Analysis

  • max time kernel
    148s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    20-03-2024 02:08

General

  • Target

    2d7ed09200c40b2f12d11415ea4f46e4b35b03d7e34b11e0e3339dc4e8ed687e.vbs

  • Size

    520KB

  • MD5

    a32d581b0e933298fdad8007f0bc4f48

  • SHA1

    9ee67035856075573f66028e4694a999e647d744

  • SHA256

    2d7ed09200c40b2f12d11415ea4f46e4b35b03d7e34b11e0e3339dc4e8ed687e

  • SHA512

    2da41cbd5eaf178db7cf6d20cac1cafcaca02d042d5661b719ff364831164fe894443bd6bfbf78db7baaa1fae3e70e3795fe74986dd81042f3e67cc50f62ead6

  • SSDEEP

    12288:/2q1MBozZxA1VEWdNIb/1UYe0kagh//3PBLXgIe:TCBaQOWd81Uakzx/PBLXU

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

185.255.114.127:2404

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-E6UWII

  • 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.

  • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 29 IoCs
  • Detects executables built or packed with MPress PE compressor 17 IoCs
  • Detects executables packed with ConfuserEx Mod 4 IoCs
  • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 2 IoCs
  • Detects executables referencing many email and collaboration clients. Observed in information stealers 2 IoCs
  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 6 IoCs
  • Executes dropped EXE 1 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\2d7ed09200c40b2f12d11415ea4f46e4b35b03d7e34b11e0e3339dc4e8ed687e.vbs"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2828
    • C:\Users\Admin\AppData\Local\Temp\payload.exe
      "C:\Users\Admin\AppData\Local\Temp\payload.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:2552
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe"
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2548
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\xymoemedlasmanltwpebtr"
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:1632
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\htrgewoehikrctzxnarcwwvbx"
          4⤵
          • Accesses Microsoft Outlook accounts
          PID:336
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\knxzfpzyvqcenhvjxlmwhjqsgilvp"
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1036

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    76b3629ecbb1184d70e6dcb2510d7d0c

    SHA1

    e48a3b5bbece6db8853d21421a76d33f5d0f9ce8

    SHA256

    e555822cb7227fe33e7b1b7c0dbe72897faa2f28872ede81449190646733f6a4

    SHA512

    f5da975d6c1af69b2200acb3c60cd789027ad56a220ce4ec76e0df4c827fe5e5ef8092da603ce05abda306990aaa1dfd2b29aa964940b5c70c18e9fecda3c660

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

    Filesize

    389KB

    MD5

    8c0877c86b2e9d59b74c245c620de3f3

    SHA1

    376b29b5166a8f4b9819e5ed298a801af83e03f9

    SHA256

    2fbab4885cb8c8b53e5afba167f6a7a14293cd2795f198c1435371f2b4f2c3a8

    SHA512

    804db8402855a8628b8744beb4ae562f2da94b3fb7fcf58b0614d741aa4c2460b2f2373f783407c80de03bd098506cfec2aec8b6d4624c2422616592b69ff7a9

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

    Filesize

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • memory/336-45-0x0000000000400000-0x0000000000457000-memory.dmp

    Filesize

    348KB

  • memory/336-70-0x0000000000400000-0x0000000000457000-memory.dmp

    Filesize

    348KB

  • memory/336-55-0x0000000000400000-0x0000000000457000-memory.dmp

    Filesize

    348KB

  • memory/336-52-0x0000000000400000-0x0000000000457000-memory.dmp

    Filesize

    348KB

  • memory/1036-59-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1036-58-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1036-56-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1036-51-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1036-48-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1632-64-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1632-46-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1632-47-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1632-41-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2548-21-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2548-13-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-30-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-31-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-29-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-110-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-26-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-33-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-32-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-34-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-35-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-37-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-24-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-20-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-22-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-19-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-18-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-15-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-17-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-16-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-11-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-25-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-109-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-102-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-101-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-67-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-68-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-69-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2548-94-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-73-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2548-74-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2548-75-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2548-76-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-78-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-93-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-83-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2548-85-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2548-86-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2552-6-0x0000000000F30000-0x0000000000F96000-memory.dmp

    Filesize

    408KB

  • memory/2552-7-0x00000000746C0000-0x0000000074DAE000-memory.dmp

    Filesize

    6.9MB

  • memory/2552-8-0x0000000000D90000-0x0000000000DF6000-memory.dmp

    Filesize

    408KB

  • memory/2552-9-0x00000000008D0000-0x0000000000910000-memory.dmp

    Filesize

    256KB

  • memory/2552-10-0x0000000000200000-0x000000000020A000-memory.dmp

    Filesize

    40KB

  • memory/2552-27-0x00000000746C0000-0x0000000074DAE000-memory.dmp

    Filesize

    6.9MB