Analysis

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

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/09/2022, 15:24

General

  • Target
    fd041824c9a24a74ad4234ba3166f4f3.exe
  • Size 281KB
  • Sample220903-ss2flaghfr
  • SHA256 3a01ee284a393305779a8d7927d719873ac41ef42971fd9b719fff5331aa67f2
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • djvu

C2
  • http://acacaca.org/lancer/get.php

Attributes
  • extension

    .oodt

  • offline_id

    6GXhR4uyHH9NXT2qot14T0HeNSviNKH0Q6PGVNt1

  • payload_url

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

    http://acacaca.org/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-6g0MALAb7E 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: 0553ooTs

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 11 IoCs
  • Detects Smokeloader packer 1 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Downloads MZ/PE file
  • Executes dropped EXE 8 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • 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 2 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 SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 26 IoCs
  • Suspicious use of WriteProcessMemory 47 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fd041824c9a24a74ad4234ba3166f4f3.exe
    "C:\Users\Admin\AppData\Local\Temp\fd041824c9a24a74ad4234ba3166f4f3.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:5100
  • C:\Users\Admin\AppData\Local\Temp\B1FA.exe
    C:\Users\Admin\AppData\Local\Temp\B1FA.exe
    1⤵
    • Executes dropped EXE
    PID:4976
  • C:\Users\Admin\AppData\Local\Temp\20A3.exe
    C:\Users\Admin\AppData\Local\Temp\20A3.exe
    1⤵
    • Executes dropped EXE
    PID:1836
  • C:\Users\Admin\AppData\Local\Temp\3D83.exe
    C:\Users\Admin\AppData\Local\Temp\3D83.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:624
    • C:\Users\Admin\AppData\Local\Temp\3D83.exe
      C:\Users\Admin\AppData\Local\Temp\3D83.exe
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:3788
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\ad7e441e-e34c-4e90-b5da-c0c1f565752b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1936
      • C:\Users\Admin\AppData\Local\Temp\3D83.exe
        "C:\Users\Admin\AppData\Local\Temp\3D83.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:5024
        • C:\Users\Admin\AppData\Local\Temp\3D83.exe
          "C:\Users\Admin\AppData\Local\Temp\3D83.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Executes dropped EXE
          • Checks computer location settings
          • Suspicious use of WriteProcessMemory
          PID:2500
          • C:\Users\Admin\AppData\Local\e946cf7f-4c54-4931-af89-53dc1719fb4f\build2.exe
            "C:\Users\Admin\AppData\Local\e946cf7f-4c54-4931-af89-53dc1719fb4f\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:32
            • C:\Users\Admin\AppData\Local\e946cf7f-4c54-4931-af89-53dc1719fb4f\build2.exe
              "C:\Users\Admin\AppData\Local\e946cf7f-4c54-4931-af89-53dc1719fb4f\build2.exe"
              6⤵
              • Executes dropped EXE
              PID:4520

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        20A3.exe

        • Path C:\Users\Admin\AppData\Local\Temp\20A3.exe
        • Size 607KB
        • SHA256 c4a6b8ff9202be747aa1b2d663fec1c94f5d3fc856ce24785d3b03070f7561c7
        • MD5 SHA1 SHA512 SSDEEP

        20A3.exe

        • Path C:\Users\Admin\AppData\Local\Temp\20A3.exe
        • Size 607KB
        • SHA256 c4a6b8ff9202be747aa1b2d663fec1c94f5d3fc856ce24785d3b03070f7561c7
        • MD5 SHA1 SHA512 SSDEEP

        3D83.exe

        • Path C:\Users\Admin\AppData\Local\Temp\3D83.exe
        • Size 800KB
        • SHA256 e74bd1d65cbc20b7c8505bee872d724018e42947cf3445401e48ab3136d2d38c
        • MD5 SHA1 SHA512 SSDEEP

        3D83.exe

        • Path C:\Users\Admin\AppData\Local\Temp\3D83.exe
        • Size 800KB
        • SHA256 e74bd1d65cbc20b7c8505bee872d724018e42947cf3445401e48ab3136d2d38c
        • MD5 SHA1 SHA512 SSDEEP

