Analysis

  • max time kernel
    123s
  • max time network
    125s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    01-12-2021 15:23

General

  • Target

    de76bfce7ab5e3879f9d82d85b0a9017c9f516bec94508aff13cde7df71a9750.exe

  • Size

    834KB

  • MD5

    9c360cd106eb802a0a6b81d86345d60b

  • SHA1

    41fbf05ac274bee233838f721cbb94f6ec90cac7

  • SHA256

    de76bfce7ab5e3879f9d82d85b0a9017c9f516bec94508aff13cde7df71a9750

  • SHA512

    739c748e352a50bfc6605ff8f570d0672972bd766cbbbed4c69bb75fcea95fa8e3e9e0d8659828c1ff8830084cf2d871fb043a123700eec2a57c4d0de96c01e2

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .yqal

  • offline_id

    K3PMMX2aWwpnYby88Dzg7tmaIW7Tv0HMWvSyr7t1

  • payload_url

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

    http://tzgl.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-rIyEiK9ekc 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: manager@mailtemp.ch Reserve e-mail address to contact us: helprestoremanager@airmail.cc Your personal ID: 0356gSd743d

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 6 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 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\de76bfce7ab5e3879f9d82d85b0a9017c9f516bec94508aff13cde7df71a9750.exe
    "C:\Users\Admin\AppData\Local\Temp\de76bfce7ab5e3879f9d82d85b0a9017c9f516bec94508aff13cde7df71a9750.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3628
    • C:\Users\Admin\AppData\Local\Temp\de76bfce7ab5e3879f9d82d85b0a9017c9f516bec94508aff13cde7df71a9750.exe
      "C:\Users\Admin\AppData\Local\Temp\de76bfce7ab5e3879f9d82d85b0a9017c9f516bec94508aff13cde7df71a9750.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3936
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\4ae68c26-bc39-48ed-8655-2b1067e60bc8" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4236
      • C:\Users\Admin\AppData\Local\Temp\de76bfce7ab5e3879f9d82d85b0a9017c9f516bec94508aff13cde7df71a9750.exe
        "C:\Users\Admin\AppData\Local\Temp\de76bfce7ab5e3879f9d82d85b0a9017c9f516bec94508aff13cde7df71a9750.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4408
        • C:\Users\Admin\AppData\Local\Temp\de76bfce7ab5e3879f9d82d85b0a9017c9f516bec94508aff13cde7df71a9750.exe
          "C:\Users\Admin\AppData\Local\Temp\de76bfce7ab5e3879f9d82d85b0a9017c9f516bec94508aff13cde7df71a9750.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3128

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
    MD5

    237cc7db072d97a949e15c2d8dbea891

    SHA1

    43ef7b53667e94ae04496fa6cf6efc7f9a8ba83f

    SHA256

    7f9669eedb0bdb3b6647128101ec024ac5fc2447bd4372fbc8b4389f5d255acb

    SHA512

    07c69dbcb95369ffcfdcbe402d582e7dcad1b5f2976f9156460197c891eefae41b43d2640df96d08c4ae2338a5c8d03aeaa662487d0635678d34622aede96b2b

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
    MD5

    5db4d4fdb4428e5d3c794ed0a7c25958

    SHA1

    374866bf683c5c6a3620d7dcfe29ef04221c4723

    SHA256

    19ee4604acc3747d7a43fe1703dcacf39ca80e58a5f20e8607172b8f7037e45e

    SHA512

    8ad3ce80577dfc0e4edfb40c548d6b5ba88ca22bca51d0c9fe757d9e155372fe4c212ae12e8f7ed13fd40369a0722399b41c5f0edf9eb03de57fbd9890b2989d

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
    MD5

    5f0ec21217e06c33056d29248d72c712

    SHA1

    f3332a158ad42afcb6709beb47b7031e9441dea6

    SHA256

    bac1c3db3b86608fb86f2dad822a78e216f064380cca6b401bac30a81ae13c59

    SHA512

    8905b1dfdc66e080138d2a9a4fe5ba1f7112b1148502f5712da6a5e0c37f0e6dcf92c38c53961d691e981f9c351dee26b42c1012924c23624e01b0c3276c7641

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
    MD5

    57503831b283f2c07851eb94d4b4c6c1

    SHA1

    649dd40499890cc9e9f3033896d82a03c400dcb7

    SHA256

    cbcc13c037cc149a6bb660ed81a1fbb889637673570ab3608d0ea3d55f94a196

    SHA512

    7bd5df8a344fdbdd2a9608529f429c0f6184741b25e62f477ffa5c03003e160ca245a0c59fb1dfb5197ea1043c8b5b8b1db481e5bc5fd99c35d4893c607e0264

  • C:\Users\Admin\AppData\Local\4ae68c26-bc39-48ed-8655-2b1067e60bc8\de76bfce7ab5e3879f9d82d85b0a9017c9f516bec94508aff13cde7df71a9750.exe
    MD5

    9c360cd106eb802a0a6b81d86345d60b

    SHA1

    41fbf05ac274bee233838f721cbb94f6ec90cac7

    SHA256

    de76bfce7ab5e3879f9d82d85b0a9017c9f516bec94508aff13cde7df71a9750

    SHA512

    739c748e352a50bfc6605ff8f570d0672972bd766cbbbed4c69bb75fcea95fa8e3e9e0d8659828c1ff8830084cf2d871fb043a123700eec2a57c4d0de96c01e2

  • memory/3128-128-0x0000000000424141-mapping.dmp
  • memory/3128-133-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3628-118-0x00000000006D2000-0x0000000000764000-memory.dmp
    Filesize

    584KB

  • memory/3628-121-0x0000000000890000-0x00000000009AB000-memory.dmp
    Filesize

    1.1MB

  • memory/3936-122-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3936-120-0x0000000000424141-mapping.dmp
  • memory/3936-119-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/4236-123-0x0000000000000000-mapping.dmp
  • memory/4408-125-0x0000000000000000-mapping.dmp
  • memory/4408-126-0x00000000006C1000-0x0000000000753000-memory.dmp
    Filesize

    584KB