Analysis

  • max time kernel
    110s
  • max time network
    132s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    27-11-2021 17:26

General

  • Target

    53ea54f60b62dbcaa245d684b35f0dfa867e14e01bc5f1975f1ce887b3ea7a57.exe

  • Size

    832KB

  • MD5

    b5b108da040a984c803bceb7e64798cd

  • SHA1

    72b247c40e439cb034b6e3344bbdf434fce323cc

  • SHA256

    53ea54f60b62dbcaa245d684b35f0dfa867e14e01bc5f1975f1ce887b3ea7a57

  • SHA512

    d5a9c8e7ac9af459ff674e2de0f98aa3a5d448c22f38865f1a868c41d3c3c6a9c101a832c2b056b60b694ca3355f03d76d0acf9799006cb45e419df9a696e61f

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .robm

  • offline_id

    Z5GGASEfY71jtxU3i3E8kzvrTJmY9oiZkjcSm0t1

  • 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-Tjb0YqckGX 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: 0354gSd743d

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\53ea54f60b62dbcaa245d684b35f0dfa867e14e01bc5f1975f1ce887b3ea7a57.exe
    "C:\Users\Admin\AppData\Local\Temp\53ea54f60b62dbcaa245d684b35f0dfa867e14e01bc5f1975f1ce887b3ea7a57.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2608
    • C:\Users\Admin\AppData\Local\Temp\53ea54f60b62dbcaa245d684b35f0dfa867e14e01bc5f1975f1ce887b3ea7a57.exe
      "C:\Users\Admin\AppData\Local\Temp\53ea54f60b62dbcaa245d684b35f0dfa867e14e01bc5f1975f1ce887b3ea7a57.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2052
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\3365487a-c7cb-4957-9a69-e4525ce321c1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:644
      • C:\Users\Admin\AppData\Local\Temp\53ea54f60b62dbcaa245d684b35f0dfa867e14e01bc5f1975f1ce887b3ea7a57.exe
        "C:\Users\Admin\AppData\Local\Temp\53ea54f60b62dbcaa245d684b35f0dfa867e14e01bc5f1975f1ce887b3ea7a57.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:636
        • C:\Users\Admin\AppData\Local\Temp\53ea54f60b62dbcaa245d684b35f0dfa867e14e01bc5f1975f1ce887b3ea7a57.exe
          "C:\Users\Admin\AppData\Local\Temp\53ea54f60b62dbcaa245d684b35f0dfa867e14e01bc5f1975f1ce887b3ea7a57.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3876

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    MD5

    9dc67b11ad67886d83ec9cbf7922f317

    SHA1

    421eb58463bb0c726479bcc32f548de29991ebeb

    SHA256

    d2f4acc07d8bf2b562029cc85eec1b52bd37be9f276a927f565610e109308ead

    SHA512

    ea5995232251a3e161769484f6a49624f656ea94cc2545477daec56c3536736cee0f8554af535ca7a82e5fc687e5ee56c5955b32726b8c2c21d28c538d25b367

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

    MD5

    b3439cbad3deec29218c20b7294ccd3c

    SHA1

    01f1ecbc00e38042701d9969fd44466465ed3147

    SHA256

    80975f1efe7637a0b5cfd772b5eb35f7ad19e698ce674aacad7eb779c0f62249

    SHA512

    33fe0b38252890ef561a95f5ca661b8f3cc71df632c8939914869980672847dcd19527a0d9e1d79f274dc328b5aad5b5bf6229c4ab9ede0cb69d87d57af9d9c4

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

    MD5

    07e4065ef7a1486e174957623423acd9

    SHA1

    43828dd0db73c8b90b6f2c3b293ad64e1df9c2b0

    SHA256

    31df376fa38c80152a05f513f8b463c1d87d62320cfed1d982d99af08f056294

    SHA512

    05d06ae1286e3e81ded7921f2278a98186c1e3854141c7b85d2befb5603b76a7ad9fa4f5b101be41f3df61ea44fd0477bc1dbd6f716237c2e2b6c6afdc51da6e

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

    MD5

    df9df27eb21e6282164175b8815f9f47

    SHA1

    656a4dfe9f73b47e28f7e8cadd439ab7163e1ae1

    SHA256

    aa01eec1438fbfc73ad6dce8e58f233540d817be5ff946c9082697c215557d93

    SHA512

    636011c5265b7c14ef453ea7e64d1da0543bfe3022449a9e561bc8e8651d8d3d0c24348bec378376a5d5b8e56b340a367cdcf94ded499faa8bdf72116d307418

  • C:\Users\Admin\AppData\Local\3365487a-c7cb-4957-9a69-e4525ce321c1\53ea54f60b62dbcaa245d684b35f0dfa867e14e01bc5f1975f1ce887b3ea7a57.exe

    MD5

    b5b108da040a984c803bceb7e64798cd

    SHA1

    72b247c40e439cb034b6e3344bbdf434fce323cc

    SHA256

    53ea54f60b62dbcaa245d684b35f0dfa867e14e01bc5f1975f1ce887b3ea7a57

    SHA512

    d5a9c8e7ac9af459ff674e2de0f98aa3a5d448c22f38865f1a868c41d3c3c6a9c101a832c2b056b60b694ca3355f03d76d0acf9799006cb45e419df9a696e61f

  • memory/636-125-0x0000000000000000-mapping.dmp

  • memory/636-126-0x0000000004F1A000-0x0000000004FAB000-memory.dmp

    Filesize

    580KB

  • memory/644-123-0x0000000000000000-mapping.dmp

  • memory/2052-119-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2052-120-0x0000000000424141-mapping.dmp

  • memory/2052-122-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2608-121-0x0000000005080000-0x000000000519B000-memory.dmp

    Filesize

    1.1MB

  • memory/2608-118-0x0000000004FEC000-0x000000000507D000-memory.dmp

    Filesize

    580KB

  • memory/3876-128-0x0000000000424141-mapping.dmp

  • memory/3876-133-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB