Analysis

  • max time kernel
    40s
  • max time network
    49s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-06-2024 00:16

General

  • Target

    1b6293c7f0dfed044b0eba8b98b0faff.exe

  • Size

    1.4MB

  • MD5

    1b6293c7f0dfed044b0eba8b98b0faff

  • SHA1

    e5705cbb256bb0b1a350e1b9fb71c1a1e4ac605a

  • SHA256

    fe014092ae92e8372849bed9f5cf33946e8d918bdc50feddc1316bc837414ba8

  • SHA512

    694e9afd04089172c991a712849049545459ceeed99780a6f012ca086fa2d1b70bbd627534b85b1797f4be22feda55e46e6966fe96a2ee66effdeeaa2eb650a5

  • SSDEEP

    24576:d2G/nvxW3WckpJWjXbNQsVZy8v8BQSsZWcJ48z2AB4:dbA3wvW+sVZy8fZWmz9

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/1253689379948593173/lzPh5dDD7ETWYLRPMt2M_Ml82yS42YxolYTwBWldi4NXuLOvpMPhz7AlFtFln1RxcqaC

Signatures

  • 44Caliber

    An open source infostealer written in C#.

  • DcRat

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

  • Process spawned unexpected child process 9 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.

  • Checks computer location settings 2 TTPs 4 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 2 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 9 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 19 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\1b6293c7f0dfed044b0eba8b98b0faff.exe
    "C:\Users\Admin\AppData\Local\Temp\1b6293c7f0dfed044b0eba8b98b0faff.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3100
    • C:\Users\Admin\AppData\Local\Temp\svchost.exe
      "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:2756
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Hypercommon\s6qV8wojz3Yx3vhyfOAzGuFvxlJ5l.vbe"
        3⤵
        • Checks computer location settings
        • Suspicious use of WriteProcessMemory
        PID:4844
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Hypercommon\Udwe1ynNPaETo.bat" "
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3928
          • C:\Hypercommon\ServercrtDll.exe
            "C:\Hypercommon\ServercrtDll.exe"
            5⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Modifies registry class
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:1284
            • C:\Windows\System32\cmd.exe
              "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\BgsClO9IFy.bat"
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:736
              • C:\Windows\system32\w32tm.exe
                w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
                7⤵
                  PID:4604
                • C:\Users\Public\Music\fontdrvhost.exe
                  "C:\Users\Public\Music\fontdrvhost.exe"
                  7⤵
                  • Executes dropped EXE
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2572
      • C:\Users\Admin\AppData\Local\Temp\explorer.exe
        "C:\Users\Admin\AppData\Local\Temp\explorer.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4596
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4872
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1576
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3536
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 7 /tr "'C:\Users\Public\Music\fontdrvhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4932
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Users\Public\Music\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3764
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 10 /tr "'C:\Users\Public\Music\fontdrvhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4532
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\upfc.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3828
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\upfc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1488
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\upfc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1432

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Hypercommon\ServercrtDll.exe

      Filesize

      828KB

      MD5

      801d5740c780d09b1cc6d971ce8b280f

      SHA1

      c7188e6f5998405d9dcbe83ce5d29267861be07d

      SHA256

      b678bee38602b80df34f15e4555bb689e2eb6aef26f4c273d652c88f8825c33f

      SHA512

      3296e517a6e0d6d3feb1f9d1544664b87589130d8a28f205626b2182ecdf333ff404f311ce69730d509e3072432024d3ed16db7068d35925375d9ecc5fe82b49

    • C:\Hypercommon\Udwe1ynNPaETo.bat

      Filesize

      33B

      MD5

      1af82b77403306ff43f68bf7a0786c52

      SHA1

      730a3bd4b524ffa024657c1fc27ffd82e25f3f81

      SHA256

      e358e4c2fc541cc4e5614b1af9360a85a32fc53babbc57ecf5858fe71d334f96

      SHA512

      0e33b779aceb2a42f5c42e07bcd3ac70a3dbb1fd2bbd4ae154979735f58eeaab5abea05cea682f4b73f6b54174ace8ac3046c6e9a84c4a729a6ed2bffa1a9ec1

    • C:\Hypercommon\s6qV8wojz3Yx3vhyfOAzGuFvxlJ5l.vbe

      Filesize

      201B

      MD5

      0f314eb5d52ce9cd85095eadff4f908c

      SHA1

      272d25d43f789dd5fad479ab31e96214f82302b3

      SHA256

      f17ea2d9d889ef2012cb57191ad3a1d2d3351df8539b4029d6f7080d66217e89

      SHA512

      471b72558c045bc4acd276087d82e564aa7685373dea3ac3e90390df0f7f42ea06ae0254d3a4a9dc57312c7b1485916f4d470bd353b4b8c0b35d705573105f09

    • C:\Users\Admin\AppData\Local\Temp\BgsClO9IFy.bat

      Filesize

      202B

      MD5

      096410ff9636c2c9cdaa1765b3c96ece

      SHA1

      0950e3c6def2875d9480ba6b6c6bdf3ebeb70152

      SHA256

      39bc6f177ccade9b73a38dd2a813c2213537d2f78a080a08fd776a5828aa924e

      SHA512

      05ec4437164c603fae98069d522edec7520a5af844ea5c071ad37211273c8ca2ade2f7d37c74ef3a941348ce41fb8bdb0074d9f95ce34ff4b38c4935073ef2c0

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

      Filesize

      303KB

      MD5

      7d9282b8529bbb4ac06a3994fbcd0622

      SHA1

      d38d467c5e533f3bc247b6ed245fb08412a479d7

      SHA256

      ca5820bbbcbefd08f5ec820b833b23f7f97556a247da39510a70cbe7b809e3a9

      SHA512

      aec2d63548176dc1a8ad3d2dfce0bc41973230c6898c55171dec7fc2919b84a8061d4308449c9551cc40ac7c08ad773fd6a7818bbd748ede9be64acc11dcfca5

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

      Filesize

      1.1MB

      MD5

      3ee661f4a9794c72a91fa1f783f54969

      SHA1

      35780f52351da65b60cc63b302018950cbfe849f

      SHA256

      ebcaf07121ce2483989e7a71d00b83c54b942f71e51271d5b28886ef03e45b51

      SHA512

      0b53edac853f257b3c40b8b8014f0b0d53f546410d352965eace8eb251b2d75aa02e171586750a70dd97a4bc103b4b7707e90d5bd7a47c786858514f83281bde

    • memory/1284-39-0x0000000000C30000-0x0000000000D06000-memory.dmp

      Filesize

      856KB

    • memory/3100-0-0x0000000074FCE000-0x0000000074FCF000-memory.dmp

      Filesize

      4KB

    • memory/3100-2-0x0000000005AF0000-0x0000000005B8C000-memory.dmp

      Filesize

      624KB

    • memory/3100-1-0x0000000000F70000-0x00000000010DC000-memory.dmp

      Filesize

      1.4MB

    • memory/4596-23-0x00007FFEF8BF3000-0x00007FFEF8BF5000-memory.dmp

      Filesize

      8KB

    • memory/4596-26-0x00007FFEF8BF0000-0x00007FFEF96B1000-memory.dmp

      Filesize

      10.8MB

    • memory/4596-24-0x0000018E68550000-0x0000018E685A2000-memory.dmp

      Filesize

      328KB

    • memory/4596-55-0x00007FFEF8BF0000-0x00007FFEF96B1000-memory.dmp

      Filesize

      10.8MB