Analysis

  • max time kernel
    134s
  • max time network
    179s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20/04/2022, 05:14

General

  • Target

    a23452b73a4411048351ea4b33106feb883a70940ad0cc9ed46e2c32f8350d63.exe

  • Size

    1.0MB

  • MD5

    c0ed9bbcff47e00344d20760e249ae66

  • SHA1

    d38438bc727646bccd72bed89428b69753b2178a

  • SHA256

    a23452b73a4411048351ea4b33106feb883a70940ad0cc9ed46e2c32f8350d63

  • SHA512

    8c7b5def759dfeeb2e4d962a419a2f33adfcdb0668be37696eda9fe5ae81752a43b41b3415fb4a5c2be496f7c471a70be0725dd6f50725e86c9e666fec70eef7

Malware Config

Signatures

  • MassLogger

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

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

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

  • Loads dropped DLL 1 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 42 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 25 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a23452b73a4411048351ea4b33106feb883a70940ad0cc9ed46e2c32f8350d63.exe
    "C:\Users\Admin\AppData\Local\Temp\a23452b73a4411048351ea4b33106feb883a70940ad0cc9ed46e2c32f8350d63.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:816
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v batt /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\Music\batt.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4288
      • C:\Windows\SysWOW64\reg.exe
        REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v batt /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\Music\batt.exe"
        3⤵
        • Adds Run key to start application
        PID:2272
    • C:\Users\Admin\Music\batt.exe
      "C:\Users\Admin\Music\batt.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2496
      • C:\Users\Admin\Music\batt.exe
        "C:\Users\Admin\Music\batt.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:2364

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\batt.exe.log

    Filesize

    1KB

    MD5

    769d8660bec929b34823b17aa9a84297

    SHA1

    d4c40a5a6bc25d4bfd4c7442fbebfa1255cd322f

    SHA256

    19cb9087c56aeccc56ec96363dfe7128b651d7c450c81e453e2e29f3fabf8da3

    SHA512

    2b16f6d92a616b26a06c196c4a123d2959e626f97d328cb69e11e3715e71aa083f66083f68a90ac85e2bccb6e963eac5173dda1023fe5c64f45d78a8c38f2883

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

    Filesize

    94KB

    MD5

    14ff402962ad21b78ae0b4c43cd1f194

    SHA1

    f8a510eb26666e875a5bdd1cadad40602763ad72

    SHA256

    fb9646cb956945bdc503e69645f6b5316d3826b780d3c36738d6b944e884d15b

    SHA512

    daa7a08bf3709119a944bce28f6ebdd24e54a22b18cd9f86a87873e958df121a3881dcdd5e162f6b4e543238c7aef20f657c9830df01d4c79290f7c9a4fcc54b

  • C:\Users\Admin\Music\batt.exe

    Filesize

    1.0MB

    MD5

    c0ed9bbcff47e00344d20760e249ae66

    SHA1

    d38438bc727646bccd72bed89428b69753b2178a

    SHA256

    a23452b73a4411048351ea4b33106feb883a70940ad0cc9ed46e2c32f8350d63

    SHA512

    8c7b5def759dfeeb2e4d962a419a2f33adfcdb0668be37696eda9fe5ae81752a43b41b3415fb4a5c2be496f7c471a70be0725dd6f50725e86c9e666fec70eef7

  • C:\Users\Admin\Music\batt.exe

    Filesize

    1.0MB

    MD5

    c0ed9bbcff47e00344d20760e249ae66

    SHA1

    d38438bc727646bccd72bed89428b69753b2178a

    SHA256

    a23452b73a4411048351ea4b33106feb883a70940ad0cc9ed46e2c32f8350d63

    SHA512

    8c7b5def759dfeeb2e4d962a419a2f33adfcdb0668be37696eda9fe5ae81752a43b41b3415fb4a5c2be496f7c471a70be0725dd6f50725e86c9e666fec70eef7

  • C:\Users\Admin\Music\batt.exe

    Filesize

    1.0MB

    MD5

    c0ed9bbcff47e00344d20760e249ae66

    SHA1

    d38438bc727646bccd72bed89428b69753b2178a

    SHA256

    a23452b73a4411048351ea4b33106feb883a70940ad0cc9ed46e2c32f8350d63

    SHA512

    8c7b5def759dfeeb2e4d962a419a2f33adfcdb0668be37696eda9fe5ae81752a43b41b3415fb4a5c2be496f7c471a70be0725dd6f50725e86c9e666fec70eef7

  • memory/816-131-0x0000000005560000-0x0000000005B04000-memory.dmp

    Filesize

    5.6MB

  • memory/816-130-0x0000000000440000-0x0000000000546000-memory.dmp

    Filesize

    1.0MB

  • memory/816-133-0x0000000005050000-0x00000000050E2000-memory.dmp

    Filesize

    584KB

  • memory/816-132-0x0000000004EE0000-0x0000000004F24000-memory.dmp

    Filesize

    272KB

  • memory/2364-148-0x0000000006500000-0x000000000650A000-memory.dmp

    Filesize

    40KB

  • memory/2364-145-0x00000000005B0000-0x0000000000636000-memory.dmp

    Filesize

    536KB

  • memory/2364-146-0x0000000005C90000-0x0000000005CF6000-memory.dmp

    Filesize

    408KB

  • memory/2364-147-0x00000000064B0000-0x0000000006500000-memory.dmp

    Filesize

    320KB

  • memory/2364-149-0x0000000006730000-0x00000000067CC000-memory.dmp

    Filesize

    624KB

  • memory/2496-140-0x0000000072EF0000-0x0000000072F79000-memory.dmp

    Filesize

    548KB