Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/05/2023, 06:40

General

  • Target

    REHM0987656700.jar

  • Size

    692KB

  • MD5

    b71624aadb02108cdcd82a52fcaddc5a

  • SHA1

    da6275f2c13b5dec593e033e213d57309e09080a

  • SHA256

    fd5a7007699ad2361e69dfad9fc1351ea8405d3d71b7bd6332f455d11986fd2b

  • SHA512

    4b20f0850ed2f517d384110969776f7d21274bfc58da557f669fbd0c640d101118534c41eb1264bab45840d16dea4f86d256859fdb212c68e176012303468dfc

  • SSDEEP

    12288:bj/GJI7rQ9a0qhMFqEL3TLVGUBiy2wARvX9D1a+hMFqEL3TLVGUBiy2wARvX9D1W:fG6KyhMFqEUny21RvNDc+hMFqEUny21w

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

208.67.107.123:8780

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-CL3TZF

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 2 IoCs
  • UPX packed file 55 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

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

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

  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\ProgramData\Oracle\Java\javapath\java.exe
    java -jar C:\Users\Admin\AppData\Local\Temp\REHM0987656700.jar
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3636
    • C:\Users\Admin\fEYW.exe
      C:\Users\Admin\fEYW.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:3980
      • C:\Users\Admin\fEYW.exe
        "C:\Users\Admin\fEYW.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetWindowsHookEx
        PID:2792
    • C:\Users\Admin\Fd0THmyJKXBF.exe
      "C:\Users\Admin\Fd0THmyJKXBF.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:3444
      • C:\Users\Admin\Fd0THmyJKXBF.exe
        "C:\Users\Admin\Fd0THmyJKXBF.exe"
        3⤵
        • Executes dropped EXE
        PID:1148

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    a50f9ddc2449c42a2b5714db404493fe

    SHA1

    cfe45ab1538ac5b9d7592c7d5b85203ba15313e1

    SHA256

    942d3c535d69171a76fc71f481d658636977524a80ff13c114f29f9799e011e4

    SHA512

    78d91f9551de0bfea794fe89624d401e1547cee086a48ecbb83ea18c76b2927a16c306774e29e24a0254d23fdfa8959a1394a502b98001aaa5ec0de3f018d56b

  • C:\Users\Admin\AppData\Local\Temp\nhnqdlpuhg.n

    Filesize

    250KB

    MD5

    8a9b1f789ee27e4b429c164ff4b1af06

    SHA1

    2c1f029a5722d310175e8c773e8e1ff816f6c10d

    SHA256

    bc7a16698b23ce3d03ee43bab193afed19c72c30e2fca979ce33f1c30ab4c9bf

    SHA512

    961c7a87d8212d89235bde930b3d370c5ca35c9a5a5a2b4d6363daf2e0b01684b6e1db4d5cf141dd9c23e0abaca3bcf8db1968dd2a9d310e21f3b215897a417b

  • C:\Users\Admin\AppData\Local\Temp\nsaBC90.tmp\rjmhtwjslr.dll

    Filesize

    4KB

    MD5

    87f91f528b14259a5b278cead56e1a8d

    SHA1

    1fd83b5e040583c85979ed79b72562e320877525

    SHA256

    87ebb05472d47604e9f3b4adae68164249750cd8dd4ec1b47a6a7f480b7668df

    SHA512

    752f8e5efda57e3af6b782d65115b32d8b09ffc76532fad069e52bf71af95f71faa32703d398b7ca9d5e04796ee19e53db186f4c828f5f2b55d78d75892dcb34

  • C:\Users\Admin\AppData\Local\Temp\nsaBC90.tmp\rjmhtwjslr.dll

    Filesize

    4KB

    MD5

    87f91f528b14259a5b278cead56e1a8d

    SHA1

    1fd83b5e040583c85979ed79b72562e320877525

    SHA256

    87ebb05472d47604e9f3b4adae68164249750cd8dd4ec1b47a6a7f480b7668df

    SHA512

    752f8e5efda57e3af6b782d65115b32d8b09ffc76532fad069e52bf71af95f71faa32703d398b7ca9d5e04796ee19e53db186f4c828f5f2b55d78d75892dcb34

  • C:\Users\Admin\AppData\Local\Temp\nslBC81.tmp\rjmhtwjslr.dll

    Filesize

    4KB

    MD5

    87f91f528b14259a5b278cead56e1a8d

    SHA1

    1fd83b5e040583c85979ed79b72562e320877525

    SHA256

    87ebb05472d47604e9f3b4adae68164249750cd8dd4ec1b47a6a7f480b7668df

    SHA512

    752f8e5efda57e3af6b782d65115b32d8b09ffc76532fad069e52bf71af95f71faa32703d398b7ca9d5e04796ee19e53db186f4c828f5f2b55d78d75892dcb34

  • C:\Users\Admin\AppData\Local\Temp\vyqlmgtkwct.q

    Filesize

    8KB

    MD5

    f40a61da40e7e4a38a668290b3535215

    SHA1

    73d99683a89efc8b520da3c39936dfd1fd7aa3cc

    SHA256

    a436ed09634ca54e8b9b873d92de1e2761e7529d9e42f2a5c414d5dd01a52fb9

    SHA512

    c8e6e3bd84bb8984e7d19be4abf901edcbe5ad167dcc1139aa03c2d67e68a1460d3dfba17136660ec84235d08722b2a62da94308f9a41244b1784340062cd929

  • C:\Users\Admin\Fd0THmyJKXBF.exe

    Filesize

    286KB

    MD5

    21d7e6a7507b8efc37c796ef12068046

    SHA1

    420287e3f99daa9c250c2bdf0649e1a692f95fbe

    SHA256

    3b1e9fdaa4498632c2bba540bfd00bb27a5301cd53eb7d298169c6a80beec3d8

    SHA512

    fea7b0674596f4915bacfccfd838bd0adf949e634e83bd38ecdbb99269b6925f881e4e7b4421c579be8dafc98e955e5320469d63f0d43dc8ac3b8a3c88cea4f6

  • C:\Users\Admin\Fd0THmyJKXBF.exe

    Filesize

    286KB

    MD5

    21d7e6a7507b8efc37c796ef12068046

    SHA1

    420287e3f99daa9c250c2bdf0649e1a692f95fbe

    SHA256

    3b1e9fdaa4498632c2bba540bfd00bb27a5301cd53eb7d298169c6a80beec3d8

    SHA512

    fea7b0674596f4915bacfccfd838bd0adf949e634e83bd38ecdbb99269b6925f881e4e7b4421c579be8dafc98e955e5320469d63f0d43dc8ac3b8a3c88cea4f6

  • C:\Users\Admin\Fd0THmyJKXBF.exe

    Filesize

    286KB

    MD5

    21d7e6a7507b8efc37c796ef12068046

    SHA1

    420287e3f99daa9c250c2bdf0649e1a692f95fbe

    SHA256

    3b1e9fdaa4498632c2bba540bfd00bb27a5301cd53eb7d298169c6a80beec3d8

    SHA512

    fea7b0674596f4915bacfccfd838bd0adf949e634e83bd38ecdbb99269b6925f881e4e7b4421c579be8dafc98e955e5320469d63f0d43dc8ac3b8a3c88cea4f6

  • C:\Users\Admin\Fd0THmyJKXBF.exe

    Filesize

    286KB

    MD5

    21d7e6a7507b8efc37c796ef12068046

    SHA1

    420287e3f99daa9c250c2bdf0649e1a692f95fbe

    SHA256

    3b1e9fdaa4498632c2bba540bfd00bb27a5301cd53eb7d298169c6a80beec3d8

    SHA512

    fea7b0674596f4915bacfccfd838bd0adf949e634e83bd38ecdbb99269b6925f881e4e7b4421c579be8dafc98e955e5320469d63f0d43dc8ac3b8a3c88cea4f6

  • C:\Users\Admin\fEYW.exe

    Filesize

    286KB

    MD5

    21d7e6a7507b8efc37c796ef12068046

    SHA1

    420287e3f99daa9c250c2bdf0649e1a692f95fbe

    SHA256

    3b1e9fdaa4498632c2bba540bfd00bb27a5301cd53eb7d298169c6a80beec3d8

    SHA512

    fea7b0674596f4915bacfccfd838bd0adf949e634e83bd38ecdbb99269b6925f881e4e7b4421c579be8dafc98e955e5320469d63f0d43dc8ac3b8a3c88cea4f6

  • C:\Users\Admin\fEYW.exe

    Filesize

    286KB

    MD5

    21d7e6a7507b8efc37c796ef12068046

    SHA1

    420287e3f99daa9c250c2bdf0649e1a692f95fbe

    SHA256

    3b1e9fdaa4498632c2bba540bfd00bb27a5301cd53eb7d298169c6a80beec3d8

    SHA512

    fea7b0674596f4915bacfccfd838bd0adf949e634e83bd38ecdbb99269b6925f881e4e7b4421c579be8dafc98e955e5320469d63f0d43dc8ac3b8a3c88cea4f6

  • C:\Users\Admin\fEYW.exe

    Filesize

    286KB

    MD5

    21d7e6a7507b8efc37c796ef12068046

    SHA1

    420287e3f99daa9c250c2bdf0649e1a692f95fbe

    SHA256

    3b1e9fdaa4498632c2bba540bfd00bb27a5301cd53eb7d298169c6a80beec3d8

    SHA512

    fea7b0674596f4915bacfccfd838bd0adf949e634e83bd38ecdbb99269b6925f881e4e7b4421c579be8dafc98e955e5320469d63f0d43dc8ac3b8a3c88cea4f6

  • memory/1148-211-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-233-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-241-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-200-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-205-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-207-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-209-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-276-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-214-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-215-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-275-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-217-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-218-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-219-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-220-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-222-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-223-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-224-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-226-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-227-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-229-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-230-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-232-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-274-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-234-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-235-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-237-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-238-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-239-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-196-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-272-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-242-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-243-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-244-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-246-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-247-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-248-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-249-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-251-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-252-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-253-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-255-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-256-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-257-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-258-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-260-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-261-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-262-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-263-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-265-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-266-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-267-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-269-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-270-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/2792-271-0x0000000000400000-0x0000000000488000-memory.dmp

    Filesize

    544KB

  • memory/3636-147-0x0000000002A90000-0x0000000002A91000-memory.dmp

    Filesize

    4KB

  • memory/3636-216-0x0000000002A90000-0x0000000002A91000-memory.dmp

    Filesize

    4KB

  • memory/3636-195-0x0000000002A90000-0x0000000002A91000-memory.dmp

    Filesize

    4KB

  • memory/3980-202-0x0000000003130000-0x0000000003133000-memory.dmp

    Filesize

    12KB