Analysis

  • max time kernel
    146s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    18-06-2024 10:36

General

  • Target

    bb7b70fcd01eb0903c7ecf2a8a50cbea_JaffaCakes118.exe

  • Size

    713KB

  • MD5

    bb7b70fcd01eb0903c7ecf2a8a50cbea

  • SHA1

    22694b981fe9c6c9bedd6045299b55e564ebf8e8

  • SHA256

    dacddfaece889da8a311107c5923313c6682acce5c718b5ae49550a1e15b24d0

  • SHA512

    64ac24534d043b01dafad22f79af7649443c5dcd809fadeeac7faa08c04b1e73f33230e9f8d2824dfd90bedb30222c61f8490b7ee307ac753b146978a799c54e

  • SSDEEP

    12288:8d8z9JklKqDlVGzfLPQU4dFC19BqR0o8lPFaV0pJVAyp5tAiRmKz:8Wpgc7yFC19Bs+tpJV5RmK

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .kolz

  • offline_id

    hZcC4PEfaqDNIXxy0ProMPOAk3JS3K1JoUqoq0t1

  • 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 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-18R6r7GGG8 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: 0252Ijrfg

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 10 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Renames multiple (160) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Executes dropped EXE 1 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 4 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).

  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bb7b70fcd01eb0903c7ecf2a8a50cbea_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\bb7b70fcd01eb0903c7ecf2a8a50cbea_JaffaCakes118.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1712
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\5e6add8d-0364-4d8a-be8e-16c128433f71" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:2596
    • C:\Users\Admin\AppData\Local\Temp\bb7b70fcd01eb0903c7ecf2a8a50cbea_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\bb7b70fcd01eb0903c7ecf2a8a50cbea_JaffaCakes118.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:2628
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {D6840176-C4D8-45B5-887C-F375E6C7E278} S-1-5-21-3627615824-4061627003-3019543961-1000:SCFGBRBT\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1212
    • C:\Users\Admin\AppData\Local\5e6add8d-0364-4d8a-be8e-16c128433f71\bb7b70fcd01eb0903c7ecf2a8a50cbea_JaffaCakes118.exe
      C:\Users\Admin\AppData\Local\5e6add8d-0364-4d8a-be8e-16c128433f71\bb7b70fcd01eb0903c7ecf2a8a50cbea_JaffaCakes118.exe --Task
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      PID:1488

Network

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

File and Directory Permissions Modification

1
T1222

Modify Registry

2
T1112

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
    Filesize

    1KB

    MD5

    2365869258df7a66a2121b802ca4afd9

    SHA1

    73acc30a2edeb9d6830de559bb8a74f35168135d

    SHA256

    d6b1932822bbd72a8e78c771717d992142348f67d625a42393719fefbe59b0ed

    SHA512

    795004bab536e128dbd81c188976d37c7b650efbfa5a80374df4c65a1049c27658f4620b7605583928eb167fcb69b4c99e4c8730c507b824a7bde9c7fb0e21f4

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

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
    Filesize

    436B

    MD5

    1bfe0a81db078ea084ff82fe545176fe

    SHA1

    50b116f578bd272922fa8eae94f7b02fd3b88384

    SHA256

    5ba8817f13eee00e75158bad93076ab474a068c6b52686579e0f728fda68499f

    SHA512

    37c582f3f09f8d80529608c09041295d1644bcc9de6fb8c4669b05339b0dd870f9525abc5eed53ad06a94b51441275504bc943c336c5beb63b53460ba836ca8d

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357
    Filesize

    1KB

    MD5

    a266bb7dcc38a562631361bbf61dd11b

    SHA1

    3b1efd3a66ea28b16697394703a72ca340a05bd5

    SHA256

    df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e

    SHA512

    0da8ef4f8f6ed3d16d2bc8eb816b9e6e1345dfe2d91160196c47e6149a1d6aedaafadcefd66acdea7f72dcf0832770192ceac15b0c559c4ccc2c0e5581d5aefc

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
    Filesize

    174B

    MD5

    3939e910d0a71e0303db865ec721951a

    SHA1

    3210dec9db4e11fe9f5b4d44b5930736d3e44afe

    SHA256

    7250c110c82aeaddbbcf53a58d20c72407b89b36a650fb74b3253548a838a667

    SHA512

    390fd4b2451191f447c7ef105220dfc22af0c8b46a58e853a17986deacb6eadffa1c05e0a2fc7cd9e06e884f161b4bf8d4edd29cc5983569a8197f5f6152941f

