Analysis

  • max time kernel
    70s
  • max time network
    178s
  • platform
    windows10-1703_x64
  • resource
    win10-20220812-en
  • resource tags

    arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
  • submitted
    20-09-2022 14:12

General

  • Target

    94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe

  • Size

    725KB

  • MD5

    ffb4f45768fd4a36dc6e1bd8863d187a

  • SHA1

    de0c631a2b42181e2980a75e5442f8cd67106d98

  • SHA256

    94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020

  • SHA512

    25ee6c0ea6b70fba955d3746d9d1651d41fcedddd74cc694ff9134af26ba7090fa8704ddff5bea585b411be5b5c4d493cd37f9cac2269d74c6517247db5a7b73

  • SSDEEP

    12288:3xYL/fMS4wmbI13/Yfm2/ctvFJ+1B2Ypxcn0Li4bGpIVeo0J1c0m:3xYL/Ywj13guu8z+1B2YpjQDo0J1c

Malware Config

Extracted

Family

djvu

C2

http://acacaca.org/test3/get.php

Attributes
  • extension

    .mmvb

  • offline_id

    yd6oYv6aBN90yFzTWdZ34sXSXtXiauzOLXZyWht1

  • 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-xuPJqoyzQE 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: 0556Jhyjd

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 8 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Downloads MZ/PE file
  • Executes dropped EXE 4 IoCs
  • 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 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 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.

  • Delays execution with timeout.exe 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 56 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe
    "C:\Users\Admin\AppData\Local\Temp\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1776
    • C:\Users\Admin\AppData\Local\Temp\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe
      "C:\Users\Admin\AppData\Local\Temp\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe"
      2⤵
      • 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\d64f66c0-0793-47bb-9b5a-22b23619a56c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4864
      • C:\Users\Admin\AppData\Local\Temp\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe
        "C:\Users\Admin\AppData\Local\Temp\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2212
        • C:\Users\Admin\AppData\Local\Temp\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe
          "C:\Users\Admin\AppData\Local\Temp\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4264
          • C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build2.exe
            "C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4464
            • C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build2.exe
              "C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:1460
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" 116.203.7.175/c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build2.exe" & del C:\PrograData\*.dll & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:3676
                • C:\Windows\SysWOW64\taskkill.exe
                  taskkill /im build2.exe /f
                  8⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:3592
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:4992
          • C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build3.exe
            "C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:416
            • 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:216
  • 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:3516
    • 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:4592

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build2.exe

    Filesize

    246KB

    MD5

    4e08ecaa075b90f30327bf200d23130b

    SHA1

    f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2

    SHA256

    6c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47

    SHA512

    e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7

  • C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build2.exe

    Filesize

    246KB

    MD5

    4e08ecaa075b90f30327bf200d23130b

    SHA1

    f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2

    SHA256

    6c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47

    SHA512

    e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7

  • C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build2.exe

    Filesize

    246KB

    MD5

    4e08ecaa075b90f30327bf200d23130b

    SHA1

    f7b67a7abbe3815bd758933f7c4712bd4d4ec4b2

    SHA256

    6c11af0bbd346329224255d38a07fb9db5828881d3520ab4623c7a5fc09ecd47

    SHA512

    e7deeafe000b034cd4d71776cd1285e33d295a830f3459506dd7332e8c1c61b43ec2fdc406c22ba5262aa62a795421492f7e54602bfe08102b8b2a000d150bb7

  • C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build3.exe

    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • C:\Users\Admin\AppData\Local\621f767b-2b8f-4f06-ab4f-66c7a608a0c6\build3.exe

    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • C:\Users\Admin\AppData\Local\d64f66c0-0793-47bb-9b5a-22b23619a56c\94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020.exe

    Filesize

    725KB

    MD5

    ffb4f45768fd4a36dc6e1bd8863d187a

    SHA1

    de0c631a2b42181e2980a75e5442f8cd67106d98

    SHA256

    94136673a5a18667fef80833aad6be743b504e9198eb730c3b1fce9dbe8a0020

    SHA512

    25ee6c0ea6b70fba955d3746d9d1651d41fcedddd74cc694ff9134af26ba7090fa8704ddff5bea585b411be5b5c4d493cd37f9cac2269d74c6517247db5a7b73

  • 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

  • \ProgramData\mozglue.dll

    Filesize

    593KB

    MD5

    c8fd9be83bc728cc04beffafc2907fe9

    SHA1

    95ab9f701e0024cedfbd312bcfe4e726744c4f2e

    SHA256

    ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

    SHA512

    fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

  • \ProgramData\nss3.dll

    Filesize

    2.0MB

    MD5

    1cc453cdf74f31e4d913ff9c10acdde2

    SHA1

    6e85eae544d6e965f15fa5c39700fa7202f3aafe

    SHA256

    ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

    SHA512

    dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

  • memory/1460-552-0x0000000000400000-0x000000000045B000-memory.dmp

    Filesize

    364KB

  • memory/1460-505-0x0000000000400000-0x000000000045B000-memory.dmp

    Filesize

    364KB

  • memory/1776-127-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-130-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-134-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-135-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-136-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-137-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-138-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-139-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-140-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-142-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-141-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-144-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-143-0x0000000002E90000-0x0000000002F22000-memory.dmp

    Filesize

    584KB

  • memory/1776-145-0x0000000004900000-0x0000000004A1B000-memory.dmp

    Filesize

    1.1MB

  • memory/1776-131-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-133-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-129-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-128-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-126-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-124-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-125-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-123-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-122-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-121-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-120-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-119-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-118-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-117-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/1776-116-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4264-332-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4752-162-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-170-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-171-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-172-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-173-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-168-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-174-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-175-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-176-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-177-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-178-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-179-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-180-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-181-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-182-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-183-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-211-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4752-163-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-161-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-160-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-247-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4752-169-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-167-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-165-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-159-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-158-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-157-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-156-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-155-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-154-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-153-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4752-151-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-152-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-150-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-149-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-166-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-148-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-164-0x0000000077C40000-0x0000000077DCE000-memory.dmp

    Filesize

    1.6MB

  • memory/4752-146-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB