Analysis

  • max time kernel
    123s
  • max time network
    154s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    01-12-2021 18:28

General

  • Target

    b88292ce818f388a8c9192afec390d37ab7b11a6179acedfdfa2c4e92c4cf13e.exe

  • Size

    838KB

  • MD5

    4ef71278ec8a46a7e6e79c6ff6e2e6ba

  • SHA1

    0c0cfc44a7fd7400e1a7b0c6208cf3bf6f25c72a

  • SHA256

    b88292ce818f388a8c9192afec390d37ab7b11a6179acedfdfa2c4e92c4cf13e

  • SHA512

    9d3ade6545e00fca8932759e797f68480916995a861af039aa7eba30d3fe0b0a5c5301c2161bcd9c4621ef24fa46c1f40a130b30ba3453056d95c6612a8e2a79

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\b88292ce818f388a8c9192afec390d37ab7b11a6179acedfdfa2c4e92c4cf13e.exe
    "C:\Users\Admin\AppData\Local\Temp\b88292ce818f388a8c9192afec390d37ab7b11a6179acedfdfa2c4e92c4cf13e.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3652
    • C:\Users\Admin\AppData\Local\Temp\b88292ce818f388a8c9192afec390d37ab7b11a6179acedfdfa2c4e92c4cf13e.exe
      "C:\Users\Admin\AppData\Local\Temp\b88292ce818f388a8c9192afec390d37ab7b11a6179acedfdfa2c4e92c4cf13e.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2908
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\56bd60b3-495c-4e10-b7d3-566603264e00" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2452
      • C:\Users\Admin\AppData\Local\Temp\b88292ce818f388a8c9192afec390d37ab7b11a6179acedfdfa2c4e92c4cf13e.exe
        "C:\Users\Admin\AppData\Local\Temp\b88292ce818f388a8c9192afec390d37ab7b11a6179acedfdfa2c4e92c4cf13e.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:876
        • C:\Users\Admin\AppData\Local\Temp\b88292ce818f388a8c9192afec390d37ab7b11a6179acedfdfa2c4e92c4cf13e.exe
          "C:\Users\Admin\AppData\Local\Temp\b88292ce818f388a8c9192afec390d37ab7b11a6179acedfdfa2c4e92c4cf13e.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2772

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

    566a6cc0e55ba81d92ae8367b97c1252

    SHA1

    3c938328c4672dbe31857d2827f4422d9b2e5c48

    SHA256

    5897a9e6d4252a2d5ce35e38cadc3ddfc6c94dc1774d010415475ed011f8b1a8

    SHA512

    04c7adc4eec05acdb78b4a7073ddc4da7794b7cd15b3a24708d758d83e81d3b20771dc2c29fc1c42cdc7786a068d493ff23a2ebb862f4d78dd6d5554b8cda52b

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

    2fc6578a1d999606e73e889645605287

    SHA1

    5c2e499aada2d7e23016cb2ade933fdd581af297

    SHA256

    9acbb21ba8e5d505c93221248f0964b0e85a4d2ac47d25b47c3781bc4675a74d

    SHA512

    94c045d302d269b8a0052228b310d34f75800f52dfe86b7e45c76638c4bae97ed6d4f00c5e07a58a15d566067d61b301c3b62da723159ee8936a94b96074bc3a

  • C:\Users\Admin\AppData\Local\56bd60b3-495c-4e10-b7d3-566603264e00\b88292ce818f388a8c9192afec390d37ab7b11a6179acedfdfa2c4e92c4cf13e.exe
    MD5

    4ef71278ec8a46a7e6e79c6ff6e2e6ba

    SHA1

    0c0cfc44a7fd7400e1a7b0c6208cf3bf6f25c72a

    SHA256

    b88292ce818f388a8c9192afec390d37ab7b11a6179acedfdfa2c4e92c4cf13e

    SHA512

    9d3ade6545e00fca8932759e797f68480916995a861af039aa7eba30d3fe0b0a5c5301c2161bcd9c4621ef24fa46c1f40a130b30ba3453056d95c6612a8e2a79

  • memory/876-125-0x0000000000000000-mapping.dmp
  • memory/2452-123-0x0000000000000000-mapping.dmp
  • memory/2772-128-0x0000000000424141-mapping.dmp
  • memory/2772-133-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2908-122-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2908-121-0x0000000000424141-mapping.dmp
  • memory/2908-120-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3652-118-0x00000000007E2000-0x0000000000873000-memory.dmp
    Filesize

    580KB

  • memory/3652-119-0x0000000000880000-0x000000000099B000-memory.dmp
    Filesize

    1.1MB