Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    02-07-2024 08:20

General

  • Target

    Encrypter.vmp.exe

  • Size

    19.2MB

  • MD5

    4e5fbe0a7cc9e69bd7f994d694875d86

  • SHA1

    976fa55bf71c158572b4cea74f2413810bf2b568

  • SHA256

    2d343433e97ee2a6f1baed3e93a66cdb07ed1ce7266bfb008f8a6e281a6adb99

  • SHA512

    ff1a2fae26c49a7359afffa30cd41a700eb513f2c03c3ea994807c7b7e848f2e4a2ef585bbd6195adb553e85aabdf25446c736bdcc983ab4b3f223e87454a69d

  • SSDEEP

    393216:osx2sETPcULgSP7hpDsw6+jUIz4fwAnngYOPSfW:otsEgSlpDx64Uq1SgXgW

Malware Config

Extracted

Path

C:\Users\Admin\Desktop\read_it.txt

Ransom Note
----> You got ransom by FemboyCat <---- All of your files have been encrypted Your computer was infected with a ransomware virus. Your files have been encrypted and you won't be able to decrypt them without our help.What can I do to get my files back?You can buy our special decryption software, this software will allow you to recover all of your data and remove the ransomware from your computer.The price for the software is $1,500. Payment can be made in Bitcoin only. How do I pay, where do I get Bitcoin? Purchasing Bitcoin varies from country to country, you are best advised to do a quick google search yourself to find out how to buy Bitcoin. Many of our customers have reported these sites to be fast and reliable: Coinmama - hxxps://www.coinmama.com Bitpanda - hxxps://www.bitpanda.com Payment informationAmount: 0.1473766 BTC Bitcoin Address: bc1qlnzcep4l4ac0ttdrq7awxev9ehu465f2vpt9x0

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 4 IoCs
  • Drops startup file 3 IoCs
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 5 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 34 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Encrypter.vmp.exe
    "C:\Users\Admin\AppData\Local\Temp\Encrypter.vmp.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1948
    • C:\Users\Admin\AppData\Local\Temp\._cache_Encrypter.vmp.exe
      "C:\Users\Admin\AppData\Local\Temp\._cache_Encrypter.vmp.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2452
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • Drops startup file
        • Executes dropped EXE
        • Drops desktop.ini file(s)
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2880
        • C:\Windows\system32\NOTEPAD.EXE
          "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
          4⤵
          • Opens file in notepad (likely ransom note)
          PID:1388
    • C:\ProgramData\Synaptics\Synaptics.exe
      "C:\ProgramData\Synaptics\Synaptics.exe" InjUpdate
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2380
      • C:\Users\Admin\AppData\Local\Temp\._cache_Synaptics.exe
        "C:\Users\Admin\AppData\Local\Temp\._cache_Synaptics.exe" InjUpdate
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2212
        • C:\Users\Admin\AppData\Roaming\svchost.exe
          "C:\Users\Admin\AppData\Roaming\svchost.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1512
  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /automation -Embedding
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:2916

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\Synaptics\Synaptics.exe

    Filesize

    19.2MB

    MD5

    4e5fbe0a7cc9e69bd7f994d694875d86

    SHA1

    976fa55bf71c158572b4cea74f2413810bf2b568

    SHA256

    2d343433e97ee2a6f1baed3e93a66cdb07ed1ce7266bfb008f8a6e281a6adb99

    SHA512

    ff1a2fae26c49a7359afffa30cd41a700eb513f2c03c3ea994807c7b7e848f2e4a2ef585bbd6195adb553e85aabdf25446c736bdcc983ab4b3f223e87454a69d

  • C:\Users\Admin\AppData\Local\Temp\._cache_Encrypter.vmp.exe

    Filesize

    22KB

    MD5

    6ac60b3f3fc089844b316b8edcb6cbdb

    SHA1

    b4fc7bfd470f3dc67a3b3a9ddcf2dbd26dcaf2b3

    SHA256

    657c0d869ee0e44742e138b18533577b7c9bca8d40ffe5b658d80459e4f8f4d9

    SHA512

    af218350125ea6ab9da68bb2edc7dfbdb023f0fc7ff2c446059d739fccc3891ad1974882275cedd2bf42fbbf2fd9ea50fa2d149a4c5cfbd9a23fa37e29071ecf

  • C:\Users\Admin\AppData\Local\Temp\owlaFQ7X.xlsm

    Filesize

    17KB

    MD5

    e566fc53051035e1e6fd0ed1823de0f9

    SHA1

    00bc96c48b98676ecd67e81a6f1d7754e4156044

    SHA256

    8e574b4ae6502230c0829e2319a6c146aebd51b7008bf5bbfb731424d7952c15

    SHA512

    a12f56ff30ea35381c2b8f8af2446cf1daa21ee872e98cad4b863db060acd4c33c5760918c277dadb7a490cb4ca2f925d59c70dc5171e16601a11bc4a6542b04

