Analysis

  • max time kernel
    137s
  • max time network
    158s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-02-2024 19:45

General

  • Target

    ORDER#4510093083_POs_NEW_MATERIAL_JAN_2024_POs_pdfs.exe

  • Size

    789KB

  • MD5

    e2889893d75c1ea7bd8982274873b1b8

  • SHA1

    9ebedbf8146b9862503bf3c40239e169b09c67a7

  • SHA256

    5a30a9b801943074fc132f20ab5f77cc2c2bd95ccd76a535b3ad7e8fcf6d1cdd

  • SHA512

    a5c2fa4c73b885dd51cb07a227eb709805ec2d50c20be4f97f363f27dc2dd5377d4da9f695cd075287c50a619823082624a5f01838ae6dc126d4c51a70eb1275

  • SSDEEP

    24576:hMwhWpdsQpT6q3tmxUgxDEuZ9WI+spi9iCnqV+:hMweskT6q30x4uZ8dr9q4

Malware Config

Extracted

Family

remcos

Botnet

2024

C2

72.11.158.94:1604

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    vexplorers.exe

  • copy_folder

    vexplorers

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-800RNZ

  • 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.

  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 6 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 5 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 6 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs
  • Suspicious use of SetThreadContext 7 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: MapViewOfSection 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ORDER#4510093083_POs_NEW_MATERIAL_JAN_2024_POs_pdfs.exe
    "C:\Users\Admin\AppData\Local\Temp\ORDER#4510093083_POs_NEW_MATERIAL_JAN_2024_POs_pdfs.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:180
    • C:\Users\Admin\AppData\Local\Temp\ORDER#4510093083_POs_NEW_MATERIAL_JAN_2024_POs_pdfs.exe
      "C:\Users\Admin\AppData\Local\Temp\ORDER#4510093083_POs_NEW_MATERIAL_JAN_2024_POs_pdfs.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of WriteProcessMemory
      PID:4484
      • C:\ProgramData\vexplorers\vexplorers.exe
        "C:\ProgramData\vexplorers\vexplorers.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious use of SetThreadContext
        • Drops file in Program Files directory
        • Drops file in Windows directory
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:4064
        • C:\ProgramData\vexplorers\vexplorers.exe
          "C:\ProgramData\vexplorers\vexplorers.exe"
          4⤵
          • Loads dropped DLL
          • Adds Run key to start application
          • Suspicious use of NtCreateThreadExHideFromDebugger
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • Suspicious use of SetThreadContext
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:4452
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe
            5⤵
              PID:5112
            • C:\ProgramData\vexplorers\vexplorers.exe
              C:\ProgramData\vexplorers\vexplorers.exe /stext "C:\Users\Admin\AppData\Local\Temp\xzqomfaipajlbbscmmucdetihxpxddv"
              5⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              PID:116
            • C:\ProgramData\vexplorers\vexplorers.exe
              C:\ProgramData\vexplorers\vexplorers.exe /stext "C:\Users\Admin\AppData\Local\Temp\audhmplkdibqmhogvxpeorozqmggeomsfj"
              5⤵
              • Executes dropped EXE
              • Accesses Microsoft Outlook accounts
              PID:4056
            • C:\ProgramData\vexplorers\vexplorers.exe
              C:\ProgramData\vexplorers\vexplorers.exe /stext "C:\Users\Admin\AppData\Local\Temp\kwirni"
              5⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1088
            • C:\Windows\SysWOW64\svchost.exe
              svchost.exe
              5⤵
                PID:3316
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 4452 -s 1464
                5⤵
                • Program crash
                PID:3812
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4452 -ip 4452
        1⤵
          PID:2552

