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Analysis

  • max time kernel
    293s
  • max time network
    167s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    07/01/2024, 22:25

General

  • Target

    a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe

  • Size

    737KB

  • MD5

    4be84d2271fde324d48f5364ff65e12f

  • SHA1

    124e6cb72a9340605227da0b4ea958e2e4f69de9

  • SHA256

    a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e

  • SHA512

    f35b53dc32c0d5399a3c35539934baf0acdac9fcd821c69223d1111fa17523e6455fc01ea2b82cfda50b1f6ca905ef4c67d113b5cb3aa66cd5ad0da6bef3f70b

  • SSDEEP

    12288:P4a3i3PM6FctLclDaaS8Myn/QRGURpqipm9rudVZfejbJhNpojv:gAipcmlDtS85IRGUyicrU3WjbJh36

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 8 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 12 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 8 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.

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe
    "C:\Users\Admin\AppData\Local\Temp\a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2864
    • C:\Users\Admin\AppData\Local\Temp\a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe
      "C:\Users\Admin\AppData\Local\Temp\a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2932
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\914994ea-195e-4f86-a262-ddd1b07eae11" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2452
      • C:\Users\Admin\AppData\Local\Temp\a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe
        "C:\Users\Admin\AppData\Local\Temp\a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2520
        • C:\Users\Admin\AppData\Local\Temp\a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe
          "C:\Users\Admin\AppData\Local\Temp\a9bad8d42443a9072a60a91f8a747c9c6221203a6c035ecdae621bc2f4fddf8e.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2156
          • C:\Users\Admin\AppData\Local\7abb0646-c919-4e72-9418-d45d140ca3b5\build2.exe
            "C:\Users\Admin\AppData\Local\7abb0646-c919-4e72-9418-d45d140ca3b5\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1656
            • C:\Users\Admin\AppData\Local\7abb0646-c919-4e72-9418-d45d140ca3b5\build2.exe
              "C:\Users\Admin\AppData\Local\7abb0646-c919-4e72-9418-d45d140ca3b5\build2.exe"
              6⤵
              • Executes dropped EXE
              • Modifies system certificate store
              • Suspicious use of WriteProcessMemory
              PID:1992
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1992 -s 1412
                7⤵
                • Loads dropped DLL
                • Program crash
                PID:2524
          • C:\Users\Admin\AppData\Local\7abb0646-c919-4e72-9418-d45d140ca3b5\build3.exe
            "C:\Users\Admin\AppData\Local\7abb0646-c919-4e72-9418-d45d140ca3b5\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:2432
            • C:\Users\Admin\AppData\Local\7abb0646-c919-4e72-9418-d45d140ca3b5\build3.exe
              "C:\Users\Admin\AppData\Local\7abb0646-c919-4e72-9418-d45d140ca3b5\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:3060
              • 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:2388
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {57603222-CE91-466A-A49B-5A72B6D78780} S-1-5-21-3470981204-343661084-3367201002-1000:GLTGRJAG\Admin:Interactive:[1]
    1⤵
      PID:2764
      • 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:2780
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:1592
          • 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:2756
      • 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:240
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:1500
      • 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:2128
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:2180
      • 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:2504
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:2480

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      344B

      MD5

      d32edbf2ab57545826f0da4fc15d3bd5

      SHA1

      062993c001004317a908207f46a07c6db89ea5b3

      SHA256

      dc2dd2d90bb2ae77bc76c9f040afb7d0bc94ccaf665dbb77dd38492aa49026ff

      SHA512

      f64a6a72ff9d73443125e8ed2105974e8839392503fe3ec88eec061d004d8e657e55b40c32f9dea12f4a0297487a8e72823ea3b847c8e3c44428dee19c2758a0

    • C:\Users\Admin\AppData\Local\7abb0646-c919-4e72-9418-d45d140ca3b5\build2.exe

      Filesize

      92KB

      MD5

      5486dcef9f46fd244d5815c348778325

      SHA1

      229e9fab51dacb873d2f2d9032b5e5d4943d2b2e

      SHA256

      b83ff1a292a3adfed1d4946fd764daba4f9e57644c97b9b8ecbb416b9a889f68

      SHA512

      b98541add19236c5f2a4673f8dcb8a37f5ea989768df89467efb051e15cbfdb86290a1f6639058e59f6919f2e660ae7a121b7a77a14ef87b78456dc2ceae1c3c

    • \Users\Admin\AppData\Local\7abb0646-c919-4e72-9418-d45d140ca3b5\build2.exe

      Filesize

      247KB

      MD5

      1f7efac73d987dae200e36922267d8c6

      SHA1

      a1bb90007d2e00025953c13ca742d767ebcce27e

      SHA256

      5719504e2f4e976c8ce6fbfda399b80273e783ff05f61dfd1f1bd4737f0bde8a

      SHA512

      75ef83a7e079e553a98e60dd73a9eebbaa793ced7bbd8a712a8f7f363349456d12b3766481d03d00f376cf31c4697afd934eb9b29a2e70727a70a9f463d03bed

    • \Users\Admin\AppData\Local\7abb0646-c919-4e72-9418-d45d140ca3b5\build3.exe

      Filesize

      299KB

      MD5

      41b883a061c95e9b9cb17d4ca50de770

      SHA1

      1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

      SHA256

      fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

      SHA512

      cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

    • memory/240-295-0x00000000008F2000-0x0000000000902000-memory.dmp

      Filesize

      64KB

    • memory/1656-107-0x0000000000220000-0x000000000024A000-memory.dmp

      Filesize

      168KB

    • memory/1656-106-0x0000000000CA0000-0x0000000000DA0000-memory.dmp

      Filesize

      1024KB

    • memory/1992-259-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1992-103-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1992-157-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1992-258-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1992-109-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/1992-108-0x0000000000400000-0x000000000063D000-memory.dmp

      Filesize

      2.2MB

    • memory/2128-323-0x00000000009B2000-0x00000000009C2000-memory.dmp

      Filesize

      64KB

    • memory/2156-53-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2156-76-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2156-74-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2156-78-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2156-77-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2156-69-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2156-70-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2156-52-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2156-121-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2432-163-0x0000000000270000-0x0000000000370000-memory.dmp

      Filesize

      1024KB

    • memory/2432-165-0x00000000001B0000-0x00000000001B4000-memory.dmp

      Filesize

      16KB

    • memory/2504-351-0x0000000000932000-0x0000000000942000-memory.dmp

      Filesize

      64KB

    • memory/2520-47-0x0000000000230000-0x00000000002C1000-memory.dmp

      Filesize

      580KB

    • memory/2520-46-0x0000000000230000-0x00000000002C1000-memory.dmp

      Filesize

      580KB

    • memory/2780-278-0x0000000000270000-0x0000000000370000-memory.dmp

      Filesize

      1024KB

    • memory/2780-267-0x0000000000270000-0x0000000000370000-memory.dmp

      Filesize

      1024KB

    • memory/2864-0-0x0000000000220000-0x00000000002B1000-memory.dmp

      Filesize

      580KB

    • memory/2864-5-0x00000000008E0000-0x00000000009FB000-memory.dmp

      Filesize

      1.1MB

    • memory/2864-6-0x0000000000220000-0x00000000002B1000-memory.dmp

      Filesize

      580KB

    • memory/2932-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2932-7-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2932-8-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2932-3-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/2932-44-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3060-168-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB

    • memory/3060-170-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB

    • memory/3060-171-0x0000000000410000-0x0000000000477000-memory.dmp

      Filesize

      412KB

    • memory/3060-164-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB