Analysis

  • max time kernel
    109s
  • max time network
    110s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/09/2024, 17:48

General

  • Target
    doc_0300304032000.JPG.exe
  • Size 1.2MB
  • Sample240903-wdyb6stdkf
  • SHA256 a6ba56520ba01fe4dd295f81ddbec6d90df6e80ea4a50fd79895a82a0b14b3e9
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • AQUAFINA

C2
  • december2n.duckdns.org:6241

  • december2nd.ddns.net:6241

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-5TYRFW

  • 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.

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

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

  • Gathers network information 2 TTPs 2 IoCs

    Uses commandline utility to view network configuration.

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\doc_0300304032000.JPG.exe
    "C:\Users\Admin\AppData\Local\Temp\doc_0300304032000.JPG.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2640
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\RarSFX0\iril.vbe"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4000
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c ipconfig /release
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1460
        • C:\Windows\SysWOW64\ipconfig.exe
          ipconfig /release
          4⤵
          • System Location Discovery: System Language Discovery
          • Gathers network information
          PID:1328
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c nboiwrfl.bmp nxaoo.xl
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3112
        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\nboiwrfl.bmp
          nboiwrfl.bmp nxaoo.xl
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:3296
          • C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
            "C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe"
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            PID:4572
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c ipconfig /renew
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4552
        • C:\Windows\SysWOW64\ipconfig.exe
          ipconfig /renew
          4⤵
          • System Location Discovery: System Language Discovery
          • Gathers network information
          PID:3152

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        asrpliq.xls

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\asrpliq.xls
        • Size 552B
        • SHA256 854bd78e60f8bd7579bd81667bb267430370dc63dd2d8007b9ae5723e4d1652f
        • MD5 SHA1 SHA512

        bphjeptxx.mp3

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\bphjeptxx.mp3
        • Size 557B
        • SHA256 9f597408131990b8ef1e654ff6e2bb92633220d8421cb1ba07a2d333a3139e05
        • MD5 SHA1 SHA512

        brkacwg.docx

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\brkacwg.docx
        • Size 524B
        • SHA256 b07f68cb16d9347b6f0ef65c8e987eeb155e012510431fe926546bee32462999
        • MD5 SHA1 SHA512

        eihojl.icm

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\eihojl.icm
        • Size 36KB
        • SHA256 a426b8d5776d0960f2ad9759c665568d42c048768b241674aaafe2fbee73b291
        • MD5 SHA1 SHA512 SSDEEP

        eihojl.icm

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\eihojl.icm
        • Size 36KB
        • SHA256 e9aeb14a428d61de627a3c4d512e552bc655abf9140b42a8aedcc953b66757bf
        • MD5 SHA1 SHA512 SSDEEP

        gfom.dll

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\gfom.dll
        • Size 574B
        • SHA256 f24a223d2747910690768238e8f924af48f99d250a804a32a3f7c4e5e8687ea0
        • MD5 SHA1 SHA512

        hckntns.bmp

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\hckntns.bmp
        • Size 616B
        • SHA256 bf5635dd55476f18acde23cf4207b84d674c7bb3642e4b88848e393cc8f5442b
        • MD5 SHA1 SHA512

        ijswgr.txt

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\ijswgr.txt
        • Size 594B
        • SHA256 aa06f47b4ed95ec47964f390e72e85b1fffde74a52de1ee4c44a78fbc787768a
        • MD5 SHA1 SHA512

        iril.vbe

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\iril.vbe
        • Size 72KB
        • SHA256 c2b3f1bc4d1542ce4077c2e85b9c4e36f4ca18842ceff272d5731ac832ac738e
        • MD5 SHA1 SHA512 SSDEEP

        jrflbrgk.exe

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\jrflbrgk.exe
        • Size 539B
        • SHA256 b07359ef1e44f475052a669a47250795f3dd5132f598757f53b27b9edfbabb64
        • MD5 SHA1 SHA512

        jxiopctd.ppt

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\jxiopctd.ppt
        • Size 534B
        • SHA256 57126479323bf2baf0a675d89062d4398f685cca06c1a8db364de274769d9399
        • MD5 SHA1 SHA512

        krrlpuvelc.ppt

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\krrlpuvelc.ppt
        • Size 521B
        • SHA256 29b0d5701cc6d0bd68799504590652be46f7c42ae5f2da4ef205ca3b4ccc3ae4
        • MD5 SHA1 SHA512

        lole.mp3

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\lole.mp3
        • Size 666B
        • SHA256 c0a58c137e3c79911d4638a2aaddd84cd304935673b56f3e88ac525cde14b597
        • MD5 SHA1 SHA512

