Analysis

  • max time kernel
    157s
  • max time network
    164s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    29-11-2023 12:40

General

  • Target

    tmp.exe

  • Size

    2.3MB

  • MD5

    f27149642f210c6682b580c09c427871

  • SHA1

    ef5bd96f33496b8843eecbbe474ffe55a4fc8b95

  • SHA256

    36d8435b15b027b6fce23ff563cbba9661fb04f8c3a2404b10e7e2c37700dd19

  • SHA512

    e715b95a3f33a42f184f63c9f3f225d207c03912a2ab4c99e6228e17c00ab5aced10b55f859ee7acbe23f78cbe315df4014f8595890e2b9dba622a968375077d

  • SSDEEP

    49152:UkQzWGa8pH8yc0/wU2lpe63ZrxKrVEbRIqiPt41FFehg1mQ5C:UNqGa8pcyV/wjpdZrxEVEtI141qn

Malware Config

Extracted

Family

remcos

Botnet

Crypted

C2

172.174.245.21:5400

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

    true

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    ouor.dat

  • keylog_flag

    false

  • keylog_path

    %UserProfile%

  • mouse_option

    false

  • mutex

    lilloere-UIQGT9

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • ModiLoader, DBatLoader

    ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.

  • Remcos

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

  • ModiLoader Second Stage 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Script User-Agent 1 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of WriteProcessMemory 45 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2244
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Public\Libraries\BiwnnmcpO.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2700
      • C:\Windows\SysWOW64\cmd.exe
        cmd.exe /c mkdir "\\?\C:\Windows "
        3⤵
          PID:2628
        • C:\Windows\SysWOW64\cmd.exe
          cmd.exe /c mkdir "\\?\C:\Windows \System32"
          3⤵
            PID:2612
          • C:\Windows\SysWOW64\cmd.exe
            cmd.exe /c ECHO F
            3⤵
              PID:1236
            • C:\Windows\SysWOW64\xcopy.exe
              xcopy "easinvoker.exe" "C:\Windows \System32\" /K /D /H /Y
              3⤵
              • Enumerates system info in registry
              PID:2760
            • C:\Windows\SysWOW64\cmd.exe
              cmd.exe /c ECHO F
              3⤵
                PID:2768
              • C:\Windows\SysWOW64\xcopy.exe
                xcopy "netutils.dll" "C:\Windows \System32\" /K /D /H /Y
                3⤵
                • Enumerates system info in registry
                PID:2756
              • C:\Windows\SysWOW64\cmd.exe
                cmd.exe /c ECHO F
                3⤵
                  PID:2708
                • C:\Windows\SysWOW64\xcopy.exe
                  xcopy "KDECO.bat" "C:\Windows \System32\" /K /D /H /Y
                  3⤵
                  • Enumerates system info in registry
                  PID:2752
                • C:\Windows \System32\easinvoker.exe
                  "C:\Windows \System32\easinvoker.exe"
                  3⤵
                  • Executes dropped EXE
                  PID:2512
                • C:\Windows \System32\easinvoker.exe
                  "C:\Windows \System32\easinvoker.exe"
                  3⤵
                  • Executes dropped EXE
                  PID:2508
                • C:\Windows\SysWOW64\PING.EXE
                  ping 127.0.0.1 -n 6
                  3⤵
                  • Runs ping.exe
                  PID:2396
              • C:\Windows\SysWOW64\colorcpl.exe
                C:\Windows\System32\colorcpl.exe
                2⤵
                  PID:856

              Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              • C:\Users\Public\Libraries\BiwnnmcpO.bat

                Filesize

                466B

                MD5

                9e80036aabe3227dbf98b3975051a53b

                SHA1

                9670aab8897770a93293d85426b7b13dda23a152

                SHA256

                964aab3b72b3545fabc58a209714ebeade739a0fec40b33af675d7157b9cb252

                SHA512

                107fb6b364cf92730aca1a044f7769a1f4aed39a72f031a5004ccf09b3bebabac5fc88b3d0f85eb64c665404136db13678718bad36bea4311f07726684ed0a03

