Analysis

  • max time kernel
    294s
  • max time network
    246s
  • platform
    windows10-1703_x64
  • resource
    win10-20240221-en
  • resource tags

    arch:x64arch:x86image:win10-20240221-enlocale:en-usos:windows10-1703-x64system
  • submitted
    15/03/2024, 00:59

General

  • Target

    1f5ae695f8e423da25f7247410119055e1834f05946bd5e9e2541fd16d58dedb.exe

  • Size

    736KB

  • MD5

    6bd4412c317dafc8c0de886c4553ea57

  • SHA1

    5a846c63e58110aec0076f2fb301861b561c5888

  • SHA256

    1f5ae695f8e423da25f7247410119055e1834f05946bd5e9e2541fd16d58dedb

  • SHA512

    893d4d8703fdacf661fb0859af2a9c13afc003df42b3f4259745b911a6f39f9196fecf9616474f5975f560a8cde286c942ccca6f28b923f74ded213a2b94872e

  • SSDEEP

    12288:WOaU5Y0+wR9ef6zDRmOzuWDu/maYis9AOfLRkvvezLaGgTlOj2LXpv:5an0+IkSzDRXiWEmam9AyLR0vezeGqlr

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .kool

  • offline_id

    4p0Nzrg1q0ND5of5Gtp2UBjthSXuE8VxnMrd4vt1

  • payload_url

    http://sdfjhuz.com/dl/build2.exe

    http://sajdfue.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. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/a832401adcd58098c699f768ffea4f1720240305114308/7e601a Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. 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: 0856PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 19 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Downloads MZ/PE file
  • Executes dropped EXE 10 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 7 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1f5ae695f8e423da25f7247410119055e1834f05946bd5e9e2541fd16d58dedb.exe
    "C:\Users\Admin\AppData\Local\Temp\1f5ae695f8e423da25f7247410119055e1834f05946bd5e9e2541fd16d58dedb.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3836
    • C:\Users\Admin\AppData\Local\Temp\1f5ae695f8e423da25f7247410119055e1834f05946bd5e9e2541fd16d58dedb.exe
      "C:\Users\Admin\AppData\Local\Temp\1f5ae695f8e423da25f7247410119055e1834f05946bd5e9e2541fd16d58dedb.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4628
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\7c9d8581-453b-4523-9a98-7ffe23324f8e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1444
      • C:\Users\Admin\AppData\Local\Temp\1f5ae695f8e423da25f7247410119055e1834f05946bd5e9e2541fd16d58dedb.exe
        "C:\Users\Admin\AppData\Local\Temp\1f5ae695f8e423da25f7247410119055e1834f05946bd5e9e2541fd16d58dedb.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1740
        • C:\Users\Admin\AppData\Local\Temp\1f5ae695f8e423da25f7247410119055e1834f05946bd5e9e2541fd16d58dedb.exe
          "C:\Users\Admin\AppData\Local\Temp\1f5ae695f8e423da25f7247410119055e1834f05946bd5e9e2541fd16d58dedb.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2456
          • C:\Users\Admin\AppData\Local\47184ebd-a31b-48ba-bd62-4f3cabe19276\build3.exe
            "C:\Users\Admin\AppData\Local\47184ebd-a31b-48ba-bd62-4f3cabe19276\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:884
            • C:\Users\Admin\AppData\Local\47184ebd-a31b-48ba-bd62-4f3cabe19276\build3.exe
              "C:\Users\Admin\AppData\Local\47184ebd-a31b-48ba-bd62-4f3cabe19276\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:4948
              • 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"
                7⤵
                • Creates scheduled task(s)
                PID:3144
  • 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 SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2028
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:2904
      • 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"
        3⤵
        • Creates scheduled task(s)
        PID:1276
  • 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 SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:756
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:4176
  • 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 SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4476
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:1444
  • 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 SetThreadContext
    PID:1836
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:4720

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

    Filesize

    1KB

    MD5

    d67fa48cf6cf5f1818b732ea24db1d6e

    SHA1

    44858909775b98c384307149a53b231f084427f6

    SHA256

    1dd5acc0e95a7e0a6eea0ce7e4ab2665c928db84a241f4006a06791343b84d27

    SHA512

    c89132c4ac4a3e34e37ba33d98347af7c6a0394eceafb043cfd99e5d41d68575287cc537831a3f42924c975f7716aa0c531c6f619fac2df1c17daca658b926a6

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

    Filesize

    724B

    MD5

    8202a1cd02e7d69597995cabbe881a12

    SHA1

    8858d9d934b7aa9330ee73de6c476acf19929ff6

    SHA256

    58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

    SHA512

    97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

    Filesize

    410B

    MD5

    2f36a930afe88e976333157c1e972336

    SHA1

    d84a6be7ec081a44b7473f947fab536ad7e667e4

    SHA256

    570e644c48ac80d38a5694ae66fb1bf7c5de91a69c19a9271cf7ad1a411b4dd5

    SHA512

    d39e8a897d43dc96fe583bf13ea6bc364a9aa21d3b6cbeeb27284551660384b166ef80bcf1e61e40c5969cabbbd0c1e626dff50629928b3a2c0f80698d50cc9b

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

    Filesize

    392B

    MD5

    93ccd2e12b110493c725f344b3711891

    SHA1

    8893d3068e4c61d8453a3ea03be9a68c83a2c6b2

    SHA256

    a779e6252337a68b20a33c26da5ebdce71970afd28d56a3cd5c391adec8990e0

    SHA512

    20df26af042959e4e48cb50beb170308806775313552055747e6fb08a49f39df85cdc880e967eed18b108809f412e479e765d7e297d9dfb9891b03f0e1cdff1f

