Analysis

  • max time kernel
    122s
  • max time network
    127s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    02-12-2021 22:07

General

  • Target

    49bd77639e9eeccdec3fcef07d7aedb5a868af2743679bdf7d49e6749912b323.exe

  • Size

    803KB

  • MD5

    0910fc8d4e5c7dba9a5d0d5aab4ec67b

  • SHA1

    800b385ef0bd6e397610f0b411bf40265010f2f0

  • SHA256

    49bd77639e9eeccdec3fcef07d7aedb5a868af2743679bdf7d49e6749912b323

  • SHA512

    4919bb68e977bc44697a5a27a46007a7f51dd7d09c052faba4df4c4cd22f28f30b1160ca65d92e7a51637f745242decc0fe22cd5d905d93c34191fca57c3c4dc

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\49bd77639e9eeccdec3fcef07d7aedb5a868af2743679bdf7d49e6749912b323.exe
    "C:\Users\Admin\AppData\Local\Temp\49bd77639e9eeccdec3fcef07d7aedb5a868af2743679bdf7d49e6749912b323.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4384
    • C:\Users\Admin\AppData\Local\Temp\49bd77639e9eeccdec3fcef07d7aedb5a868af2743679bdf7d49e6749912b323.exe
      "C:\Users\Admin\AppData\Local\Temp\49bd77639e9eeccdec3fcef07d7aedb5a868af2743679bdf7d49e6749912b323.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4360
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\a122920c-8dcb-4a63-b1fc-82ee110cdbfb" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4644
      • C:\Users\Admin\AppData\Local\Temp\49bd77639e9eeccdec3fcef07d7aedb5a868af2743679bdf7d49e6749912b323.exe
        "C:\Users\Admin\AppData\Local\Temp\49bd77639e9eeccdec3fcef07d7aedb5a868af2743679bdf7d49e6749912b323.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:812
        • C:\Users\Admin\AppData\Local\Temp\49bd77639e9eeccdec3fcef07d7aedb5a868af2743679bdf7d49e6749912b323.exe
          "C:\Users\Admin\AppData\Local\Temp\49bd77639e9eeccdec3fcef07d7aedb5a868af2743679bdf7d49e6749912b323.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3220

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

    6a4823dd14ee6616a4ef99d2bea9a44c

    SHA1

    1b0952c188fce7f3a0014cb473a80a66f3c71337

    SHA256

    cef0b13034255ff54ac6ee3a35c93cd92fe3d80e5793c2b5e63c0a42fcc3ff98

    SHA512

    a41d2a3f5c827518c102487af315e1303a50578eb258f65c17591eba0bc027ee2aa0a4941c494b9b5eb89842382f60ab3fec66e15a3f77cbf03cbae6dd9974c6

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

    efd1d8e8293f5bd8d688fef877221ccb

    SHA1

    55fd26b5c3ad5242aa08d1910c2e085d30489549

    SHA256

    43be67b3e85dd203dfabd04252b7b5a261b21ec846e11d760a4f07e70bf528c1

    SHA512

    755e7c67c4a0bc84debd21727d38dca438e7ea3ac8dc98b5f4140ae3f5de32c34aacd63c7cbfb110e1a2d3859089317a4401e07b7db5c36d2d167d9b764ec2cb

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
    MD5

    6c179a10930ee512856076f2a8392f91

    SHA1

    fe177531509b20346a63ca8ee3d13c1a2c1ad17c

    SHA256

    bbf2f26329421f198d04b4549bfd75d3a6b9dac7e921dcaf4ef95564dccfdd0c

    SHA512

    34654b5857c2732f41ead6e75fa84da7ccc40b8911e982abc37d3f2be20a70f1050979ee66deed2b05575844d611dae006bcda7037db83d08cfb6f545a81671d

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

    e2ae5688817120e79d7214e1042a96e0

    SHA1

    0a8a24006ff041f13a7c7dc642077bd461532437

    SHA256

    8162b88103f4642c7b97b1152e9cdd2c8b740f9491791b952cb934ff637ae439

    SHA512

    246947f06e7b888c67dd4f01227400c7dacf86914547d3e9546eaafa12e3bcd6e5b750de04c45c539375be8a55b76e379b9c2dbf517155a440a106b8b9c27579

  • C:\Users\Admin\AppData\Local\a122920c-8dcb-4a63-b1fc-82ee110cdbfb\49bd77639e9eeccdec3fcef07d7aedb5a868af2743679bdf7d49e6749912b323.exe
    MD5

    0910fc8d4e5c7dba9a5d0d5aab4ec67b

    SHA1

    800b385ef0bd6e397610f0b411bf40265010f2f0

    SHA256

    49bd77639e9eeccdec3fcef07d7aedb5a868af2743679bdf7d49e6749912b323

    SHA512

    4919bb68e977bc44697a5a27a46007a7f51dd7d09c052faba4df4c4cd22f28f30b1160ca65d92e7a51637f745242decc0fe22cd5d905d93c34191fca57c3c4dc

  • memory/812-125-0x0000000000000000-mapping.dmp
  • memory/3220-127-0x0000000000424141-mapping.dmp
  • memory/3220-132-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/4360-118-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/4360-122-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/4360-119-0x0000000000424141-mapping.dmp
  • memory/4384-121-0x0000000004BF0000-0x0000000004D0B000-memory.dmp
    Filesize

    1.1MB

  • memory/4384-120-0x0000000004A40000-0x0000000004AD1000-memory.dmp
    Filesize

    580KB

  • memory/4644-123-0x0000000000000000-mapping.dmp