Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    31-10-2023 12:42

General

  • Target

    PO 1100620230526.pdf(39kb).exe

  • Size

    1.8MB

  • MD5

    26b43cadf6622b3d0e50bf3763cc5180

  • SHA1

    d84d2f83975f74767e7d398e8ad039be00c47598

  • SHA256

    089fe1a7004a07e2fa5a8e706359b2d8d0b141bbc4719db9bc378e33b0771764

  • SHA512

    1c8e2f1063f654ca94b67e1e651dfbaf5f10d8a0d1cf40bb8280877bae550df467f7574c0118d7d7d833b9b155619fe22168d3efeff916f16ad8c21b817f7fe4

  • SSDEEP

    49152:xkQTA+5XkXJqDxHtrZPfnV2gAUCkSbVRb0ilg7/mHHH:xa+9kElHrIjU/CzG7eHn

Malware Config

Extracted

Family

remcos

Botnet

HARD

C2

cloudhost.myfirewall.org:9302

sandshoe.myfirewall.org:2404

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    WindowUpdate.exe

  • delete_file

    false

  • hide_file

    true

  • hide_keylog_file

    false

  • install_flag

    false

  • install_path

    %Temp%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    RmcqSxe-3TCTRL

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Extracted

Family

xpertrat

Version

3.0.10

Botnet

FLEX

C2

sandshoe.myfirewall.org:5344

Mutex

U1B5S2E0-S6R4-Y4O1-P7F0-W443P1Y6S3M2

Signatures

  • Remcos

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

  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 1 IoCs
  • XpertRAT

    XpertRAT is a remote access trojan with various capabilities.

  • XpertRAT Core payload 1 IoCs
  • NirSoft MailPassView 3 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 7 IoCs
  • Adds policy Run key to start application 2 TTPs 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 4 IoCs
  • Windows security modification 2 TTPs 1 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 51 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PO 1100620230526.pdf(39kb).exe
    "C:\Users\Admin\AppData\Local\Temp\PO 1100620230526.pdf(39kb).exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2176
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe"
      2⤵
        PID:1612
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe"
        2⤵
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2068
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\dqnlnzxqqaewtxvtubagtxofsfiyrl"
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2636
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\nksdnrijlixbddjxdmvawkioatrzkwuwrs"
          3⤵
          • Accesses Microsoft Outlook accounts
          PID:2584
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe /stext "C:\Users\Admin\AppData\Local\Temp\ymywok"
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2652
        • C:\Users\Admin\AppData\Local\Temp\Iserver.exe
          "C:\Users\Admin\AppData\Local\Temp\Iserver.exe"
          3⤵
          • UAC bypass
          • Windows security bypass
          • Executes dropped EXE
          • Loads dropped DLL
          • Windows security modification
          • Checks whether UAC is enabled
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          • System policy modification
          PID:2680
          • C:\Program Files (x86)\Internet Explorer\iexplore.exe
            C:\Users\Admin\AppData\Local\Temp\Iserver.exe
            4⤵
            • Adds policy Run key to start application
            • Adds Run key to start application
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:3036

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\remcos\logs.dat

      Filesize

      144B

      MD5

      cb9e42a922603f8477395c363d08b0bb

      SHA1

      2dc764dc2dc62f2b1e417c9c4e689040d0cc0e15

      SHA256

      408fb2d53de04603450704678dedb42362bb63056816997110bef0e6e2de78d7

      SHA512

      4c076a4fe27b4857f9bff1d69f71c2a9cb17c3a55bde50d3fac143ac025a61160f81df412e68e6718f096d61dddbb854b38965af2a89b900ecb4b3a9775f387b

    • C:\Users\Admin\AppData\Local\Temp\Iserver.exe

      Filesize

      172KB

      MD5

      98dba4873d2b9b467158400540b5eebe

      SHA1

      4769f5a15191e8ac78ae46544f52414e47fedd30

      SHA256

      7532708eb8b2150fc58ff178790f86ab88f1352f82dcf450500abd52b92f64f4

      SHA512

      37f5ed08eb29ef0d316e6e0e08a47b4a18721d74f81f367b0564038a9f82912ad0a1278733947ca4b9da7139c8aecbf09fb937f10c7f956d1e5e31fa71a9c666

    • C:\Users\Admin\AppData\Local\Temp\Iserver.exe

      Filesize

      172KB

      MD5

      98dba4873d2b9b467158400540b5eebe

      SHA1

      4769f5a15191e8ac78ae46544f52414e47fedd30

      SHA256

      7532708eb8b2150fc58ff178790f86ab88f1352f82dcf450500abd52b92f64f4

      SHA512

      37f5ed08eb29ef0d316e6e0e08a47b4a18721d74f81f367b0564038a9f82912ad0a1278733947ca4b9da7139c8aecbf09fb937f10c7f956d1e5e31fa71a9c666

    • C:\Users\Admin\AppData\Local\Temp\dqnlnzxqqaewtxvtubagtxofsfiyrl

      Filesize

      2B

      MD5

      f3b25701fe362ec84616a93a45ce9998

      SHA1

      d62636d8caec13f04e28442a0a6fa1afeb024bbb

      SHA256

      b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

      SHA512

      98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

    • C:\Users\Admin\AppData\Roaming\U1B5S2E0-S6R4-Y4O1-P7F0-W443P1Y6S3M2\U1B5S2E0-S6R4-Y4O1-P7F0-W443P1Y6S3M2.exe

