Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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 3 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 7 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 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\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:292
    • 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:2816
      • C:\Users\Admin\AppData\Local\Temp\823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a.exe
        C:\Users\Admin\AppData\Local\Temp\823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a.exe /stext "C:\Users\Admin\AppData\Local\Temp\lmfzjyzwziijfzrchsweqtwjbdgqnjxoey"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:1964
      • C:\Users\Admin\AppData\Local\Temp\823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a.exe
        C:\Users\Admin\AppData\Local\Temp\823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a.exe /stext "C:\Users\Admin\AppData\Local\Temp\vglsjqj"
        3⤵
        • Accesses Microsoft Outlook accounts
        PID:2024
      • C:\Users\Admin\AppData\Local\Temp\823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a.exe
        C:\Users\Admin\AppData\Local\Temp\823a91ee5e3c84edd18c3e4df9321dd649e2ea5ffb79d5b91b26253a37f7c25a.exe /stext "C:\Users\Admin\AppData\Local\Temp\fjqkkjurjy"
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2684

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    828707f63ce941973ab47f49d7bd39ba

    SHA1

    b7b82ffc2beb86f248dd5e363b2fa0c773298e9c

    SHA256

    fa81439ee83eab5f88c29524c7ca984f3de2c00cbd984e9a46ddd854143ab63f

    SHA512

    6164e2c513726c5596c8a915ed21c430efc31bffc4747fd5b17a09befe4fc0d5235ad0fd9edce88b5b434bbb15da805f6198ce652a98b34aaaf04d7ad633ab47

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

    Filesize

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • \Users\Admin\AppData\Local\Temp\nsi15B4.tmp\System.dll

    Filesize

    11KB

    MD5

    75ed96254fbf894e42058062b4b4f0d1

    SHA1

    996503f1383b49021eb3427bc28d13b5bbd11977

    SHA256

    a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

    SHA512

    58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

  • memory/292-17-0x0000000077740000-0x00000000778E9000-memory.dmp

    Filesize

    1.7MB

  • memory/292-19-0x0000000003F70000-0x0000000004C79000-memory.dmp

    Filesize

    13.0MB

  • memory/292-16-0x0000000077741000-0x0000000077842000-memory.dmp

    Filesize

    1.0MB

  • memory/292-25-0x0000000003F70000-0x0000000004C79000-memory.dmp

    Filesize

    13.0MB

  • memory/292-15-0x0000000003F70000-0x0000000004C79000-memory.dmp

    Filesize

    13.0MB

  • memory/1964-34-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1964-48-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1964-27-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1964-29-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1964-31-0x0000000077740000-0x00000000778E9000-memory.dmp

    Filesize

    1.7MB

  • memory/1964-30-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2024-33-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2024-53-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2024-36-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2024-32-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2024-37-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2684-38-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2684-40-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2684-39-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2684-43-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2816-58-0x00000000335F0000-0x0000000033609000-memory.dmp

    Filesize

    100KB

  • memory/2816-64-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2816-20-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2816-55-0x00000000335F0000-0x0000000033609000-memory.dmp

    Filesize

    100KB

  • memory/2816-21-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2816-59-0x00000000335F0000-0x0000000033609000-memory.dmp

    Filesize

    100KB

  • memory/2816-61-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2816-52-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2816-18-0x0000000077740000-0x00000000778E9000-memory.dmp

    Filesize

    1.7MB

  • memory/2816-68-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2816-71-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2816-73-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2816-76-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2816-80-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2816-82-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB

  • memory/2816-85-0x0000000000480000-0x00000000014E2000-memory.dmp

    Filesize

    16.4MB