Analysis

  • max time kernel
    149s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-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 6 IoCs
  • Detected Djvu ransomware 14 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
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 8 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 5 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 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of WriteProcessMemory 64 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:1784
    • C:\Users\Admin\AppData\Local\Temp\704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15.exe
      "C:\Users\Admin\AppData\Local\Temp\704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3016
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\b07f5b51-3f3a-404b-8fd7-536530dc7126" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2780
      • 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:2740
        • C:\Users\Admin\AppData\Local\Temp\704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15.exe
          "C:\Users\Admin\AppData\Local\Temp\704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2588
          • C:\Users\Admin\AppData\Local\535fcff2-4856-4399-b21e-199325b08063\build2.exe
            "C:\Users\Admin\AppData\Local\535fcff2-4856-4399-b21e-199325b08063\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1572
            • C:\Users\Admin\AppData\Local\535fcff2-4856-4399-b21e-199325b08063\build2.exe
              "C:\Users\Admin\AppData\Local\535fcff2-4856-4399-b21e-199325b08063\build2.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:1316
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1316 -s 940
                7⤵
                • Loads dropped DLL
                • Program crash
                PID:776
          • C:\Users\Admin\AppData\Local\535fcff2-4856-4399-b21e-199325b08063\build3.exe
            "C:\Users\Admin\AppData\Local\535fcff2-4856-4399-b21e-199325b08063\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1688
            • C:\Users\Admin\AppData\Local\535fcff2-4856-4399-b21e-199325b08063\build3.exe
              "C:\Users\Admin\AppData\Local\535fcff2-4856-4399-b21e-199325b08063\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:1936
  • 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"
    1⤵
    • Creates scheduled task(s)
    PID:2408
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {B1ACFCBC-28ED-4A65-B764-2C172EA9AC06} S-1-5-21-3601492379-692465709-652514833-1000:CALKHSYM\Admin:Interactive:[1]
    1⤵
      PID:2356
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        PID:2916
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:1232
          • 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"
            4⤵
            • Creates scheduled task(s)
            PID:1288

    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

      3ba5f7e27c7331d713973c7085a572bf

      SHA1

      cbd9ef655fc6761c2d9f2bbdc0871dc21503865d

      SHA256

      324148d7aa9db2625257f3592bf446948014692053192f9e0b210524d5d997c5

      SHA512

      9c83e3a88d71ca8f89fe0ec8e93b0699f9559d9349249f87399c6897336ae1b80aa13b9bc8f3b12ce302cfa16725d5bbc9f81ae566d6f46d2d2a5fb0add37442

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

      Filesize

      344B

      MD5

      03454983799bc5d51b22e75a8f3d38b5

      SHA1

      449302ac96256893bd5774e47d60063cd3025369

      SHA256

      341d68ab66f779185c3b9560e2c62dd7f3da3817944511390c45862789e6b15e

      SHA512

      a8fbfc80c39772abafdeb1b79d1cf92c110de2aa85946e6b585eae59336a9180afdee125fabf1d71ef17fbd444b90970025c9d34d284f99ff6a83ccc2dd60452

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

      Filesize

      392B

      MD5

      d82bd4c4a5fedd70f326029eab0833da

      SHA1

      7e56eb807740ab5266f06a1f4f1ee051fab592d2

      SHA256

      7c86a79f9460ba9dcf457e0569fd6d84b4debd225a147a972787f34a08b48e64

      SHA512

      f66c83365282343218e52f8333a95a548f8e73d7335abe3e3f6ddd306c012fe24b5a8b618a669b516196501f187c323e8ece9efa05a1751f2392fea3daf309be

    • C:\Users\Admin\AppData\Local\Temp\Cab586C.tmp

      Filesize

      65KB

      MD5

      ac05d27423a85adc1622c714f2cb6184

      SHA1

      b0fe2b1abddb97837ea0195be70ab2ff14d43198

      SHA256

      c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

      SHA512

      6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

    • C:\Users\Admin\AppData\Local\b07f5b51-3f3a-404b-8fd7-536530dc7126\704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15.exe

      Filesize

      700KB

      MD5

      73b7f3110048a36f783e7252bef3249c

      SHA1

      56f2fc7e606031ba6784f8b8eac4c8358c69bbbb

      SHA256

      704c5f63a1f5ee442b0fb943cb222f1032732f9f651917d51445ac36c8939a15

      SHA512

      4ee1b7dff9e2b5c3ca17c502235879045f93aed44b4dcd177c3fd92f16de0765f9727b32c223f897edd2cb55541810c491ff917f057be06bae602978036785a6

    • \Users\Admin\AppData\Local\535fcff2-4856-4399-b21e-199325b08063\build2.exe

      Filesize

      247KB

      MD5

      1f7efac73d987dae200e36922267d8c6

      SHA1

      a1bb90007d2e00025953c13ca742d767ebcce27e

      SHA256

      5719504e2f4e976c8ce6fbfda399b80273e783ff05f61dfd1f1bd4737f0bde8a

      SHA512

      75ef83a7e079e553a98e60dd73a9eebbaa793ced7bbd8a712a8f7f363349456d12b3766481d03d00f376cf31c4697afd934eb9b29a2e70727a70a9f463d03bed

    • memory/1232-136-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB

    • memory/1316-79-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1316-80-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1316-74-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1316-115-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1316-107-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1572-76-0x0000000000982000-0x000000000099A000-memory.dmp

      Filesize

      96KB

    • memory/1572-78-0x0000000000230000-0x000000000025A000-memory.dmp

      Filesize

      168KB

    • memory/1688-101-0x0000000000922000-0x0000000000933000-memory.dmp

      Filesize

      68KB

    • memory/1688-102-0x0000000000220000-0x0000000000224000-memory.dmp

      Filesize

      16KB

    • memory/1784-4-0x00000000008E0000-0x00000000009FB000-memory.dmp

      Filesize

      1.1MB

    • memory/1784-2-0x0000000000230000-0x00000000002C2000-memory.dmp

      Filesize

      584KB

    • memory/1784-0-0x0000000000230000-0x00000000002C2000-memory.dmp

      Filesize

      584KB

    • memory/1936-98-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB

    • memory/1936-103-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB

    • memory/1936-105-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB

    • memory/2588-48-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2588-57-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2588-55-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2588-56-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2588-53-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2588-49-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2588-34-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2588-92-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2588-35-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2740-30-0x0000000002130000-0x00000000021C2000-memory.dmp

      Filesize

      584KB

    • memory/2740-28-0x0000000002130000-0x00000000021C2000-memory.dmp

      Filesize

      584KB

    • memory/2916-133-0x0000000000932000-0x0000000000942000-memory.dmp

      Filesize

      64KB

    • memory/3016-26-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3016-8-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3016-7-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3016-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/3016-5-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB