Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20250207-en
  • resource tags

    arch:x64arch:x86image:win7-20250207-enlocale:en-usos:windows7-x64system
  • submitted
    12-02-2025 08:37

General

  • Target

    PAYMENT_ADVICE_0020112025-02414291420913672819036-54882093562512209.exe

  • Size

    855KB

  • MD5

    0bca5053e588b923a819758a40d15fcf

  • SHA1

    3ced9b60e382958d810022d5aa7101b828dfd8a5

  • SHA256

    59146210128ee1a74ca1eb304bb156d7c83b3c85f3bc95a861fdb8ad2c885b3b

  • SHA512

    51a39f3cdfe1909979162fac0ce6051239004cae07dd229462bb65bf7fe84f579c0cddffa828a8c533ef468b3c183fc19a4dfc4781d674503be228f609f4b8cf

  • SSDEEP

    24576:vpwwZ9hDcP30jmiX0ZoDTRgrLTr8436/V4uVtCNOyO:Rx91cv0rOlrLTzK/VSOyO

Malware Config

Extracted

Family

remcos

Botnet

chima

C2

198.135.50.224:53648

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-512LV7

  • 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
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • NSIS installer 2 IoCs
  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PAYMENT_ADVICE_0020112025-02414291420913672819036-54882093562512209.exe
    "C:\Users\Admin\AppData\Local\Temp\PAYMENT_ADVICE_0020112025-02414291420913672819036-54882093562512209.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:2384
    • C:\Users\Admin\AppData\Local\Temp\PAYMENT_ADVICE_0020112025-02414291420913672819036-54882093562512209.exe
      "C:\Users\Admin\AppData\Local\Temp\PAYMENT_ADVICE_0020112025-02414291420913672819036-54882093562512209.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      • Modifies system certificate store
      • Suspicious use of SetWindowsHookEx
      PID:2164

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    22908a7645d2bac94f212f113caffd64

    SHA1

    ee3e91ecba60fe6befe4d979e095c3acdf901859

    SHA256

    b68a8d2ce3e18c66621c5ecee258f5638d0a24dad10992bf4f9728e9fd4820ed

    SHA512

    3de2f8f6482c90192531ebad1fcd72e7facdfe3d00d96a616f064ce014fa46f609c2a43bc5a47d14aa876f6546e855aefb69ad547834db64690a51fa97e923dc

  • C:\Users\Admin\AppData\Local\Temp\Cab29E0.tmp

    Filesize

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

  • C:\Users\Admin\AppData\Local\Temp\Tar2E27.tmp

    Filesize

    181KB

    MD5

    4ea6026cf93ec6338144661bf1202cd1

    SHA1

    a1dec9044f750ad887935a01430bf49322fbdcb7

    SHA256

    8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

    SHA512

    6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

  • C:\Users\Admin\AppData\Local\Temp\soothingness\Maaneskinsarbejdets.exe

    Filesize

    855KB

    MD5

    0bca5053e588b923a819758a40d15fcf

    SHA1

    3ced9b60e382958d810022d5aa7101b828dfd8a5

    SHA256

    59146210128ee1a74ca1eb304bb156d7c83b3c85f3bc95a861fdb8ad2c885b3b

    SHA512

    51a39f3cdfe1909979162fac0ce6051239004cae07dd229462bb65bf7fe84f579c0cddffa828a8c533ef468b3c183fc19a4dfc4781d674503be228f609f4b8cf

  • \Users\Admin\AppData\Local\Temp\nsoBF3C.tmp\System.dll

    Filesize

    11KB

    MD5

    b8992e497d57001ddf100f9c397fcef5

    SHA1

    e26ddf101a2ec5027975d2909306457c6f61cfbd

    SHA256

    98bcd1dd88642f4dd36a300c76ebb1ddfbbbc5bfc7e3b6d7435dc6d6e030c13b

    SHA512

    8823b1904dccfaf031068102cb1def7958a057f49ff369f0e061f1b4db2090021aa620bb8442a2a6ac9355bb74ee54371dc2599c20dc723755a46ede81533a3c

  • memory/2164-73-0x00000000014C0000-0x0000000005577000-memory.dmp

    Filesize

    64.7MB

  • memory/2164-77-0x0000000000450000-0x00000000014B2000-memory.dmp

    Filesize

    16.4MB

  • memory/2164-23-0x0000000077B40000-0x0000000077CE9000-memory.dmp

    Filesize

    1.7MB

  • memory/2164-22-0x00000000014C0000-0x0000000005577000-memory.dmp

    Filesize

    64.7MB

  • memory/2164-69-0x0000000000450000-0x00000000014B2000-memory.dmp

    Filesize

    16.4MB

  • memory/2164-97-0x0000000000450000-0x00000000014B2000-memory.dmp

    Filesize

    16.4MB

  • memory/2164-75-0x0000000000450000-0x00000000014B2000-memory.dmp

    Filesize

    16.4MB

  • memory/2164-26-0x0000000000450000-0x00000000014B2000-memory.dmp

    Filesize

    16.4MB

  • memory/2164-81-0x0000000000450000-0x00000000014B2000-memory.dmp

    Filesize

    16.4MB

  • memory/2164-93-0x0000000000450000-0x00000000014B2000-memory.dmp

    Filesize

    16.4MB

  • memory/2164-84-0x0000000000450000-0x00000000014B2000-memory.dmp

    Filesize

    16.4MB

  • memory/2164-87-0x0000000000450000-0x00000000014B2000-memory.dmp

    Filesize

    16.4MB

  • memory/2164-90-0x0000000000450000-0x00000000014B2000-memory.dmp

    Filesize

    16.4MB

  • memory/2384-20-0x0000000077B41000-0x0000000077C42000-memory.dmp

    Filesize

    1.0MB

  • memory/2384-21-0x0000000077B40000-0x0000000077CE9000-memory.dmp

    Filesize

    1.7MB