Analysis

  • max time kernel
    147s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    11-01-2024 12:02

General

  • Target

    9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe

  • Size

    688KB

  • MD5

    cd2a2421b83821c6c98e6d0bd346d7bd

  • SHA1

    0723c84c1e70a010e60b623526d146a469a69420

  • SHA256

    9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c

  • SHA512

    f054710a96054db19b87511431b0868ceb824f94b8fd5e74a24298013c08d056b5bdeb56b4bc2baad3f4f343bea2bde82fe9a3de2a5698778edfcccf7f97c58f

  • SSDEEP

    12288:DFaV1oBGxcJ7Mj8G25d970Ecg3zgb5pzisLx+uGwE9EzX7:8VWBxC8rJ3zgbesLxrPyE

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .cdqw

  • offline_id

    mMsRxMUuXypapZbGOAfxD9pczHmW8zVRP7Pgjwt1

  • 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-99MNqXMrdS 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: 0840ASdw

rsa_pubkey.plain

Signatures

  • Detect Vidar Stealer 5 IoCs
  • Detected Djvu ransomware 15 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 2 IoCs
  • Loads dropped DLL 6 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
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 49 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe
    "C:\Users\Admin\AppData\Local\Temp\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2392
    • C:\Users\Admin\AppData\Local\Temp\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe
      "C:\Users\Admin\AppData\Local\Temp\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3036
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\70d2e792-9e4b-4d55-9ead-fad2c663e6b3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2944
      • C:\Users\Admin\AppData\Local\Temp\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe
        "C:\Users\Admin\AppData\Local\Temp\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2844
        • C:\Users\Admin\AppData\Local\Temp\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe
          "C:\Users\Admin\AppData\Local\Temp\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2608
          • C:\Users\Admin\AppData\Local\59fdfd3e-779e-4c7f-b063-f7adf418b075\build2.exe
            "C:\Users\Admin\AppData\Local\59fdfd3e-779e-4c7f-b063-f7adf418b075\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:740
            • C:\Users\Admin\AppData\Local\59fdfd3e-779e-4c7f-b063-f7adf418b075\build2.exe
              "C:\Users\Admin\AppData\Local\59fdfd3e-779e-4c7f-b063-f7adf418b075\build2.exe"
              6⤵
              • Executes dropped EXE
              • Modifies system certificate store
              • Suspicious use of WriteProcessMemory
              PID:1572
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1572 -s 1468
                7⤵
                • Loads dropped DLL
                • Program crash
                PID:2064

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    410B

    MD5

    e849b4d99232368187001b8b785aa683

    SHA1

    617acd3d1269e0af2b6f5f40be9e0b543b28ce24

    SHA256

    30866a09601a03c344cf761ef16cd4e678e93191461b81233b1d404e39cf7ef6

    SHA512

    d56e277a59e72f15b09579d676ffef747186c008a669e1a20167aad7f6cbe4eda3038f28a598db3b2079359382e904383d2ba0fba14bbec29d8208d605ddb6ba

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

    Filesize

    344B

    MD5

    c46815285af5fd8a8aba45a2270053f3

    SHA1

    d5a98f46127e73736ccee48a8836da7479f84525

    SHA256

    e646c23f66eaff6ab02d0b0e997484530fd769a530912bd80c3d91b00a6a2c7c

    SHA512

    6e051dbabe1624c67c2e8d1fda458d11768f625da09578fddfecd09ad9a4a9a4183fc5f03ef8fe78d88ca21a215dbbf24dd74fb41721d412bdb509c958d7458f

  • C:\Users\Admin\AppData\Local\70d2e792-9e4b-4d55-9ead-fad2c663e6b3\9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c.exe

    Filesize

    688KB

    MD5

    cd2a2421b83821c6c98e6d0bd346d7bd

    SHA1

    0723c84c1e70a010e60b623526d146a469a69420

    SHA256

    9dfb6b41c90732c9206ef6f65a941b1061126ead69e3715d79519196dad5899c

    SHA512

    f054710a96054db19b87511431b0868ceb824f94b8fd5e74a24298013c08d056b5bdeb56b4bc2baad3f4f343bea2bde82fe9a3de2a5698778edfcccf7f97c58f

  • C:\Users\Admin\AppData\Local\Temp\Tar89E9.tmp

    Filesize

    92KB

    MD5

    71e4ce8b3a1b89f335a6936bbdafce4c

    SHA1

    6e0d450eb5f316a9924b3e58445b26bfb727001e

    SHA256

    a5edfae1527d0c8d9fe5e7a2c5c21b671e61f9981f3bcf9e8cc9f9bb9f3b44c5

    SHA512

    b80af88699330e1ff01e409daabdedeef350fe7d192724dfa8622afa71e132076144175f6e097f8136f1bba44c7cb30cfdd0414dbe4e0a4712b3bad7b70aeff7

  • \Users\Admin\AppData\Local\59fdfd3e-779e-4c7f-b063-f7adf418b075\build2.exe

    Filesize

    358KB

    MD5

    c4070da9f9b0581171af16e681ccdff8

    SHA1

    3fb4182921fdc3acd7873ebe113ac5522585312a

    SHA256

    26063c78e5418610471a9f3a00a155d7d1e5b29856e1979ba3bdc42681a871d0

    SHA512

    c7569cea7f1a841e7cac9cd41287dba3bcacf2cf9dee7bece88800848a7ad5dc4cd2bdc896c7389f0f1144079bbe168048b3f722bcd76fa5d6e14f3081bb6427

  • memory/740-68-0x0000000000230000-0x000000000027B000-memory.dmp

    Filesize

    300KB

  • memory/740-66-0x0000000000590000-0x0000000000690000-memory.dmp

    Filesize

    1024KB

  • memory/1572-67-0x0000000000400000-0x000000000065E000-memory.dmp

    Filesize

    2.4MB

  • memory/1572-72-0x0000000000400000-0x000000000065E000-memory.dmp

    Filesize

    2.4MB

  • memory/1572-71-0x0000000000400000-0x000000000065E000-memory.dmp

    Filesize

    2.4MB

  • memory/1572-64-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1572-194-0x0000000000400000-0x000000000065E000-memory.dmp

    Filesize

    2.4MB

  • memory/2392-0-0x0000000000360000-0x00000000003F2000-memory.dmp

    Filesize

    584KB

  • memory/2392-3-0x00000000021A0000-0x00000000022BB000-memory.dmp

    Filesize

    1.1MB

  • memory/2392-1-0x0000000000360000-0x00000000003F2000-memory.dmp

    Filesize

    584KB

  • memory/2608-48-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2608-195-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2608-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2608-62-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2608-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2608-49-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2608-199-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2608-73-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2608-197-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2608-198-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2844-29-0x00000000008D0000-0x0000000000962000-memory.dmp

    Filesize

    584KB

  • memory/2844-27-0x00000000008D0000-0x0000000000962000-memory.dmp

    Filesize

    584KB

  • memory/3036-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3036-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/3036-7-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3036-8-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3036-26-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB