Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    17-05-2024 01:29

General

  • Target

    5cebc27b366a165f72fc0f83b570434b6ae5edae22c0e6023d27c9642b702b48.exe

  • Size

    2.4MB

  • MD5

    526153cbd86009228ad53cd262a9c6b3

  • SHA1

    6bbe6ce1bdd69cfd516170d5abe2fe4379b6bac2

  • SHA256

    5cebc27b366a165f72fc0f83b570434b6ae5edae22c0e6023d27c9642b702b48

  • SHA512

    9b01653e6f5b80d8497d8aba00aca45b305feaecd13fd4075ff4e1c06d9cb29d96d0422b3dce43d0b96316510f6fad1e2e49b64ac6038725961de98e7ba9d665

  • SSDEEP

    49152:TF42UxdKzPsUdtK7iOgwNwjlYrdnXJc9Qn3z4:TC2UxdYZhOIeBXJcu3

Malware Config

Signatures

  • DcRat 24 IoCs

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Process spawned unexpected child process 21 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • DCRat payload 3 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Detects executables packed with SmartAssembly 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Drops file in Program Files directory 3 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 21 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\5cebc27b366a165f72fc0f83b570434b6ae5edae22c0e6023d27c9642b702b48.exe
    "C:\Users\Admin\AppData\Local\Temp\5cebc27b366a165f72fc0f83b570434b6ae5edae22c0e6023d27c9642b702b48.exe"
    1⤵
    • DcRat
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2756
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\iR4PpyYAmz.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2188
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:680
        • C:\Users\Admin\AppData\Local\Temp\5cebc27b366a165f72fc0f83b570434b6ae5edae22c0e6023d27c9642b702b48.exe
          "C:\Users\Admin\AppData\Local\Temp\5cebc27b366a165f72fc0f83b570434b6ae5edae22c0e6023d27c9642b702b48.exe"
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1052
          • C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\Idle.exe
            "C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\Idle.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:1772
            • C:\Windows\System32\WScript.exe
              "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\b1942ee7-a0a8-4457-a087-b51e40570a83.vbs"
              5⤵
                PID:2708
              • C:\Windows\System32\WScript.exe
                "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\2fbff078-5fe0-4283-9ea3-7ab318677d0d.vbs"
                5⤵
                  PID:436
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsml" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Sidebar\fr-FR\lsm.exe'" /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:2540
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Sidebar\fr-FR\lsm.exe'" /rl HIGHEST /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:2612
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "lsml" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows Sidebar\fr-FR\lsm.exe'" /rl HIGHEST /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:2696
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "explorere" /sc MINUTE /mo 6 /tr "'C:\Windows\Resources\explorer.exe'" /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:2516
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\Resources\explorer.exe'" /rl HIGHEST /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:1540
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "explorere" /sc MINUTE /mo 14 /tr "'C:\Windows\Resources\explorer.exe'" /rl HIGHEST /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:2356
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 14 /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\dwm.exe'" /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:2152
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\dwm.exe'" /rl HIGHEST /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:2328
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 9 /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\dwm.exe'" /rl HIGHEST /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:2396
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "smsss" /sc MINUTE /mo 6 /tr "'C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\smss.exe'" /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:1252
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\smss.exe'" /rl HIGHEST /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:1488
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "smsss" /sc MINUTE /mo 9 /tr "'C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\smss.exe'" /rl HIGHEST /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:1932
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 6 /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\winlogon.exe'" /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:2184
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\winlogon.exe'" /rl HIGHEST /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:2032
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\winlogon.exe'" /rl HIGHEST /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:1936
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 10 /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\Idle.exe'" /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:1664
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\Idle.exe'" /rl HIGHEST /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:860
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 7 /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\Idle.exe'" /rl HIGHEST /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:2136
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 11 /tr "'C:\Users\Admin\Downloads\winlogon.exe'" /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:2020
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Users\Admin\Downloads\winlogon.exe'" /rl HIGHEST /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:2284
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 8 /tr "'C:\Users\Admin\Downloads\winlogon.exe'" /rl HIGHEST /f
          1⤵
          • DcRat
          • Process spawned unexpected child process
          • Creates scheduled task(s)
          PID:956

