Analysis

  • max time kernel
    148s
  • max time network
    142s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    25-08-2024 01:07

General

  • Target

    3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe

  • Size

    3.5MB

  • MD5

    2e5655f2cfebe6357e6388e678f3c073

  • SHA1

    f1d6b68d73a8da906368837c1cde74a26a900858

  • SHA256

    3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d

  • SHA512

    13477f0bc9a73809e7b069dc441c7fb0023178811f4fe3f39ccbc4b4c412516b612439d8025b0c79c33201c791b343cdcf7dec4a3fe7eabcd3e28b1cf520747f

  • SSDEEP

    98304:cUROmKjJqajychmAfNKcA+hv5r61JD4XEdGic/7FW:TsqzcEAfhrr0D4UdGb/hW

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.3.101.172:9674

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

    Log

  • keylog_path

    %Temp%

  • mouse_option

    false

  • mutex

    Rmc-54ZTI0

  • 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.

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Detected Nirsoft tools 3 IoCs

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

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Themida packer 3 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 4 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 19 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
    "C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Loads dropped DLL
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • 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:2096
    • C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
      C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe /stext "C:\Users\Admin\AppData\Local\Temp\nvyptnddmrlijrrmfsgifjrnuqvdx"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      PID:2632
    • C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
      C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe /stext "C:\Users\Admin\AppData\Local\Temp\qxliufnezzdnuxoqwdajqwmwdwneyqfd"
      2⤵
      • Accesses Microsoft Outlook accounts
      • System Location Discovery: System Language Discovery
      PID:2960
    • C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
      C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe /stext "C:\Users\Admin\AppData\Local\Temp\asrb"
      2⤵
        PID:2072
      • C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe
        C:\Users\Admin\AppData\Local\Temp\3c74031a1ddcfbff9691d2992ecd540eb82c4b781bda9ffc5125d40ec712589d.exe /stext "C:\Users\Admin\AppData\Local\Temp\asrb"
        2⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:2620

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\Log\logs.dat

      Filesize

      144B

      MD5

      2ecc99efea575ef097c2ff95aceb0e2f

      SHA1

      980bff1bb92738f6f7fdb6020d77ead02bd9771e

      SHA256

      387ddc2280a57e54545e47b27b552eb5440d2e5d46299ddc70a483b9b813ecd2

      SHA512

      e4e8bdda5e974294f0da1d2984118c498d5ff596b6118cc261587819e71259ad227a541facc185a264b49d0eaea67c087bdaddac48cf35ccc98147abee505958

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

      Filesize

      2B

      MD5

      f3b25701fe362ec84616a93a45ce9998

      SHA1

      d62636d8caec13f04e28442a0a6fa1afeb024bbb

      SHA256

      b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

      SHA512

      98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

    • \Users\Admin\AppData\Local\Temp\57613b55.dll

      Filesize

      8KB

      MD5

      e1db733e43aa8d065fb7e8669db76524

      SHA1

      3f9c62ee28959959271632fdc7f5387d539a1d23

      SHA256

      9e65d9e8ebb895f3b03c95ce64f044c70251fff444a4bcbee83f558b599a614d

      SHA512

      3f6106f32932e72d197865f7b796eba072c8ab20c22b4d205f27de9b9fc6c139be8450ae25541fbdac37a06bc3ec2d1fab3f9b3216201a9231b70fcde6fb8eb3

    • memory/2072-65-0x0000000000B10000-0x0000000001472000-memory.dmp

      Filesize

      9.4MB

    • memory/2096-68-0x0000000007C60000-0x00000000085C2000-memory.dmp

      Filesize

      9.4MB

    • memory/2096-13-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2096-11-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2096-16-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-9-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2096-8-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2096-7-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2096-6-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2096-5-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2096-4-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2096-3-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2096-2-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2096-1-0x00000000760FE000-0x00000000760FF000-memory.dmp

      Filesize

      4KB

    • memory/2096-127-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-27-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-28-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-33-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-32-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2096-31-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-34-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2096-35-0x0000000000B10000-0x0000000001472000-memory.dmp

      Filesize

      9.4MB

    • memory/2096-36-0x0000000000B10000-0x0000000001472000-memory.dmp

      Filesize

      9.4MB

    • memory/2096-37-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-38-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-40-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-39-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-42-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-126-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-49-0x0000000007C60000-0x00000000085C2000-memory.dmp

      Filesize

      9.4MB

    • memory/2096-114-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-64-0x0000000007C60000-0x00000000085C2000-memory.dmp

      Filesize

      9.4MB

    • memory/2096-115-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-103-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-0-0x0000000000B10000-0x0000000001472000-memory.dmp

      Filesize

      9.4MB

    • memory/2096-93-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-92-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-15-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-87-0x0000000007C60000-0x00000000085C2000-memory.dmp

      Filesize

      9.4MB

    • memory/2096-86-0x0000000007C60000-0x00000000085C2000-memory.dmp

      Filesize

      9.4MB

    • memory/2096-59-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2096-85-0x0000000007C60000-0x00000000085C2000-memory.dmp

      Filesize

      9.4MB

    • memory/2096-84-0x0000000010000000-0x000000001007F000-memory.dmp

      Filesize

      508KB

    • memory/2096-80-0x0000000002D20000-0x0000000002D39000-memory.dmp

      Filesize

      100KB

    • memory/2096-81-0x0000000002D20000-0x0000000002D39000-memory.dmp

      Filesize

      100KB

    • memory/2096-67-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2096-77-0x0000000002D20000-0x0000000002D39000-memory.dmp

      Filesize

      100KB

    • memory/2096-14-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2096-66-0x00000000760FE000-0x00000000760FF000-memory.dmp

      Filesize

      4KB

    • memory/2096-12-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2096-10-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2620-61-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/2620-62-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/2620-63-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/2620-69-0x0000000000B10000-0x0000000001472000-memory.dmp

      Filesize

      9.4MB

    • memory/2620-60-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

      Filesize

      4KB

    • memory/2632-57-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2632-56-0x0000000000B10000-0x0000000001472000-memory.dmp

      Filesize

      9.4MB

    • memory/2632-47-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2632-48-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2632-75-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2632-46-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2960-52-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2960-58-0x00000000760F0000-0x0000000076137000-memory.dmp

      Filesize

      284KB

    • memory/2960-55-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2960-54-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2960-50-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

      Filesize

      4KB