Analysis

  • max time kernel
    72s
  • max time network
    135s
  • platform
    windows10-1703_x64
  • resource
    win10-20220901-en
  • resource tags

    arch:x64arch:x86image:win10-20220901-enlocale:en-usos:windows10-1703-x64system
  • submitted
    09/10/2022, 14:02

General

  • Target

    f6772941ad92d79142edd87d77b5169c2887e0abc28561efb6fed056c287fcc0.exe

  • Size

    791KB

  • MD5

    bfd1d31196f7df3a2dd5967a6e4e7e6e

  • SHA1

    cb23db2bb8b778a1f1cc44b49ec6f0f687e61b80

  • SHA256

    f6772941ad92d79142edd87d77b5169c2887e0abc28561efb6fed056c287fcc0

  • SHA512

    692e18395deef89509443001cbcd8bbacfaea2a1a080c63a0c46e27af3c58dbc64678fe7a6102cc6e142f718884eb540464f4be0317e208ea039c32f45a5c144

  • SSDEEP

    12288:23VfnjcfcyK9BnMwXxzRrEEaUz4ic5R09h+3gJmbgdkm4YXJxBqVd:2FfnjPr9BMsz1iUEiORcegJ3km4xV

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .tohj

  • offline_id

    SSHsHMHGmSIhrz50VnIxLJJX15osxEQY6iXedXt1

  • 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-Kbx8mJatqN 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: 0574Jhyjd

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 9 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Downloads MZ/PE file
  • Executes dropped EXE 2 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 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • 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 4 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f6772941ad92d79142edd87d77b5169c2887e0abc28561efb6fed056c287fcc0.exe
    "C:\Users\Admin\AppData\Local\Temp\f6772941ad92d79142edd87d77b5169c2887e0abc28561efb6fed056c287fcc0.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2492
    • C:\Users\Admin\AppData\Local\Temp\f6772941ad92d79142edd87d77b5169c2887e0abc28561efb6fed056c287fcc0.exe
      "C:\Users\Admin\AppData\Local\Temp\f6772941ad92d79142edd87d77b5169c2887e0abc28561efb6fed056c287fcc0.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4832
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\b93d2ff0-2a07-4ae4-b19d-ad02a645ac33" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4340
      • C:\Users\Admin\AppData\Local\Temp\f6772941ad92d79142edd87d77b5169c2887e0abc28561efb6fed056c287fcc0.exe
        "C:\Users\Admin\AppData\Local\Temp\f6772941ad92d79142edd87d77b5169c2887e0abc28561efb6fed056c287fcc0.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4472
        • C:\Users\Admin\AppData\Local\Temp\f6772941ad92d79142edd87d77b5169c2887e0abc28561efb6fed056c287fcc0.exe
          "C:\Users\Admin\AppData\Local\Temp\f6772941ad92d79142edd87d77b5169c2887e0abc28561efb6fed056c287fcc0.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:3172
          • C:\Users\Admin\AppData\Local\4dbb5635-bb07-4104-a273-6b0bbf70f878\build3.exe
            "C:\Users\Admin\AppData\Local\4dbb5635-bb07-4104-a273-6b0bbf70f878\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:4376
            • 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:1056
  • 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:1760
    • 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:4660

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

    Filesize

    2KB

    MD5

    dbd2ef00711b9e8a65a71435dac362a2

    SHA1

    befb6f2c27daebeef7bcd7ed80c9dc50241bf5b6

    SHA256

    5affc8e9407564299e0b7ce1953b921d33dab949c296198ce30781c952e6a047

    SHA512

    500c02a21467c0f04337258c07a1e5f71da3dbbe2105e8e63881fe064bd4ebac7db8347e5a8e554b384237961e3df35513ff14bdc4a409862ac1eca5c35bf378

