Analysis

  • max time kernel
    145s
  • max time network
    128s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/04/2023, 21:33

General

  • Target

    cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe

  • Size

    691KB

  • MD5

    e79ef59b625dee8067807985e0506eb5

  • SHA1

    f765ae06a338aa095518b5241d4abc7df33a8ee5

  • SHA256

    cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb

  • SHA512

    7603837f73137a1ba47ad16caddcec0020cf995c642b7b394f22ae2b44b62da439b7128fcad53850d00a0e2f75cdfa1e29f6cc52b5be129942bdbaac4cb68a9c

  • SSDEEP

    12288:p18lxoiEPb9GTLlRRhA8D7Sf0n0jCp/u2GWaEpUUE93o:wnkRGHfA8DWWMChGW+0

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/test2/get.php

Attributes
  • extension

    .kifr

  • offline_id

    iIlWwF8bQ6n1I71JdbwrJ0LNue9L0IeEoD6KAJt1

  • payload_url

    http://uaery.top/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-lEbmgnjBGi 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: 0683JOsie

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 16 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • 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\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe
    "C:\Users\Admin\AppData\Local\Temp\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2492
    • C:\Users\Admin\AppData\Local\Temp\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe
      "C:\Users\Admin\AppData\Local\Temp\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:216
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\b0657715-6aa2-434e-b0d3-17c24b4ec055" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2580
      • C:\Users\Admin\AppData\Local\Temp\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe
        "C:\Users\Admin\AppData\Local\Temp\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2292
        • C:\Users\Admin\AppData\Local\Temp\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe
          "C:\Users\Admin\AppData\Local\Temp\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4552
          • C:\Users\Admin\AppData\Local\e826f779-7360-4b3c-8c61-f6a754a518c3\build3.exe
            "C:\Users\Admin\AppData\Local\e826f779-7360-4b3c-8c61-f6a754a518c3\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:5084
            • 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:3512
  • 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:4104
    • 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:5052

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

    76a44c88579ed3e3d8ab8478d3cbc539

    SHA1

    539ac9f837efb72f7c9131b8974b747e7f65c049

    SHA256

    ba7af773db817754379099994f9bc4447dcdd2c2160137fafc1a4a88f68a89a5

    SHA512

    772aa0b4c0e8816ed1aa6be6ce3de1b62777bf34adc4db5b9c547e00f53112fd4b7c79481f7f10bc72be83fb0298f9c57fdb715dd70292d2bdc1fbe773178558

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

    Filesize

    1KB

    MD5

    c97719e1ef3b8a984fefecd795e00952

    SHA1

    840ddea4fb5b5bd686561ca3773e41ec0bb6eebc

    SHA256

    b2e05305cab46dd563531bf03b63104237845b7279f7b986d8659bf63f3de3a0

    SHA512

    bb24c4e897b044615c19d1d8496d73c8ed2a058d44167099616c9f02707409ca3a50d39ff4a1d644586fbda3bf797f2b62251a631b7379c39f9a912d446c54b0

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

    Filesize

    488B

    MD5

    7bf03746e5467800ae82d5aa17b315f5

    SHA1

    577a65312f362fc6666d3358d58a1d9a3f23f402

    SHA256

    d5be9fbc8eb92d676e4e1bde2d97a62b554b19267eac1e8365cec9a43b3c9fd5

    SHA512

    293db1c5f3deef4ff69d26b1afb6f1eee3e6af3c65bd1adc3a92f5b54b240ad6c79bef98053962075f9d36ebd12d32e1108814a1177dba616dbfa9cb22cf3608

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

    Filesize

    482B

    MD5

    513401542742d99fcd21f6489c664976

    SHA1

    453a5dd3096c4113b732865d4627c98c43286363

    SHA256

    97974ced402c237412a61cb20ffabf653843ef520d132c2110eac7b35124f8a1

    SHA512

    cf3965f5aae96a74c1538be38b89a3238aa38f1ca3a5e3865d766c0a572a9c2f432a8720200489e621f886da97a84ade0ad80580269106d52a9031f9a2bd3dd6

  • C:\Users\Admin\AppData\Local\b0657715-6aa2-434e-b0d3-17c24b4ec055\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe

    Filesize

    691KB

    MD5

    e79ef59b625dee8067807985e0506eb5

    SHA1

    f765ae06a338aa095518b5241d4abc7df33a8ee5

    SHA256

    cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb

    SHA512

    7603837f73137a1ba47ad16caddcec0020cf995c642b7b394f22ae2b44b62da439b7128fcad53850d00a0e2f75cdfa1e29f6cc52b5be129942bdbaac4cb68a9c

  • C:\Users\Admin\AppData\Local\e826f779-7360-4b3c-8c61-f6a754a518c3\build3.exe

    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • C:\Users\Admin\AppData\Local\e826f779-7360-4b3c-8c61-f6a754a518c3\build3.exe

    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • C:\Users\Admin\AppData\Local\e826f779-7360-4b3c-8c61-f6a754a518c3\build3.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

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

    Filesize

    9KB

    MD5

    9ead10c08e72ae41921191f8db39bc16

    SHA1

    abe3bce01cd34afc88e2c838173f8c2bd0090ae1

    SHA256

    8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

    SHA512

    aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

  • memory/216-150-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/216-134-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/216-135-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/216-137-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/216-138-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2492-136-0x0000000002300000-0x000000000241B000-memory.dmp

    Filesize

    1.1MB

  • memory/4552-162-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4552-170-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4552-169-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4552-167-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4552-163-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4552-154-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4552-180-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4552-184-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4552-161-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4552-153-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB