Analysis

  • max time kernel
    149s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    28-11-2024 19:18

General

  • Target

    bf065b1f51eb32228108a6508ff649143a97526a06b27fa6771a85246b162f84.exe

  • Size

    660KB

  • MD5

    5e1c814fc675448c381899d325aba145

  • SHA1

    46a9e1b34f90d4be128fc1b6f1d698d79c93297b

  • SHA256

    bf065b1f51eb32228108a6508ff649143a97526a06b27fa6771a85246b162f84

  • SHA512

    ea3befc73db84c42834e59198f5dd416b738c33fd1105384ff87031205888a018da7d124582d25ed8a8cea8567ef07051d1ee6fa77fe4c4b74688bcaa1e88338

  • SSDEEP

    12288:ORqeNjN24O1o46FW+iLOWIRKiKuI+v8nbDVJNtjzFwZnayIjYa9iXb8TOM:Ejoo7W+1WU2Y0nPVJNJlTYXYiM

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

mynewpro.online:2404

Attributes
  • audio_folder

    MicRecords

  • audio_path

    ApplicationPath

  • 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-B4UZRV

  • 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.

  • Remcos family
  • Detected Nirsoft tools 8 IoCs

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

  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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.

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bf065b1f51eb32228108a6508ff649143a97526a06b27fa6771a85246b162f84.exe
    "C:\Users\Admin\AppData\Local\Temp\bf065b1f51eb32228108a6508ff649143a97526a06b27fa6771a85246b162f84.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:1716
    • C:\Users\Admin\AppData\Local\Temp\bf065b1f51eb32228108a6508ff649143a97526a06b27fa6771a85246b162f84.exe
      "C:\Users\Admin\AppData\Local\Temp\bf065b1f51eb32228108a6508ff649143a97526a06b27fa6771a85246b162f84.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Modifies system certificate store
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:3056
      • C:\Users\Admin\AppData\Local\Temp\bf065b1f51eb32228108a6508ff649143a97526a06b27fa6771a85246b162f84.exe
        C:\Users\Admin\AppData\Local\Temp\bf065b1f51eb32228108a6508ff649143a97526a06b27fa6771a85246b162f84.exe /stext "C:\Users\Admin\AppData\Local\Temp\yembiq"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:3036
      • C:\Users\Admin\AppData\Local\Temp\bf065b1f51eb32228108a6508ff649143a97526a06b27fa6771a85246b162f84.exe
        C:\Users\Admin\AppData\Local\Temp\bf065b1f51eb32228108a6508ff649143a97526a06b27fa6771a85246b162f84.exe /stext "C:\Users\Admin\AppData\Local\Temp\byzljjubt"
        3⤵
        • Accesses Microsoft Outlook accounts
        • System Location Discovery: System Language Discovery
        PID:2848
      • C:\Users\Admin\AppData\Local\Temp\bf065b1f51eb32228108a6508ff649143a97526a06b27fa6771a85246b162f84.exe
        C:\Users\Admin\AppData\Local\Temp\bf065b1f51eb32228108a6508ff649143a97526a06b27fa6771a85246b162f84.exe /stext "C:\Users\Admin\AppData\Local\Temp\lafekbfuhndub"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:1316

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • \Users\Admin\AppData\Local\Temp\nsoDDB4.tmp\System.dll

    Filesize

    11KB

    MD5

    3e6bf00b3ac976122f982ae2aadb1c51

    SHA1

    caab188f7fdc84d3fdcb2922edeeb5ed576bd31d

    SHA256

    4ff9b2678d698677c5d9732678f9cf53f17290e09d053691aac4cc6e6f595cbe

    SHA512

    1286f05e6a7e6b691f6e479638e7179897598e171b52eb3a3dc0e830415251069d29416b6d1ffc6d7dce8da5625e1479be06db9b7179e7776659c5c1ad6aa706

  • memory/1316-55-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1316-59-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1316-60-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1316-57-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1316-58-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1716-28-0x0000000077A80000-0x0000000077C29000-memory.dmp

    Filesize

    1.7MB

  • memory/1716-27-0x0000000077A81000-0x0000000077B82000-memory.dmp

    Filesize

    1.0MB

  • memory/2848-75-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2848-62-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2848-56-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2848-54-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/3036-53-0x0000000077A80000-0x0000000077C29000-memory.dmp

    Filesize

    1.7MB

  • memory/3036-67-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3036-52-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3036-51-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3036-48-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3036-50-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3056-77-0x0000000000470000-0x00000000014D2000-memory.dmp

    Filesize

    16.4MB

  • memory/3056-79-0x0000000000470000-0x00000000014D2000-memory.dmp

    Filesize

    16.4MB

  • memory/3056-31-0x0000000000470000-0x00000000014D2000-memory.dmp

    Filesize

    16.4MB

  • memory/3056-70-0x0000000035D90000-0x0000000035DA9000-memory.dmp

    Filesize

    100KB

  • memory/3056-74-0x0000000035D90000-0x0000000035DA9000-memory.dmp

    Filesize

    100KB

  • memory/3056-73-0x0000000035D90000-0x0000000035DA9000-memory.dmp

    Filesize

    100KB

  • memory/3056-29-0x0000000077A80000-0x0000000077C29000-memory.dmp

    Filesize

    1.7MB

  • memory/3056-47-0x0000000000470000-0x00000000014D2000-memory.dmp

    Filesize

    16.4MB

  • memory/3056-78-0x0000000000470000-0x00000000014D2000-memory.dmp

    Filesize

    16.4MB

  • memory/3056-42-0x0000000000470000-0x00000000014D2000-memory.dmp

    Filesize

    16.4MB

  • memory/3056-80-0x0000000000470000-0x00000000014D2000-memory.dmp

    Filesize

    16.4MB

  • memory/3056-81-0x0000000000470000-0x00000000014D2000-memory.dmp

    Filesize

    16.4MB

  • memory/3056-82-0x0000000000470000-0x00000000014D2000-memory.dmp

    Filesize

    16.4MB

  • memory/3056-83-0x0000000000470000-0x00000000014D2000-memory.dmp

    Filesize

    16.4MB

  • memory/3056-84-0x0000000000470000-0x00000000014D2000-memory.dmp

    Filesize

    16.4MB

  • memory/3056-85-0x0000000000470000-0x00000000014D2000-memory.dmp

    Filesize

    16.4MB

  • memory/3056-86-0x0000000000470000-0x00000000014D2000-memory.dmp

    Filesize

    16.4MB

  • memory/3056-87-0x0000000000470000-0x00000000014D2000-memory.dmp

    Filesize

    16.4MB

  • memory/3056-88-0x0000000000470000-0x00000000014D2000-memory.dmp

    Filesize

    16.4MB