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\winlogon.exe

          Filesize

          2.4MB

          MD5

          526153cbd86009228ad53cd262a9c6b3

          SHA1

          6bbe6ce1bdd69cfd516170d5abe2fe4379b6bac2

          SHA256

          5cebc27b366a165f72fc0f83b570434b6ae5edae22c0e6023d27c9642b702b48

          SHA512

          9b01653e6f5b80d8497d8aba00aca45b305feaecd13fd4075ff4e1c06d9cb29d96d0422b3dce43d0b96316510f6fad1e2e49b64ac6038725961de98e7ba9d665

        • C:\Users\Admin\AppData\Local\Temp\2fbff078-5fe0-4283-9ea3-7ab318677d0d.vbs

          Filesize

          509B

          MD5

          23b537cf8094fcbb6ff9a3fd56445d80

          SHA1

          d1e0b5152fb17bd873e615b9066cc5298d62b975

          SHA256

          d40bc4babb8fe46e83d6a0e7ca074d09c8d6f931c2985f1931c9e9d96ea7309c

          SHA512

          e3c056bd9918cd6ce0129c67461229e77e5de19a9939b0278407a2b16566315507ecca969cba03482887fa64dfc00982589ed98b8f640335d3dd8e8b55098b02

        • C:\Users\Admin\AppData\Local\Temp\b1942ee7-a0a8-4457-a087-b51e40570a83.vbs

          Filesize

          733B

          MD5

          796fff4052ddf748fa052a12b91c4252

          SHA1

          ee102b8b12c6127f807e5fbea7f92885b04dcbda

          SHA256

          18e298dcd26ad0e9e29ac8b5a00614748e2154e86c4a6dd9e72e7920d0744063

          SHA512

          495d4382a8ab9e465010c23892661e502b1d6c6299b1c30a5c2bb806c7047467cfa63098a3f599e58868514f10dfaec60517a33a1c8a08aec37e5963eb5de2bc

        • C:\Users\Admin\AppData\Local\Temp\iR4PpyYAmz.bat

          Filesize

          267B

          MD5

          396ecdcd588876860b656c39e7b43478

          SHA1

          aaaab3391b167b2c1b999fdd63ddb90cd535c8fa

          SHA256

          a3f242f8596386f8860ca95203bac5b5e3cdc7f58d7c964cfd37a18a3c5164f4

          SHA512

          1e94bb8c19fe994572d950d94e8da44486624dbbcfd412f14a85109bf66724ad0348791bcbe44f73b35b70d890c318ee4fd541a9da8a73cf61cec123aa26656f

        • memory/1772-40-0x0000000000750000-0x00000000007A6000-memory.dmp

          Filesize

          344KB

        • memory/1772-39-0x00000000002B0000-0x0000000000526000-memory.dmp

          Filesize

          2.5MB

        • memory/2756-5-0x0000000000AB0000-0x0000000000AC6000-memory.dmp

          Filesize

          88KB

        • memory/2756-6-0x0000000000AD0000-0x0000000000B26000-memory.dmp

          Filesize

          344KB

        • memory/2756-8-0x0000000000B20000-0x0000000000B32000-memory.dmp

          Filesize

          72KB

        • memory/2756-9-0x0000000000B30000-0x0000000000B38000-memory.dmp

          Filesize

          32KB

        • memory/2756-10-0x0000000000F70000-0x0000000000F7A000-memory.dmp

          Filesize

          40KB

        • memory/2756-11-0x0000000000F80000-0x0000000000F8E000-memory.dmp

          Filesize

          56KB

        • memory/2756-12-0x0000000000F90000-0x0000000000F9C000-memory.dmp

          Filesize

          48KB

        • memory/2756-7-0x0000000000570000-0x000000000057C000-memory.dmp

          Filesize

          48KB

        • memory/2756-24-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

          Filesize

          9.9MB

        • memory/2756-0-0x000007FEF53D3000-0x000007FEF53D4000-memory.dmp

          Filesize

          4KB

        • memory/2756-4-0x0000000000440000-0x0000000000448000-memory.dmp

          Filesize

          32KB

        • memory/2756-3-0x00000000004D0000-0x00000000004EC000-memory.dmp

          Filesize

          112KB

        • memory/2756-2-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

          Filesize

          9.9MB

        • memory/2756-1-0x0000000000FC0000-0x0000000001236000-memory.dmp

          Filesize

          2.5MB