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Analysis

  • max time kernel
    117s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    08/01/2025, 19:50

General

  • Target

    bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe

  • Size

    766KB

  • MD5

    2cb8c190f4cc23501bc6965d9d762977

  • SHA1

    3b6f667d28eec165a2ccfaed4fb3cf87084b06ed

  • SHA256

    bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2

  • SHA512

    295dee006e2d991ffc6b8016a02a2e171973552527bfa3c040f91aabb46c2233c62dbf41dec0d97db61ac1f145c875f79a3bfa28c09b74c1ed23016abd729697

  • SSDEEP

    12288:nKDiXNmHNpcGWH69SIW5JBvOwcMBl4tT5jVXctOpctHni7LEwvn:nMiXNKNpM6jW5JDcIit+OpAHUEw/

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test1/get.php

Attributes
  • extension

    .held

  • offline_id

    vyhLHcV0DMKjS0CgDoJGF0yJ299laBK7lZQM9Tt1

  • payload_url

  • 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. 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: 0879held

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 15 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Djvu family
  • 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).

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
    "C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2520
    • C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
      "C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe"
      2⤵
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2172
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\6e64a241-e4bd-483b-9ea9-7edb05275002" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:2904
      • C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
        "C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2744
        • C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe
          "C:\Users\Admin\AppData\Local\Temp\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:2912

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

    Filesize

    1KB

    MD5

    c9be626e9715952e9b70f92f912b9787

    SHA1

    aa2e946d9ad9027172d0d321917942b7562d6abe

    SHA256

    c13e8d22800c200915f87f71c31185053e4e60ca25de2e41e160e09cd2d815d4

    SHA512

    7581b7c593785380e9db3ae760af85c1a889f607a3cd2aa5a2695a0e5a0fe8ee751578e88f7d8c997faeda804e2fc2655d859bee2832eace526ed4379edaa3f5

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

    Filesize

    436B

    MD5

    971c514f84bba0785f80aa1c23edfd79

    SHA1

    732acea710a87530c6b08ecdf32a110d254a54c8

    SHA256

    f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895

    SHA512

    43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

    Filesize

    174B

    MD5

    300620d85bae4aaabf127aa12b5192a0

    SHA1

    da9e7a9d911e970a36e4b7975d00d1754c218e4d

    SHA256

    d87ae2f31047aa611ab3fcf63522bbc47a77dde03c261ade05aaaf3a38d75fc7

    SHA512

    e03845af1127deb2bdc32312adc2d59179eb088d334966ef6ab35817103a7d20f7ecff422e54edec937d65b68b3da479e265880d40ff305b9487c342c2ea1aa2

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

    Filesize

    170B

    MD5

    4c3562d55ba5d7e8a99ad19f9f560f58

    SHA1

    e940f1ce0b6d147c9d36148fb323647444723ea0

    SHA256

    47412308c10a82fe3db33c04d5886ffdb0b42b367fa4114b951bfc5d937ac6a4

    SHA512

    df112e89ebbe20dce6050f742722537d390d262f7b314b3c2c25a23abb7f95f7a775486eba64f21558766c56304c3e5d753a41f323db27936f477f58c2682c33

  • C:\Users\Admin\AppData\Local\6e64a241-e4bd-483b-9ea9-7edb05275002\bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2.exe

    Filesize

    766KB

    MD5

    2cb8c190f4cc23501bc6965d9d762977

    SHA1

    3b6f667d28eec165a2ccfaed4fb3cf87084b06ed

    SHA256

    bce72535b8dfbb5eb44507956b9795e4331b2f991147902938d9c631fe0515b2

    SHA512

    295dee006e2d991ffc6b8016a02a2e171973552527bfa3c040f91aabb46c2233c62dbf41dec0d97db61ac1f145c875f79a3bfa28c09b74c1ed23016abd729697

  • C:\Users\Admin\AppData\Local\Temp\CabC929.tmp

    Filesize

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

  • memory/2172-9-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2172-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2172-8-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2172-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2172-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2520-0-0x0000000002050000-0x00000000020E1000-memory.dmp

    Filesize

    580KB

  • memory/2520-1-0x0000000002050000-0x00000000020E1000-memory.dmp

    Filesize

    580KB

  • memory/2520-2-0x00000000021A0000-0x00000000022BB000-memory.dmp

    Filesize

    1.1MB

  • memory/2520-6-0x0000000002050000-0x00000000020E1000-memory.dmp

    Filesize

    580KB

  • memory/2744-50-0x0000000000400000-0x0000000000898000-memory.dmp

    Filesize

    4.6MB

  • memory/2744-34-0x0000000000400000-0x0000000000898000-memory.dmp

    Filesize

    4.6MB

  • memory/2744-28-0x00000000008A0000-0x0000000000931000-memory.dmp

    Filesize

    580KB

  • memory/2912-33-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2912-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2912-47-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2912-49-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2912-48-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2912-51-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2912-57-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2912-59-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2912-60-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2912-61-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB