Analysis

  • max time kernel
    128s
  • max time network
    129s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    28-11-2021 09:17

General

  • Target

    2b1cfed6d22fa4189d586bc0be959af00aa70be2600c5bb791d6d297a7b10839.exe

  • Size

    830KB

  • MD5

    3d7584ad6e6acf5057ef7481a51cf8eb

  • SHA1

    e324eeb54a2a864335a61c5a14294e8ef6be1518

  • SHA256

    2b1cfed6d22fa4189d586bc0be959af00aa70be2600c5bb791d6d297a7b10839

  • SHA512

    18a51dcb87731412bf38a1c227cf9bbdb12fceb87d8f44307dfea91b3d8c8170f10afb95fea00c1b45a2146c563d09f8a38d9edb759fc504aeb3de3a4636252d

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 7 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\2b1cfed6d22fa4189d586bc0be959af00aa70be2600c5bb791d6d297a7b10839.exe
    "C:\Users\Admin\AppData\Local\Temp\2b1cfed6d22fa4189d586bc0be959af00aa70be2600c5bb791d6d297a7b10839.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2500
    • C:\Users\Admin\AppData\Local\Temp\2b1cfed6d22fa4189d586bc0be959af00aa70be2600c5bb791d6d297a7b10839.exe
      "C:\Users\Admin\AppData\Local\Temp\2b1cfed6d22fa4189d586bc0be959af00aa70be2600c5bb791d6d297a7b10839.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3524
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\d6aea8c4-94b8-44e2-ab18-9c8ecf0e5ede" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3312
      • C:\Users\Admin\AppData\Local\Temp\2b1cfed6d22fa4189d586bc0be959af00aa70be2600c5bb791d6d297a7b10839.exe
        "C:\Users\Admin\AppData\Local\Temp\2b1cfed6d22fa4189d586bc0be959af00aa70be2600c5bb791d6d297a7b10839.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1240
        • C:\Users\Admin\AppData\Local\Temp\2b1cfed6d22fa4189d586bc0be959af00aa70be2600c5bb791d6d297a7b10839.exe
          "C:\Users\Admin\AppData\Local\Temp\2b1cfed6d22fa4189d586bc0be959af00aa70be2600c5bb791d6d297a7b10839.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3032

Network

MITRE ATT&CK Enterprise v6

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

    e2eae6fca18e084ea35b7b81f042f92d

    SHA1

    0d3656dec624b1770211eec9fcfae6389a87b486

    SHA256

    d08deb604c8bfb0be62d926650f695e938e5cbcb20c1a8a2a0256d514878b256

    SHA512

    9d6c48870d9fbd92ae6a39395d05496d86d3aba83d7d58c532011c3c8331af21558e140b6882644f39edfa2c864aa95e48ab4a58e785b618e9bbb3f6853358c9

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

    MD5

    87825e1eb8717e92d445f8495a30fc4f

    SHA1

    492c119067568a4b57a887329887ddfa875f8827

    SHA256

    0ab66d3ca94439bc9e59024f310c7ea730ef02a334cb15d44f55e2b43579b953

    SHA512

    7630e1d8c87119e935b176d3ea92955107dfbf66e4404e10c192e73705b3a8c0e4f1c51480a31840bdd9261aed19a01cd913e6dd81a4da80c3086d74b93be2cc

  • C:\Users\Admin\AppData\Local\d6aea8c4-94b8-44e2-ab18-9c8ecf0e5ede\2b1cfed6d22fa4189d586bc0be959af00aa70be2600c5bb791d6d297a7b10839.exe

    MD5

    3d7584ad6e6acf5057ef7481a51cf8eb

    SHA1

    e324eeb54a2a864335a61c5a14294e8ef6be1518

    SHA256

    2b1cfed6d22fa4189d586bc0be959af00aa70be2600c5bb791d6d297a7b10839

    SHA512

    18a51dcb87731412bf38a1c227cf9bbdb12fceb87d8f44307dfea91b3d8c8170f10afb95fea00c1b45a2146c563d09f8a38d9edb759fc504aeb3de3a4636252d

  • memory/1240-125-0x0000000000000000-mapping.dmp

  • memory/1240-133-0x00000000033E0000-0x000000000352A000-memory.dmp

    Filesize

    1.3MB

  • memory/2500-119-0x0000000003610000-0x000000000372B000-memory.dmp

    Filesize

    1.1MB

  • memory/3032-128-0x0000000000424141-mapping.dmp

  • memory/3032-134-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3312-123-0x0000000000000000-mapping.dmp

  • memory/3524-122-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3524-121-0x0000000000424141-mapping.dmp

  • memory/3524-120-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB