Analysis

  • max time kernel
    148s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    13/02/2024, 02:40

General

  • Target

    3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe

  • Size

    1.0MB

  • MD5

    e5d2981fd9c531b3cfb780cf781bac91

  • SHA1

    aaf7084c369138eb5588051eda8aec9aa3c4ac26

  • SHA256

    3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b

  • SHA512

    ec10e5de423564c17caac9e3c8a4ab2d1ed51882c9cfe145374d69e9f18382d7bd23d370f0389fb56c3b77073da11351978e803dc53c7135e618bbf0507be539

  • SSDEEP

    24576:Aazz87bccsW43UyDBU7RCFYK9i3iOpOnC+yqiQDi/DtS:AOz8732BdUCYK9i3X6CPqinDo

Malware Config

Extracted

Family

remcos

Botnet

P2-bin

C2

84.38.132.126:61445

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-ANE1CN

  • 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.

  • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 28 IoCs
  • Detects executables built or packed with MPress PE compressor 19 IoCs
  • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 3 IoCs
  • Detects executables referencing many email and collaboration clients. Observed in information stealers 3 IoCs
  • NirSoft MailPassView 3 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 8 IoCs
  • 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 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
    "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1236
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2936
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\bZurkfs.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2832
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\bZurkfs" /XML "C:\Users\Admin\AppData\Local\Temp\tmp50CE.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2680
    • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
      "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2636
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\duzopabmglegcbumxgqhdlcjt"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:328
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\gxegqsuoutwlepqqhrdagywaufpic"
        3⤵
        • Accesses Microsoft Outlook accounts
        PID:1032
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\qrjrrlfhiboqovfuycqcrdjjdmhrvpra"
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2236

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    f185b942e2b36cce42dbcd5dc39f52f5

    SHA1

    13864f31287efe09d4b8a7ca22532e922e0ea0e1

    SHA256

    cb322d920e5bf2a13e4247c41b7da8f2c84bbce9733e99025e4cd2188f9d2c7b

    SHA512

    f4b7adc31a3c3fd45c2a35369921810379c0f45bd740fe305e963b28d6314440ef94a623543527cd27d7a01691a6e7e7fb268ce7caa1448a33ba029c1faec93c

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

    Filesize

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • C:\Users\Admin\AppData\Local\Temp\tmp50CE.tmp

    Filesize

    1KB

    MD5

    6b3a22c6ef6bb30074e7e34c9703753d

    SHA1

    75e1f437d4dc2bcae9e1a7856d9436e2ac2b13d6

    SHA256

    5b52a128b8e24f54468a2784e64f4111b1a7cdd84aa5bb3b26b32a465beb9832

    SHA512

    6e0ca476e19ec30f091ed0e76f080ab8ae5f042d2fd6b027618d3f7aa464475049a8034cca8111b81db0f748a76b561270521c6efcbae26009dd00019c34cad7

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\N3Z8H7P8J8LNIYSTVC3M.temp

    Filesize

    7KB

    MD5

    30aab212b03d03018a89c2ccd71cb3ef

    SHA1

    0f5ecd45183a3c697c583108667d66ef49db63cb

    SHA256

    dcba42f1ed27a6d2f3c80867ab0d977e0b8174f624154fdc9c843eeef0816290

    SHA512

    b53531767d70e672b53249942d9496e9633795e39b6e69a5977f8128db0c94064730ac3d0a3d5aca9b03efda68b31024e55129c7656e1d9a535e9d3bb51b7813

  • memory/328-76-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/328-92-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/328-68-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/328-66-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/328-72-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1032-81-0x0000000000400000-0x0000000000457000-memory.dmp

    Filesize

    348KB

  • memory/1032-78-0x0000000000400000-0x0000000000457000-memory.dmp

    Filesize

    348KB

  • memory/1032-80-0x0000000000400000-0x0000000000457000-memory.dmp

    Filesize

    348KB

  • memory/1032-73-0x0000000000400000-0x0000000000457000-memory.dmp

    Filesize

    348KB

  • memory/1032-95-0x0000000000400000-0x0000000000457000-memory.dmp

    Filesize

    348KB

  • memory/1236-6-0x00000000075E0000-0x00000000076A6000-memory.dmp

    Filesize

    792KB

  • memory/1236-49-0x0000000074300000-0x00000000749EE000-memory.dmp

    Filesize

    6.9MB

  • memory/1236-5-0x0000000000690000-0x000000000069E000-memory.dmp

    Filesize

    56KB

  • memory/1236-4-0x0000000000680000-0x000000000068A000-memory.dmp

    Filesize

    40KB

  • memory/1236-3-0x0000000000480000-0x0000000000494000-memory.dmp

    Filesize

    80KB

  • memory/1236-2-0x0000000000D30000-0x0000000000D70000-memory.dmp

    Filesize

    256KB

  • memory/1236-1-0x0000000074300000-0x00000000749EE000-memory.dmp

    Filesize

    6.9MB

  • memory/1236-0-0x00000000010C0000-0x00000000011CA000-memory.dmp

    Filesize

    1.0MB

  • memory/2236-82-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2236-85-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2236-86-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2236-87-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2236-84-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2636-56-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-39-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-48-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-53-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-132-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-125-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-52-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-51-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-24-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-22-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-57-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-26-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-58-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-60-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-61-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-59-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-63-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-64-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-65-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-41-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-43-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2636-45-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-30-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-124-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-117-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-47-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-116-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-35-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-110-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2636-108-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-107-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-102-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-96-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2636-99-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2636-19-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2636-100-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2636-101-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2832-27-0x0000000001D90000-0x0000000001DD0000-memory.dmp

    Filesize

    256KB

  • memory/2832-20-0x000000006F300000-0x000000006F8AB000-memory.dmp

    Filesize

    5.7MB

  • memory/2832-31-0x000000006F300000-0x000000006F8AB000-memory.dmp

    Filesize

    5.7MB

  • memory/2832-32-0x0000000001D90000-0x0000000001DD0000-memory.dmp

    Filesize

    256KB

  • memory/2832-36-0x0000000001D90000-0x0000000001DD0000-memory.dmp

    Filesize

    256KB

  • memory/2832-55-0x000000006F300000-0x000000006F8AB000-memory.dmp

    Filesize

    5.7MB

  • memory/2936-23-0x000000006F300000-0x000000006F8AB000-memory.dmp

    Filesize

    5.7MB

  • memory/2936-25-0x0000000002920000-0x0000000002960000-memory.dmp

    Filesize

    256KB

  • memory/2936-29-0x000000006F300000-0x000000006F8AB000-memory.dmp

    Filesize

    5.7MB

  • memory/2936-38-0x0000000002920000-0x0000000002960000-memory.dmp

    Filesize

    256KB

  • memory/2936-34-0x0000000002920000-0x0000000002960000-memory.dmp

    Filesize

    256KB

  • memory/2936-54-0x000000006F300000-0x000000006F8AB000-memory.dmp

    Filesize

    5.7MB