        Network

        MITRE ATT&CK Matrix ATT&CK v13

        Persistence

        Boot or Logon Autostart Execution

        1
        T1547

        Registry Run Keys / Startup Folder

        1
        T1547.001

        Privilege Escalation

        Boot or Logon Autostart Execution

        1
        T1547

        Registry Run Keys / Startup Folder

        1
        T1547.001

        Defense Evasion

        Modify Registry

        1
        T1112

        Credential Access

        Unsecured Credentials

        1
        T1552

        Credentials In Files

        1
        T1552.001

        Discovery

        Query Registry

        1
        T1012

        System Information Discovery

        2
        T1082

        Collection

        Data from Local System

        1
        T1005

        Email Collection

        1
        T1114

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\vexplorers\vexplorers.exe
          Filesize

          789KB

          MD5

          e2889893d75c1ea7bd8982274873b1b8

          SHA1

          9ebedbf8146b9862503bf3c40239e169b09c67a7

          SHA256

          5a30a9b801943074fc132f20ab5f77cc2c2bd95ccd76a535b3ad7e8fcf6d1cdd

          SHA512

          a5c2fa4c73b885dd51cb07a227eb709805ec2d50c20be4f97f363f27dc2dd5377d4da9f695cd075287c50a619823082624a5f01838ae6dc126d4c51a70eb1275

        • C:\Users\Admin\AppData\Local\Petals\Retrousse\Whiffletrees\Elitedivisionen\Fortolde.Xyl
          Filesize

          227KB

          MD5

          934a13585e8f3caa531f139bfbcc1db2

          SHA1

          faccc849e76d81ff45f5660efcbc755c261ff2bf

          SHA256

          98b761f80f1aa385782662756b112087a9a800577f643b50a114a187fd4f6f55

          SHA512

          b5d52a6a6c8427041813c8336607ff3707a5e707a99d87d4cd058864d1161762bf44f136b3878967ebdf0eea7b09b73beb1081965431c403eda979968930c359

        • C:\Users\Admin\AppData\Local\Temp\Beleaguering\Opkogs.exe
          Filesize

          789KB

          MD5

          dec4253bf436c01e2fd66353a3ebe3e2

          SHA1

          04fb085611fa43af3e4683bf46d1f0fb35da98a4

          SHA256

          7ce6d64fdef2d053b7ec18a28ac710ab19f815f6b2e84acf49514c2859325039

          SHA512

          55b8484005880e3ada8412a83ca66f40f33ac8e312a00c2d6c7555055b46653233e133c74841a983a900c1085f1b69dcb3fd8881d7016714686a9b6292edcd32

        • C:\Users\Admin\AppData\Local\Temp\nswE1F5.tmp\System.dll
          Filesize

          12KB

          MD5

          564bb0373067e1785cba7e4c24aab4bf

          SHA1

          7c9416a01d821b10b2eef97b80899d24014d6fc1

          SHA256

          7a9ddee34562cd3703f1502b5c70e99cd5bba15de2b6845a3555033d7f6cb2a5

          SHA512

          22c61a323cb9293d7ec5c7e7e60674d0e2f7b29d55be25eb3c128ea2cd7440a1400cee17c43896b996278007c0d247f331a9b8964e3a40a0eb1404a9596c4472

        • C:\Users\Admin\AppData\Local\Temp\xzqomfaipajlbbscmmucdetihxpxddv
          Filesize

          4KB

          MD5

          320830fb2990210b35d02eb559f1b3f2

          SHA1

          fba985836640a92e69c58c643929b75f7635ee33

          SHA256

          155c37d976ae56d6d9d7bed09e2802dade565be58b8af769b1e815ceb044c318

          SHA512

          6e0536d68bc7f2c053a02879aaabeabb390913028f5986be4d2c3eee67db27f1c9bf1675e33ef28bad5afb7c542070cdae31b31a1493328dc6e36c23a78a9073

        • C:\Windows\Fonts\snlig.ini
          Filesize

          43B

          MD5

          75285908e15263897f2fe77cc637ef6e

          SHA1

          cc5a707cae259834b2453a305af9453b7b7412ac

          SHA256

          6fc175d4186cfb67d46e22b277602aa3ec665ad44c9854e7bdaf0e5a25cefbc5

          SHA512

          e93afaa0772d9aa9a8d77e44473a5c58cf9f3b214b76d5ed94e08dbc2ae9ef3d67b470073b83c157318bfa67fb44e17833af313efe8ded28e07d55272eb4edb2