        lumxlh.jpg

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\lumxlh.jpg
        • Size 565B
        • SHA256 80e4e6bc204de150776dd281048deac73414866dc7ddcf06b33d73f9a92ccd41
        • MD5 SHA1 SHA512

        mllpbspwuh.3gp

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\mllpbspwuh.3gp
        • Size 501B
        • SHA256 973f3a4854983ce0d5106153c28ac28b6e35c3a2ddaed0273804ca470d6bf277
        • MD5 SHA1 SHA512

        nboiwrfl.bmp

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\nboiwrfl.bmp
        • Size 872KB
        • SHA256 237d1bca6e056df5bb16a1216a434634109478f882d3b1d58344c801d184f95d
        • MD5 SHA1 SHA512 SSDEEP

        phvetqso.dat

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\phvetqso.dat
        • Size 608B
        • SHA256 f47407d1f1663f30b1d29687993a43c9c3282e6bc5948117af1597341e1b1558
        • MD5 SHA1 SHA512

        qcfdfhil.ppt

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\qcfdfhil.ppt
        • Size 690B
        • SHA256 7b344bd6a71cae61b00a812e1cd40f3e92b8e9f3f7e809f1c0d0bf44fea5783f
        • MD5 SHA1 SHA512

        rseq.icm

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\rseq.icm
        • Size 572B
        • SHA256 ee9e4ae97648fa520fc7d76bc319b123de81f1c4f91c487dac6812a01ed3ea66
        • MD5 SHA1 SHA512

        rtlrhqqjui.exe

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\rtlrhqqjui.exe
        • Size 644B
        • SHA256 b13d84ccffced4d226adbd5b460a33efe4883da6019773ee0c8d26fedb121cc3
        • MD5 SHA1 SHA512

        tjvpsq.dat

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\tjvpsq.dat
        • Size 542B
        • SHA256 5cfda41920e88b0204fa333889e0facc637bed480825e4a00297c809687455b5
        • MD5 SHA1 SHA512

        ugkfobbc.mp2

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\ugkfobbc.mp2
        • Size 540B
        • SHA256 670b1c86f52079acefa5130aa263b993b71ebc9d18518344c9a85b8505768788
        • MD5 SHA1 SHA512

        uvswbok.mp3

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\uvswbok.mp3
        • Size 548B
        • SHA256 a51c53cd2644b7556f5a77bce39cccb33b82c64ce5976a49e2053e06146a7e77
        • MD5 SHA1 SHA512

        vlduqvd.mp3

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\vlduqvd.mp3
        • Size 583B
        • SHA256 0105542f1c237d9a8efa6cd0c7cfd93ab77503a1ce59863d054a3e7b02df7752
        • MD5 SHA1 SHA512

        wcns.xls

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\wcns.xls
        • Size 615B
        • SHA256 aa462d1c7a0850e42d784f6c78490af7d1645dd270ccc42fdbdfec50b34fb960
        • MD5 SHA1 SHA512

        xaqbvlq.msc

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\xaqbvlq.msc
        • Size 560B
        • SHA256 9c3553caa8eb85b49ee504bdc249e0237662e93080c5fd09b896399cb1df0fea
        • MD5 SHA1 SHA512

        xdsqkk.xsa

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\xdsqkk.xsa
        • Size 883KB
        • SHA256 194620122b41ed3a5228b708431b983a4e00a488dc104bc43358c8bb07bfd9b1
        • MD5 SHA1 SHA512 SSDEEP

        RegSvcs.exe

        • Path C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
        • Size 44KB
        • SHA256 2c1eeb7097023c784c2bd040a2005a5070ed6f3a4abf13929377a9e39fab1390
        • MD5 SHA1 SHA512 SSDEEP

        memory/4572-176-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-192-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-161-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-162-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-163-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-164-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-166-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-167-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-168-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-169-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-170-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-171-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-172-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-173-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-174-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-175-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-158-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-177-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-178-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-179-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-180-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-181-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-183-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-184-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-185-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-186-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-187-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-188-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-189-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-190-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-191-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-160-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-193-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-194-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-195-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-196-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-197-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-198-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-199-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-200-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-201-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-202-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-203-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-204-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-205-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-206-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-207-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-208-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-209-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-210-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-211-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-212-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-213-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-214-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-215-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-216-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-217-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-218-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-219-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-220-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-221-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-222-0x0000000000900000-0x0000000001900000-memory.dmp

        memory/4572-223-0x0000000000900000-0x0000000001900000-memory.dmp