Analysis

  • max time kernel
    57s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    25-04-2022 02:10

General

  • Target

    buildp.exe

  • Size

    841KB

  • MD5

    efed57771cb41fdde63781d1e195912c

  • SHA1

    a71b0545951c99eb6ad4a50c22d02c958003d920

  • SHA256

    72cd1426f13a698c7d63a288f4920147812303e8f10a4e66e414cc7c2206381d

  • SHA512

    6fd84f80ba5f3c53f48a6a0135cedc7b489cca419742e043116468bcda0898398dd7ddff4ac7d0d8b283312d4c411790b8ff74276f14016021597498b306a080

Malware Config

Extracted

Family

djvu

C2

http://fuyt.org/lancer/get.php

Attributes
  • extension

    .gtys

  • offline_id

    qwVQoIsE2xLety0oNWloOilSDuIBXJGK86LM3ot1

  • payload_url

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

    http://fuyt.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-fnn5kv33Vv 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: 0439JIjdm

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 8 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

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

    suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

  • 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). Likely ransomware behaviour.

  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\buildp.exe
    "C:\Users\Admin\AppData\Local\Temp\buildp.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:960
    • C:\Users\Admin\AppData\Local\Temp\buildp.exe
      "C:\Users\Admin\AppData\Local\Temp\buildp.exe"
      2⤵
      • 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\ac8b3858-4011-459b-97fd-4b7f805603e0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1216
      • C:\Users\Admin\AppData\Local\Temp\buildp.exe
        "C:\Users\Admin\AppData\Local\Temp\buildp.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1920
        • C:\Users\Admin\AppData\Local\Temp\buildp.exe
          "C:\Users\Admin\AppData\Local\Temp\buildp.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          PID:1112

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    727B

    MD5

    d9c694c2d95c6812aa0be903de46da96

    SHA1

    df1a733a9c6c27997c798ae4c5715cabe1ffa5e4

    SHA256

    f6f85bc0d1770803a206fbfb83c4cb888b3a24b494feac38baa3ea764cda37c0

    SHA512

    97a2eddf197aa74d1d05241008ead092f836b561bc1ad1d731d91db23d6dcce7a65d3dc1609384a3ad3fd5c858bae6c3a4361588b5a965ebf233f14410864793

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

    Filesize

    471B

    MD5

    ad8e032271f02af2a955ce10661cc3a8

    SHA1

    967d1bd99bea34c3110cc75c0c0d8b8565eae9f9

    SHA256

    d5081bf75d530e9336a6da0f9142bc10f4d06368c365cf0e33f7c99b0f643ce8

    SHA512

    bc69dfb03284cf1b8d172ff55938f238b928a0c7846306d8232ab697f54c771a9acf8b0e04a85e149da87ea8cfd9395605d0d95afc30eae1793e91399aa7eef7

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

    Filesize

    402B

    MD5

    56e3521b3870ba5e751351d81595e214

    SHA1

    f093ff3595ebc3ce5106cbcc7ad8ecda8e45ff1e

    SHA256

    9b8af4686b2c53055a6d78157374c1ae639e3b4237a8aec19fdbcce6456abecb

    SHA512

    9955c5fa9da6d6e05b3b090c82f999e4f2c1fc7f26dd2beef9d0f154871ea3aecd1820dee32554ceccb21738602a3260218be35bec4e36d36b40a9f0f2a9781f

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

    Filesize

    344B

    MD5

    506554edca41b899a89be2bc9144e786

    SHA1

    51a7e5dc7a507decb5dc47605660c725b54f3ce1

    SHA256

    dfac27be4e08f5f767b1e9c9df0c35dd6d338f49836313c81753f493aab80873

    SHA512

    589458d7548f3acd8a2120f8b94510d578f04cfb648931c023fbb22996a8df904037e9c0b8f8fb7e2a0a0f2ea209c992db11cfa4537ef9626087595f86d7d0ab

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

    Filesize

    396B

    MD5

    637529ce20aa05b3c687a6eabbc0d698

    SHA1

    d954f9d9075329ab50b218f43670001893d19465

    SHA256

    28b1386bbe214f2a9a1dda23193480cbe8abfc931af520cecaac9d9bfba8ca92

    SHA512

    4a9688faed3ef4909b039c6db82111a4d42ff60c0f2c6ae7a2c2b268cc3616213d70b817a030ae7c9ff82d283a6f7b1b24db9fc3327f6ce3efae6785e185089b

  • C:\Users\Admin\AppData\Local\ac8b3858-4011-459b-97fd-4b7f805603e0\buildp.exe

    Filesize

    841KB

    MD5

    efed57771cb41fdde63781d1e195912c

    SHA1

    a71b0545951c99eb6ad4a50c22d02c958003d920

    SHA256

    72cd1426f13a698c7d63a288f4920147812303e8f10a4e66e414cc7c2206381d

    SHA512

    6fd84f80ba5f3c53f48a6a0135cedc7b489cca419742e043116468bcda0898398dd7ddff4ac7d0d8b283312d4c411790b8ff74276f14016021597498b306a080

  • memory/884-60-0x0000000075801000-0x0000000075803000-memory.dmp

    Filesize

    8KB

  • memory/884-61-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/884-62-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/884-55-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/960-54-0x0000000001CE0000-0x0000000001D71000-memory.dmp

    Filesize

    580KB

  • memory/960-59-0x0000000001D80000-0x0000000001E9B000-memory.dmp

    Filesize

    1.1MB

  • memory/960-58-0x0000000001CE0000-0x0000000001D71000-memory.dmp

    Filesize

    580KB

  • memory/1112-78-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1112-72-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1920-70-0x0000000000220000-0x00000000002B1000-memory.dmp

    Filesize

    580KB

  • memory/1920-66-0x0000000000220000-0x00000000002B1000-memory.dmp

    Filesize

    580KB