Analysis

  • max time kernel
    298s
  • max time network
    297s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-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 11 IoCs

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

  • NirSoft MailPassView 5 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 2 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 15 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:2392
    • C:\Users\Admin\AppData\Local\Temp\471ec39d465941f831c4b1bec39996aa7b787e7f8d3a06f9d025fa9c9b8537f6.exe
      C:\Users\Admin\AppData\Local\Temp\471ec39d465941f831c4b1bec39996aa7b787e7f8d3a06f9d025fa9c9b8537f6.exe /stext "C:\Users\Admin\AppData\Local\Temp\btxyxt"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      PID:2892
    • C:\Users\Admin\AppData\Local\Temp\471ec39d465941f831c4b1bec39996aa7b787e7f8d3a06f9d025fa9c9b8537f6.exe
      C:\Users\Admin\AppData\Local\Temp\471ec39d465941f831c4b1bec39996aa7b787e7f8d3a06f9d025fa9c9b8537f6.exe /stext "C:\Users\Admin\AppData\Local\Temp\mnkrydrlag"
      2⤵
      • Accesses Microsoft Outlook accounts
      • System Location Discovery: System Language Discovery
      PID:2776
    • C:\Users\Admin\AppData\Local\Temp\471ec39d465941f831c4b1bec39996aa7b787e7f8d3a06f9d025fa9c9b8537f6.exe
      C:\Users\Admin\AppData\Local\Temp\471ec39d465941f831c4b1bec39996aa7b787e7f8d3a06f9d025fa9c9b8537f6.exe /stext "C:\Users\Admin\AppData\Local\Temp\oppbzwcfoozoj"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:2752

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    c4510677a63d702c8af9b461c9fcda71

    SHA1

    96157a5b326b98c71967ba63404ade7fad05c9e4

    SHA256

    ede40be8e3452fc0f17caf8fcdc48fd0e7a4695e9a6e99deade7b2bc01260456

    SHA512

    57ffb2cd3c368fdd18489e2e2bfda71ceafb6d93d14997c5425d2df2fbd3dc33a39c249fe6490aa15bfeef0bf4a9ca4e5214691f158a39c5b9379a2dd1eac6b1

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

    Filesize

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • memory/2392-57-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-62-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-2-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-7-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-8-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-9-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-126-0x0000000003DB0000-0x0000000003E35000-memory.dmp

    Filesize

    532KB

  • memory/2392-11-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-12-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-14-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-125-0x0000000003D30000-0x0000000003DB5000-memory.dmp

    Filesize

    532KB

  • memory/2392-117-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-107-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-106-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-96-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-38-0x0000000003E20000-0x0000000003EA5000-memory.dmp

    Filesize

    532KB

  • memory/2392-95-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-85-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-35-0x0000000003DB0000-0x0000000003E35000-memory.dmp

    Filesize

    532KB

  • memory/2392-84-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-73-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-63-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-5-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-1-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-60-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-10-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-34-0x0000000003D30000-0x0000000003DB5000-memory.dmp

    Filesize

    532KB

  • memory/2392-0-0x0000000000590000-0x0000000000615000-memory.dmp

    Filesize

    532KB

  • memory/2392-54-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2392-6-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2392-55-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2392-51-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2752-41-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2752-28-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2752-31-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2752-32-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2752-40-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2776-39-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2776-33-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2776-25-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2776-29-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2776-50-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2892-46-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2892-37-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2892-21-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2892-19-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2892-20-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2892-16-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2892-36-0x0000000000590000-0x0000000000615000-memory.dmp

    Filesize

    532KB