Analysis

  • max time kernel
    144s
  • max time network
    50s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 12:45

General

  • Target

    Receipt.exe

  • Size

    5.1MB

  • MD5

    4d37240c2a9aab1b8dfd0aee7d418adc

  • SHA1

    fb684fe749432d7fb74e95a26f6614362c9b26b2

  • SHA256

    9013e308218b70c038971d37c9ab446b81108079344e71f25e1d131487657c97

  • SHA512

    5e84c6ff15e51d044c68b01b371b94a00d9d3806ff3bb9cad2aa4446f0f14c79cd95228f13601b88b980152eb4c85f9c0a65eed09034489062d68e93afd7d5ea

Malware Config

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • AgentTesla Payload 6 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • 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 3 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • 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 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Receipt.exe
    "C:\Users\Admin\AppData\Local\Temp\Receipt.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1660
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v cash /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\Desktop\bvn.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:912
      • C:\Windows\SysWOW64\reg.exe
        REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v cash /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\Desktop\bvn.exe"
        3⤵
        • Adds Run key to start application
        PID:1004
    • C:\Users\Admin\Desktop\bvn.exe
      "C:\Users\Admin\Desktop\bvn.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:848
      • C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
        "C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • outlook_office_path
        • outlook_win_path
        PID:1676

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

2
T1081

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

2
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

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\bvn.exe
    Filesize

    5.1MB

    MD5

    4d37240c2a9aab1b8dfd0aee7d418adc

    SHA1

    fb684fe749432d7fb74e95a26f6614362c9b26b2

    SHA256

    9013e308218b70c038971d37c9ab446b81108079344e71f25e1d131487657c97

    SHA512

    5e84c6ff15e51d044c68b01b371b94a00d9d3806ff3bb9cad2aa4446f0f14c79cd95228f13601b88b980152eb4c85f9c0a65eed09034489062d68e93afd7d5ea

  • C:\Users\Admin\Desktop\bvn.exe
    Filesize

    5.1MB

    MD5

    4d37240c2a9aab1b8dfd0aee7d418adc

    SHA1

    fb684fe749432d7fb74e95a26f6614362c9b26b2

    SHA256

    9013e308218b70c038971d37c9ab446b81108079344e71f25e1d131487657c97

    SHA512

    5e84c6ff15e51d044c68b01b371b94a00d9d3806ff3bb9cad2aa4446f0f14c79cd95228f13601b88b980152eb4c85f9c0a65eed09034489062d68e93afd7d5ea

  • \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

  • memory/848-57-0x0000000000000000-mapping.dmp
  • memory/848-60-0x0000000001090000-0x00000000015A6000-memory.dmp
    Filesize

    5.1MB

  • memory/912-55-0x0000000000000000-mapping.dmp
  • memory/1004-56-0x0000000000000000-mapping.dmp
  • memory/1660-54-0x0000000001070000-0x0000000001586000-memory.dmp
    Filesize

    5.1MB

  • memory/1676-67-0x0000000000400000-0x0000000000450000-memory.dmp
    Filesize

    320KB

  • memory/1676-66-0x0000000000400000-0x0000000000450000-memory.dmp
    Filesize

    320KB

  • memory/1676-68-0x0000000000400000-0x0000000000450000-memory.dmp
    Filesize

    320KB

  • memory/1676-69-0x000000000044B84E-mapping.dmp
  • memory/1676-64-0x0000000000400000-0x0000000000450000-memory.dmp
    Filesize

    320KB

  • memory/1676-72-0x0000000000400000-0x0000000000450000-memory.dmp
    Filesize

    320KB

  • memory/1676-74-0x0000000000400000-0x0000000000450000-memory.dmp
    Filesize

    320KB

  • memory/1676-75-0x0000000076781000-0x0000000076783000-memory.dmp
    Filesize

    8KB

  • memory/1676-63-0x0000000000400000-0x0000000000450000-memory.dmp
    Filesize

    320KB