  • C:\Users\Admin\Desktop\read_it.txt

    Filesize

    920B

    MD5

    96e58c047ee337ee491fbc24f95405a0

    SHA1

    00caeea02ff70f1e523a9d618ee22cac3b9cc30b

    SHA256

    e631d7ac377fb25957aef0cf348a9531682e88fb2c438b9e7ae828182d370419

    SHA512

    4d902a9c9a7b1b19d5e0d064da928d38c22d221405da9beb370fdef9cba252f8410a96a6d7c4e622cdccb4da1b06a92db8f09d300e7e7dc198068d9e72acb381

  • memory/1948-11-0x00000000001D0000-0x00000000001D1000-memory.dmp

    Filesize

    4KB

  • memory/1948-5-0x00000000001B0000-0x00000000001B1000-memory.dmp

    Filesize

    4KB

  • memory/1948-40-0x0000000002290000-0x0000000002291000-memory.dmp

    Filesize

    4KB

  • memory/1948-38-0x0000000002290000-0x0000000002291000-memory.dmp

    Filesize

    4KB

  • memory/1948-35-0x0000000002280000-0x0000000002281000-memory.dmp

    Filesize

    4KB

  • memory/1948-33-0x0000000002280000-0x0000000002281000-memory.dmp

    Filesize

    4KB

  • memory/1948-30-0x0000000000280000-0x0000000000281000-memory.dmp

    Filesize

    4KB

  • memory/1948-28-0x0000000000280000-0x0000000000281000-memory.dmp

    Filesize

    4KB

  • memory/1948-23-0x0000000000270000-0x0000000000271000-memory.dmp

    Filesize

    4KB

  • memory/1948-20-0x0000000000260000-0x0000000000261000-memory.dmp

    Filesize

    4KB

  • memory/1948-18-0x0000000000260000-0x0000000000261000-memory.dmp

    Filesize

    4KB

  • memory/1948-16-0x0000000000260000-0x0000000000261000-memory.dmp

    Filesize

    4KB

  • memory/1948-15-0x00000000001D0000-0x00000000001D1000-memory.dmp

    Filesize

    4KB

  • memory/1948-13-0x00000000001D0000-0x00000000001D1000-memory.dmp

    Filesize

    4KB

  • memory/1948-0-0x00000000004A5000-0x0000000000F4B000-memory.dmp

    Filesize

    10.6MB

  • memory/1948-10-0x00000000001C0000-0x00000000001C1000-memory.dmp

    Filesize

    4KB

  • memory/1948-8-0x00000000001C0000-0x00000000001C1000-memory.dmp

    Filesize

    4KB

  • memory/1948-44-0x0000000000400000-0x000000000227D000-memory.dmp

    Filesize

    30.5MB

  • memory/1948-3-0x00000000001B0000-0x00000000001B1000-memory.dmp

    Filesize

    4KB

  • memory/1948-1-0x00000000001B0000-0x00000000001B1000-memory.dmp

    Filesize

    4KB

  • memory/1948-45-0x0000000000400000-0x000000000227D000-memory.dmp

    Filesize

    30.5MB

  • memory/1948-43-0x0000000000400000-0x000000000227D000-memory.dmp

    Filesize

    30.5MB

  • memory/1948-6-0x00000000001C0000-0x00000000001C1000-memory.dmp

    Filesize

    4KB

  • memory/1948-69-0x0000000000400000-0x000000000227D000-memory.dmp

    Filesize

    30.5MB

  • memory/1948-67-0x00000000004A5000-0x0000000000F4B000-memory.dmp

    Filesize

    10.6MB

  • memory/1948-25-0x0000000000270000-0x0000000000271000-memory.dmp

    Filesize

    4KB

  • memory/2212-173-0x0000000001340000-0x000000000134C000-memory.dmp

    Filesize

    48KB

  • memory/2380-87-0x0000000000250000-0x0000000000251000-memory.dmp

    Filesize

    4KB

  • memory/2380-85-0x0000000000250000-0x0000000000251000-memory.dmp

    Filesize

    4KB

  • memory/2380-82-0x0000000000240000-0x0000000000241000-memory.dmp

    Filesize

    4KB

  • memory/2380-80-0x0000000000240000-0x0000000000241000-memory.dmp

    Filesize

    4KB

  • memory/2380-77-0x0000000000220000-0x0000000000221000-memory.dmp

    Filesize

    4KB

  • memory/2380-75-0x0000000000220000-0x0000000000221000-memory.dmp

    Filesize

    4KB

  • memory/2452-58-0x00000000010C0000-0x00000000010CC000-memory.dmp

    Filesize

    48KB

  • memory/2880-105-0x0000000000810000-0x000000000081C000-memory.dmp

    Filesize

    48KB