Analysis

  • max time kernel
    125s
  • max time network
    128s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    02-12-2021 05:10

General

  • Target

    db6bc6d44f7c1438207ca60c6397ce38515fd3f7ca227a6d959dd19a341f0731.exe

  • Size

    781KB

  • MD5

    39f7cad3ef720ddde86eabf1cf9b74ba

  • SHA1

    9876160be48b9575e892e59debab6e0eefa04101

  • SHA256

    db6bc6d44f7c1438207ca60c6397ce38515fd3f7ca227a6d959dd19a341f0731

  • SHA512

    0a2b233a8984fc1fc1eb7601c08a36d1e0f0245c6279ee3ccdf703d2c9759f2e4a9134838b1d171eec491251304d8d83db6d7dc91ecdf28192367693a5578ad0

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\db6bc6d44f7c1438207ca60c6397ce38515fd3f7ca227a6d959dd19a341f0731.exe
    "C:\Users\Admin\AppData\Local\Temp\db6bc6d44f7c1438207ca60c6397ce38515fd3f7ca227a6d959dd19a341f0731.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2612
    • C:\Users\Admin\AppData\Local\Temp\db6bc6d44f7c1438207ca60c6397ce38515fd3f7ca227a6d959dd19a341f0731.exe
      "C:\Users\Admin\AppData\Local\Temp\db6bc6d44f7c1438207ca60c6397ce38515fd3f7ca227a6d959dd19a341f0731.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3508
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\09f80755-ea75-4a24-a798-9b6e4ba36fec" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3320
      • C:\Users\Admin\AppData\Local\Temp\db6bc6d44f7c1438207ca60c6397ce38515fd3f7ca227a6d959dd19a341f0731.exe
        "C:\Users\Admin\AppData\Local\Temp\db6bc6d44f7c1438207ca60c6397ce38515fd3f7ca227a6d959dd19a341f0731.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3720
        • C:\Users\Admin\AppData\Local\Temp\db6bc6d44f7c1438207ca60c6397ce38515fd3f7ca227a6d959dd19a341f0731.exe
          "C:\Users\Admin\AppData\Local\Temp\db6bc6d44f7c1438207ca60c6397ce38515fd3f7ca227a6d959dd19a341f0731.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:1044

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

    82837ae52aee4aca47a2d0e910671760

    SHA1

    3e6a56a93c7bcf5515693903d1503810de851679

    SHA256

    a34299c64d09b2026d151122c126fed83255868164573d30b2f9d4e62c682e2e

    SHA512

    f83d51c4528895d7f8f9c38ef80a73a4f77384db1eeaf925860e1908c63e4dbd078b25df1c7c1ee56eef549207e3622c46c35fff86533ceee564e6a5de2409f4

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

    13f775780ba9fc0af8ecd0bca499fb8d

    SHA1

    b03eaaa161e685388e33299f20f9a762a9cb3344

    SHA256

    13f92f09eb74ede15a0a25b3d705ee37d98dd66074c04358aeaaf12b53655c0a

    SHA512

    10fabff990baaab82ccd1884675c58c513e75d969a90647da6bb9fe2acaea260c89ea593052d8487833b206abb562550caa0429cba33916068a921a4427753ce

  • C:\Users\Admin\AppData\Local\09f80755-ea75-4a24-a798-9b6e4ba36fec\db6bc6d44f7c1438207ca60c6397ce38515fd3f7ca227a6d959dd19a341f0731.exe
    MD5

    39f7cad3ef720ddde86eabf1cf9b74ba

    SHA1

    9876160be48b9575e892e59debab6e0eefa04101

    SHA256

    db6bc6d44f7c1438207ca60c6397ce38515fd3f7ca227a6d959dd19a341f0731

    SHA512

    0a2b233a8984fc1fc1eb7601c08a36d1e0f0245c6279ee3ccdf703d2c9759f2e4a9134838b1d171eec491251304d8d83db6d7dc91ecdf28192367693a5578ad0

  • memory/1044-127-0x0000000000424141-mapping.dmp
  • memory/1044-132-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2612-120-0x0000000004AA0000-0x0000000004B32000-memory.dmp
    Filesize

    584KB

  • memory/2612-121-0x0000000004B40000-0x0000000004C5B000-memory.dmp
    Filesize

    1.1MB

  • memory/3320-123-0x0000000000000000-mapping.dmp
  • memory/3508-119-0x0000000000424141-mapping.dmp
  • memory/3508-122-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3508-118-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3720-125-0x0000000000000000-mapping.dmp