Analysis

  • max time kernel
    143s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    13-08-2024 19:58

General

  • Target

    8f81e96f8c96dec003b51826bbd5885f.exe

  • Size

    758KB

  • MD5

    8f81e96f8c96dec003b51826bbd5885f

  • SHA1

    7b8c4ec9a3808eaa32ab07d1608ad275f34adbe3

  • SHA256

    f7561de520f21434830d40d74904e93125b76407d477411622bbd829283ba8c4

  • SHA512

    8770f01b013e401a3eef992aa53e7623a0367bf857309fa238781f70f44ef3e1e5697751d2a28b7ff1f35e8fad921b3fbfeb17f3c9724fab786934c8eb8ee8ce

  • SSDEEP

    12288:VI/X+roiofZzZXvGasEKcXm/WThCFrUi/bwV5LYBYH7caEArXMViC53j:gOsiorGLEKT/WThUlbaUYH7lE005

Malware Config

Extracted

Family

djvu

C2

http://securebiz.org/fhsgtsspen6/get.php

Attributes
  • extension

    .rigd

  • offline_id

    gigF2ELYocnMQz77LhEpSoXvtYp2junk9HZFtJt1

  • payload_url

    http://znpst.top/dl/build2.exe

    http://securebiz.org/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-2zbBkO06mv 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: 0335gSd743d

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 15 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.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f.exe
    "C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2432
    • C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f.exe
      "C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f.exe"
      2⤵
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2660
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\ba6b8eb4-cdd6-4fb6-924f-7f4ec85e9ffc" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:2724
      • C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f.exe
        "C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2664
        • C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f.exe
          "C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:2564

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    1KB

    MD5

    7fb5fa1534dcf77f2125b2403b30a0ee

    SHA1

    365d96812a69ac0a4611ea4b70a3f306576cc3ea

    SHA256

    33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f

    SHA512

    a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e

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

    Filesize

    436B

    MD5

    971c514f84bba0785f80aa1c23edfd79

    SHA1

    732acea710a87530c6b08ecdf32a110d254a54c8

    SHA256

    f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895

    SHA512

    43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58

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

    Filesize

    174B

    MD5

    67b1ad782b206be953ed4411beeb2782

    SHA1

    55ee376e1da92a6624dfbd51dd951a5309eff426

    SHA256

    ee4b8cba3218eae21aaee727733a64baabad38d29cc2f867751ba461fee787d3

    SHA512

    526f600cb3ef1398e9b507db25763c43c466579a91554bd08adbb54e5fa9837b94bf14b2895952b9c8ff798b9b9e90ef4655d41593664cbc8bd6e2e616bc9e12

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

    Filesize

    342B

    MD5

    b97a380ca83351242d55fea1d4b26c1b

    SHA1

    b43219920c0be8a8dfaf7cc9e9a09948af43927a

    SHA256

    5f941c6dcc37a09c4b2ec09d04103cf293393cda2e2c824621919cb40311de5c

    SHA512

    83e7b9759c5abce2b02bbe80d1ff62709c8e9cd9b8b8abc656a9efd7e73410b0051f6de419862a9857379eddd307ae76154bfcef7d5d746e9032c678973191f6

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

    Filesize

    170B

    MD5

    85fb965aaac3425e25279a37ce5b992c

    SHA1

    ac2b3a356e465421679d121b754fbdcef0a44e01

    SHA256

    559b1b619bb3344363bbf2ab38bf7242c522ab707fd088060cbd912556feaace

    SHA512

    6f8fff33bb5f47917b693f74333c5a77178fb3b07da396479e12733182ca0971e624043f0fa9d337b5a13c178c035f792f35af5785254b6e29f442470b9a13db

  • C:\Users\Admin\AppData\Local\Temp\Cab57B1.tmp

    Filesize

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

  • C:\Users\Admin\AppData\Local\ba6b8eb4-cdd6-4fb6-924f-7f4ec85e9ffc\8f81e96f8c96dec003b51826bbd5885f.exe

    Filesize

    758KB

    MD5

    8f81e96f8c96dec003b51826bbd5885f

    SHA1

    7b8c4ec9a3808eaa32ab07d1608ad275f34adbe3

    SHA256

    f7561de520f21434830d40d74904e93125b76407d477411622bbd829283ba8c4

    SHA512

    8770f01b013e401a3eef992aa53e7623a0367bf857309fa238781f70f44ef3e1e5697751d2a28b7ff1f35e8fad921b3fbfeb17f3c9724fab786934c8eb8ee8ce

  • memory/2432-1-0x0000000000360000-0x00000000003F1000-memory.dmp

    Filesize

    580KB

  • memory/2432-2-0x0000000000A90000-0x0000000000BAB000-memory.dmp

    Filesize

    1.1MB

  • memory/2432-0-0x0000000000360000-0x00000000003F1000-memory.dmp

    Filesize

    580KB

  • memory/2432-7-0x0000000000360000-0x00000000003F1000-memory.dmp

    Filesize

    580KB

  • memory/2564-55-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2564-60-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2564-64-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2564-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2564-63-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2564-62-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2564-39-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2564-58-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2564-56-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2564-54-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2660-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2660-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2660-8-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2660-9-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2660-31-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2664-32-0x0000000000350000-0x00000000003E1000-memory.dmp

    Filesize

    580KB

  • memory/2664-38-0x0000000000400000-0x00000000008ED000-memory.dmp

    Filesize

    4.9MB