Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    12-01-2023 21:51

General

  • Target

    a99334c099cac557b3bc62ae7654d3b4.exe

  • Size

    1.5MB

  • MD5

    a99334c099cac557b3bc62ae7654d3b4

  • SHA1

    e1c5e919cd32b2ef32a04920a9992bce6f9e677d

  • SHA256

    56c6f0d228895d66b602e7c81e4e54e7bf9d42d922272dcb3e35c422d375cbd9

  • SHA512

    3238f9a88d0284142731d66e2c94ef88208acadfa3996086237bc076fb05491edd955670fafd47642ed77a47cb971cafd73fb0a10e293842ccfab0aa254eef66

  • SSDEEP

    24576:VSMRshqVg7knYt0srvDhKaU80v3X3Po/ZLJVwZZ+Z5bNAsTio:0OXMTt0KbhU8GeZLLI85bNAs

Malware Config

Signatures

  • DcRat

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

  • Process spawned unexpected child process 33 IoCs

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

  • DCRat payload 4 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • 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 2 IoCs
  • Drops file in Windows directory 7 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 33 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a99334c099cac557b3bc62ae7654d3b4.exe
    "C:\Users\Admin\AppData\Local\Temp\a99334c099cac557b3bc62ae7654d3b4.exe"
    1⤵
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:832
    • C:\MSOCache\All Users\dwm.exe
      "C:\MSOCache\All Users\dwm.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1376
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 13 /tr "'C:\Windows\Microsoft.NET\assembly\explorer.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1776
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\Microsoft.NET\assembly\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1568
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 8 /tr "'C:\Windows\Microsoft.NET\assembly\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:388
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 7 /tr "'C:\Recovery\5e97ab82-6219-11ed-b9ee-5e34c4ab0fa3\explorer.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1268
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Recovery\5e97ab82-6219-11ed-b9ee-5e34c4ab0fa3\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1400
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 10 /tr "'C:\Recovery\5e97ab82-6219-11ed-b9ee-5e34c4ab0fa3\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:864
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 10 /tr "'C:\Users\All Users\spoolsv.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1780
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Users\All Users\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1644
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 6 /tr "'C:\Users\All Users\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1452
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\csrss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1804
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1716
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:928
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\dwm.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1700
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\MSOCache\All Users\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1608
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 12 /tr "'C:\MSOCache\All Users\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:316
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\Users\Default\Templates\smss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1876
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Users\Default\Templates\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1688
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 13 /tr "'C:\Users\Default\Templates\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2028
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 6 /tr "'C:\Windows\Setup\State\explorer.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1592
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\Setup\State\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1596
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 14 /tr "'C:\Windows\Setup\State\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:580
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Windows Sidebar\ja-JP\lsm.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:696
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Sidebar\ja-JP\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1844
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Sidebar\ja-JP\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:844
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 5 /tr "'C:\Windows\Fonts\smss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1948
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Windows\Fonts\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1632
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 9 /tr "'C:\Windows\Fonts\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:892
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 12 /tr "'C:\Recovery\5e97ab82-6219-11ed-b9ee-5e34c4ab0fa3\WMIADAP.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1464
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\Recovery\5e97ab82-6219-11ed-b9ee-5e34c4ab0fa3\WMIADAP.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1684
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 5 /tr "'C:\Recovery\5e97ab82-6219-11ed-b9ee-5e34c4ab0fa3\WMIADAP.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:592
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 7 /tr "'C:\Recovery\5e97ab82-6219-11ed-b9ee-5e34c4ab0fa3\smss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1872
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Recovery\5e97ab82-6219-11ed-b9ee-5e34c4ab0fa3\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:976
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 6 /tr "'C:\Recovery\5e97ab82-6219-11ed-b9ee-5e34c4ab0fa3\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1452

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\MSOCache\All Users\dwm.exe

    Filesize

    1.5MB

    MD5

    a99334c099cac557b3bc62ae7654d3b4

    SHA1

    e1c5e919cd32b2ef32a04920a9992bce6f9e677d

    SHA256

    56c6f0d228895d66b602e7c81e4e54e7bf9d42d922272dcb3e35c422d375cbd9

    SHA512

    3238f9a88d0284142731d66e2c94ef88208acadfa3996086237bc076fb05491edd955670fafd47642ed77a47cb971cafd73fb0a10e293842ccfab0aa254eef66

  • C:\MSOCache\All Users\dwm.exe

    Filesize

    1.5MB

    MD5

    a99334c099cac557b3bc62ae7654d3b4

    SHA1

    e1c5e919cd32b2ef32a04920a9992bce6f9e677d

    SHA256

    56c6f0d228895d66b602e7c81e4e54e7bf9d42d922272dcb3e35c422d375cbd9

    SHA512

    3238f9a88d0284142731d66e2c94ef88208acadfa3996086237bc076fb05491edd955670fafd47642ed77a47cb971cafd73fb0a10e293842ccfab0aa254eef66

  • memory/832-57-0x0000000000630000-0x0000000000646000-memory.dmp

    Filesize

    88KB

  • memory/832-54-0x0000000000FE0000-0x000000000115A000-memory.dmp

    Filesize

    1.5MB

  • memory/832-58-0x0000000000A90000-0x0000000000AA2000-memory.dmp

    Filesize

    72KB

  • memory/832-59-0x0000000000AC0000-0x0000000000ACC000-memory.dmp

    Filesize

    48KB

  • memory/832-60-0x0000000000AE0000-0x0000000000AEE000-memory.dmp

    Filesize

    56KB

  • memory/832-61-0x0000000000AD0000-0x0000000000ADC000-memory.dmp

    Filesize

    48KB

  • memory/832-56-0x0000000000490000-0x00000000004AC000-memory.dmp

    Filesize

    112KB

  • memory/832-55-0x0000000000400000-0x000000000040E000-memory.dmp

    Filesize

    56KB

  • memory/1376-62-0x0000000000000000-mapping.dmp

  • memory/1376-65-0x00000000013A0000-0x000000000151A000-memory.dmp

    Filesize

    1.5MB

  • memory/1376-66-0x0000000000480000-0x0000000000492000-memory.dmp

    Filesize

    72KB