Resubmissions

04/10/2024, 16:44

241004-t8yv3syhpd10

27/09/2024, 16:54

240927-vepkzsvbre10

27/09/2024, 16:44

240927-t86wpavard10

04/08/2024, 18:04

240804-wnq1vawbpg10

03/08/2024, 17:26

240803-vzvbzazekn10

03/08/2024, 16:14

240803-tpp4tsshqa10

03/08/2024, 15:52

240803-tbarzsseqc10

31/07/2024, 19:40

240731-ydk3yszdpq10

31/07/2024, 10:53

240731-my145atfmf10

Analysis

  • max time kernel
    147s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/08/2024, 15:52

General

  • Target
    32b0fbaf95fefcc9b89243be8721625592fc9ed92d76a48cab263898fd3d5c08.exe
  • Size 844KB
  • Sample240803-tbarzsseqc
  • SHA256 32b0fbaf95fefcc9b89243be8721625592fc9ed92d76a48cab263898fd3d5c08
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • djvu

C2
  • http://asvb.top/nddddhsspen6/get.php

Attributes
  • extension

    .ehiz

  • offline_id

    94ZMASYQt4QGhpOo8gEwVMGuTvtKzw670thXUlt1

  • payload_url

    http://asvb.top/files/penelop/updatewin1.exe

    http://asvb.top/files/penelop/updatewin2.exe

    http://asvb.top/files/penelop/updatewin.exe

    http://asvb.top/files/penelop/3.exe

    http://asvb.top/files/penelop/4.exe

    http://asvb.top/files/penelop/5.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-IMhsjaUZQE 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: 0299ewgfDd

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 12 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.

  • Executes dropped EXE 2 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 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 7 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 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\32b0fbaf95fefcc9b89243be8721625592fc9ed92d76a48cab263898fd3d5c08.exe
    "C:\Users\Admin\AppData\Local\Temp\32b0fbaf95fefcc9b89243be8721625592fc9ed92d76a48cab263898fd3d5c08.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2632
    • C:\Users\Admin\AppData\Local\Temp\32b0fbaf95fefcc9b89243be8721625592fc9ed92d76a48cab263898fd3d5c08.exe
      "C:\Users\Admin\AppData\Local\Temp\32b0fbaf95fefcc9b89243be8721625592fc9ed92d76a48cab263898fd3d5c08.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:4816
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\b3277c86-cf9e-4bb8-aa49-e99ff0da0102" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:4240
      • C:\Users\Admin\AppData\Local\Temp\32b0fbaf95fefcc9b89243be8721625592fc9ed92d76a48cab263898fd3d5c08.exe
        "C:\Users\Admin\AppData\Local\Temp\32b0fbaf95fefcc9b89243be8721625592fc9ed92d76a48cab263898fd3d5c08.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:348
        • C:\Users\Admin\AppData\Local\Temp\32b0fbaf95fefcc9b89243be8721625592fc9ed92d76a48cab263898fd3d5c08.exe
          "C:\Users\Admin\AppData\Local\Temp\32b0fbaf95fefcc9b89243be8721625592fc9ed92d76a48cab263898fd3d5c08.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2920
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 2920 -s 576
            5⤵
            • Program crash
            PID:4064
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 2920 -ip 2920
    1⤵
      PID:3400
    • C:\Users\Admin\AppData\Local\b3277c86-cf9e-4bb8-aa49-e99ff0da0102\32b0fbaf95fefcc9b89243be8721625592fc9ed92d76a48cab263898fd3d5c08.exe
      C:\Users\Admin\AppData\Local\b3277c86-cf9e-4bb8-aa49-e99ff0da0102\32b0fbaf95fefcc9b89243be8721625592fc9ed92d76a48cab263898fd3d5c08.exe --Task
      1⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4008
      • C:\Users\Admin\AppData\Local\b3277c86-cf9e-4bb8-aa49-e99ff0da0102\32b0fbaf95fefcc9b89243be8721625592fc9ed92d76a48cab263898fd3d5c08.exe
        C:\Users\Admin\AppData\Local\b3277c86-cf9e-4bb8-aa49-e99ff0da0102\32b0fbaf95fefcc9b89243be8721625592fc9ed92d76a48cab263898fd3d5c08.exe --Task
        2⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:2696

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          8B2B9A00839EED1DFDCCC3BFC2F5DF12

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
          • Size 1KB
          • SHA256 33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f
          • MD5 SHA1 SHA512

          B46811C17859FFB409CF0E904A4AA8F8

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
          • Size 436B
          • SHA256 f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895
          • MD5 SHA1 SHA512

          8B2B9A00839EED1DFDCCC3BFC2F5DF12

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
          • Size 174B
          • SHA256 ddf1d23e05539a144d5ad0967e086df79849d5ae0b9e0cf2cb82e8720c02b449
          • MD5 SHA1 SHA512

          B46811C17859FFB409CF0E904A4AA8F8

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
          • Size 170B
          • SHA256 f269edc27449ecb5746b7cf665f622a693ee036a4e35fd1fae76692dbea3c20b
          • MD5 SHA1 SHA512

          32b0fbaf95fefcc9b89243be8721625592fc9ed92d76a48cab263898fd3d5c08.exe

          • Path C:\Users\Admin\AppData\Local\b3277c86-cf9e-4bb8-aa49-e99ff0da0102\32b0fbaf95fefcc9b89243be8721625592fc9ed92d76a48cab263898fd3d5c08.exe
          • Size 844KB
          • SHA256 32b0fbaf95fefcc9b89243be8721625592fc9ed92d76a48cab263898fd3d5c08
          • MD5 SHA1 SHA512 SSDEEP

          memory/348-25-0x0000000000400000-0x00000000004DC000-memory.dmp

          memory/348-21-0x0000000000400000-0x00000000004DC000-memory.dmp

          memory/2632-2-0x0000000002300000-0x000000000241B000-memory.dmp

          memory/2632-1-0x0000000002260000-0x00000000022FC000-memory.dmp

          memory/2696-43-0x0000000000400000-0x0000000000537000-memory.dmp

          memory/2696-44-0x0000000000400000-0x0000000000537000-memory.dmp

          memory/2696-35-0x0000000000400000-0x0000000000537000-memory.dmp

          memory/2920-27-0x0000000000400000-0x0000000000537000-memory.dmp

          memory/2920-24-0x0000000000400000-0x0000000000537000-memory.dmp

          memory/2920-23-0x0000000000400000-0x0000000000537000-memory.dmp

          memory/4008-36-0x0000000000400000-0x00000000004DC000-memory.dmp

          memory/4008-33-0x0000000000400000-0x00000000004DC000-memory.dmp

          memory/4816-19-0x0000000000400000-0x0000000000537000-memory.dmp

          memory/4816-6-0x0000000000400000-0x0000000000537000-memory.dmp

          memory/4816-5-0x0000000000400000-0x0000000000537000-memory.dmp

          memory/4816-4-0x0000000000400000-0x0000000000537000-memory.dmp

          memory/4816-3-0x0000000000400000-0x0000000000537000-memory.dmp