Analysis

  • max time kernel
    106s
  • max time network
    121s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    02-12-2021 00:04

General

  • Target

    adfe8d8de90d1db3e12a1cdd7788c973e4982bc2797731e670724c42bd947267.exe

  • Size

    780KB

  • MD5

    0fb09e7865f0a13765b7a9aab7c1004e

  • SHA1

    7b0d6fa7bff9e1bf070e67d16a50daf0b3e68577

  • SHA256

    adfe8d8de90d1db3e12a1cdd7788c973e4982bc2797731e670724c42bd947267

  • SHA512

    d66eaeda587365c8cecb13338fd800d1868c531b4e4f682a2ea619aa1003a9dc578409b9fc10a0aba4b8948c9e442f5b94f95f6bdfd68ff235b522b24c16fefc

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .moia

  • 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: 0355gSd743d

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\adfe8d8de90d1db3e12a1cdd7788c973e4982bc2797731e670724c42bd947267.exe
    "C:\Users\Admin\AppData\Local\Temp\adfe8d8de90d1db3e12a1cdd7788c973e4982bc2797731e670724c42bd947267.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2392
    • C:\Users\Admin\AppData\Local\Temp\adfe8d8de90d1db3e12a1cdd7788c973e4982bc2797731e670724c42bd947267.exe
      "C:\Users\Admin\AppData\Local\Temp\adfe8d8de90d1db3e12a1cdd7788c973e4982bc2797731e670724c42bd947267.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2720
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\0f2a83eb-1caa-404f-977b-5316805d0dd9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3736
      • C:\Users\Admin\AppData\Local\Temp\adfe8d8de90d1db3e12a1cdd7788c973e4982bc2797731e670724c42bd947267.exe
        "C:\Users\Admin\AppData\Local\Temp\adfe8d8de90d1db3e12a1cdd7788c973e4982bc2797731e670724c42bd947267.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3900
        • C:\Users\Admin\AppData\Local\Temp\adfe8d8de90d1db3e12a1cdd7788c973e4982bc2797731e670724c42bd947267.exe
          "C:\Users\Admin\AppData\Local\Temp\adfe8d8de90d1db3e12a1cdd7788c973e4982bc2797731e670724c42bd947267.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3108

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

    ce36b83fc2b06f96872d79d86b9bc0ee

    SHA1

    4b0445d5464a2b0eaac930d4aea8a26996767ef2

    SHA256

    2629266dfd0148e97904df7e4bf4d6cd5547e3ac0e490baefdbc82bf0be5a4cf

    SHA512

    19d34f538b5ecdf230fb08407452a9a0ca2696c44e4448a8bf3d60546df9eedc862b0f68bb387e5c13ef4712ed01efcf843ba61cd902af10217773f002ca5b4c

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

    41857a81d362f04f18d7d3188419e0d8

    SHA1

    8e0b37afa684148f8abc0b40c0c0f9db4242c6ea

    SHA256

    eea2b5f198b4527088bb5fd032fe6493c25ab0132a842edbdc801d9db04a6630

    SHA512

    f28f039984822e07620daca050bf58f3be24ade6037762f622869d191c2ca100f09add7b707a79a3728496b751132802a3c1033e1b394f1204e96edde94cfd97

  • C:\Users\Admin\AppData\Local\0f2a83eb-1caa-404f-977b-5316805d0dd9\adfe8d8de90d1db3e12a1cdd7788c973e4982bc2797731e670724c42bd947267.exe
    MD5

    0fb09e7865f0a13765b7a9aab7c1004e

    SHA1

    7b0d6fa7bff9e1bf070e67d16a50daf0b3e68577

    SHA256

    adfe8d8de90d1db3e12a1cdd7788c973e4982bc2797731e670724c42bd947267

    SHA512

    d66eaeda587365c8cecb13338fd800d1868c531b4e4f682a2ea619aa1003a9dc578409b9fc10a0aba4b8948c9e442f5b94f95f6bdfd68ff235b522b24c16fefc

  • memory/2392-121-0x0000000004BB0000-0x0000000004CCB000-memory.dmp
    Filesize

    1.1MB

  • memory/2392-120-0x0000000004B10000-0x0000000004BA1000-memory.dmp
    Filesize

    580KB

  • memory/2720-124-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2720-118-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2720-119-0x0000000000424141-mapping.dmp
  • memory/3108-127-0x0000000000424141-mapping.dmp
  • memory/3108-132-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3736-122-0x0000000000000000-mapping.dmp
  • memory/3900-125-0x0000000000000000-mapping.dmp