Analysis

  • max time kernel
    149s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    20-05-2022 23:01

General

  • Target

    doc000643665764.exe

  • Size

    1.4MB

  • MD5

    e04ea3820e1699eb0cce1ddb55b91327

  • SHA1

    736ab206d9bba71557069b42b05b7615b28e5b0f

  • SHA256

    367c31b38577406fec107ed639cc6503710de53d8326b92504fd3919105ffce9

  • SHA512

    64926a6671e9b90a69ffb64f61ae48d59fc61834a5083ae1ad119af711ef04923dfc607ace4bdd4ab2c06e495ee1b84f0399dc0df54b847d201d6770c864167c

Malware Config

Extracted

Path

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

Family

masslogger

Ransom Note
################################################################# MassLogger v1.3.6.0 ################################################################# ### Logger Details ### 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 1:14:39 AM MassLogger Started: 5/21/2022 1:14:28 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: Name:WerFault, Title:Z/z8qH7&G(y2x4)YLm

Signatures

  • MassLogger

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

  • MassLogger Main Payload 41 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 8 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.

  • Program crash 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\doc000643665764.exe
    "C:\Users\Admin\AppData\Local\Temp\doc000643665764.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1992
    • 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:1364
      • 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:1204
    • 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:1172
      • 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
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:1240
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1172 -s 780
        3⤵
        • Loads dropped DLL
        • Program crash
        PID:636

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

    e04ea3820e1699eb0cce1ddb55b91327

    SHA1

    736ab206d9bba71557069b42b05b7615b28e5b0f

    SHA256

    367c31b38577406fec107ed639cc6503710de53d8326b92504fd3919105ffce9

    SHA512

    64926a6671e9b90a69ffb64f61ae48d59fc61834a5083ae1ad119af711ef04923dfc607ace4bdd4ab2c06e495ee1b84f0399dc0df54b847d201d6770c864167c

  • C:\Users\Admin\Desktop\.exe

    Filesize

    1.4MB

    MD5

    e04ea3820e1699eb0cce1ddb55b91327

    SHA1

    736ab206d9bba71557069b42b05b7615b28e5b0f

    SHA256

    367c31b38577406fec107ed639cc6503710de53d8326b92504fd3919105ffce9

    SHA512

    64926a6671e9b90a69ffb64f61ae48d59fc61834a5083ae1ad119af711ef04923dfc607ace4bdd4ab2c06e495ee1b84f0399dc0df54b847d201d6770c864167c

  • \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

    e04ea3820e1699eb0cce1ddb55b91327

    SHA1

    736ab206d9bba71557069b42b05b7615b28e5b0f

    SHA256

    367c31b38577406fec107ed639cc6503710de53d8326b92504fd3919105ffce9

    SHA512

    64926a6671e9b90a69ffb64f61ae48d59fc61834a5083ae1ad119af711ef04923dfc607ace4bdd4ab2c06e495ee1b84f0399dc0df54b847d201d6770c864167c

  • \Users\Admin\Desktop\.exe

    Filesize

    1.4MB

    MD5

    e04ea3820e1699eb0cce1ddb55b91327

    SHA1

    736ab206d9bba71557069b42b05b7615b28e5b0f

    SHA256

    367c31b38577406fec107ed639cc6503710de53d8326b92504fd3919105ffce9

    SHA512

    64926a6671e9b90a69ffb64f61ae48d59fc61834a5083ae1ad119af711ef04923dfc607ace4bdd4ab2c06e495ee1b84f0399dc0df54b847d201d6770c864167c

  • \Users\Admin\Desktop\.exe

    Filesize

    1.4MB

    MD5

    e04ea3820e1699eb0cce1ddb55b91327

    SHA1

    736ab206d9bba71557069b42b05b7615b28e5b0f

    SHA256

    367c31b38577406fec107ed639cc6503710de53d8326b92504fd3919105ffce9

    SHA512

    64926a6671e9b90a69ffb64f61ae48d59fc61834a5083ae1ad119af711ef04923dfc607ace4bdd4ab2c06e495ee1b84f0399dc0df54b847d201d6770c864167c

  • \Users\Admin\Desktop\.exe

    Filesize

    1.4MB

    MD5

    e04ea3820e1699eb0cce1ddb55b91327

    SHA1

    736ab206d9bba71557069b42b05b7615b28e5b0f

    SHA256

    367c31b38577406fec107ed639cc6503710de53d8326b92504fd3919105ffce9

    SHA512

    64926a6671e9b90a69ffb64f61ae48d59fc61834a5083ae1ad119af711ef04923dfc607ace4bdd4ab2c06e495ee1b84f0399dc0df54b847d201d6770c864167c

  • \Users\Admin\Desktop\.exe

    Filesize

    1.4MB

    MD5

    e04ea3820e1699eb0cce1ddb55b91327

    SHA1

    736ab206d9bba71557069b42b05b7615b28e5b0f

    SHA256

    367c31b38577406fec107ed639cc6503710de53d8326b92504fd3919105ffce9

    SHA512

    64926a6671e9b90a69ffb64f61ae48d59fc61834a5083ae1ad119af711ef04923dfc607ace4bdd4ab2c06e495ee1b84f0399dc0df54b847d201d6770c864167c

  • \Users\Admin\Desktop\.exe

    Filesize

    1.4MB

    MD5

    e04ea3820e1699eb0cce1ddb55b91327

    SHA1

    736ab206d9bba71557069b42b05b7615b28e5b0f

    SHA256

    367c31b38577406fec107ed639cc6503710de53d8326b92504fd3919105ffce9

    SHA512

    64926a6671e9b90a69ffb64f61ae48d59fc61834a5083ae1ad119af711ef04923dfc607ace4bdd4ab2c06e495ee1b84f0399dc0df54b847d201d6770c864167c

  • memory/636-82-0x0000000000000000-mapping.dmp

  • memory/1172-61-0x0000000000000000-mapping.dmp

  • memory/1172-64-0x0000000000240000-0x00000000003B8000-memory.dmp

    Filesize

    1.5MB

  • memory/1172-66-0x0000000001F70000-0x0000000001F7A000-memory.dmp

    Filesize

    40KB

  • memory/1204-59-0x0000000000000000-mapping.dmp

  • memory/1240-69-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-121-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-75-0x00000000004ACB9E-mapping.dmp

  • memory/1240-72-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-78-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-80-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-73-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-70-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-604-0x0000000004F95000-0x0000000004FA6000-memory.dmp

    Filesize

    68KB

  • memory/1240-603-0x0000000000670000-0x00000000006B4000-memory.dmp

    Filesize

    272KB

  • memory/1240-137-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-135-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-89-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-91-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-93-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-95-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-97-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-99-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-101-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-103-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-105-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-107-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-109-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-111-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-113-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-115-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-117-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-119-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-74-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-123-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-125-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-127-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-129-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-131-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1240-133-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1364-58-0x0000000000000000-mapping.dmp

  • memory/1992-56-0x0000000000500000-0x0000000000520000-memory.dmp

    Filesize

    128KB

  • memory/1992-57-0x00000000005C0000-0x00000000005CA000-memory.dmp

    Filesize

    40KB

  • memory/1992-55-0x0000000075381000-0x0000000075383000-memory.dmp

    Filesize

    8KB

  • memory/1992-54-0x0000000000B00000-0x0000000000C78000-memory.dmp

    Filesize

    1.5MB