Analysis

  • max time kernel
    299s
  • max time network
    282s
  • platform
    windows10-1703_x64
  • resource
    win10-20240611-en
  • resource tags

    arch:x64arch:x86image:win10-20240611-enlocale:en-usos:windows10-1703-x64system
  • submitted
    25-07-2024 22:37

General

  • Target

    471ec39d465941f831c4b1bec39996aa7b787e7f8d3a06f9d025fa9c9b8537f6.exe

  • Size

    487KB

  • MD5

    5327529c5c33088166eeeb548fdcdfa7

  • SHA1

    8fe61924fb9f9d4fa6adf9b41c64d5c7195212d4

  • SHA256

    471ec39d465941f831c4b1bec39996aa7b787e7f8d3a06f9d025fa9c9b8537f6

  • SHA512

    248b3936eaf64bec6392345eb2fa3e406b8861344dc929711cf2b9fd47b9c8cb28968e71e30f541faa2a005ef0660013936d102160011d4367ea75af8e9a15af

  • SSDEEP

    6144:Q+4mv/iO7BjWA1S6rvVjqoLC3Hy+Wk8kZUV6JzxiNKqByJwU3hyoGRp/Y11POC4X:S4/iODBpu5ZEAYNrxoGv/YT4DwBr4uG

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

127.0.0.1:52121

officerem.duckdns.org:52121

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-UNX1LL

  • 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 8 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

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\471ec39d465941f831c4b1bec39996aa7b787e7f8d3a06f9d025fa9c9b8537f6.exe
    "C:\Users\Admin\AppData\Local\Temp\471ec39d465941f831c4b1bec39996aa7b787e7f8d3a06f9d025fa9c9b8537f6.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1856
    • C:\Users\Admin\AppData\Local\Temp\471ec39d465941f831c4b1bec39996aa7b787e7f8d3a06f9d025fa9c9b8537f6.exe
      C:\Users\Admin\AppData\Local\Temp\471ec39d465941f831c4b1bec39996aa7b787e7f8d3a06f9d025fa9c9b8537f6.exe /stext "C:\Users\Admin\AppData\Local\Temp\odhenqgvdrtshnlxzqxqhxqjia"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      PID:1636
    • C:\Users\Admin\AppData\Local\Temp\471ec39d465941f831c4b1bec39996aa7b787e7f8d3a06f9d025fa9c9b8537f6.exe
      C:\Users\Admin\AppData\Local\Temp\471ec39d465941f831c4b1bec39996aa7b787e7f8d3a06f9d025fa9c9b8537f6.exe /stext "C:\Users\Admin\AppData\Local\Temp\yfuwnbrwralxjbzbqbsrskcsrpielh"
      2⤵
      • Accesses Microsoft Outlook accounts
      • System Location Discovery: System Language Discovery
      PID:348
    • C:\Users\Admin\AppData\Local\Temp\471ec39d465941f831c4b1bec39996aa7b787e7f8d3a06f9d025fa9c9b8537f6.exe
      C:\Users\Admin\AppData\Local\Temp\471ec39d465941f831c4b1bec39996aa7b787e7f8d3a06f9d025fa9c9b8537f6.exe /stext "C:\Users\Admin\AppData\Local\Temp\jzzpgtbqfidcthwfamflvpxjavanesuwf"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:240

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    3c4b53218f625e71727326fe587a0450

    SHA1

    15abb5660d14c6f9b333e8bd2c1142e5c6e96780

    SHA256

    4dd1c4b7940437e40f940da76a242a66d399d037096cdc58a76d1ddb9d1501e1

    SHA512

    acf6a56628500d1894ae2df6bfacbfb8090019c26ba21d95787005e66bba08d56f4ab3fa0ce141c6ac0162cc2c13cbc19d12d452c913fccbad4561685ba20c49

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

    Filesize

    4KB

    MD5

    cf70081214a8e81a7674e4743b19632d

    SHA1

    a370bf282dd34e9f95cc136217d8edacfbbb9891

    SHA256

    e3743a0f13603df1b7789ba10a6121034694de94c097fe237cc407fe26fc7d7d

    SHA512

    7a43aa15fc46d90b6985a48d4dfb9bd356e134c285a3829e32abb5c1ce84e86b134176cc60b387a529b21a9912bb865004c52465674836c450d58a139a867372

  • memory/240-31-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/240-22-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/240-30-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/240-32-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/348-20-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/348-24-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/348-26-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/348-28-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/348-33-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1636-38-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1636-21-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1636-27-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1636-18-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1636-25-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1856-7-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB

  • memory/1856-0-0x0000000000590000-0x0000000000615000-memory.dmp

    Filesize

    532KB

  • memory/1856-11-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB

  • memory/1856-12-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB

  • memory/1856-10-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB

  • memory/1856-9-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB

  • memory/1856-16-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB

  • memory/1856-8-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB

  • memory/1856-15-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB

  • memory/1856-5-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB

  • memory/1856-6-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB

  • memory/1856-14-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB

  • memory/1856-2-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB

  • memory/1856-40-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/1856-44-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/1856-43-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/1856-46-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB

  • memory/1856-47-0x0000000000590000-0x0000000000615000-memory.dmp

    Filesize

    532KB

  • memory/1856-49-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB

  • memory/1856-1-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB

  • memory/1856-55-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB

  • memory/1856-56-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB

  • memory/1856-66-0x00000000006F0000-0x0000000000772000-memory.dmp

    Filesize

    520KB