Analysis

  • max time kernel
    128s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-en-20211014
  • submitted
    19-10-2021 12:40

General

  • Target

    new order 00041221.exe

  • Size

    400KB

  • MD5

    732de5ad320a92c57f1973c02147befe

  • SHA1

    8c1d8475d0800d148448e3380e9e6b7e0ccdc562

  • SHA256

    ab117e0e873dc84ac3c9d5498f5eeae6672a9b999fc59c0cbd66c6591c96ebd4

  • SHA512

    a9231a8327485c2776b9494ef4429412dc7cb10270f7669039814bbcbd3d24c7f6eac8a96bb0021be47840357d5a6d00e654f3fcf2414f75919075095170a5c6

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    us2.smtp.mailhostbox.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    e)cnIdR1

Signatures

  • AgentTesla

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

  • AgentTesla Payload 5 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
  • 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\new order 00041221.exe
    "C:\Users\Admin\AppData\Local\Temp\new order 00041221.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2016
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\hzQYeJgCInuHX" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7FCA.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1220
    • C:\Users\Admin\AppData\Local\Temp\new order 00041221.exe
      "C:\Users\Admin\AppData\Local\Temp\new order 00041221.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:828

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

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

  • memory/828-67-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/828-65-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/828-71-0x0000000004B90000-0x0000000004B91000-memory.dmp
    Filesize

    4KB

  • memory/828-69-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/828-63-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/828-68-0x0000000000436D6E-mapping.dmp
  • memory/828-66-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/828-64-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1220-62-0x0000000000000000-mapping.dmp
  • memory/2016-58-0x0000000004731000-0x0000000004732000-memory.dmp
    Filesize

    4KB

  • memory/2016-61-0x0000000004E40000-0x0000000004E97000-memory.dmp
    Filesize

    348KB

  • memory/2016-56-0x0000000075B71000-0x0000000075B73000-memory.dmp
    Filesize

    8KB

  • memory/2016-54-0x0000000000130000-0x0000000000131000-memory.dmp
    Filesize

    4KB

  • memory/2016-60-0x0000000000540000-0x0000000000548000-memory.dmp
    Filesize

    32KB

  • memory/2016-59-0x0000000004732000-0x0000000004733000-memory.dmp
    Filesize

    4KB

  • memory/2016-57-0x0000000004730000-0x0000000004731000-memory.dmp
    Filesize

    4KB