Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/10/2022, 08:41

General

  • Target
    11123b38b1013675616c9c50a8377a2a.exe
  • Size 729KB
  • Sample221013-klez1sbdek
  • SHA256 9e9f4e923ecd77b81a6d460031069c4a16ca9f79e534043d8aadfe3416257790
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • djvu

C2
  • http://winnlinne.com/test1/get.php

Attributes
  • extension

    .pohj

  • offline_id

    tHl9RvVtHhFQisMomKMdXzz2soNLhV0cuok85it1

  • payload_url

    http://rgyui.top/dl/build2.exe

    http://winnlinne.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-oTIha7SI4s 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: 0578Jhyjd

rsa_pubkey.plain

Extracted

Family
  • vidar

Version
  • 55

Botnet
  • 517

C2
  • https://t.me/truewallets

  • https://mas.to/@zara99

  • http://116.203.10.3:80

Attributes
  • profile_id

    517

Signatures

  • Detected Djvu ransomware 10 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 4 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Loads dropped DLL 2 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • 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). Likely ransomware behaviour.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • 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 6 IoCs
  • Suspicious use of WriteProcessMemory 46 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\11123b38b1013675616c9c50a8377a2a.exe
    "C:\Users\Admin\AppData\Local\Temp\11123b38b1013675616c9c50a8377a2a.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2396
    • C:\Users\Admin\AppData\Local\Temp\11123b38b1013675616c9c50a8377a2a.exe
      "C:\Users\Admin\AppData\Local\Temp\11123b38b1013675616c9c50a8377a2a.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4752
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\f5ea2d4f-0243-4af9-97c1-daf16a47a4ad" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2068
      • C:\Users\Admin\AppData\Local\Temp\11123b38b1013675616c9c50a8377a2a.exe
        "C:\Users\Admin\AppData\Local\Temp\11123b38b1013675616c9c50a8377a2a.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2476
        • C:\Users\Admin\AppData\Local\Temp\11123b38b1013675616c9c50a8377a2a.exe
          "C:\Users\Admin\AppData\Local\Temp\11123b38b1013675616c9c50a8377a2a.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2736
          • C:\Users\Admin\AppData\Local\df7d5bc9-b323-473d-abb1-71cfb2468dbd\build2.exe
            "C:\Users\Admin\AppData\Local\df7d5bc9-b323-473d-abb1-71cfb2468dbd\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:3184
            • C:\Users\Admin\AppData\Local\df7d5bc9-b323-473d-abb1-71cfb2468dbd\build2.exe
              "C:\Users\Admin\AppData\Local\df7d5bc9-b323-473d-abb1-71cfb2468dbd\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              PID:3492
          • C:\Users\Admin\AppData\Local\df7d5bc9-b323-473d-abb1-71cfb2468dbd\build3.exe
            "C:\Users\Admin\AppData\Local\df7d5bc9-b323-473d-abb1-71cfb2468dbd\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:1984
            • 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"
              6⤵
              • Creates scheduled task(s)
              PID:4408
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:4108
    • 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"
      2⤵
      • Creates scheduled task(s)
      PID:4220

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        mozglue.dll

        • Path C:\ProgramData\mozglue.dll
        • Size 593KB
        • SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
        • MD5 SHA1 SHA512 SSDEEP

        nss3.dll

        • Path C:\ProgramData\nss3.dll
        • Size 2.0MB
        • SHA256 ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
        • MD5 SHA1 SHA512 SSDEEP

        07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
        • Size 2KB
        • SHA256 cef9e0d09bcefec36de16ecca1a53665018bae69aac8c5350e5e74594574b877
        • MD5 SHA1 SHA512

        B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
        • Size 1KB
        • SHA256 263292040d77903899257c1d21201dc64d6f8d6b5a1d945cd5b28d0124d7906c
        • MD5 SHA1 SHA512

        07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
        • Size 488B
        • SHA256 f123917641973c1ee06f344af6b8b7f708d83773578654d19d8e28a7c9cb5d6b
        • MD5 SHA1 SHA512

        B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
        • Size 482B
        • SHA256 1b8075a4d1918dd1b085455d3bacbae5c9d5feee05e302a15c53122415e09458
        • MD5 SHA1 SHA512

        build2.exe

        • Path C:\Users\Admin\AppData\Local\df7d5bc9-b323-473d-abb1-71cfb2468dbd\build2.exe
        • Size 321KB
        • SHA256 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\df7d5bc9-b323-473d-abb1-71cfb2468dbd\build2.exe
        • Size 321KB
        • SHA256 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\df7d5bc9-b323-473d-abb1-71cfb2468dbd\build2.exe
        • Size 321KB
        • SHA256 2a5101345def285c8f52ad39f00261ba9e0375d3de73206d0b8c72ce3b6259c6
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\df7d5bc9-b323-473d-abb1-71cfb2468dbd\build3.exe
        • Size 9KB
        • SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\df7d5bc9-b323-473d-abb1-71cfb2468dbd\build3.exe
        • Size 9KB
        • SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
        • MD5 SHA1 SHA512 SSDEEP

        11123b38b1013675616c9c50a8377a2a.exe

        • Path C:\Users\Admin\AppData\Local\f5ea2d4f-0243-4af9-97c1-daf16a47a4ad\11123b38b1013675616c9c50a8377a2a.exe
        • Size 729KB
        • SHA256 9e9f4e923ecd77b81a6d460031069c4a16ca9f79e534043d8aadfe3416257790
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 9KB
        • SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 9KB
        • SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
        • MD5 SHA1 SHA512 SSDEEP

        memory/2396-135-0x00000000023B6000-0x0000000002448000-memory.dmp

        memory/2396-136-0x0000000002450000-0x000000000256B000-memory.dmp

        memory/2476-146-0x0000000002285000-0x0000000002317000-memory.dmp

        memory/2736-152-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2736-147-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2736-145-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2736-168-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3184-162-0x0000000000730000-0x000000000077F000-memory.dmp

        memory/3184-161-0x000000000064D000-0x0000000000679000-memory.dmp

        memory/3492-187-0x0000000000400000-0x0000000000463000-memory.dmp

        memory/3492-160-0x0000000000400000-0x0000000000463000-memory.dmp

        memory/3492-163-0x0000000000400000-0x0000000000463000-memory.dmp

        memory/3492-157-0x0000000000400000-0x0000000000463000-memory.dmp

        memory/3492-169-0x0000000061E00000-0x0000000061EF3000-memory.dmp

        memory/4752-142-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4752-138-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4752-137-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4752-134-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4752-133-0x0000000000400000-0x0000000000537000-memory.dmp