        • memory/116-78-0x0000000000400000-0x0000000000478000-memory.dmp
          Filesize

          480KB

        • memory/116-73-0x0000000000400000-0x0000000000478000-memory.dmp
          Filesize

          480KB

        • memory/116-66-0x0000000000400000-0x0000000000478000-memory.dmp
          Filesize

          480KB

        • memory/116-95-0x0000000000400000-0x0000000000478000-memory.dmp
          Filesize

          480KB

        • memory/180-16-0x0000000077391000-0x00000000774B1000-memory.dmp
          Filesize

          1.1MB

        • memory/180-17-0x0000000074080000-0x0000000074087000-memory.dmp
          Filesize

          28KB

        • memory/1088-83-0x0000000000400000-0x0000000000424000-memory.dmp
          Filesize

          144KB

        • memory/1088-88-0x0000000000400000-0x0000000000424000-memory.dmp
          Filesize

          144KB

        • memory/1088-89-0x0000000000400000-0x0000000000424000-memory.dmp
          Filesize

          144KB

        • memory/1088-71-0x0000000000400000-0x0000000000424000-memory.dmp
          Filesize

          144KB

        • memory/3316-106-0x0000000000400000-0x0000000000490000-memory.dmp
          Filesize

          576KB

        • memory/3316-98-0x0000000000400000-0x0000000000490000-memory.dmp
          Filesize

          576KB

        • memory/4056-77-0x0000000000400000-0x0000000000457000-memory.dmp
          Filesize

          348KB

        • memory/4056-80-0x0000000000400000-0x0000000000457000-memory.dmp
          Filesize

          348KB

        • memory/4056-69-0x0000000000400000-0x0000000000457000-memory.dmp
          Filesize

          348KB

        • memory/4056-81-0x0000000000400000-0x0000000000457000-memory.dmp
          Filesize

          348KB

        • memory/4064-52-0x00000000740B0000-0x00000000740B7000-memory.dmp
          Filesize

          28KB

        • memory/4452-100-0x0000000036A10000-0x0000000036A29000-memory.dmp
          Filesize

          100KB

        • memory/4452-57-0x0000000000490000-0x00000000016E4000-memory.dmp
          Filesize

          18.3MB

        • memory/4452-56-0x0000000000490000-0x00000000016E4000-memory.dmp
          Filesize

          18.3MB

        • memory/4452-103-0x0000000036A10000-0x0000000036A29000-memory.dmp
          Filesize

          100KB

        • memory/4452-104-0x0000000000490000-0x00000000016E4000-memory.dmp
          Filesize

          18.3MB

        • memory/4452-105-0x0000000036A10000-0x0000000036A29000-memory.dmp
          Filesize

          100KB

        • memory/4484-37-0x0000000000490000-0x00000000016E4000-memory.dmp
          Filesize

          18.3MB

        • memory/4484-27-0x0000000077391000-0x00000000774B1000-memory.dmp
          Filesize

          1.1MB

        • memory/4484-22-0x0000000000490000-0x00000000016E4000-memory.dmp
          Filesize

          18.3MB

        • memory/4484-21-0x0000000000490000-0x00000000016E4000-memory.dmp
          Filesize

          18.3MB

        • memory/4484-19-0x0000000077391000-0x00000000774B1000-memory.dmp
          Filesize

          1.1MB

        • memory/4484-18-0x0000000077418000-0x0000000077419000-memory.dmp
          Filesize

          4KB

        • memory/5112-91-0x0000000000400000-0x0000000000490000-memory.dmp
          Filesize

          576KB

        • memory/5112-64-0x0000000000400000-0x0000000000490000-memory.dmp
          Filesize

          576KB

        • memory/5112-63-0x0000000000400000-0x0000000000490000-memory.dmp
          Filesize

          576KB

        • memory/5112-61-0x0000000000400000-0x0000000000490000-memory.dmp
          Filesize

          576KB