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

    342B

    MD5

    6b639381e891cad9282586fc1cc81c2a

    SHA1

    9b60c8a4142f155f79b8f6275ac2290d6b5fcf23

    SHA256

    19d5d1162c9bc4f930409c54dc5110ddef53eff6890227765b00af240e3e05d2

    SHA512

    c1c14b3c137d471b965d5814c19af45fa10082ba99051d1c3b5ca470f522267017844e16d9f93d347cfdfcbf6f3b21b8dad162fa9ee44a5cd2174e3e21c6839d

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
    Filesize

    170B

    MD5

    375ad03f9d07ff0d19bafcef73b08aa7

    SHA1

    c0047831f56461d2419a0eed169ad169751df663

    SHA256

    c05edd53fc05531b505c1e64c3ceda9ac7004dcadfe7a01a0fd9df62951b9dfb

    SHA512

    bb07e1e76cbeaa134fc5ba20c7eda97af2bc139147241012952a792f6a1879e5129e53a407443a47b9f955e09c5dae4915fd022c7515676e80f6c33f4a48026c

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357
    Filesize

    242B

    MD5

    7fdb60b35c4453c628b5b8d6cf415396

    SHA1

    e7946a947213238c9e85958f12dcff6cc4c54abf

    SHA256

    ee3bfc81e5fbe40ad8df8a1216b8cdcc858fecdfc868845245069f5653714f38

    SHA512

    736a8eaf86e3e30202aa597b5415ca3cd16aca2e37dea2475e2a4c5be12b6c8ee103bdd2fe7583c7750e089932ae39b4413dbb054a9b5614b8cbc3309bed8b22

  • C:\Users\Admin\AppData\Local\5e6add8d-0364-4d8a-be8e-16c128433f71\bb7b70fcd01eb0903c7ecf2a8a50cbea_JaffaCakes118.exe
    Filesize

    713KB

    MD5

    bb7b70fcd01eb0903c7ecf2a8a50cbea

    SHA1

    22694b981fe9c6c9bedd6045299b55e564ebf8e8

    SHA256

    dacddfaece889da8a311107c5923313c6682acce5c718b5ae49550a1e15b24d0

    SHA512

    64ac24534d043b01dafad22f79af7649443c5dcd809fadeeac7faa08c04b1e73f33230e9f8d2824dfd90bedb30222c61f8490b7ee307ac753b146978a799c54e

  • C:\Users\Admin\AppData\Local\Temp\Tar316D.tmp
    Filesize

    181KB

    MD5

    4ea6026cf93ec6338144661bf1202cd1

    SHA1

    a1dec9044f750ad887935a01430bf49322fbdcb7

    SHA256

    8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

    SHA512

    6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

  • memory/1488-87-0x0000000000400000-0x0000000002830000-memory.dmp
    Filesize

    36.2MB

  • memory/1488-76-0x0000000002930000-0x00000000029C1000-memory.dmp
    Filesize

    580KB

  • memory/1712-43-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1712-42-0x00000000028D0000-0x00000000029EA000-memory.dmp
    Filesize

    1.1MB

  • memory/1712-41-0x0000000000400000-0x0000000002830000-memory.dmp
    Filesize

    36.2MB

  • memory/1712-0-0x0000000002830000-0x00000000028C1000-memory.dmp
    Filesize

    580KB

  • memory/1712-3-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1712-2-0x00000000028D0000-0x00000000029EA000-memory.dmp
    Filesize

    1.1MB

  • memory/1712-1-0x0000000002830000-0x00000000028C1000-memory.dmp
    Filesize

    580KB

  • memory/2628-44-0x0000000000220000-0x00000000002B1000-memory.dmp
    Filesize

    580KB

  • memory/2628-62-0x0000000000400000-0x0000000002830000-memory.dmp
    Filesize

    36.2MB

  • memory/2628-64-0x0000000000400000-0x0000000002830000-memory.dmp
    Filesize

    36.2MB

  • memory/2628-66-0x0000000000400000-0x0000000002830000-memory.dmp
    Filesize

    36.2MB

  • memory/2628-414-0x0000000000400000-0x0000000002830000-memory.dmp
    Filesize

    36.2MB