      Filesize

      172KB

      MD5

      98dba4873d2b9b467158400540b5eebe

      SHA1

      4769f5a15191e8ac78ae46544f52414e47fedd30

      SHA256

      7532708eb8b2150fc58ff178790f86ab88f1352f82dcf450500abd52b92f64f4

      SHA512

      37f5ed08eb29ef0d316e6e0e08a47b4a18721d74f81f367b0564038a9f82912ad0a1278733947ca4b9da7139c8aecbf09fb937f10c7f956d1e5e31fa71a9c666

    • \Users\Admin\AppData\Local\Temp\Iserver.exe

      Filesize

      172KB

      MD5

      98dba4873d2b9b467158400540b5eebe

      SHA1

      4769f5a15191e8ac78ae46544f52414e47fedd30

      SHA256

      7532708eb8b2150fc58ff178790f86ab88f1352f82dcf450500abd52b92f64f4

      SHA512

      37f5ed08eb29ef0d316e6e0e08a47b4a18721d74f81f367b0564038a9f82912ad0a1278733947ca4b9da7139c8aecbf09fb937f10c7f956d1e5e31fa71a9c666

    • \Users\Admin\AppData\Local\Temp\Iserver.exe

      Filesize

      172KB

      MD5

      98dba4873d2b9b467158400540b5eebe

      SHA1

      4769f5a15191e8ac78ae46544f52414e47fedd30

      SHA256

      7532708eb8b2150fc58ff178790f86ab88f1352f82dcf450500abd52b92f64f4

      SHA512

      37f5ed08eb29ef0d316e6e0e08a47b4a18721d74f81f367b0564038a9f82912ad0a1278733947ca4b9da7139c8aecbf09fb937f10c7f956d1e5e31fa71a9c666

    • \Users\Admin\AppData\Local\Temp\Iserver.exe

      Filesize

      172KB

      MD5

      98dba4873d2b9b467158400540b5eebe

      SHA1

      4769f5a15191e8ac78ae46544f52414e47fedd30

      SHA256

      7532708eb8b2150fc58ff178790f86ab88f1352f82dcf450500abd52b92f64f4

      SHA512

      37f5ed08eb29ef0d316e6e0e08a47b4a18721d74f81f367b0564038a9f82912ad0a1278733947ca4b9da7139c8aecbf09fb937f10c7f956d1e5e31fa71a9c666

    • \Users\Admin\AppData\Local\Temp\Iserver.exe

      Filesize

      172KB

      MD5

      98dba4873d2b9b467158400540b5eebe

      SHA1

      4769f5a15191e8ac78ae46544f52414e47fedd30

      SHA256

      7532708eb8b2150fc58ff178790f86ab88f1352f82dcf450500abd52b92f64f4

      SHA512

      37f5ed08eb29ef0d316e6e0e08a47b4a18721d74f81f367b0564038a9f82912ad0a1278733947ca4b9da7139c8aecbf09fb937f10c7f956d1e5e31fa71a9c666

    • memory/2068-25-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-36-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-14-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-16-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-18-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-20-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-22-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-24-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2068-119-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-112-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-28-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-29-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-30-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-32-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-33-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-34-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-35-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-10-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-38-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-39-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-40-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-42-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-111-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-107-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2068-49-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-54-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-103-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-102-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2068-101-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2068-98-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2068-99-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-95-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2068-58-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-12-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-75-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2068-8-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2176-4-0x0000000004DB0000-0x0000000004DF0000-memory.dmp

      Filesize

      256KB

    • memory/2176-2-0x0000000004DB0000-0x0000000004DF0000-memory.dmp

      Filesize

      256KB

    • memory/2176-0-0x0000000074BE0000-0x00000000752CE000-memory.dmp

      Filesize

      6.9MB

    • memory/2176-7-0x0000000004DB0000-0x0000000004DF0000-memory.dmp

      Filesize

      256KB

    • memory/2176-27-0x0000000074BE0000-0x00000000752CE000-memory.dmp

      Filesize

      6.9MB

    • memory/2176-6-0x00000000009A0000-0x00000000009AA000-memory.dmp

      Filesize

      40KB

    • memory/2176-5-0x0000000004DF0000-0x0000000004F98000-memory.dmp

      Filesize

      1.7MB

    • memory/2176-1-0x0000000004FA0000-0x0000000005148000-memory.dmp

      Filesize

      1.7MB

    • memory/2176-3-0x0000000004DB0000-0x0000000004DF0000-memory.dmp

      Filesize

      256KB

    • memory/2584-60-0x0000000000400000-0x0000000000457000-memory.dmp

      Filesize

      348KB

    • memory/2584-51-0x0000000000400000-0x0000000000457000-memory.dmp

      Filesize

      348KB

    • memory/2584-104-0x0000000000400000-0x0000000000457000-memory.dmp

      Filesize

      348KB

    • memory/2584-64-0x0000000000400000-0x0000000000457000-memory.dmp

      Filesize

      348KB

    • memory/2584-57-0x0000000000400000-0x0000000000457000-memory.dmp

      Filesize

      348KB

    • memory/2636-63-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2636-92-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2636-55-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2636-43-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2636-45-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2652-65-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/2652-68-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/2652-59-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/2652-67-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/3036-81-0x0000000000400000-0x0000000000443000-memory.dmp

      Filesize

      268KB