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Analysis

  • max time kernel
    145s
  • max time network
    132s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    20/12/2024, 19:25

General

  • Target

    04672ac92929c1b2589702f4c0dac7e18f0a2858542809a9c88014826a6df3f6.exe

  • Size

    876KB

  • MD5

    41b0583e986bd5b29056fe47535545e3

  • SHA1

    f7e44e9d530f70621a47e9f850da1bb5e2871960

  • SHA256

    04672ac92929c1b2589702f4c0dac7e18f0a2858542809a9c88014826a6df3f6

  • SHA512

    beba9665b1635d2b07b726552fa23637a20cca144787833bfd77aa83cfa75f12fc4e2ea632efd08a6403eb6b646326d8f94fac282a81f05a929231e7f8ce4782

  • SSDEEP

    12288:nPmDfAmqboRKh2b/fD3E735ylKz8MLzKs43aK55d6B4MXR+EQYV6nm/PfP6ultXm:nq7xRKhE/rEslmTLa55d6ShEq8PTc

Malware Config

Extracted

Family

djvu

C2

http://tzgl.org/fhsgtsspen6/get.php

Attributes
  • extension

    .yoqs

  • offline_id

    Gy1ekaHyw11ZDr43dKFxYo9wA3NxFYOUEc6Pwvt1

  • payload_url

    http://lencu.top/dl/build2.exe

    http://tzgl.org/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-veBR09KNyi Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0380UIhfSd

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\04672ac92929c1b2589702f4c0dac7e18f0a2858542809a9c88014826a6df3f6.exe
    "C:\Users\Admin\AppData\Local\Temp\04672ac92929c1b2589702f4c0dac7e18f0a2858542809a9c88014826a6df3f6.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2208
    • C:\Users\Admin\AppData\Local\Temp\04672ac92929c1b2589702f4c0dac7e18f0a2858542809a9c88014826a6df3f6.exe
      "C:\Users\Admin\AppData\Local\Temp\04672ac92929c1b2589702f4c0dac7e18f0a2858542809a9c88014826a6df3f6.exe"
      2⤵
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1832
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\fab3dfe1-b6c8-4f0d-b20e-3b00cab167a1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:2756
      • C:\Users\Admin\AppData\Local\Temp\04672ac92929c1b2589702f4c0dac7e18f0a2858542809a9c88014826a6df3f6.exe
        "C:\Users\Admin\AppData\Local\Temp\04672ac92929c1b2589702f4c0dac7e18f0a2858542809a9c88014826a6df3f6.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2968
        • C:\Users\Admin\AppData\Local\Temp\04672ac92929c1b2589702f4c0dac7e18f0a2858542809a9c88014826a6df3f6.exe
          "C:\Users\Admin\AppData\Local\Temp\04672ac92929c1b2589702f4c0dac7e18f0a2858542809a9c88014826a6df3f6.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:1068

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    1KB

    MD5

    67e486b2f148a3fca863728242b6273e

    SHA1

    452a84c183d7ea5b7c015b597e94af8eef66d44a

    SHA256

    facaf1c3a4bf232abce19a2d534e495b0d3adc7dbe3797d336249aa6f70adcfb

    SHA512

    d3a37da3bb10a9736dc03e8b2b49baceef5d73c026e2077b8ebc1b786f2c9b2f807e0aa13a5866cf3b3cafd2bc506242ef139c423eaffb050bbb87773e53881e

  • 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

    7feace2a9dfb6042c2fbe5e070c64f33

    SHA1

    34f95b3d020fa0818abf035abcc1e73b5c35ab75

    SHA256

    fbe5cd886add8c51e23badda08ff550878b89ec53fbcfa5967bb6302079c8518

    SHA512

    03bcc16a502b36c373e5f07ac20168c2b6fc814edbaf07a505ce0b9b32c648f788e6fd0df28d18ba6a9df9b3273fad4ae78f20e5af9139f34397eb8e4f522bb2

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

    Filesize

    170B

    MD5

    6c339e60b61892a94577776f7d2d7a45

    SHA1

    56ca63987705c4ee1022824adc56b1e4579aa6f6

    SHA256

    ba6e3ced5ca8f497537d502660db9e16c3b0b694e9ebbbad4ddf5b44c6e7bae0

    SHA512

    339fdc2672802f2616fc7ac52b639a2f9e583af5c0b98d96db3072f900f3ebb05df0a56c7f238e8ff83a2632363e57dca3f51b889ace511070ab001be8f1a92d

  • C:\Users\Admin\AppData\Local\Temp\CabE85C.tmp

    Filesize

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

  • C:\Users\Admin\AppData\Local\fab3dfe1-b6c8-4f0d-b20e-3b00cab167a1\04672ac92929c1b2589702f4c0dac7e18f0a2858542809a9c88014826a6df3f6.exe

    Filesize

    876KB

    MD5

    41b0583e986bd5b29056fe47535545e3

    SHA1

    f7e44e9d530f70621a47e9f850da1bb5e2871960

    SHA256

    04672ac92929c1b2589702f4c0dac7e18f0a2858542809a9c88014826a6df3f6

    SHA512

    beba9665b1635d2b07b726552fa23637a20cca144787833bfd77aa83cfa75f12fc4e2ea632efd08a6403eb6b646326d8f94fac282a81f05a929231e7f8ce4782

  • memory/1068-66-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1068-52-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1068-53-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1068-51-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1068-57-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1068-69-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1068-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1068-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1068-68-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1068-70-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1832-9-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1832-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1832-8-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1832-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1832-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2208-0-0x0000000000220000-0x00000000002B2000-memory.dmp

    Filesize

    584KB

  • memory/2208-7-0x0000000000220000-0x00000000002B2000-memory.dmp

    Filesize

    584KB

  • memory/2208-2-0x0000000001E70000-0x0000000001F8B000-memory.dmp

    Filesize

    1.1MB

  • memory/2208-1-0x0000000000220000-0x00000000002B2000-memory.dmp

    Filesize

    584KB

  • memory/2968-36-0x0000000000400000-0x0000000000506000-memory.dmp

    Filesize

    1.0MB

  • memory/2968-30-0x0000000000400000-0x0000000000506000-memory.dmp

    Filesize

    1.0MB

  • memory/2968-29-0x0000000000230000-0x00000000002C2000-memory.dmp

    Filesize

    584KB