Analysis

  • max time kernel
    177s
  • max time network
    171s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 02:05

General

  • Target

    img_0933.exe

  • Size

    1.4MB

  • MD5

    f8d0bab3e3367fbd94c1f82eb33714e7

  • SHA1

    e457ae2ad469dd932300a02a4e3b9c03010d5e31

  • SHA256

    cc6b0848a3a848c9ee7ce3f63d1e3f95393f6593140e2aab400146c06e593793

  • SHA512

    0064460f534399a26e4dd2e29804c3f8b7cd3d8b97808a9ae713c6e7eed0facd621ed3d98f3dad1b655ed051e069fbb9e513b1d51d0ccf61bfde30f668c65784

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\AEF946DCB4\Log.txt

Family

masslogger

Ransom Note
<|| v2.1.0.0 ||> User Name: Admin IP: 154.61.71.50 Location: United States Windows OS: Microsoft Windows 7 Ultimate 64bit Windows Serial Key: D4F6K-QK3RD-TMVMJ-BBMRX-3MBMV CPU: Intel Core Processor (Broadwell) GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 5:08:21 AM MassLogger Started: 5/21/2022 5:08:10 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\RegAsm.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| USB Spread ||> Disabled <|| Downloader ||> Disabled <|| Window Searcher ||> Disabled <|| Bot Killer ||> Disabled <|| Search And Upload ||> Disabled <|| Telegram Desktop ||> Not Installed <|| Pidgin ||> Not Installed <|| FileZilla ||> Not Installed <|| Discord Tokken ||> Not Installed <|| NordVPN ||> Not Installed <|| Outlook ||> Not Installed <|| FoxMail ||> Not Installed <|| Thunderbird ||> Not Installed <|| FireFox ||> Not Found <|| QQ Browser ||> Not Installed <|| Chromium Recovery ||> Not Installed or Not Found <|| Keylogger And Clipboard ||> Disabled

Signatures

  • MassLogger

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

  • MassLogger Main Payload 11 IoCs
  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • 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 3 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: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\img_0933.exe
    "C:\Users\Admin\AppData\Local\Temp\img_0933.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:908
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\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:1996
      • 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:2000
    • 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:300
      • C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
        "C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Loads dropped DLL
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:1428

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    Filesize

    63KB

    MD5

    b58b926c3574d28d5b7fdd2ca3ec30d5

    SHA1

    d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

    SHA256

    6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

    SHA512

    b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

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

    Filesize

    63KB

    MD5

    b58b926c3574d28d5b7fdd2ca3ec30d5

    SHA1

    d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

    SHA256

    6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

    SHA512

    b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

  • C:\Users\Admin\Desktop\.exe

    Filesize

    1.4MB

    MD5

    f8d0bab3e3367fbd94c1f82eb33714e7

    SHA1

    e457ae2ad469dd932300a02a4e3b9c03010d5e31

    SHA256

    cc6b0848a3a848c9ee7ce3f63d1e3f95393f6593140e2aab400146c06e593793

    SHA512

    0064460f534399a26e4dd2e29804c3f8b7cd3d8b97808a9ae713c6e7eed0facd621ed3d98f3dad1b655ed051e069fbb9e513b1d51d0ccf61bfde30f668c65784

  • C:\Users\Admin\Desktop\.exe

    Filesize

    1.4MB

    MD5

    f8d0bab3e3367fbd94c1f82eb33714e7

    SHA1

    e457ae2ad469dd932300a02a4e3b9c03010d5e31

    SHA256

    cc6b0848a3a848c9ee7ce3f63d1e3f95393f6593140e2aab400146c06e593793

    SHA512

    0064460f534399a26e4dd2e29804c3f8b7cd3d8b97808a9ae713c6e7eed0facd621ed3d98f3dad1b655ed051e069fbb9e513b1d51d0ccf61bfde30f668c65784

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

    Filesize

    63KB

    MD5

    b58b926c3574d28d5b7fdd2ca3ec30d5

    SHA1

    d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

    SHA256

    6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

    SHA512

    b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

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

    Filesize

    63KB

    MD5

    b58b926c3574d28d5b7fdd2ca3ec30d5

    SHA1

    d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

    SHA256

    6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

    SHA512

    b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

  • \Users\Admin\Desktop\.exe

    Filesize

    1.4MB

    MD5

    f8d0bab3e3367fbd94c1f82eb33714e7

    SHA1

    e457ae2ad469dd932300a02a4e3b9c03010d5e31

    SHA256

    cc6b0848a3a848c9ee7ce3f63d1e3f95393f6593140e2aab400146c06e593793

    SHA512

    0064460f534399a26e4dd2e29804c3f8b7cd3d8b97808a9ae713c6e7eed0facd621ed3d98f3dad1b655ed051e069fbb9e513b1d51d0ccf61bfde30f668c65784

  • memory/300-60-0x0000000000000000-mapping.dmp

  • memory/300-63-0x0000000001280000-0x00000000013E0000-memory.dmp

    Filesize

    1.4MB

  • memory/300-64-0x0000000000450000-0x000000000045A000-memory.dmp

    Filesize

    40KB

  • memory/908-54-0x0000000000A00000-0x0000000000B60000-memory.dmp

    Filesize

    1.4MB

  • memory/908-56-0x00000000005B0000-0x00000000005BA000-memory.dmp

    Filesize

    40KB

  • memory/908-55-0x00000000004C0000-0x00000000004DE000-memory.dmp

    Filesize

    120KB

  • memory/1428-78-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1428-71-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1428-67-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1428-70-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1428-72-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1428-83-0x00000000007A0000-0x00000000007B4000-memory.dmp

    Filesize

    80KB

  • memory/1428-73-0x000000000049449E-mapping.dmp

  • memory/1428-82-0x00000000002B5000-0x00000000002C6000-memory.dmp

    Filesize

    68KB

  • memory/1428-76-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1428-79-0x0000000075581000-0x0000000075583000-memory.dmp

    Filesize

    8KB

  • memory/1428-68-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1428-81-0x0000000000620000-0x0000000000664000-memory.dmp

    Filesize

    272KB

  • memory/1996-57-0x0000000000000000-mapping.dmp

  • memory/2000-58-0x0000000000000000-mapping.dmp