Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-05-2024 10:45

General

  • Target

    823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a.exe

  • Size

    368KB

  • MD5

    268487b76a5c0ff4ef16f16adcfd8b57

  • SHA1

    73ab922037d9af5f27b865ef9d660006a286bcb8

  • SHA256

    823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a

  • SHA512

    ef20ac2732ab96f68f1a7431efefa2f24cc3c813002d9cfeddded96d6371a229ba3a4164c950a15db5df1b93b1d7ce335eaa4969d033feef4591b752c242c917

  • SSDEEP

    6144:jp+ggOIV4ALiGvn5W8ILY3dmex6OdjLBsM5qPVUH5i:FdY4AJBWs3dmex7dxBqyHM

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

93.95.115.2:9462

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-VI6D4O

  • 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.

  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 8 IoCs
  • 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.

  • 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).

  • 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\823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a.exe
    "C:\Users\Admin\AppData\Local\Temp\823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Drops file in Windows directory
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:2796
    • C:\Users\Admin\AppData\Local\Temp\823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a.exe
      "C:\Users\Admin\AppData\Local\Temp\823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a.exe"
      2⤵
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1960
      • C:\Users\Admin\AppData\Local\Temp\823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a.exe
        C:\Users\Admin\AppData\Local\Temp\823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a.exe /stext "C:\Users\Admin\AppData\Local\Temp\perabilcpvgzdciydwgahwnlujtjqwj"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:3872
      • C:\Users\Admin\AppData\Local\Temp\823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a.exe
        C:\Users\Admin\AppData\Local\Temp\823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a.exe /stext "C:\Users\Admin\AppData\Local\Temp\zgwluawwddyefiecmhttsjiuvplsjhaneu"
        3⤵
        • Accesses Microsoft Outlook accounts
        PID:2172
      • C:\Users\Admin\AppData\Local\Temp\823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a.exe
        C:\Users\Admin\AppData\Local\Temp\823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a.exe /stext "C:\Users\Admin\AppData\Local\Temp\cacdvt"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1280

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    8a22e5bcab584e6bd809ff51ea60163d

    SHA1

    55a6b5ac36ff92e74dac492b994857179ff693f4

    SHA256

    c98f4738b515080de684eb377583196655fece94e4f3cee668316a33b5dc9b7f

    SHA512

    21bfebd4d0b3b6ec0c41aa13bdeff450663c1bfab5cb3456ffdff3cfd11c59e322096a54f448402d97d9fa9c1f99cd603d40121d766b4e49a3133847c1b3be12

  • C:\Users\Admin\AppData\Local\Temp\nsd5C3B.tmp\System.dll

    Filesize

    11KB

    MD5

    75ed96254fbf894e42058062b4b4f0d1

    SHA1

    996503f1383b49021eb3427bc28d13b5bbd11977

    SHA256

    a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

    SHA512

    58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

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

    Filesize

    4KB

    MD5

    73ddf6cd83c2ad8a2fbb2383e322ffbc

    SHA1

    05270f8bb7b5cc6ab9a61ae7453d047379089147

    SHA256

    0ef9194c6e90b23c416316fc5a15f549ee5b2472014fcd7648d72ca9a865b409

    SHA512

    714db1956faa795005b15324b9604105881d6b484fe899876fe0df85783c61a72f556a875833af8625625212503b95eea2eb353a1d98f6a7af47a3658ea5262d

  • memory/1280-41-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1280-42-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1280-40-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1280-44-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1280-45-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1960-83-0x0000000000480000-0x00000000016D4000-memory.dmp

    Filesize

    18.3MB

  • memory/1960-17-0x00000000016E0000-0x00000000023E9000-memory.dmp

    Filesize

    13.0MB

  • memory/1960-80-0x0000000000480000-0x00000000016D4000-memory.dmp

    Filesize

    18.3MB

  • memory/1960-77-0x0000000000480000-0x00000000016D4000-memory.dmp

    Filesize

    18.3MB

  • memory/1960-74-0x0000000000480000-0x00000000016D4000-memory.dmp

    Filesize

    18.3MB

  • memory/1960-71-0x0000000000480000-0x00000000016D4000-memory.dmp

    Filesize

    18.3MB

  • memory/1960-21-0x0000000000480000-0x00000000016D4000-memory.dmp

    Filesize

    18.3MB

  • memory/1960-59-0x00000000016E0000-0x00000000023E9000-memory.dmp

    Filesize

    13.0MB

  • memory/1960-20-0x0000000077375000-0x0000000077376000-memory.dmp

    Filesize

    4KB

  • memory/1960-18-0x0000000077358000-0x0000000077359000-memory.dmp

    Filesize

    4KB

  • memory/1960-68-0x0000000000480000-0x00000000016D4000-memory.dmp

    Filesize

    18.3MB

  • memory/1960-25-0x00000000772D1000-0x00000000773F1000-memory.dmp

    Filesize

    1.1MB

  • memory/1960-86-0x0000000000480000-0x00000000016D4000-memory.dmp

    Filesize

    18.3MB

  • memory/1960-65-0x0000000000480000-0x00000000016D4000-memory.dmp

    Filesize

    18.3MB

  • memory/1960-89-0x0000000000480000-0x00000000016D4000-memory.dmp

    Filesize

    18.3MB

  • memory/1960-62-0x0000000000480000-0x00000000016D4000-memory.dmp

    Filesize

    18.3MB

  • memory/1960-61-0x00000000772D1000-0x00000000773F1000-memory.dmp

    Filesize

    1.1MB

  • memory/1960-98-0x0000000000480000-0x00000000016D4000-memory.dmp

    Filesize

    18.3MB

  • memory/1960-52-0x0000000032D70000-0x0000000032D89000-memory.dmp

    Filesize

    100KB

  • memory/1960-56-0x0000000032D70000-0x0000000032D89000-memory.dmp

    Filesize

    100KB

  • memory/1960-55-0x0000000032D70000-0x0000000032D89000-memory.dmp

    Filesize

    100KB

  • memory/1960-57-0x0000000000480000-0x00000000016D4000-memory.dmp

    Filesize

    18.3MB

  • memory/2172-30-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2172-33-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2172-35-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2172-31-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2796-19-0x0000000004900000-0x0000000005609000-memory.dmp

    Filesize

    13.0MB

  • memory/2796-26-0x0000000004900000-0x0000000005609000-memory.dmp

    Filesize

    13.0MB

  • memory/2796-16-0x0000000074134000-0x0000000074135000-memory.dmp

    Filesize

    4KB

  • memory/2796-15-0x00000000772D1000-0x00000000773F1000-memory.dmp

    Filesize

    1.1MB

  • memory/2796-14-0x0000000004900000-0x0000000005609000-memory.dmp

    Filesize

    13.0MB

  • memory/3872-29-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3872-36-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3872-32-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3872-27-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3872-48-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB