Analysis

  • max time kernel
    128s
  • max time network
    131s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    28-11-2021 16:37

General

  • Target

    fc66cb78db7acf802aea15fbb477ff4881364c9fe0d68765e35bbdec8aa411ba.exe

  • Size

    846KB

  • MD5

    426266e30ac3bebd196f7d41ece67b8a

  • SHA1

    1218e6dcce682981ed4f89c2d84f60fce947c178

  • SHA256

    fc66cb78db7acf802aea15fbb477ff4881364c9fe0d68765e35bbdec8aa411ba

  • SHA512

    f0d0c41725e1cd68773290458071902f15b76b0ac2dd8cee704d87dbce395fc804cada7874d344165cb36ef6b8141f9894480cbd8009f9c95232d8babfc6ca60

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\fc66cb78db7acf802aea15fbb477ff4881364c9fe0d68765e35bbdec8aa411ba.exe
    "C:\Users\Admin\AppData\Local\Temp\fc66cb78db7acf802aea15fbb477ff4881364c9fe0d68765e35bbdec8aa411ba.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2468
    • C:\Users\Admin\AppData\Local\Temp\fc66cb78db7acf802aea15fbb477ff4881364c9fe0d68765e35bbdec8aa411ba.exe
      "C:\Users\Admin\AppData\Local\Temp\fc66cb78db7acf802aea15fbb477ff4881364c9fe0d68765e35bbdec8aa411ba.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3856
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\663acfea-f1cd-47ec-8da3-8a84c35b9bc9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3356
      • C:\Users\Admin\AppData\Local\Temp\fc66cb78db7acf802aea15fbb477ff4881364c9fe0d68765e35bbdec8aa411ba.exe
        "C:\Users\Admin\AppData\Local\Temp\fc66cb78db7acf802aea15fbb477ff4881364c9fe0d68765e35bbdec8aa411ba.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:656
        • C:\Users\Admin\AppData\Local\Temp\fc66cb78db7acf802aea15fbb477ff4881364c9fe0d68765e35bbdec8aa411ba.exe
          "C:\Users\Admin\AppData\Local\Temp\fc66cb78db7acf802aea15fbb477ff4881364c9fe0d68765e35bbdec8aa411ba.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:1016

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

    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

    12e98bbc093337aebb36fc2fe4e9f4df

    SHA1

    24cc007646f5668d214d4f80f67f074d4a13e2c3

    SHA256

    741b8418491e0938df2947e2c6c41582dda874bd226375dc594820a1302666df

    SHA512

    ba2602b2ec94109ae50d89b852170e03b332f7fbbd4ed9d26cab5c8c3b6e5dbad49e1d3cd29234fd08f92333913e0f18f457b074a0fa1a1fd7959438c2f78b29

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

    6f969910c7d7146d6b450846a226288c

    SHA1

    aa339de7ce9c07e45dcb3c3eec4a631af0924633

    SHA256

    0118f65bd6d49a79b750e9f59454279e239b5d9c1f84f6d9ffbcb36a681d67e8

    SHA512

    a203f79829e6bc05d6068fa228df914c694e34443ff025623a2a91960cedaa06d04058bdff941f42bd3277d1fc26167d71516f9c616c4c2ee43d0535b3ce8b5d

  • C:\Users\Admin\AppData\Local\663acfea-f1cd-47ec-8da3-8a84c35b9bc9\fc66cb78db7acf802aea15fbb477ff4881364c9fe0d68765e35bbdec8aa411ba.exe
    MD5

    426266e30ac3bebd196f7d41ece67b8a

    SHA1

    1218e6dcce682981ed4f89c2d84f60fce947c178

    SHA256

    fc66cb78db7acf802aea15fbb477ff4881364c9fe0d68765e35bbdec8aa411ba

    SHA512

    f0d0c41725e1cd68773290458071902f15b76b0ac2dd8cee704d87dbce395fc804cada7874d344165cb36ef6b8141f9894480cbd8009f9c95232d8babfc6ca60

  • memory/656-125-0x0000000000000000-mapping.dmp
  • memory/656-126-0x0000000003758000-0x00000000037EA000-memory.dmp
    Filesize

    584KB

  • memory/1016-128-0x0000000000424141-mapping.dmp
  • memory/1016-133-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2468-121-0x00000000038D0000-0x00000000039EB000-memory.dmp
    Filesize

    1.1MB

  • memory/2468-118-0x000000000376C000-0x00000000037FE000-memory.dmp
    Filesize

    584KB

  • memory/3356-122-0x0000000000000000-mapping.dmp
  • memory/3856-124-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3856-120-0x0000000000424141-mapping.dmp
  • memory/3856-119-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB