Analysis

  • max time kernel
    122s
  • max time network
    125s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    01-12-2021 13:51

General

  • Target

    1798148b97c2af35dfdde5f318789de71d0fc6c92a476696df13b9bd400e55fb.exe

  • Size

    834KB

  • MD5

    f3dfd49718074a9aabb97218adbfe369

  • SHA1

    e418de7856b065563dbbb6493154172c1e159ed5

  • SHA256

    1798148b97c2af35dfdde5f318789de71d0fc6c92a476696df13b9bd400e55fb

  • SHA512

    5db2e1a09c9563592ea60f611f4c2dd552e4a7da43f20b757ed50a7bd2c3f955138e7cc84fb0c3476e920cbee7724877959396430af7ba3250d513332a8a0b73

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\1798148b97c2af35dfdde5f318789de71d0fc6c92a476696df13b9bd400e55fb.exe
    "C:\Users\Admin\AppData\Local\Temp\1798148b97c2af35dfdde5f318789de71d0fc6c92a476696df13b9bd400e55fb.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2144
    • C:\Users\Admin\AppData\Local\Temp\1798148b97c2af35dfdde5f318789de71d0fc6c92a476696df13b9bd400e55fb.exe
      "C:\Users\Admin\AppData\Local\Temp\1798148b97c2af35dfdde5f318789de71d0fc6c92a476696df13b9bd400e55fb.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2680
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\2ba5e677-17a5-45ae-9241-0d2443b763aa" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3972
      • C:\Users\Admin\AppData\Local\Temp\1798148b97c2af35dfdde5f318789de71d0fc6c92a476696df13b9bd400e55fb.exe
        "C:\Users\Admin\AppData\Local\Temp\1798148b97c2af35dfdde5f318789de71d0fc6c92a476696df13b9bd400e55fb.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1136
        • C:\Users\Admin\AppData\Local\Temp\1798148b97c2af35dfdde5f318789de71d0fc6c92a476696df13b9bd400e55fb.exe
          "C:\Users\Admin\AppData\Local\Temp\1798148b97c2af35dfdde5f318789de71d0fc6c92a476696df13b9bd400e55fb.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3088

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

    bfd4f4e0ce958f5356573c8fbca40dc4

    SHA1

    b7d645556c1bd15f01edbe15667ebc97c14e726b

    SHA256

    a6daaec6acc3fb24e00901f53c5eb362c087d4754718dea772a117c6b0dbcd13

    SHA512

    0284e3f39ff880456ef5981c237ae7d8f37a58e8be7db09a8e383b69bbf6a3274993aacb43c768f598b230410529b385ede630629a655c3c4a35390c28529b20

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

    f898c29b903af8f98af3be68d6ba3687

    SHA1

    2ec10c7456386d51cacce66a01b8237a903b7db1

    SHA256

    4cb108c7d5f2758e6be53abeeb615b49a4e4d79acf2e3938e0a64ffd70c41d32

    SHA512

    f408f21cce440a6edf912b22bb9a617783f04be6b209507542f763a59715057a326e8f567d45db3904d4d3c4a5bdbcec08d393cd43b426fd1a0d1562fe8f8794

  • C:\Users\Admin\AppData\Local\2ba5e677-17a5-45ae-9241-0d2443b763aa\1798148b97c2af35dfdde5f318789de71d0fc6c92a476696df13b9bd400e55fb.exe
    MD5

    f3dfd49718074a9aabb97218adbfe369

    SHA1

    e418de7856b065563dbbb6493154172c1e159ed5

    SHA256

    1798148b97c2af35dfdde5f318789de71d0fc6c92a476696df13b9bd400e55fb

    SHA512

    5db2e1a09c9563592ea60f611f4c2dd552e4a7da43f20b757ed50a7bd2c3f955138e7cc84fb0c3476e920cbee7724877959396430af7ba3250d513332a8a0b73

  • memory/1136-122-0x0000000000000000-mapping.dmp
  • memory/1136-123-0x0000000000741000-0x00000000007D3000-memory.dmp
    Filesize

    584KB

  • memory/2144-116-0x0000000000870000-0x000000000098B000-memory.dmp
    Filesize

    1.1MB

  • memory/2144-115-0x000000000075F000-0x00000000007F1000-memory.dmp
    Filesize

    584KB

  • memory/2680-118-0x0000000000424141-mapping.dmp
  • memory/2680-119-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2680-117-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3088-125-0x0000000000424141-mapping.dmp
  • memory/3088-128-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3972-120-0x0000000000000000-mapping.dmp