        3D83.exe

        • Path C:\Users\Admin\AppData\Local\Temp\3D83.exe
        • Size 800KB
        • SHA256 e74bd1d65cbc20b7c8505bee872d724018e42947cf3445401e48ab3136d2d38c
        • MD5 SHA1 SHA512 SSDEEP

        3D83.exe

        • Path C:\Users\Admin\AppData\Local\Temp\3D83.exe
        • Size 800KB
        • SHA256 e74bd1d65cbc20b7c8505bee872d724018e42947cf3445401e48ab3136d2d38c
        • MD5 SHA1 SHA512 SSDEEP

        3D83.exe

        • Path C:\Users\Admin\AppData\Local\Temp\3D83.exe
        • Size 800KB
        • SHA256 e74bd1d65cbc20b7c8505bee872d724018e42947cf3445401e48ab3136d2d38c
        • MD5 SHA1 SHA512 SSDEEP

        B1FA.exe

        • Path C:\Users\Admin\AppData\Local\Temp\B1FA.exe
        • Size 607KB
        • SHA256 c4a6b8ff9202be747aa1b2d663fec1c94f5d3fc856ce24785d3b03070f7561c7
        • MD5 SHA1 SHA512 SSDEEP

        B1FA.exe

        • Path C:\Users\Admin\AppData\Local\Temp\B1FA.exe
        • Size 607KB
        • SHA256 c4a6b8ff9202be747aa1b2d663fec1c94f5d3fc856ce24785d3b03070f7561c7
        • MD5 SHA1 SHA512 SSDEEP

        3D83.exe

        • Path C:\Users\Admin\AppData\Local\ad7e441e-e34c-4e90-b5da-c0c1f565752b\3D83.exe
        • Size 800KB
        • SHA256 e74bd1d65cbc20b7c8505bee872d724018e42947cf3445401e48ab3136d2d38c
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\e946cf7f-4c54-4931-af89-53dc1719fb4f\build2.exe
        • Size 399KB
        • SHA256 d1791b145856b086aef6e658277846f1b153183d9f7411b63f8611e45514ebc1
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\e946cf7f-4c54-4931-af89-53dc1719fb4f\build2.exe
        • Size 399KB
        • SHA256 d1791b145856b086aef6e658277846f1b153183d9f7411b63f8611e45514ebc1
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\e946cf7f-4c54-4931-af89-53dc1719fb4f\build2.exe
        • Size 399KB
        • SHA256 d1791b145856b086aef6e658277846f1b153183d9f7411b63f8611e45514ebc1
        • MD5 SHA1 SHA512 SSDEEP

        memory/32-177-0x0000000002F00000-0x0000000002F49000-memory.dmp

        memory/32-175-0x0000000002F8D000-0x0000000002FB9000-memory.dmp

        memory/624-150-0x00000000026C0000-0x00000000027DB000-memory.dmp

        memory/624-148-0x00000000009D7000-0x0000000000A68000-memory.dmp

        memory/2500-165-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2500-163-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2500-162-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2500-170-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3788-152-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3788-157-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3788-146-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3788-149-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3788-151-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4520-172-0x0000000000400000-0x000000000045D000-memory.dmp

        memory/4520-174-0x0000000000400000-0x000000000045D000-memory.dmp

        memory/4520-176-0x0000000000400000-0x000000000045D000-memory.dmp

        memory/4520-178-0x0000000000400000-0x000000000045D000-memory.dmp

        memory/5024-161-0x0000000002522000-0x00000000025B3000-memory.dmp

        memory/5024-169-0x0000000002630000-0x000000000274B000-memory.dmp

        memory/5100-135-0x0000000000400000-0x0000000000849000-memory.dmp

        memory/5100-133-0x00000000008C0000-0x00000000008C9000-memory.dmp

        memory/5100-134-0x0000000000400000-0x0000000000849000-memory.dmp

        memory/5100-132-0x0000000000A58000-0x0000000000A68000-memory.dmp