Resubmissions

04-12-2024 10:05

241204-l4my1sxmgn 10

04-12-2024 10:02

241204-l2r5ysxmck 10

Analysis

  • max time kernel
    146s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    04-12-2024 10:02

General

  • Target

    Neverlose.exe

  • Size

    2.6MB

  • MD5

    1924cb0ae8b7ccca9e8030087ecc5a94

  • SHA1

    a1f4565cb089b27fd3deacd0fd93733f8f0f4c32

  • SHA256

    ffc00ef9763576969540d6f2d16a929bad4c3ffc9f4e97cf60206f56a2a7718d

  • SHA512

    46ac86ae174c77cd3c81a63a6bce589260a4412d29d4704caa8bc4a064d62859f37fdfb2f5dea48e3c415c5db074f964af732c34b0e2e2ea56db6505124d33ad

  • SSDEEP

    49152:ubA3jHZLMGaxfSIkbO+7+KrktBibbg8LU7x/5uzMk+:ub4Z4Bxqg4rkvibb1Yt5u1+

Malware Config

Signatures

  • DcRat 20 IoCs

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

  • Dcrat family
  • Modifies WinLogon for persistence 2 TTPs 6 IoCs
  • Process spawned unexpected child process 18 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.

  • Disables Task Manager via registry modification
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Adds Run key to start application 2 TTPs 12 IoCs
  • Drops file in Program Files directory 7 IoCs
  • Drops file in Windows directory 3 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry key 1 TTPs 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 18 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 20 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 25 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\Neverlose.exe
    "C:\Users\Admin\AppData\Local\Temp\Neverlose.exe"
    1⤵
    • DcRat
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3032
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\mIIccrosoft\VeA0JL7xlD4tfYfCo.vbe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2724
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\mIIccrosoft\XqamRZ1Xoz1ZjGFCXqY6WSXlph.bat" "
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2640
        • C:\mIIccrosoft\Winmonitordhcp.exe
          "C:\mIIccrosoft\Winmonitordhcp.exe"
          4⤵
          • DcRat
          • Modifies WinLogon for persistence
          • Executes dropped EXE
          • Adds Run key to start application
          • Drops file in Program Files directory
          • Drops file in Windows directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2552
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\9WPi3mVAsM.bat"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:1076
            • C:\Windows\system32\w32tm.exe
              w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
              6⤵
                PID:2756
              • C:\Program Files (x86)\Windows Defender\en-US\lsass.exe
                "C:\Program Files (x86)\Windows Defender\en-US\lsass.exe"
                6⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious behavior: GetForegroundWindowSpam
                • Suspicious use of AdjustPrivilegeToken
                PID:300
          • C:\Windows\SysWOW64\reg.exe
            reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
            4⤵
            • System Location Discovery: System Language Discovery
            • Modifies registry key
            PID:2092
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\taskhost.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1200
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\taskhost.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:536
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\taskhost.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:776
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 10 /tr "'C:\Program Files\Google\Chrome\Application\106.0.5249.119\dwm.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:984
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Program Files\Google\Chrome\Application\106.0.5249.119\dwm.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1120
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 7 /tr "'C:\Program Files\Google\Chrome\Application\106.0.5249.119\dwm.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2512
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 12 /tr "'C:\Windows\system\csrss.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2704
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\system\csrss.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2924
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Windows\system\csrss.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2384
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Defender\en-US\lsass.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2440
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\en-US\lsass.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1192
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows Defender\en-US\lsass.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:760
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 5 /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\dllhost.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2364
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1988
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 6 /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2460
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\OSPPSVC.exe'" /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2380
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\MSOCache\All Users\OSPPSVC.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1708
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 14 /tr "'C:\MSOCache\All Users\OSPPSVC.exe'" /rl HIGHEST /f
      1⤵
      • DcRat
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1380

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\9WPi3mVAsM.bat

      Filesize

      220B

      MD5

      f6258777472aee696a604484b77aff35

      SHA1

      efd84ee301cd969fe99a663e09f199fbf889e8df

      SHA256

      68d9d6304d17ea6d2b074d51c097c129caa9ac014cdd90b7363f7bee5f467761

      SHA512

      3edb8c8c1bce861c14904f4e90fbb6da25ce14f7eac8975eee9bed3406feb0e32552a357b63bb3370617049cff292d6d6cb45714fa3c7649832a49980eb51383

    • C:\mIIccrosoft\VeA0JL7xlD4tfYfCo.vbe

      Filesize

      214B

      MD5

      e955b2ec1be8959f39d773b8c8417732

      SHA1

      51a89326d1425d8b8bf9db97c2db4dc73ded184e

      SHA256

      741f26d85e76dcba0b82c0ca409cb8222ff1a11faff2e5240f4cc5802d5fb882

      SHA512

      97f8610cd350239ed2363b3bd1ff561daff629754536154940401d2f46080bc3660ec71fc74df25a6e0392f5e4c70d7afad031384fd373899b240801da379ea1

    • C:\mIIccrosoft\Winmonitordhcp.exe

      Filesize

      2.3MB

      MD5

      988542961c81da353a3dc109c65b8408

      SHA1

      424508109934444e670a5a3565d83ffa0c7ac9ec

      SHA256

      1f25153fef26a01656b3b31dc0e84d85a24571d06308029c13a8b2ac4977e22c

      SHA512

      d63b8032ad1cec921e857985b73d918026d40b998b26e21d7b3fbefce3dd3dee060a5ce2e609db44894422897f25816597f0c70005bcee4f2749f7cc6a0a8091

    • C:\mIIccrosoft\XqamRZ1Xoz1ZjGFCXqY6WSXlph.bat

      Filesize

      147B

      MD5

      b6b458cde945cc0c95245c764a82eabf

      SHA1

      d8f0ddb6bf54e07f88f12e7efa92c1709ef25463

      SHA256

      a98a5c09761c4ec2465434b70a052e8141e16195f8aa884984da0cf41601789d

      SHA512

      301e603aaf53f9778e799baba419318d87c5e69058c878f2fa6e76dd68e35e76b49b334c1fa46cc2754c4b339f0bcc507bdbb76294b0ff3d24685563b3ca5395

    • memory/300-40-0x0000000000490000-0x00000000004A2000-memory.dmp

      Filesize

      72KB

    • memory/300-39-0x00000000012B0000-0x0000000001500000-memory.dmp

      Filesize

      2.3MB

    • memory/2552-16-0x00000000005A0000-0x00000000005F6000-memory.dmp

      Filesize

      344KB

    • memory/2552-17-0x0000000000260000-0x0000000000272000-memory.dmp

      Filesize

      72KB

    • memory/2552-18-0x0000000000310000-0x000000000031E000-memory.dmp

      Filesize

      56KB

    • memory/2552-19-0x0000000000610000-0x0000000000618000-memory.dmp

      Filesize

      32KB

    • memory/2552-15-0x00000000002F0000-0x0000000000306000-memory.dmp

      Filesize

      88KB

    • memory/2552-14-0x0000000000240000-0x000000000025C000-memory.dmp

      Filesize

      112KB

    • memory/2552-13-0x0000000001390000-0x00000000015E0000-memory.dmp

      Filesize

      2.3MB