin\AppData\Local\Temp\0a4517f2b2ffbf7c1dadffc3af69565c98baa1f9b0ad0946811ae8b95e124f98.exe
          "C:\Users\Admin\AppData\Local\Temp\0a4517f2b2ffbf7c1dadffc3af69565c98baa1f9b0ad0946811ae8b95e124f98.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4132
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1036 --field-trial-handle=1928,i,13242902252791919845,10377620236057253993,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3056

    Network

    MITRE ATT&CK Matrix ATT&CK v13

    Persistence

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Privilege Escalation

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Defense Evasion

    File and Directory Permissions Modification

    1
    T1222

    Modify Registry

    1
    T1112

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    2
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
      Filesize

      1KB

      MD5

      3bfb237d95f9c34465d50360f39b3ceb

      SHA1

      2cdee845ea6ebbd3cd0466b0eae4752842de86cc

      SHA256

      2ceaddb29268e6112e7aa95722894fb061238ad4e2b247ce23595609daa5eb8d

      SHA512

      da55bf0fd898acda5dfd2366a96d439807e502c763dca35c3a119c3ab45f6e3d821a1e3fd29858e333606ef0e822f3373b9cb8c41d95736131bb001ad5b6a16f

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
      Filesize

      724B

      MD5

      8202a1cd02e7d69597995cabbe881a12

      SHA1

      8858d9d934b7aa9330ee73de6c476acf19929ff6

      SHA256

      58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

      SHA512

      97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
      Filesize

      410B

      MD5

      85c91abadd6025205aed479111b51135

      SHA1

      6569bf2bccd027c8e18925f47ad42aefb86cc924

      SHA256

      1483035bbf3586d4f7db60e82fca7419b5aefdaa8b08ff68540628b9c6831193

      SHA512

      378678febab359eafdbea1567bbf4727dc9809e38a40b9ff63052f09df8224484749808255378aea83d53ed95bf97d46ce0fa7bc18c2747dd784ef5abb278f78

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
      Filesize

      392B

      MD5

      4a50dfb146aaa964f200fc8e97044dca

      SHA1

      7130c02c82733b328f007b7d3acb1ef6bf4c879b

      SHA256

      3c9224832deb00fa517c72c685a095abfa002b51074a180f1ee970f980eac16a

      SHA512

      b065695aac5e468ae15198b48283bb4f2163f50eaaf2283c71271202d9199335708cbbad6c8d9e5c5cb8a40348e29a97ff9c2806c6958da35f4c365079ac1649

    • C:\Users\Admin\AppData\Local\50f7c260-3db1-441f-b13a-6d1750cf9ef7\0a4517f2b2ffbf7c1dadffc3af69565c98baa1f9b0ad0946811ae8b95e124f98.exe
      Filesize

      715KB

      MD5

      045f054edf180dd0f0b3e0bc4ba2cde1

      SHA1

      b63439fa1025ae39a561e29288572f59b529807b

      SHA256

      0a4517f2b2ffbf7c1dadffc3af69565c98baa1f9b0ad0946811ae8b95e124f98

      SHA512

      a7b0a6d242d36f84114e96e784cba75778b4b4c946de72f3ae79f30532cd931482623b042a7c07c49781c5c3c01a41644832f2c122569b5027e75414db97149a

    • memory/3968-2-0x0000000004A00000-0x0000000004B1B000-memory.dmp
      Filesize

      1.1MB

    • memory/3968-1-0x0000000004960000-0x00000000049FA000-memory.dmp
      Filesize

      616KB

    • memory/4132-27-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/4132-33-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/4132-22-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/4132-38-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/4132-37-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/4132-36-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/4132-35-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/4132-28-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/4132-20-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/4132-29-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/4424-3-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/4424-4-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/4424-5-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/4424-6-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/4424-17-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB