Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250211-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250211-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-02-2025 05:00

General

  • Target

    r000_ScannedwithXeroxMultifunctionPrinter.exe

  • Size

    732KB

  • MD5

    003a9a042df090f1501ac0c0c4fc0285

  • SHA1

    0209a7f124455a7d5ea4c128b774a3fc3212917d

  • SHA256

    a39ac5a508c71f482ed03ccaaf8bb799f73672fa49895f940f45051d3f5b838d

  • SHA512

    ba9a498692712ff48299da767aea61611bb72cddc372e35cbc309b9b7ffc0a5ce9eb451058c2a9ab610c5d2b74f879c025807734e2a873959212329dfa5fa4af

  • SSDEEP

    12288:fJIbMYmuXv4CgC5Lbdje79l3/LBynrcPmMe9mukxD:fJYmuXv4hILZul3/Fkcbe9md

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

216.250.252.33:60309

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-TJ7QLN

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Guloader family
  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • Remcos

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

  • Remcos family
  • Detected Nirsoft tools 7 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

  • Downloads MZ/PE file 1 IoCs
  • Loads dropped DLL 1 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 3 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

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

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • NSIS installer 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\r000_ScannedwithXeroxMultifunctionPrinter.exe
    "C:\Users\Admin\AppData\Local\Temp\r000_ScannedwithXeroxMultifunctionPrinter.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:2264
    • C:\Users\Admin\AppData\Local\Temp\r000_ScannedwithXeroxMultifunctionPrinter.exe
      "C:\Users\Admin\AppData\Local\Temp\r000_ScannedwithXeroxMultifunctionPrinter.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
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:116
      • C:\Users\Admin\AppData\Local\Temp\r000_ScannedwithXeroxMultifunctionPrinter.exe
        C:\Users\Admin\AppData\Local\Temp\r000_ScannedwithXeroxMultifunctionPrinter.exe /stext "C:\Users\Admin\AppData\Local\Temp\ghmakflnrxpnkurj"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:4932
      • C:\Users\Admin\AppData\Local\Temp\r000_ScannedwithXeroxMultifunctionPrinter.exe
        C:\Users\Admin\AppData\Local\Temp\r000_ScannedwithXeroxMultifunctionPrinter.exe /stext "C:\Users\Admin\AppData\Local\Temp\ibskdywpffhzmafnrdu"
        3⤵
        • Accesses Microsoft Outlook accounts
        • System Location Discovery: System Language Discovery
        PID:3900
      • C:\Users\Admin\AppData\Local\Temp\r000_ScannedwithXeroxMultifunctionPrinter.exe
        C:\Users\Admin\AppData\Local\Temp\r000_ScannedwithXeroxMultifunctionPrinter.exe /stext "C:\Users\Admin\AppData\Local\Temp\twxdeqoitnzexgbraggnss"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3104
  • C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
    "C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSI1IiBpbnN0YWxsZGF0ZXRpbWU9IjE3MzkyODMzNzEiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4Mzc1NDE5Mjc1MzAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1MzY2OTAwODA5Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
    1⤵
    • System Location Discovery: System Language Discovery
    • System Network Configuration Discovery: Internet Connection Discovery
    PID:1708

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    ccd148c7abd3cb332d008f4b04d3a95d

    SHA1

    6bfc113c8c7f3167224958d05c472815e6a3010b

    SHA256

    e25c902f064215f8702a1b5d3658decd0780fa65c1ca521c31252f429ea7cea5

    SHA512

    5b4ffce742f97e084dcf45ec215dd390e3701b52e139320891edf952d8737dcc3a087ac676193146a0e35b8d68ac893665e78bef6925be89a0b34278d1b438b0

  • C:\Users\Admin\AppData\Local\Temp\Acronomy\Asymmetron.exe

    Filesize

    732KB

    MD5

    003a9a042df090f1501ac0c0c4fc0285

    SHA1

    0209a7f124455a7d5ea4c128b774a3fc3212917d

    SHA256

    a39ac5a508c71f482ed03ccaaf8bb799f73672fa49895f940f45051d3f5b838d

    SHA512

    ba9a498692712ff48299da767aea61611bb72cddc372e35cbc309b9b7ffc0a5ce9eb451058c2a9ab610c5d2b74f879c025807734e2a873959212329dfa5fa4af