              • C:\Users\Public\Libraries\BiwnnmcpO.bat

                Filesize

                466B

                MD5

                9e80036aabe3227dbf98b3975051a53b

                SHA1

                9670aab8897770a93293d85426b7b13dda23a152

                SHA256

                964aab3b72b3545fabc58a209714ebeade739a0fec40b33af675d7157b9cb252

                SHA512

                107fb6b364cf92730aca1a044f7769a1f4aed39a72f031a5004ccf09b3bebabac5fc88b3d0f85eb64c665404136db13678718bad36bea4311f07726684ed0a03

              • C:\Users\Public\Libraries\KDECO.bat

                Filesize

                152B

                MD5

                7e5fbd29557a68383dfb34e696964e93

                SHA1

                c1f748f89b47864301255d1fb2bfed04ed0d1300

                SHA256

                4e55b1bbe2e0e099592ac57a747fa8d4ef67409901d6c64323a1b73d50e5de67

                SHA512

                7dcb6582b03e7bf0cab2168dc775ca6d7a15ebb097fd2cdd3445b6d35ee128386fb9aa6a548b745c32540e358b2aa4d7c78a6f59f85c32065735fc54a6a2bb6a

              • C:\Users\Public\Libraries\easinvoker.exe

                Filesize

                128KB

                MD5

                231ce1e1d7d98b44371ffff407d68b59

                SHA1

                25510d0f6353dbf0c9f72fc880de7585e34b28ff

                SHA256

                30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96

                SHA512

                520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612

              • C:\Users\Public\Libraries\netutils.dll

                Filesize

                109KB

                MD5

                f3734dd95652252d02090c287c556522

                SHA1

                a9b9479f66516922a119eec78d3610342f22a68b

                SHA256

                be00f70763a053bf9c4b35e97319afbffa71dbb6e9c2c3c3f642a5e1fa7eb004

                SHA512

                59df477a29d38b8d5b5c4567c241d4ffe1d58926fa6775e1ecb15ec8119cf040be97f83870704b422f044ae56f2a5169c50b92a3e1b75a8069e2a251f9dec41b

              • C:\Windows \System32\easinvoker.exe

                Filesize

                128KB

                MD5

                231ce1e1d7d98b44371ffff407d68b59

                SHA1

                25510d0f6353dbf0c9f72fc880de7585e34b28ff

                SHA256

                30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96

                SHA512

                520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612

              • C:\Windows \System32\easinvoker.exe

                Filesize

                128KB

                MD5

                231ce1e1d7d98b44371ffff407d68b59

                SHA1

                25510d0f6353dbf0c9f72fc880de7585e34b28ff

                SHA256

                30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96

                SHA512

                520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612

              • C:\Windows \System32\easinvoker.exe

                Filesize

                128KB

                MD5

                231ce1e1d7d98b44371ffff407d68b59

                SHA1

                25510d0f6353dbf0c9f72fc880de7585e34b28ff

                SHA256

                30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96

                SHA512

                520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612

              • memory/856-56-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-64-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-79-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-78-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-77-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-76-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-54-0x0000000002D90000-0x0000000003D90000-memory.dmp

                Filesize

                16.0MB

              • memory/856-55-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-75-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-59-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-61-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-62-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-63-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-74-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-65-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-69-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-70-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-71-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-72-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/856-73-0x0000000001EA0000-0x0000000001F22000-memory.dmp

                Filesize

                520KB

              • memory/2244-5-0x0000000000400000-0x0000000000651000-memory.dmp

                Filesize

                2.3MB

              • memory/2244-0-0x0000000000220000-0x0000000000221000-memory.dmp

                Filesize

                4KB

              • memory/2244-1-0x00000000030C0000-0x00000000040C0000-memory.dmp

                Filesize

                16.0MB

              • memory/2244-2-0x00000000030C0000-0x00000000040C0000-memory.dmp

                Filesize

                16.0MB

              • memory/2244-4-0x0000000000220000-0x0000000000221000-memory.dmp

                Filesize

                4KB

              • memory/2700-46-0x0000000002200000-0x0000000002201000-memory.dmp

                Filesize

                4KB