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Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/09/2024, 05:44

General

  • Target

    opgdt.exe

  • Size

    736KB

  • MD5

    664de3b2a24525498193312ba05bbd59

  • SHA1

    6aec18d934495a68b8a3fbee3ac6e4d0a44f0400

  • SHA256

    f23c7c958001a1eb56b4f4fee91d024f22eed3a3fd88a59eefff09a677ad7478

  • SHA512

    2967289dc6eaa0673ee71718e3493cd36f4a27f9d1edbb68bf6d0cdc66c9373fea9b1bed1f1238013f064d4901666fb535deb84e541875a58d0cb07dd256177f

  • SSDEEP

    12288:xIq8+GU7BALLZq4ah/h+c+s9k0vI50mJqLGiPMDoEA/7LCy2inm:xIqlhGFq4ahJ+cd9k0vI50mJiDYoJjLC

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/raud/get.php

Attributes
  • extension

    .coza

  • offline_id

    O8Ao46dcCReRPC4I1PGMYsRFFc9WI5eOp0O3MFt1

  • payload_url

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

    http://zexeq.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-EPBZCVAS8s 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: 0693JOsie

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 17 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Checks computer location settings 2 TTPs 2 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).

  • 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 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\opgdt.exe
    "C:\Users\Admin\AppData\Local\Temp\opgdt.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4348
    • C:\Users\Admin\AppData\Local\Temp\opgdt.exe
      "C:\Users\Admin\AppData\Local\Temp\opgdt.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:5016
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\5339e9ea-fd88-444a-92aa-61d08849db9a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:3176
      • C:\Users\Admin\AppData\Local\Temp\opgdt.exe
        "C:\Users\Admin\AppData\Local\Temp\opgdt.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1460
        • C:\Users\Admin\AppData\Local\Temp\opgdt.exe
          "C:\Users\Admin\AppData\Local\Temp\opgdt.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:4420

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

    7fb5fa1534dcf77f2125b2403b30a0ee

    SHA1

    365d96812a69ac0a4611ea4b70a3f306576cc3ea

    SHA256

    33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f

    SHA512

    a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e

  • 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

    8136a2798dd6e4424e20df13c81cdbf5

    SHA1

    dd9606254be635c2cbb4cba7a52b77db6e8390f4

    SHA256

    db452f87e52a5bd4dc24b86279646bf955738ca3a7ebdc598f45801dd278a6d3

    SHA512

    92ecdb68c936cc8c9b9a113c98ecdf460c86007b3c77cb0e6f4104f630c6c82215703a0985d0b2a58436fe2897ba55fe014c0ab2e71ff82429bee6bc5570291f

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

    Filesize

    170B

    MD5

    44c6823c5f99e46962c229201d2c273f

    SHA1

    0d3a0e7fac1502646eaad9c7350fd3e08d081c34

    SHA256

    1bc6e333e005023b5020bc267d0f1672e16ad4cbe13e9863635cd3b86181ff45

    SHA512

    a92c567e17716400a048b75b2c2a4100517e1911f62a488e81e12ab6f8014f3336b37855be4bd94bb0402f9a92c068e7a9a53d0e1105a1f7758cdc2b3d8a0dcd

  • C:\Users\Admin\AppData\Local\5339e9ea-fd88-444a-92aa-61d08849db9a\opgdt.exe

    Filesize

    736KB

    MD5

    664de3b2a24525498193312ba05bbd59

    SHA1

    6aec18d934495a68b8a3fbee3ac6e4d0a44f0400

    SHA256

    f23c7c958001a1eb56b4f4fee91d024f22eed3a3fd88a59eefff09a677ad7478

    SHA512

    2967289dc6eaa0673ee71718e3493cd36f4a27f9d1edbb68bf6d0cdc66c9373fea9b1bed1f1238013f064d4901666fb535deb84e541875a58d0cb07dd256177f

  • C:\Users\Admin\AppData\Local\77b3fa50-af59-4d1a-bc3a-0c6a019bad2f\build3.exe

    Filesize

    437B

    MD5

    6910426a598bc0b07dd6ca7c2faf5c22

    SHA1

    4304d65a08652b167453997e1464cc6ef034be23

    SHA256

    ebfef207462c29030b8a06068c8cbf1cfeae1304813b9cdbfa2d705b314bf692

    SHA512

    5e96757fa5daa336968aa07d5fe5525040a081a547dd6bad55bed4539ad76b3f96aabd38f461efdafa4a427963b2a3187cc40dfa60c74e6c6ddf738176381952

  • C:\Users\Admin\AppData\Local\bowsakkdestx.txt

    Filesize

    449B

    MD5

    caa078f0348cda98328127c142e3bfed

    SHA1

    e38274d642c806a3affcca8f7e37b61f591c47e6

    SHA256

    91faeb982f34313750a83d74c5464abe4e01357d1a7ea4253973509bc0e9d219

    SHA512

    2e6a5c482b5226079c6b4bd9a706537c372a3b43962f64be6bdd281e3217f963316ef0eba38164890bdf14af6558eb26605320487f0a0c841be9bb813c2ee5d6

  • memory/4348-2-0x0000000004990000-0x0000000004AAB000-memory.dmp

    Filesize

    1.1MB

  • memory/4348-1-0x00000000048F0000-0x000000000498E000-memory.dmp

    Filesize

    632KB

  • memory/4420-61-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4420-43-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4420-66-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4420-65-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4420-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4420-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4420-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4420-64-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4420-49-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4420-63-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4420-60-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5016-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5016-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5016-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5016-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/5016-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB