Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-11-2024 15:05

General

  • Target

    1f785691c057f5062ac9d630cf304ad946c825928c87e63172f335e96beddda1.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 2 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 6 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1f785691c057f5062ac9d630cf304ad946c825928c87e63172f335e96beddda1.exe
    "C:\Users\Admin\AppData\Local\Temp\1f785691c057f5062ac9d630cf304ad946c825928c87e63172f335e96beddda1.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:1968
    • C:\Users\Admin\AppData\Local\Temp\1f785691c057f5062ac9d630cf304ad946c825928c87e63172f335e96beddda1.exe
      "C:\Users\Admin\AppData\Local\Temp\1f785691c057f5062ac9d630cf304ad946c825928c87e63172f335e96beddda1.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:3764
      • C:\Users\Admin\AppData\Local\Temp\1f785691c057f5062ac9d630cf304ad946c825928c87e63172f335e96beddda1.exe
        C:\Users\Admin\AppData\Local\Temp\1f785691c057f5062ac9d630cf304ad946c825928c87e63172f335e96beddda1.exe /stext "C:\Users\Admin\AppData\Local\Temp\tsxbrxfendwmqxpbflaeho"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:4068
      • C:\Users\Admin\AppData\Local\Temp\1f785691c057f5062ac9d630cf304ad946c825928c87e63172f335e96beddda1.exe
        C:\Users\Admin\AppData\Local\Temp\1f785691c057f5062ac9d630cf304ad946c825928c87e63172f335e96beddda1.exe /stext "C:\Users\Admin\AppData\Local\Temp\wmcurpxgblozbelfovnfstwbhq"
        3⤵
        • Accesses Microsoft Outlook accounts
        • System Location Discovery: System Language Discovery
        PID:1424
      • C:\Users\Admin\AppData\Local\Temp\1f785691c057f5062ac9d630cf304ad946c825928c87e63172f335e96beddda1.exe
        C:\Users\Admin\AppData\Local\Temp\1f785691c057f5062ac9d630cf304ad946c825928c87e63172f335e96beddda1.exe /stext "C:\Users\Admin\AppData\Local\Temp\gpimkiizptgedszjfgzzdgqkhwjbk"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3320

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    cd6ce4760f61cf00cccad4d84824f3ce

    SHA1

    fc2b0bf56df51f7e58f9fa07ddae518b0ff46632

    SHA256

    3e6991f699e4840c5b8f449ac8c93121aef7e21d633070fd1957c75fa221018b

    SHA512

    d2d01008588fc82439fd8fa2d5250372cd4a9558800636c0c1c22898050458ae2d107401b0500f95c42489b9186297b2a6078fd94b6a789c40d37bfdb9bc553a

  • C:\Users\Admin\AppData\Local\Temp\nsw7D4F.tmp\System.dll

    Filesize

    11KB

    MD5

    fc3772787eb239ef4d0399680dcc4343

    SHA1

    db2fa99ec967178cd8057a14a428a8439a961a73

    SHA256

    9b93c61c9d63ef8ec80892cc0e4a0877966dca9b0c3eb85555cebd2ddf4d6eed

    SHA512

    79e491ca4591a5da70116114b7fbb66ee15a0532386035e980c9dfe7afb59b1f9d9c758891e25bfb45c36b07afd3e171bac37a86c887387ef0e80b1eaf296c89

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

    Filesize

    4KB

    MD5

    75379d3dcbcea6a69bc75b884816dd40

    SHA1

    7e073a03c3bdbbc60375ddbe56bba211c3d412a6

    SHA256

    cab559f3bbe4a0beb194dffca723b3072184b92687100462eaab04d66fff8de9

    SHA512

    710c2cee369a57a0039fc0d0c59de6118780210ef60ad0daf374f03ba94ab08039bc2aff821f7c99a0ecd0e16189c52e5b6d630b3d541f7b11375f134b985e8c

  • memory/1424-46-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1424-42-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1424-47-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1424-44-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1424-41-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1968-25-0x0000000004A20000-0x000000000634C000-memory.dmp

    Filesize

    25.2MB

  • memory/1968-28-0x0000000004A20000-0x000000000634C000-memory.dmp

    Filesize

    25.2MB

  • memory/1968-26-0x0000000077C21000-0x0000000077D41000-memory.dmp

    Filesize

    1.1MB

  • memory/1968-27-0x0000000010004000-0x0000000010005000-memory.dmp

    Filesize

    4KB

  • memory/3320-52-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/3320-51-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/3320-59-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/3320-56-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/3320-53-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/3764-72-0x0000000000490000-0x00000000016E4000-memory.dmp

    Filesize

    18.3MB

  • memory/3764-30-0x0000000077CA8000-0x0000000077CA9000-memory.dmp

    Filesize

    4KB

  • memory/3764-55-0x0000000077C21000-0x0000000077D41000-memory.dmp

    Filesize

    1.1MB

  • memory/3764-108-0x0000000000490000-0x00000000016E4000-memory.dmp

    Filesize

    18.3MB

  • memory/3764-105-0x0000000000490000-0x00000000016E4000-memory.dmp

    Filesize

    18.3MB

  • memory/3764-102-0x0000000000490000-0x00000000016E4000-memory.dmp

    Filesize

    18.3MB

  • memory/3764-36-0x00000000016F0000-0x000000000301C000-memory.dmp

    Filesize

    25.2MB

  • memory/3764-34-0x0000000000490000-0x00000000016E4000-memory.dmp

    Filesize

    18.3MB

  • memory/3764-93-0x0000000000490000-0x00000000016E4000-memory.dmp

    Filesize

    18.3MB

  • memory/3764-31-0x0000000077CC5000-0x0000000077CC6000-memory.dmp

    Filesize

    4KB

  • memory/3764-65-0x0000000034000000-0x0000000034019000-memory.dmp

    Filesize

    100KB

  • memory/3764-68-0x0000000034000000-0x0000000034019000-memory.dmp

    Filesize

    100KB

  • memory/3764-69-0x0000000034000000-0x0000000034019000-memory.dmp

    Filesize

    100KB

  • memory/3764-39-0x0000000000490000-0x00000000016E4000-memory.dmp

    Filesize

    18.3MB

  • memory/3764-75-0x0000000000490000-0x00000000016E4000-memory.dmp

    Filesize

    18.3MB

  • memory/3764-29-0x00000000016F0000-0x000000000301C000-memory.dmp

    Filesize

    25.2MB

  • memory/3764-78-0x0000000000490000-0x00000000016E4000-memory.dmp

    Filesize

    18.3MB

  • memory/3764-81-0x0000000000490000-0x00000000016E4000-memory.dmp

    Filesize

    18.3MB

  • memory/3764-84-0x0000000000490000-0x00000000016E4000-memory.dmp

    Filesize

    18.3MB

  • memory/3764-87-0x0000000000490000-0x00000000016E4000-memory.dmp

    Filesize

    18.3MB

  • memory/3764-90-0x0000000000490000-0x00000000016E4000-memory.dmp

    Filesize

    18.3MB

  • memory/4068-63-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/4068-38-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/4068-45-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/4068-43-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB