Analysis

  • max time kernel
    145s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/01/2024, 18:40

General

  • Target

    753a72923bbbcde52682c31fcc134124.exe

  • Size

    786KB

  • MD5

    753a72923bbbcde52682c31fcc134124

  • SHA1

    7a7a4ef36dc84994c250b32d03d8398c5116e091

  • SHA256

    25a605a5eb395c355f464bdec7a391985069ce226ce75675e0df281ccb98c7d5

  • SHA512

    303ae0cc51e7d41321c0f44ebcd0f5d8284cd16e79f3529102628cb99e637cea6a0aa4d2bf17bc8491ef2d62ceb8cd87ae3b2b87a8e6e6fc3bd64e564160075d

  • SSDEEP

    24576:HFlyvPt1Jo8yszpsy9k6I5q55DUsdBPA:l4vPt1K8yksyeqBI

Malware Config

Extracted

Family

djvu

C2

http://astdg.top/nddddhsspen6/get.php

Attributes
  • extension

    .moqs

  • offline_id

    CatwRkqdYh2Jomn6DqwFoGgcSbDsle1xlE1NPtt1

  • payload_url

    http://securebiz.org/dl/build2.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-N3p42CffoV 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: 0318ewgfDd

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 17 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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).

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe
    "C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1692
    • C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe
      "C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1456
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\3eeb72eb-4ef6-401d-be37-2fa23c11e5f3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2140
      • C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe
        "C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4396
        • C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe
          "C:\Users\Admin\AppData\Local\Temp\753a72923bbbcde52682c31fcc134124.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3084

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

          Filesize

          1KB

          MD5

          d00cc6d25614c515b6e2d64d90033d15

          SHA1

          449ca823652db2a579cbd6b06284ff061147f6ba

          SHA256

          ab0d18e7b28375f2cc703c9b7c899fb9ea9429783709f358a47e42fe850ed53d

          SHA512

          80e6454003cd85122a068c3353defe50ddb97ece70204ebd7c7172093df1ac506e4f023e4b991b4673407ed619d4932439675ba6893d0436ecc927d54f3c9f96

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

          Filesize

          724B

          MD5

          8202a1cd02e7d69597995cabbe881a12

          SHA1

          8858d9d934b7aa9330ee73de6c476acf19929ff6

          SHA256

          58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

          SHA512

          97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

          Filesize

          410B

          MD5

          b4858a4e5a63d4cc158301a046ae6ac4

          SHA1

          67f0702174f735ba1f1824b2fdb1ef90ed206214

          SHA256

          b8c5a9874077bebfc06782732fe60e97361927f8af5dfe382ec5cadb317e56dc

          SHA512

          4aea7e631e6a9e472c16aa51d5a820643c8405c9da63b99a9f0bc0f7399783a3ab24bab6f2320c0c11cbd849bf02ba9ecb5f6c78f596fd37459e6947c7f1dadf

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

          Filesize

          392B

          MD5

          b1c5fc3fe0be24b5046d8d4af405c374

          SHA1

          91a1429dd737fb54ce556a9f52cb6a8734c3927a

          SHA256

          c9976375152f4323a40e336778955481389a5c309f3e88e04318adbc34630b23

          SHA512

          18835220d917f8773db7ea3063beb09d073d53bcc45319120acc57f79aeb3dd30089b4e929ed4c7c1d8138dd2f61597c6d161e9de8952a22480372cb81d92017

        • C:\Users\Admin\AppData\Local\3eeb72eb-4ef6-401d-be37-2fa23c11e5f3\753a72923bbbcde52682c31fcc134124.exe

          Filesize

          786KB

          MD5

          753a72923bbbcde52682c31fcc134124

          SHA1

          7a7a4ef36dc84994c250b32d03d8398c5116e091

          SHA256

          25a605a5eb395c355f464bdec7a391985069ce226ce75675e0df281ccb98c7d5

          SHA512

          303ae0cc51e7d41321c0f44ebcd0f5d8284cd16e79f3529102628cb99e637cea6a0aa4d2bf17bc8491ef2d62ceb8cd87ae3b2b87a8e6e6fc3bd64e564160075d

        • memory/1456-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1456-16-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1456-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1456-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1456-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1692-1-0x00000000026A0000-0x000000000273A000-memory.dmp

          Filesize

          616KB

        • memory/1692-2-0x0000000002870000-0x000000000298B000-memory.dmp

          Filesize

          1.1MB

        • memory/3084-20-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3084-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3084-21-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3084-27-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3084-28-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3084-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3084-32-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3084-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3084-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3084-36-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3084-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4396-18-0x0000000000AE0000-0x0000000000B79000-memory.dmp

          Filesize

          612KB