Analysis

  • max time kernel
    128s
  • max time network
    128s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    18-04-2022 12:37

General

  • Target

    c20fa32bcec64fb853a75c8a25a185682a3ef4ed77f5cb1378512d0f942c077f.exe

  • Size

    876KB

  • MD5

    d0984b64a82a8564e0309ca82f581035

  • SHA1

    18c8163ab1dddba15ecc8af94ee3d1a61c28cdef

  • SHA256

    c20fa32bcec64fb853a75c8a25a185682a3ef4ed77f5cb1378512d0f942c077f

  • SHA512

    b589f8b92fe9d08cedfadfece30848ec97c42123ce203a506dde326a0e2361fbb03ca4b2f69d2bb7915d17baed1c19e96906d1cba7f9d3fc14e2b86f8ac56416

Malware Config

Signatures

  • MassLogger

    Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

  • MassLogger Main Payload 6 IoCs
  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Loads dropped DLL 5 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 35 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c20fa32bcec64fb853a75c8a25a185682a3ef4ed77f5cb1378512d0f942c077f.exe
    "C:\Users\Admin\AppData\Local\Temp\c20fa32bcec64fb853a75c8a25a185682a3ef4ed77f5cb1378512d0f942c077f.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1100
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v admin /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\Desktop\.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2028
      • C:\Windows\SysWOW64\reg.exe
        REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v admin /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\Desktop\.exe"
        3⤵
        • Adds Run key to start application
        PID:1748
    • C:\Users\Admin\Desktop\.exe
      "C:\Users\Admin\Desktop\.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1696
      • C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
        "C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • outlook_office_path
        • outlook_win_path
        PID:1144

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe

    Filesize

    41KB

    MD5

    6a673bfc3b67ae9782cb31af2f234c68

    SHA1

    7544e89566d91e84e3cd437b9a073e5f6b56566e

    SHA256

    978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

    SHA512

    72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

  • C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe

    Filesize

    41KB

    MD5

    6a673bfc3b67ae9782cb31af2f234c68

    SHA1

    7544e89566d91e84e3cd437b9a073e5f6b56566e

    SHA256

    978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

    SHA512

    72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

  • C:\Users\Admin\AppData\Local\Temp\e34dd831-6d57-4d92-81ec-c008864dca6e\AgileDotNetRT.dll

    Filesize

    94KB

    MD5

    14ff402962ad21b78ae0b4c43cd1f194

    SHA1

    f8a510eb26666e875a5bdd1cadad40602763ad72

    SHA256

    fb9646cb956945bdc503e69645f6b5316d3826b780d3c36738d6b944e884d15b

    SHA512

    daa7a08bf3709119a944bce28f6ebdd24e54a22b18cd9f86a87873e958df121a3881dcdd5e162f6b4e543238c7aef20f657c9830df01d4c79290f7c9a4fcc54b

  • C:\Users\Admin\Desktop\.exe

    Filesize

    876KB

    MD5

    d0984b64a82a8564e0309ca82f581035

    SHA1

    18c8163ab1dddba15ecc8af94ee3d1a61c28cdef

    SHA256

    c20fa32bcec64fb853a75c8a25a185682a3ef4ed77f5cb1378512d0f942c077f

    SHA512

    b589f8b92fe9d08cedfadfece30848ec97c42123ce203a506dde326a0e2361fbb03ca4b2f69d2bb7915d17baed1c19e96906d1cba7f9d3fc14e2b86f8ac56416

  • C:\Users\Admin\Desktop\.exe

    Filesize

    876KB

    MD5

    d0984b64a82a8564e0309ca82f581035

    SHA1

    18c8163ab1dddba15ecc8af94ee3d1a61c28cdef

    SHA256

    c20fa32bcec64fb853a75c8a25a185682a3ef4ed77f5cb1378512d0f942c077f

    SHA512

    b589f8b92fe9d08cedfadfece30848ec97c42123ce203a506dde326a0e2361fbb03ca4b2f69d2bb7915d17baed1c19e96906d1cba7f9d3fc14e2b86f8ac56416

  • \Users\Admin\AppData\Local\Temp\AddInProcess32.exe

    Filesize

    41KB

    MD5

    6a673bfc3b67ae9782cb31af2f234c68

    SHA1

    7544e89566d91e84e3cd437b9a073e5f6b56566e

    SHA256

    978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

    SHA512

    72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

  • \Users\Admin\AppData\Local\Temp\b35bc50e-fc56-4239-a7d0-bb79118b31c9\AgileDotNetRT.dll

    Filesize

    94KB

    MD5

    14ff402962ad21b78ae0b4c43cd1f194

    SHA1

    f8a510eb26666e875a5bdd1cadad40602763ad72

    SHA256

    fb9646cb956945bdc503e69645f6b5316d3826b780d3c36738d6b944e884d15b

    SHA512

    daa7a08bf3709119a944bce28f6ebdd24e54a22b18cd9f86a87873e958df121a3881dcdd5e162f6b4e543238c7aef20f657c9830df01d4c79290f7c9a4fcc54b

  • \Users\Admin\AppData\Local\Temp\e34dd831-6d57-4d92-81ec-c008864dca6e\AgileDotNetRT.dll

    Filesize

    94KB

    MD5

    14ff402962ad21b78ae0b4c43cd1f194

    SHA1

    f8a510eb26666e875a5bdd1cadad40602763ad72

    SHA256

    fb9646cb956945bdc503e69645f6b5316d3826b780d3c36738d6b944e884d15b

    SHA512

    daa7a08bf3709119a944bce28f6ebdd24e54a22b18cd9f86a87873e958df121a3881dcdd5e162f6b4e543238c7aef20f657c9830df01d4c79290f7c9a4fcc54b

  • \Users\Admin\AppData\Local\Temp\e34dd831-6d57-4d92-81ec-c008864dca6e\AgileDotNetRT.dll

    Filesize

    94KB

    MD5

    14ff402962ad21b78ae0b4c43cd1f194

    SHA1

    f8a510eb26666e875a5bdd1cadad40602763ad72

    SHA256

    fb9646cb956945bdc503e69645f6b5316d3826b780d3c36738d6b944e884d15b

    SHA512

    daa7a08bf3709119a944bce28f6ebdd24e54a22b18cd9f86a87873e958df121a3881dcdd5e162f6b4e543238c7aef20f657c9830df01d4c79290f7c9a4fcc54b

  • \Users\Admin\Desktop\.exe

    Filesize

    876KB

    MD5

    d0984b64a82a8564e0309ca82f581035

    SHA1

    18c8163ab1dddba15ecc8af94ee3d1a61c28cdef

    SHA256

    c20fa32bcec64fb853a75c8a25a185682a3ef4ed77f5cb1378512d0f942c077f

    SHA512

    b589f8b92fe9d08cedfadfece30848ec97c42123ce203a506dde326a0e2361fbb03ca4b2f69d2bb7915d17baed1c19e96906d1cba7f9d3fc14e2b86f8ac56416

  • memory/1100-54-0x0000000000D60000-0x0000000000E42000-memory.dmp

    Filesize

    904KB

  • memory/1100-58-0x0000000074610000-0x0000000074690000-memory.dmp

    Filesize

    512KB

  • memory/1100-56-0x00000000005D0000-0x0000000000608000-memory.dmp

    Filesize

    224KB

  • memory/1100-55-0x0000000074B51000-0x0000000074B53000-memory.dmp

    Filesize

    8KB

  • memory/1144-77-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1144-85-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1144-74-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1144-75-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1144-78-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1144-79-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1144-87-0x0000000004B85000-0x0000000004B96000-memory.dmp

    Filesize

    68KB

  • memory/1144-80-0x000000000048175E-mapping.dmp

  • memory/1144-83-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1696-69-0x0000000074610000-0x0000000074690000-memory.dmp

    Filesize

    512KB

  • memory/1696-65-0x0000000001050000-0x0000000001132000-memory.dmp

    Filesize

    904KB

  • memory/1696-62-0x0000000000000000-mapping.dmp

  • memory/1696-70-0x00000000002F0000-0x000000000030C000-memory.dmp

    Filesize

    112KB

  • memory/1748-60-0x0000000000000000-mapping.dmp

  • memory/2028-59-0x0000000000000000-mapping.dmp