  • C:\Users\Admin\AppData\Local\47184ebd-a31b-48ba-bd62-4f3cabe19276\build2.exe

    Filesize

    32KB

    MD5

    da0967ee9528abe3f11d1c6acaa8b190

    SHA1

    75f3333b5833718d67fdba8622578c97aaebfc3a

    SHA256

    83f7572e37857d7e7b763e3cd5deec36b24d97fd00d657744c671d65283d23d6

    SHA512

    e145fdab1e0c30d438e5d34b589705497eddfb6040a727dd1d7eb84bceb44cb4fc38b6fc0eb519b13ab5d4b5200f4cf271c365f0c64c281c4d6fb340818a540c

  • C:\Users\Admin\AppData\Local\47184ebd-a31b-48ba-bd62-4f3cabe19276\build3.exe

    Filesize

    299KB

    MD5

    41b883a061c95e9b9cb17d4ca50de770

    SHA1

    1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

    SHA256

    fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

    SHA512

    cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

  • C:\Users\Admin\AppData\Local\47184ebd-a31b-48ba-bd62-4f3cabe19276\build3.exe

    Filesize

    68KB

    MD5

    1ae36d0d02f276e29d59254f34dd3b00

    SHA1

    c2d66f86a5ed5e7c471cd6a0c7ec4fdf44009317

    SHA256

    43517cd8f10171e61f2da1edd0e5d28b677120dc0d80c6e878ac091d98c4deda

    SHA512

    bac5e594774f29b9f02105eafd5486d3353b5d7870f043e54240a7d8a1fbd60643e7a6be59532b19c1445cef619757b36a4adfa034f599653551003662956446

  • C:\Users\Admin\AppData\Local\7c9d8581-453b-4523-9a98-7ffe23324f8e\1f5ae695f8e423da25f7247410119055e1834f05946bd5e9e2541fd16d58dedb.exe

    Filesize

    736KB

    MD5

    6bd4412c317dafc8c0de886c4553ea57

    SHA1

    5a846c63e58110aec0076f2fb301861b561c5888

    SHA256

    1f5ae695f8e423da25f7247410119055e1834f05946bd5e9e2541fd16d58dedb

    SHA512

    893d4d8703fdacf661fb0859af2a9c13afc003df42b3f4259745b911a6f39f9196fecf9616474f5975f560a8cde286c942ccca6f28b923f74ded213a2b94872e

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

    Filesize

    74KB

    MD5

    def9fb4ebfa47ddd37dbfe0baf829729

    SHA1

    4e64f2829e42a1be18df2e00c58e61549badc02d

    SHA256

    48e2d4986d44d4d3407c0636246335c993ab0783870f2c3ca102085b9edfb65b

    SHA512

    44418fa961c18c508c56b99f51a721366485c70b636dc302b6757ce86257beec3768b676797b01706207eedd8fe46eaff4cc6d92c4c2090387754b2cc692ffb0

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

    Filesize

    59KB

    MD5

    ed813c2ac91c12bab5a238d08e4ba218

    SHA1

    e35ee6c83161ec5f9165fd0ce871a45d88d7d117

    SHA256

    8a224e8c33823aa928340038e593cdb3f9f8fdb0816e90d0585da9cc583eeaff

    SHA512

    8e19d39d1c4537fa8c79e9d7d55d77dff99c8158f4be1228d65939fb7f383264884507448bad3d69d05f5b2ffe4bae8dd7c4d90cafabcbc406c29046634a5b5f

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

    Filesize

    84KB

    MD5

    6f7b17ee437c1357ed83f42f1e2ea1f7

    SHA1

    28b2f601ac341d1edde0c5b455c17796ca10a850

    SHA256

    00a0d583a7038e905fa8edb3ec292cd659965fe068ce2e9dd3a0a8e1d0070d44

    SHA512

    f2cd92f63e542c262602421a27008ae752444db9aacdf811a612f5ce021ed9446e6c93bf9d5bc9fe976f1f7cb835a1dd0959a105c5bb1c11702f99ccb4e7a883

  • memory/756-102-0x0000000000B40000-0x0000000000C40000-memory.dmp

    Filesize

    1024KB

  • memory/884-65-0x0000000000A30000-0x0000000000A34000-memory.dmp

    Filesize

    16KB

  • memory/884-64-0x0000000000B40000-0x0000000000C40000-memory.dmp

    Filesize

    1024KB

  • memory/884-74-0x0000000000B40000-0x0000000000C40000-memory.dmp

    Filesize

    1024KB

  • memory/1740-22-0x00000000021F0000-0x0000000002289000-memory.dmp

    Filesize

    612KB

  • memory/1836-145-0x0000000000830000-0x0000000000930000-memory.dmp

    Filesize

    1024KB

  • memory/2028-83-0x0000000000960000-0x0000000000A60000-memory.dmp

    Filesize

    1024KB

  • memory/2456-25-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2456-26-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2456-40-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2456-38-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2456-48-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2456-24-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2456-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2456-56-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2456-41-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2456-33-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3836-4-0x00000000021E0000-0x00000000022FB000-memory.dmp

    Filesize

    1.1MB

  • memory/3836-2-0x0000000002140000-0x00000000021DD000-memory.dmp

    Filesize

    628KB

  • memory/3836-49-0x00000000021E0000-0x00000000022FB000-memory.dmp

    Filesize

    1.1MB

  • memory/4176-107-0x0000000000410000-0x00000000004D5000-memory.dmp

    Filesize

    788KB

  • memory/4476-128-0x000000000084E000-0x000000000085E000-memory.dmp

    Filesize

    64KB

  • memory/4628-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4628-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4628-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4628-1-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4628-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4948-61-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/4948-66-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/4948-68-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB