Analysis

  • max time kernel
    186s
  • max time network
    192s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    27-11-2022 19:24

General

  • Target

    41231403c901ea25abd1132ec834bc3dc5904c29c5afa8ad3f55c019e68059d8.rtf

  • Size

    24KB

  • MD5

    c08cbce6ebc4e840a187c6f1fe352a53

  • SHA1

    04292199f7cf5dcdfc4b3be7dcd6718d4bb030a3

  • SHA256

    41231403c901ea25abd1132ec834bc3dc5904c29c5afa8ad3f55c019e68059d8

  • SHA512

    e0a5832212119f3aaa8fb7ca61715286859956c808e3f74deeaade99c996db4908c2a88f0dbde1f5a74d90c70ba3cd2cc1d2ac02f5794f47f833efadfd2979c6

  • SSDEEP

    384:gQMmdOFNYY0aaaIswqPeOrka1+fHQJ+t3rQkRhZwkBmI/FNiKsuguwAJRr:8Fx0XaIsnPRIa4fwJMJgI/iogA5

Score
10/10

Malware Config

Extracted

Family

remcos

Botnet

BALLER

C2

91.192.100.48:1979

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-2RPM8Z

  • 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.

  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\41231403c901ea25abd1132ec834bc3dc5904c29c5afa8ad3f55c019e68059d8.rtf"
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:2012
  • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
    "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
    1⤵
    • Blocklisted process makes network request
    • Loads dropped DLL
    • Launches Equation Editor
    • Suspicious use of WriteProcessMemory
    PID:460
    • C:\Users\Admin\AppData\Roaming\maywealath7896523.exe
      "C:\Users\Admin\AppData\Roaming\maywealath7896523.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:956
      • C:\Users\Admin\AppData\Roaming\maywealath7896523.exe
        "C:\Users\Admin\AppData\Roaming\maywealath7896523.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetWindowsHookEx
        PID:1060

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Exploitation for Client Execution

1
T1203

Defense Evasion

Modify Registry

1
T1112

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Roaming\maywealath7896523.exe
    Filesize

    963KB

    MD5

    2122e1c4038121c8ea09f33b41ae6d6d

    SHA1

    25f7a871a2dd5dc467506930540ed0434186a70e

    SHA256

    1947863812af6b9eca6522bc8488573763b86a81b85bfbbe8039c7d89c65dbdd

    SHA512

    1fde11b506b8d3d76ceb091d59a46d9861f5fec44462f77f66d1b6f2393cd3fd9e03a11565b62de33f3eedfb2b373933d6b18f98f0c29f9c25436f529679d2a6

  • C:\Users\Admin\AppData\Roaming\maywealath7896523.exe
    Filesize

    963KB

    MD5

    2122e1c4038121c8ea09f33b41ae6d6d

    SHA1

    25f7a871a2dd5dc467506930540ed0434186a70e

    SHA256

    1947863812af6b9eca6522bc8488573763b86a81b85bfbbe8039c7d89c65dbdd

    SHA512

    1fde11b506b8d3d76ceb091d59a46d9861f5fec44462f77f66d1b6f2393cd3fd9e03a11565b62de33f3eedfb2b373933d6b18f98f0c29f9c25436f529679d2a6

  • C:\Users\Admin\AppData\Roaming\maywealath7896523.exe
    Filesize

    963KB

    MD5

    2122e1c4038121c8ea09f33b41ae6d6d

    SHA1

    25f7a871a2dd5dc467506930540ed0434186a70e

    SHA256

    1947863812af6b9eca6522bc8488573763b86a81b85bfbbe8039c7d89c65dbdd

    SHA512

    1fde11b506b8d3d76ceb091d59a46d9861f5fec44462f77f66d1b6f2393cd3fd9e03a11565b62de33f3eedfb2b373933d6b18f98f0c29f9c25436f529679d2a6

  • \Users\Admin\AppData\Roaming\maywealath7896523.exe
    Filesize

    963KB

    MD5

    2122e1c4038121c8ea09f33b41ae6d6d

    SHA1

    25f7a871a2dd5dc467506930540ed0434186a70e

    SHA256

    1947863812af6b9eca6522bc8488573763b86a81b85bfbbe8039c7d89c65dbdd

    SHA512

    1fde11b506b8d3d76ceb091d59a46d9861f5fec44462f77f66d1b6f2393cd3fd9e03a11565b62de33f3eedfb2b373933d6b18f98f0c29f9c25436f529679d2a6

  • \Users\Admin\AppData\Roaming\maywealath7896523.exe
    Filesize

    963KB

    MD5

    2122e1c4038121c8ea09f33b41ae6d6d

    SHA1

    25f7a871a2dd5dc467506930540ed0434186a70e

    SHA256

    1947863812af6b9eca6522bc8488573763b86a81b85bfbbe8039c7d89c65dbdd

    SHA512

    1fde11b506b8d3d76ceb091d59a46d9861f5fec44462f77f66d1b6f2393cd3fd9e03a11565b62de33f3eedfb2b373933d6b18f98f0c29f9c25436f529679d2a6

  • memory/956-72-0x0000000005D90000-0x0000000005E42000-memory.dmp
    Filesize

    712KB

  • memory/956-66-0x00000000013D0000-0x00000000014C8000-memory.dmp
    Filesize

    992KB

  • memory/956-63-0x0000000000000000-mapping.dmp
  • memory/956-73-0x0000000005FC0000-0x000000000603C000-memory.dmp
    Filesize

    496KB

  • memory/956-71-0x0000000000270000-0x000000000027C000-memory.dmp
    Filesize

    48KB

  • memory/956-68-0x0000000000250000-0x0000000000268000-memory.dmp
    Filesize

    96KB

  • memory/1060-74-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/1060-82-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/1060-93-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/1060-92-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/1060-91-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/1060-87-0x0000000000431C27-mapping.dmp
  • memory/1060-86-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/1060-84-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/1060-75-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/1060-77-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/1060-79-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/1060-80-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/1060-81-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/2012-58-0x0000000075C41000-0x0000000075C43000-memory.dmp
    Filesize

    8KB

  • memory/2012-60-0x000000007183D000-0x0000000071848000-memory.dmp
    Filesize

    44KB

  • memory/2012-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/2012-55-0x0000000070851000-0x0000000070853000-memory.dmp
    Filesize

    8KB

  • memory/2012-54-0x0000000072DD1000-0x0000000072DD4000-memory.dmp
    Filesize

    12KB

  • memory/2012-57-0x000000007183D000-0x0000000071848000-memory.dmp
    Filesize

    44KB

  • memory/2012-70-0x000000007183D000-0x0000000071848000-memory.dmp
    Filesize

    44KB

  • memory/2012-69-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB