Analysis

  • max time kernel
    143s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/01/2024, 20:13

General

  • Target

    704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15.exe

  • Size

    700KB

  • MD5

    73b7f3110048a36f783e7252bef3249c

  • SHA1

    56f2fc7e606031ba6784f8b8eac4c8358c69bbbb

  • SHA256

    704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15

  • SHA512

    4ee1b7dff9e2b5c3ca17c502235879045f93aed44b4dcd177c3fd92f16de0765f9727b32c223f897edd2cb55541810c491ff917f057be06bae602978036785a6

  • SSDEEP

    12288:YOMiOIe2cbO9hFe1tOwRun2wlIa2IXWaNmjCSFN74Oiv2BcM/cNS:1jeb6de1AhIa2O9mjPFNUnuZ/ck

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .cdwe

  • offline_id

    dSwr1XNNi5cIitB5eDPbMANcusB1dWGDB8ToUnt1

  • payload_url

    http://brusuax.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-e21iz7dS58 Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. 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: 0842ASdw

rsa_pubkey.plain

Signatures

  • Detect Vidar Stealer 5 IoCs
  • Detected Djvu ransomware 17 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 4 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 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 54 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15.exe
    "C:\Users\Admin\AppData\Local\Temp\704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3408
    • C:\Users\Admin\AppData\Local\Temp\704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15.exe
      "C:\Users\Admin\AppData\Local\Temp\704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2392
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\020855ee-53de-4071-a599-e9a881a9f2b8" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3872
      • C:\Users\Admin\AppData\Local\Temp\704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15.exe
        "C:\Users\Admin\AppData\Local\Temp\704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4548
        • C:\Users\Admin\AppData\Local\Temp\704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15.exe
          "C:\Users\Admin\AppData\Local\Temp\704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1228
          • C:\Users\Admin\AppData\Local\f595df76-91b8-492d-8854-44406597cead\build2.exe
            "C:\Users\Admin\AppData\Local\f595df76-91b8-492d-8854-44406597cead\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4680
            • C:\Users\Admin\AppData\Local\f595df76-91b8-492d-8854-44406597cead\build2.exe
              "C:\Users\Admin\AppData\Local\f595df76-91b8-492d-8854-44406597cead\build2.exe"
              6⤵
              • Executes dropped EXE
              PID:1648
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1648 -s 2036
                7⤵
                • Program crash
                PID:1492
          • C:\Users\Admin\AppData\Local\f595df76-91b8-492d-8854-44406597cead\build3.exe
            "C:\Users\Admin\AppData\Local\f595df76-91b8-492d-8854-44406597cead\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:552
            • C:\Users\Admin\AppData\Local\f595df76-91b8-492d-8854-44406597cead\build3.exe
              "C:\Users\Admin\AppData\Local\f595df76-91b8-492d-8854-44406597cead\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:4768
              • C:\Windows\SysWOW64\schtasks.exe
                /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
                7⤵
                • Creates scheduled task(s)
                PID:904
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1648 -ip 1648
    1⤵
      PID:1976

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      1KB

      MD5

      8b3f66674e6838f15e010a3a85daa599

      SHA1

      58fc249721056bb240912535e042dc744c158aba

      SHA256

      c94853517feb843767fd405e5bb1a7e01b8e284e39072bf5fd8ff4e7cc47b8b9

      SHA512

      66f484aae25fd5aa9070652929a2d45c6106475f6bc94e16d49d2f1216d1b07923878205a5eb23afb5b662f527d6319dfbd9cea58d2fac13cd5d12dc141c822c

    • 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

      839cf5d22bba4d5a7511dadc32db9c5b

      SHA1

      b7a4afac630090920e3826a7c90c57a4056c6a5f

      SHA256

      3671f954f9f9638fe74622540a9ba5120d9b144e3cfa944d4ee15beca56618eb

      SHA512

      e9603590da330da0d85b9a0e51474397861383431bab27e7938b34f50d3fef49b7579e14ae0b16b775b76eb3dd8d38efa236ccb7580a6de4d524a8d5d1abe6c2

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

      Filesize

      392B

      MD5

      37c7c319a8739d4284cd4a93774ea8e0

      SHA1

      6d6dd521dda0fbd1f1e5722fcc9d1b05b29b008a

      SHA256

      5ada35eec016c9d7a125e1a564a214fb07e42efa5a7fe1c650c77ad81ed36561

      SHA512

      448021d3491f6793768a4443d1f2e412bdaa1fa30712ce2e823ed1e8b875e1873e8b8e307911e2ae2ba043c8442358e1ebdc81ca9de6dd14a0958bbb89082e05

    • C:\Users\Admin\AppData\Local\020855ee-53de-4071-a599-e9a881a9f2b8\704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15.exe

      Filesize

      700KB

      MD5

      73b7f3110048a36f783e7252bef3249c

      SHA1

      56f2fc7e606031ba6784f8b8eac4c8358c69bbbb

      SHA256

      704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15

      SHA512

      4ee1b7dff9e2b5c3ca17c502235879045f93aed44b4dcd177c3fd92f16de0765f9727b32c223f897edd2cb55541810c491ff917f057be06bae602978036785a6

    • C:\Users\Admin\AppData\Local\f595df76-91b8-492d-8854-44406597cead\build2.exe

      Filesize

      247KB

      MD5

      1f7efac73d987dae200e36922267d8c6

      SHA1

      a1bb90007d2e00025953c13ca742d767ebcce27e

      SHA256

      5719504e2f4e976c8ce6fbfda399b80273e783ff05f61dfd1f1bd4737f0bde8a

      SHA512

      75ef83a7e079e553a98e60dd73a9eebbaa793ced7bbd8a712a8f7f363349456d12b3766481d03d00f376cf31c4697afd934eb9b29a2e70727a70a9f463d03bed

    • C:\Users\Admin\AppData\Local\f595df76-91b8-492d-8854-44406597cead\build3.exe

      Filesize

      299KB

      MD5

      41b883a061c95e9b9cb17d4ca50de770

      SHA1

      1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

      SHA256

      fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

      SHA512

      cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

    • memory/552-87-0x0000000000880000-0x0000000000884000-memory.dmp

      Filesize

      16KB

    • memory/552-85-0x00000000008CD000-0x00000000008DD000-memory.dmp

      Filesize

      64KB

    • memory/1228-35-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1228-37-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1228-22-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1228-20-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1228-66-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1228-21-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1228-36-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1228-28-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1228-27-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1228-32-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1228-34-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/1648-69-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1648-76-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1648-75-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1648-74-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/2392-4-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2392-5-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2392-15-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2392-6-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2392-3-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3408-1-0x00000000025B0000-0x000000000264B000-memory.dmp

      Filesize

      620KB

    • memory/3408-2-0x0000000002650000-0x000000000276B000-memory.dmp

      Filesize

      1.1MB

    • memory/4548-18-0x00000000023B0000-0x000000000244C000-memory.dmp

      Filesize

      624KB

    • memory/4680-73-0x0000000000AC0000-0x0000000000AEA000-memory.dmp

      Filesize

      168KB

    • memory/4680-70-0x0000000000B80000-0x0000000000C80000-memory.dmp

      Filesize

      1024KB

    • memory/4768-82-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB

    • memory/4768-86-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB

    • memory/4768-89-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB