Analysis

  • max time kernel
    118s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    16-05-2022 20:32

General

  • Target

    004cc8429fcb322e0acf0aadc15313c08cd4f2f56d77229b0f61a6e63d3c60af.exe

  • Size

    707KB

  • MD5

    a97ffe4f4a0109b5c0888b7958fad1e4

  • SHA1

    e1d8944aad86ff8b86f10db20470e7d11e45eceb

  • SHA256

    004cc8429fcb322e0acf0aadc15313c08cd4f2f56d77229b0f61a6e63d3c60af

  • SHA512

    6ceb2f0c605670f405dfc7424163a813c65c5d9f2a0ff9c49f3daa9f544414cde0d87bf6ffc1dd052bd4dc3efcb6915bc83bce35265d3d32865b0214804081f5

Malware Config

Extracted

Family

djvu

C2

http://nokd.top/ydtftysdtyftysdfsdpen3/get.php

Attributes
  • extension

    .opqz

  • offline_id

    zmgd82h65FItjbl56ff6P5GS3sZpZ1qEEGUOW6t1

  • payload_url

    http://nokd.top/files/penelop/updatewin1.exe

    http://nokd.top/files/penelop/updatewin2.exe

    http://nokd.top/files/penelop/updatewin.exe

    http://nokd.top/files/penelop/3.exe

    http://nokd.top/files/penelop/4.exe

    http://nokd.top/files/penelop/5.exe

  • ransomnote

    ATTENTION! Don't worry, you can return all your files! All your files like photos, 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-sBwlEg46JX 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: 0216OIWojlj48

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 3 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • 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.

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\004cc8429fcb322e0acf0aadc15313c08cd4f2f56d77229b0f61a6e63d3c60af.exe
    "C:\Users\Admin\AppData\Local\Temp\004cc8429fcb322e0acf0aadc15313c08cd4f2f56d77229b0f61a6e63d3c60af.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:884
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\8be96c6c-2ce6-474b-97b8-48ec4bde2a37" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:1404
    • C:\Users\Admin\AppData\Local\Temp\004cc8429fcb322e0acf0aadc15313c08cd4f2f56d77229b0f61a6e63d3c60af.exe
      "C:\Users\Admin\AppData\Local\Temp\004cc8429fcb322e0acf0aadc15313c08cd4f2f56d77229b0f61a6e63d3c60af.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:1604

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\3538626A1FCCCA43C7E18F220BDD9B02

    Filesize

    978B

    MD5

    b592e5c624704ea7476cce4abe7445c2

    SHA1

    8ef51330304f98d636990030f73ec2b77c9d0c7a

    SHA256

    ee75f270c3a6c1ff56c8353538a8647de68070334115db73837be882c68ae6a2

    SHA512

    5dae484b9bd226c59e14a52b428f3e96312e7fba02b4c5105591a7615be3e808d54494cfae9d4d09ca64036fdc0e522eb3b85d8c59c4ddf159704df5b999b60e

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

    Filesize

    60KB

    MD5

    b9f21d8db36e88831e5352bb82c438b3

    SHA1

    4a3c330954f9f65a2f5fd7e55800e46ce228a3e2

    SHA256

    998e0209690a48ed33b79af30fc13851e3e3416bed97e3679b6030c10cab361e

    SHA512

    d4a2ac7c14227fbaf8b532398fb69053f0a0d913273f6917027c8cadbba80113fdbec20c2a7eb31b7bb57c99f9fdeccf8576be5f39346d8b564fc72fb1699476

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

    Filesize

    471B

    MD5

    b1c4234d2346ca5a2267de9f0bab4b81

    SHA1

    d6d10976b258ee86430063fdfb1838bb73838aeb

    SHA256

    e75d5e79323e42e337cf188a296db211f5d7dd488d03adf4b1be7836f997e3ed

    SHA512

    8b1d4c34ad847b73d060cb35dba350032be0a8cd82637a5c52805c078ea986ea44446040f588fb4edda4a233e424bdb6dc3ba016b7647936ec4ef4f971ff1e17

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\3538626A1FCCCA43C7E18F220BDD9B02

    Filesize

    274B

    MD5

    df1f549c10370fcc112ea72a67b6d1bf

    SHA1

    152dee3ea0872501b7f85b3ff4b73398d1c1d4b9

    SHA256

    107827371eea06797cb8f4feca31d729c48a3f1357364d276bf88e43f8408801

    SHA512

    510f37d88e63f3b54fce3848745dd3533577fdc11f6be04e280fdd215195b4fe5c4177e65468190955b52f71c6bcae4785a9e7b6dbdcdc3e2b20abad2624969d

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    6cb0026b6dc4b1cc5443d3ff52ad1f13

    SHA1

    0e12ad1a99b97023e56536c1d85b461f075caada

    SHA256

    a6100d11726812998e9351eae732874117b43ec80bfcd45e418b51bf6206eabd

    SHA512

    26911dd8712bd6cb20ff6baa253637cfa14fef8f1dceee741b0353f6566cde2be6a9643eb738b0d5381c59d4cb6f23556ac3859dc369776cf2bcc8f87da2fade

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

    Filesize

    396B

    MD5

    be7e5e1fa9cb8790a0e3314cacf104ca

    SHA1

    62e9ca7e0eab2d2db093495ef4389ccb9a6b1333

    SHA256

    fe457df70888562f3bfd7794f84841aaafbb3b192fae0388ee0adb28371f28f5

    SHA512

    bb497f9f5636aff66bc749ddd8fbcdd3dd4084b2d5412e395970287d886235d3f05c548da43b019ba3b79f37b4e56667fecd97192e70a256c809052adb4581d9

  • C:\Users\Admin\AppData\Local\8be96c6c-2ce6-474b-97b8-48ec4bde2a37\004cc8429fcb322e0acf0aadc15313c08cd4f2f56d77229b0f61a6e63d3c60af.exe

    Filesize

    707KB

    MD5

    a97ffe4f4a0109b5c0888b7958fad1e4

    SHA1

    e1d8944aad86ff8b86f10db20470e7d11e45eceb

    SHA256

    004cc8429fcb322e0acf0aadc15313c08cd4f2f56d77229b0f61a6e63d3c60af

    SHA512

    6ceb2f0c605670f405dfc7424163a813c65c5d9f2a0ff9c49f3daa9f544414cde0d87bf6ffc1dd052bd4dc3efcb6915bc83bce35265d3d32865b0214804081f5

  • memory/884-58-0x0000000000400000-0x0000000000560000-memory.dmp

    Filesize

    1.4MB

  • memory/884-54-0x0000000000220000-0x00000000002B1000-memory.dmp

    Filesize

    580KB

  • memory/884-57-0x0000000001D90000-0x0000000001EAA000-memory.dmp

    Filesize

    1.1MB

  • memory/884-56-0x0000000000220000-0x00000000002B1000-memory.dmp

    Filesize

    580KB

  • memory/884-55-0x0000000075941000-0x0000000075943000-memory.dmp

    Filesize

    8KB

  • memory/1404-59-0x0000000000000000-mapping.dmp

  • memory/1604-62-0x00000000007D0000-0x0000000000861000-memory.dmp

    Filesize

    580KB

  • memory/1604-64-0x00000000007D0000-0x0000000000861000-memory.dmp

    Filesize

    580KB

  • memory/1604-65-0x0000000000400000-0x0000000000560000-memory.dmp

    Filesize

    1.4MB

  • memory/1604-61-0x0000000000000000-mapping.dmp