Analysis

  • max time kernel
    150s
  • max time network
    142s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    13-09-2024 02:51

General

  • Target

    invoice.exe

  • Size

    1.4MB

  • MD5

    c9d77c591e284d81a87f54e086515333

  • SHA1

    e69f9859addc81b99703f7bc33fc9680df3b6d43

  • SHA256

    14534f9ecea0edc1d5fd9a220089cdd04dba9a8cf5b70334c5b15e6ad0a4860c

  • SHA512

    f4e5dc9c699d3a93155097ec71419f74c22e5cb96a83f55e0007c81ab93c751631d77462959c2385950d41b2ed43c19f71702c201c8ab412e721bbe76acd668b

  • SSDEEP

    24576:CCdxte/80jYLT3U1jfsWaAK+UbJKRWeSR813Cih0NhTIDiQ:Tw80cTsjkWaAK+UtrRU3uu

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

blakaa.duckdns.org:2404

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-BNY62M

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Detected Nirsoft tools 7 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft MailPassView 3 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\invoice.exe
    "C:\Users\Admin\AppData\Local\Temp\invoice.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1916
    • C:\Windows\SysWOW64\svchost.exe
      "C:\Users\Admin\AppData\Local\Temp\invoice.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:2692
      • C:\Windows\SysWOW64\svchost.exe
        C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\deopqviahzvwdlruofzebcqyaannz"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:2992
      • C:\Windows\SysWOW64\svchost.exe
        C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\fythrottvhnbgrgyfqmxeolpjgfwsqoj"
        3⤵
        • Accesses Microsoft Outlook accounts
        • System Location Discovery: System Language Discovery
        PID:2984
      • C:\Windows\SysWOW64\svchost.exe
        C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\qaya"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:2820

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\deopqviahzvwdlruofzebcqyaannz

    Filesize

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • memory/1916-6-0x0000000000BE0000-0x0000000000FE0000-memory.dmp

    Filesize

    4.0MB

  • memory/2692-50-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2692-7-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-11-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-12-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-13-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-14-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-16-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-15-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-18-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-60-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-58-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-57-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-56-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-54-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-53-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-52-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-51-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2692-10-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-59-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-55-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-47-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2692-45-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-9-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-43-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2692-44-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2820-33-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2820-32-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2820-35-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2984-29-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2984-34-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2984-27-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2984-24-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2984-46-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2992-41-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2992-36-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2992-28-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2992-30-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2992-21-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2992-19-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB