Analysis

  • max time kernel
    135s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 12:06

General

  • Target

    INVOICE9.exe

  • Size

    550KB

  • MD5

    005f4b79b9e9fdb2690c8e2db96daa7d

  • SHA1

    3a5235d9f3d7c048d569d2bfea64954c71be95a8

  • SHA256

    88ac38fd4d4a5bff6e2f09c5071b6b8d654e2d65da6662c02d14fabb32047ca7

  • SHA512

    541993e59dd90af133dffc4df7b10fd7889cd59e852f5fd3f5388cc2e87ff0883f4f5fdda523b7ac45f50860be7bd42526a7ce30ef493a877947af7cbb819bfb

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    ftp
  • Host:
    ftp://asnbanknl.com/
  • Port:
    21
  • Username:
    smartpips
  • Password:
    3mPf4$l2

  • Protocol:
    ftp
  • Host:
    ftp://asnbanknl.com/
  • Port:
    21
  • Username:
    smartpips
  • Password:
    3mPf4$l2

Signatures

  • AgentTesla

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

  • AgentTesla Payload 6 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

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

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 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\INVOICE9.exe
    "C:\Users\Admin\AppData\Local\Temp\INVOICE9.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1960
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\nLAgnrQTnlHGEV" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9A3E.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1284
    • C:\Users\Admin\AppData\Local\Temp\INVOICE9.exe
      "{path}"
      2⤵
        PID:1792
      • C:\Users\Admin\AppData\Local\Temp\INVOICE9.exe
        "{path}"
        2⤵
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • outlook_office_path
        • outlook_win_path
        PID:960

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scheduled Task

    1
    T1053

    Persistence

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Credential Access

    Credentials in Files

    3
    T1081

    Discovery

    System Information Discovery

    1
    T1082

    Collection

    Data from Local System

    3
    T1005

    Email Collection

    1
    T1114

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmp9A3E.tmp
      Filesize

      1KB

      MD5

      db1572d148eff7fa0563002b7d7dd54f

      SHA1

      b848c3a84d01466ccf06d55e16abe02adc9b07dc

      SHA256

      1037cc34508787ce64aa65bd78ac2e68491e837c757e3f533aea3ce30688441d

      SHA512

      92bf000e6ca0770c29e9f968155ac89ebfcc0c90252496904d80eedc3adbefe2817092d1d6b86187423e7f23f7ec113e221ab7cad45f21bdeb4e722328179b0c

    • memory/960-65-0x0000000000400000-0x000000000044C000-memory.dmp
      Filesize

      304KB

    • memory/960-60-0x0000000000400000-0x000000000044C000-memory.dmp
      Filesize

      304KB

    • memory/960-61-0x0000000000400000-0x000000000044C000-memory.dmp
      Filesize

      304KB

    • memory/960-63-0x0000000000400000-0x000000000044C000-memory.dmp
      Filesize

      304KB

    • memory/960-64-0x0000000000400000-0x000000000044C000-memory.dmp
      Filesize

      304KB

    • memory/960-66-0x0000000000446A1E-mapping.dmp
    • memory/960-68-0x0000000000400000-0x000000000044C000-memory.dmp
      Filesize

      304KB

    • memory/960-70-0x0000000000400000-0x000000000044C000-memory.dmp
      Filesize

      304KB

    • memory/1284-58-0x0000000000000000-mapping.dmp
    • memory/1960-56-0x0000000000260000-0x0000000000268000-memory.dmp
      Filesize

      32KB

    • memory/1960-57-0x0000000000A30000-0x0000000000A84000-memory.dmp
      Filesize

      336KB

    • memory/1960-55-0x0000000075A61000-0x0000000075A63000-memory.dmp
      Filesize

      8KB

    • memory/1960-54-0x0000000000B10000-0x0000000000BA0000-memory.dmp
      Filesize

      576KB