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

    Filesize

    1KB

    MD5

    4b17013381328e3e6c6496e128289829

    SHA1

    77e65de2b337899996a68241226fd97196d9a73d

    SHA256

    c7cd9f2c74cb78237c3ed4e8f1a42ddc1c03c0f64a0ca70aad4a4af1f7182f71

    SHA512

    3fed91eec2c1c6de1f646b8664859691e15a3f04f17df41033616d609ab166309bd821a1190146535c3976c00b687ea1ab6fe4aa1d235b516bf6a79a29887763

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

    Filesize

    488B

    MD5

    fd51ad3e37ab104ee43a996662a79378

    SHA1

    f891a7ad21da074e9da2224d760abfc280f91e06

    SHA256

    b74ff9a03800aa941b7452aa91cbad52ac405ba534ae922f2712b6b064b34506

    SHA512

    1b7b8acf8b9873af90b7d8ee464632d9cb05207260fe16480d12a92938e7d9bcc6e164845c98bc264f6e281bf276465adf4d6e08d579b2914506ba634c939819

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

    Filesize

    482B

    MD5

    3281357be2a201d5347d5a318d9de69e

    SHA1

    aa87b6ed3b0b36ddc866ddeb0576e9bbe5e5a776

    SHA256

    6e1a2661e46aa07b058dae7ad784b7ff9b1c1c1db878b4e21262ddbe20a2eb98

    SHA512

    8a6f89b01a3a40339a23d1f9314017cb66908097ebed13bdb61e16547ca2d43756a84577c50031bd10ef12516a43153e052eb173e03f29f85bacf08091007458

  • C:\Users\Admin\AppData\Local\4dbb5635-bb07-4104-a273-6b0bbf70f878\build3.exe

    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • C:\Users\Admin\AppData\Local\4dbb5635-bb07-4104-a273-6b0bbf70f878\build3.exe

    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • C:\Users\Admin\AppData\Local\b93d2ff0-2a07-4ae4-b19d-ad02a645ac33\f6772941ad92d79142edd87d77b5169c2887e0abc28561efb6fed056c287fcc0.exe

    Filesize

    791KB

    MD5

    bfd1d31196f7df3a2dd5967a6e4e7e6e

    SHA1

    cb23db2bb8b778a1f1cc44b49ec6f0f687e61b80

    SHA256

    f6772941ad92d79142edd87d77b5169c2887e0abc28561efb6fed056c287fcc0

    SHA512

    692e18395deef89509443001cbcd8bbacfaea2a1a080c63a0c46e27af3c58dbc64678fe7a6102cc6e142f718884eb540464f4be0317e208ea039c32f45a5c144

  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • memory/2492-131-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-149-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-129-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-132-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-133-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-134-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-135-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-136-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-137-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-139-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-138-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-140-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-141-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-143-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-144-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-145-0x00000000022D0000-0x000000000236D000-memory.dmp

    Filesize

    628KB

  • memory/2492-146-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-147-0x0000000002370000-0x000000000248B000-memory.dmp

    Filesize

    1.1MB

  • memory/2492-148-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-130-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-150-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-120-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-121-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-122-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-123-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-124-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-128-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-127-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-125-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/2492-126-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/3172-427-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3172-351-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4472-426-0x00000000021A0000-0x000000000223C000-memory.dmp

    Filesize

    624KB

  • memory/4472-282-0x00000000021A0000-0x000000000223C000-memory.dmp

    Filesize

    624KB

  • memory/4832-159-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-167-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-168-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-164-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-170-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-169-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-171-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-172-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-173-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-174-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-175-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-176-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-178-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-177-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-179-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-180-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-181-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-182-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-183-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-184-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-185-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-186-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-187-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-166-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-165-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-163-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-162-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-161-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-160-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-158-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4832-157-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-156-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-155-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-154-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-153-0x0000000077D90000-0x0000000077F1E000-memory.dmp

    Filesize

    1.6MB

  • memory/4832-151-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4832-199-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4832-251-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB