Analysis

  • max time kernel
    147s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    06-11-2024 12:37

General

  • Target

    RFQ 6000208225.exe

  • Size

    1.3MB

  • MD5

    3392cd428f177152dcf9ac6256365b1a

  • SHA1

    3e454db1c2d909510594a48efbe0380c3194aa2f

  • SHA256

    1f785691c057f5062ac9d630cf304ad946c825928c87e63172f335e96beddda1

  • SHA512

    53265bead60447f7dd26db363dfe3a698d83c51019c4fa1d51907d5166cd53e11dae4da51ee3ebe162f0313ac6b2971a0a3904a4738fde116d835eab4c4d53bb

  • SSDEEP

    24576:Z6k1f9gIpCzUjadgzQdbzyoxSyz74WCePDMoqno2NND74lams:ZJFmSCzyApoy/p3PDP6Ela3

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

212.162.149.220:2404

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-2JYO24

  • 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 8 IoCs

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

  • NirSoft MailPassView 3 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
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 4 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 5 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:2300
    • C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe
      "C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe"
      2⤵
      • 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:2964
      • C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe
        "C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe" /stext "C:\Users\Admin\AppData\Local\Temp\wffvlpgpdzepqduzlcoegwnvn"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:2684
      • C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe
        "C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe" /stext "C:\Users\Admin\AppData\Local\Temp\hitolirqrhwuajidumigjbieoewtv"
        3⤵
        • Accesses Microsoft Outlook accounts
        • System Location Discovery: System Language Discovery
        PID:2724
      • C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe
        "C:\Users\Admin\AppData\Local\Temp\RFQ 6000208225.exe" /stext "C:\Users\Admin\AppData\Local\Temp\jcyymackfpogcxehdxvzuocvxkfcopxp"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:1388

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    8ac1dbd9638470a6f6a205869a00ba68

    SHA1

    5984d595bdefa760c4c91b3da686ef0db804e605

    SHA256

    df6248a62c64e054315f0b55bbf8db4f59cd714a43bde7f3bb998e53091da079

    SHA512

    20fdc612785052a7f30d14c9ef4567266ee9bb73ea77ac40857b4ff6507ca0fe55eb7ea53c9b417f7f59e2283804a8b76be41d89dd5c4da085265aa2c4e1766f

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

    Filesize

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • \Users\Admin\AppData\Local\Temp\nseC85F.tmp\System.dll

    Filesize

    11KB

    MD5

    fc3772787eb239ef4d0399680dcc4343

    SHA1

    db2fa99ec967178cd8057a14a428a8439a961a73

    SHA256

    9b93c61c9d63ef8ec80892cc0e4a0877966dca9b0c3eb85555cebd2ddf4d6eed

    SHA512

    79e491ca4591a5da70116114b7fbb66ee15a0532386035e980c9dfe7afb59b1f9d9c758891e25bfb45c36b07afd3e171bac37a86c887387ef0e80b1eaf296c89

  • memory/1388-46-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1388-50-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1388-49-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1388-48-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2300-27-0x0000000004340000-0x0000000005C6C000-memory.dmp

    Filesize

    25.2MB

  • memory/2300-28-0x0000000076F61000-0x0000000077062000-memory.dmp

    Filesize

    1.0MB

  • memory/2300-29-0x0000000076F60000-0x0000000077109000-memory.dmp

    Filesize

    1.7MB

  • memory/2300-31-0x0000000004340000-0x0000000005C6C000-memory.dmp

    Filesize

    25.2MB

  • memory/2684-56-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2684-42-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2684-40-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2684-38-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2684-44-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2724-62-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2724-45-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2724-43-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2724-41-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2724-39-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2964-69-0x0000000000490000-0x00000000014F2000-memory.dmp

    Filesize

    16.4MB

  • memory/2964-78-0x0000000000490000-0x00000000014F2000-memory.dmp

    Filesize

    16.4MB

  • memory/2964-63-0x0000000032960000-0x0000000032979000-memory.dmp

    Filesize

    100KB

  • memory/2964-67-0x0000000032960000-0x0000000032979000-memory.dmp

    Filesize

    100KB

  • memory/2964-66-0x0000000032960000-0x0000000032979000-memory.dmp

    Filesize

    100KB

  • memory/2964-36-0x0000000000490000-0x00000000014F2000-memory.dmp

    Filesize

    16.4MB

  • memory/2964-72-0x0000000000490000-0x00000000014F2000-memory.dmp

    Filesize

    16.4MB

  • memory/2964-30-0x0000000076F60000-0x0000000077109000-memory.dmp

    Filesize

    1.7MB

  • memory/2964-75-0x0000000000490000-0x00000000014F2000-memory.dmp

    Filesize

    16.4MB

  • memory/2964-33-0x0000000000490000-0x00000000014F2000-memory.dmp

    Filesize

    16.4MB

  • memory/2964-81-0x0000000000490000-0x00000000014F2000-memory.dmp

    Filesize

    16.4MB

  • memory/2964-84-0x0000000000490000-0x00000000014F2000-memory.dmp

    Filesize

    16.4MB

  • memory/2964-87-0x0000000000490000-0x00000000014F2000-memory.dmp

    Filesize

    16.4MB

  • memory/2964-90-0x0000000000490000-0x00000000014F2000-memory.dmp

    Filesize

    16.4MB

  • memory/2964-93-0x0000000000490000-0x00000000014F2000-memory.dmp

    Filesize

    16.4MB

  • memory/2964-96-0x0000000000490000-0x00000000014F2000-memory.dmp

    Filesize

    16.4MB

  • memory/2964-99-0x0000000000490000-0x00000000014F2000-memory.dmp

    Filesize

    16.4MB

  • memory/2964-102-0x0000000000490000-0x00000000014F2000-memory.dmp

    Filesize

    16.4MB

  • memory/2964-105-0x0000000000490000-0x00000000014F2000-memory.dmp

    Filesize

    16.4MB