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

    Filesize

    4KB

    MD5

    c7fcb663e76d11b7fd82fe05a8f7aa60

    SHA1

    ac3757be6f23fc129d788af63b313aba3ae6191b

    SHA256

    a09e1825e42c3ff69c2296c14329bb872f82d95387acba48521c74a13728fda2

    SHA512

    b457ee6989babd0ca98a7a0907367f9cd0bdcaaee0a222ff55f017ac2c44b51b5ab58eb913c27771f90691f4c0c8bb6649d32703ecfc2acc37e14676a194f460

  • C:\Users\Admin\AppData\Local\Temp\nssE4E5.tmp\System.dll

    Filesize

    11KB

    MD5

    a436db0c473a087eb61ff5c53c34ba27

    SHA1

    65ea67e424e75f5065132b539c8b2eda88aa0506

    SHA256

    75ed40311875312617d6711baed0be29fcaee71031ca27a8d308a72b15a51e49

    SHA512

    908f46a855480af6eacb2fb64de0e60b1e04bbb10b23992e2cf38a4cbebdcd7d3928c4c022d7ad9f7479265a8f426b93eef580afec95570e654c360d62f5e08d

  • memory/116-81-0x0000000000470000-0x00000000016C4000-memory.dmp

    Filesize

    18.3MB

  • memory/116-99-0x0000000000470000-0x00000000016C4000-memory.dmp

    Filesize

    18.3MB

  • memory/116-23-0x0000000076FE1000-0x0000000077101000-memory.dmp

    Filesize

    1.1MB

  • memory/116-21-0x00000000016D0000-0x0000000004B20000-memory.dmp

    Filesize

    52.3MB

  • memory/116-26-0x0000000000470000-0x00000000016C4000-memory.dmp

    Filesize

    18.3MB

  • memory/116-41-0x0000000000470000-0x00000000016C4000-memory.dmp

    Filesize

    18.3MB

  • memory/116-44-0x0000000076FE1000-0x0000000077101000-memory.dmp

    Filesize

    1.1MB

  • memory/116-43-0x00000000016D0000-0x0000000004B20000-memory.dmp

    Filesize

    52.3MB

  • memory/116-111-0x0000000000470000-0x00000000016C4000-memory.dmp

    Filesize

    18.3MB

  • memory/116-105-0x0000000000470000-0x00000000016C4000-memory.dmp

    Filesize

    18.3MB

  • memory/116-102-0x0000000000470000-0x00000000016C4000-memory.dmp

    Filesize

    18.3MB

  • memory/116-76-0x0000000035A80000-0x0000000035A99000-memory.dmp

    Filesize

    100KB

  • memory/116-96-0x0000000000470000-0x00000000016C4000-memory.dmp

    Filesize

    18.3MB

  • memory/116-93-0x0000000000470000-0x00000000016C4000-memory.dmp

    Filesize

    18.3MB

  • memory/116-90-0x0000000000470000-0x00000000016C4000-memory.dmp

    Filesize

    18.3MB

  • memory/116-87-0x0000000000470000-0x00000000016C4000-memory.dmp

    Filesize

    18.3MB

  • memory/116-22-0x0000000077068000-0x0000000077069000-memory.dmp

    Filesize

    4KB

  • memory/116-84-0x0000000000470000-0x00000000016C4000-memory.dmp

    Filesize

    18.3MB

  • memory/116-77-0x0000000035A80000-0x0000000035A99000-memory.dmp

    Filesize

    100KB

  • memory/116-108-0x0000000000470000-0x00000000016C4000-memory.dmp

    Filesize

    18.3MB

  • memory/116-71-0x0000000000470000-0x00000000016C4000-memory.dmp

    Filesize

    18.3MB

  • memory/116-73-0x0000000035A80000-0x0000000035A99000-memory.dmp

    Filesize

    100KB

  • memory/2264-18-0x0000000076FE1000-0x0000000077101000-memory.dmp

    Filesize

    1.1MB

  • memory/2264-19-0x0000000076FE1000-0x0000000077101000-memory.dmp

    Filesize

    1.1MB

  • memory/2264-20-0x0000000010004000-0x0000000010005000-memory.dmp

    Filesize

    4KB

  • memory/3104-59-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/3104-64-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/3104-67-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/3104-58-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/3900-51-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/3900-56-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/3900-53-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/3900-48-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/4932-57-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/4932-49-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/4932-52-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/4932-69-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/4932-46-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB