Analysis

  • max time kernel
    182s
  • max time network
    191s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 10:46

General

  • Target

    d323c8c35817f7c9d6691ba07433a71816e18bb2ed7a7e468bc7c4536cf4db18.exe

  • Size

    681KB

  • MD5

    84174a142d30afe6075d57a1aead4d18

  • SHA1

    330dfeed26f3ac123aa182fd28751144ea9b097a

  • SHA256

    d323c8c35817f7c9d6691ba07433a71816e18bb2ed7a7e468bc7c4536cf4db18

  • SHA512

    f65c51eaf55b1ecbbb3a82f9bab0b5428f04727fbc7795679eb6c127847eb668259bf3fe406b35e6e36902b653d28c33449caec882677b24f95daab7e44f9866

Malware Config

Extracted

Family

djvu

C2

http://cjto.top/nddddhsspen6/get.php

Attributes
  • extension

    .geno

  • offline_id

    Gq9C3wfB3EovXBFkGxv1b5wkUKUxVy1x63fasTt1

  • payload_url

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

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

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

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

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

    http://cjto.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-ZLZ4pVnuS4 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: helpmanager@mail.ch Reserve e-mail address to contact us: restoremanager@airmail.cc Your personal ID: 0248Oowhu34

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 3 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • suricata: ET MALWARE APT-C-23 Activity (GET)

    suricata: ET MALWARE APT-C-23 Activity (GET)

  • suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

    suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

  • suricata: ET MALWARE Win32/Filecoder.STOP Variant Request for Public Key

    suricata: ET MALWARE Win32/Filecoder.STOP Variant Request for Public Key

  • suricata: ET MALWARE Win32/Vodkagats Loader Requesting Payload

    suricata: ET MALWARE Win32/Vodkagats Loader Requesting Payload

  • 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 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d323c8c35817f7c9d6691ba07433a71816e18bb2ed7a7e468bc7c4536cf4db18.exe
    "C:\Users\Admin\AppData\Local\Temp\d323c8c35817f7c9d6691ba07433a71816e18bb2ed7a7e468bc7c4536cf4db18.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1944
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\dc9fa877-534c-46e5-a02e-481a58c42de7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:1772
    • C:\Users\Admin\AppData\Local\Temp\d323c8c35817f7c9d6691ba07433a71816e18bb2ed7a7e468bc7c4536cf4db18.exe
      "C:\Users\Admin\AppData\Local\Temp\d323c8c35817f7c9d6691ba07433a71816e18bb2ed7a7e468bc7c4536cf4db18.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:296

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

File Permissions Modification

1
T1222

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

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

    727B

    MD5

    93995ad095112907cfc088998c161574

    SHA1

    518c7127e11809bb74ff0f68ea7e86ea5aebc798

    SHA256

    fd16d238bcac3441688e7ca940c27bb02df8f0bf43b26d8e551414a18748c1cc

    SHA512

    c2a3153c65f0acbc821bf663b38591821402d9a00680e2e22f410bf1735752194c08b96f77b7e6712082584a8b6605f7ab9552ad2f6c193fbd13c90bb60436e9

  • 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

    c04f441d0220712231531a90823834db

    SHA1

    68dd18f1e0c51f1fdc4621394091a2dad08e4a08

    SHA256

    055641d3987ae98e2dd627d3214ea8084ae773a3df9592191b86977c752a29e7

    SHA512

    3156cf79585a45d919d4b27da4fe860f06e3206961fe1d20347ad74ef17de81c47857f35acd5cda3fae5ade28ab9747529ea3e8e79ca80aaf98e1f0e852bed53

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

    402B

    MD5

    38787db7056900db74db9e297e55d328

    SHA1

    38d961750c3cac347bed5a948ff04e6e33bcba15

    SHA256

    b858f0ba4d38897aa5c5e3c16e70a8e3fe28ad7b7e2fea846f07be9fb7e925c7

    SHA512

    9be083f6f5af56fcb4aecee2bcc1299b1c778d1294d469adeb03ed4ee24c95ca7b058747c6c0ceaa6c8435a19de6a78cc9255823669135d740c2b8653495267a

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

    344B

    MD5

    f762b5213eec4eb9762bd61049875533

    SHA1

    613d7d2aba63ad80d7d1143853622c14f8c28565

    SHA256

    9c7bf464eb2cc7788a8c138a7322976f47346560dc4e501f7a15d1b847a25349

    SHA512

    44d98227e2cddab951c0b6f6bacbda88cc9b89073be0ffc3c035b711a41e171a872f79b76d74a7f18a477a5e6f3d3bfdaed1934da83c5cbe37e7df9f33907a55

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

    396B

    MD5

    8ec8e7d17e398953bc9ef11141a7211a

    SHA1

    80ceed4cb5c6d2c86a33b3ed6b0745e7555a9333

    SHA256

    a744893f52cabbc1260e7ac47db09330be2669db3067457b788437d169f4cd14

    SHA512

    63300534dbadf6e0c06e2ccaf9e15441454152bbccaf35ba366995a34fba7b75fb6fc4aade3f158cf5e4cf02635cb18e8dcc6b3bf6b2385da0f6ae551c477a49

  • C:\Users\Admin\AppData\Local\dc9fa877-534c-46e5-a02e-481a58c42de7\d323c8c35817f7c9d6691ba07433a71816e18bb2ed7a7e468bc7c4536cf4db18.exe
    Filesize

    681KB

    MD5

    84174a142d30afe6075d57a1aead4d18

    SHA1

    330dfeed26f3ac123aa182fd28751144ea9b097a

    SHA256

    d323c8c35817f7c9d6691ba07433a71816e18bb2ed7a7e468bc7c4536cf4db18

    SHA512

    f65c51eaf55b1ecbbb3a82f9bab0b5428f04727fbc7795679eb6c127847eb668259bf3fe406b35e6e36902b653d28c33449caec882677b24f95daab7e44f9866

  • memory/296-62-0x00000000002A0000-0x0000000000331000-memory.dmp
    Filesize

    580KB

  • memory/296-61-0x0000000000000000-mapping.dmp
  • memory/296-70-0x00000000002A0000-0x0000000000331000-memory.dmp
    Filesize

    580KB

  • memory/296-71-0x0000000000400000-0x0000000005DE8000-memory.dmp
    Filesize

    89.9MB

  • memory/1772-59-0x0000000000000000-mapping.dmp
  • memory/1944-54-0x0000000000340000-0x00000000003D1000-memory.dmp
    Filesize

    580KB

  • memory/1944-58-0x0000000000400000-0x0000000005DE8000-memory.dmp
    Filesize

    89.9MB

  • memory/1944-56-0x0000000000340000-0x00000000003D1000-memory.dmp
    Filesize

    580KB

  • memory/1944-57-0x0000000007720000-0x000000000783A000-memory.dmp
    Filesize

    1.1MB

  • memory/1944-55-0x0000000075801000-0x0000000075803000-memory.dmp
    Filesize

    8KB