Analysis

  • max time kernel
    138s
  • max time network
    143s
  • platform
    windows10_x64
  • resource
    win10-ja-20210920
  • submitted
    22-10-2021 05:29

General

  • Target

    支払い命令.exe

  • Size

    541KB

  • MD5

    f5fabfdc406897f2026193d2c50f9e33

  • SHA1

    57c68b743c7f80c2365ddfff0e0c2253b2cc0628

  • SHA256

    b64a7759ecf0ee5e886d56faa7dc557f0a1b06f63c39cc2f96feb1e8dd150c94

  • SHA512

    222e882cb32c25998888dfbb4f9c415ff69ce285fabb8ffdc1a3dc0f7ec7210b46cdf751b39c7e75bd3a7280f85f1997d25c528feaef0b7f48c355aa4d35724d

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.gmail.com
  • Port:
    587
  • Username:
    soceanwave244@gmail.com
  • Password:
    baorhihusmusqbnx

Signatures

  • AgentTesla

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

  • Registers COM server for autorun 1 TTPs
  • AgentTesla Payload 3 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
  • Drops file in System32 directory 4 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Modifies data under HKEY_USERS 23 IoCs
  • Modifies registry class 44 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\支払い命令.exe
    "C:\Users\Admin\AppData\Local\Temp\支払い命令.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:516
    • C:\Users\Admin\AppData\Local\Temp\支払い命令.exe
      "C:\Users\Admin\AppData\Local\Temp\支払い命令.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:2272
  • C:\Users\Admin\AppData\Local\Microsoft\OneDrive\21.196.0921.0007\FileSyncConfig.exe
    "C:\Users\Admin\AppData\Local\Microsoft\OneDrive\21.196.0921.0007\FileSyncConfig.exe"
    1⤵
    • Modifies registry class
    PID:3084
  • C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeC2RClient.exe
    "C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeC2RClient.exe" /frequentupdate SCHEDULEDTASK displaylevel=False
    1⤵
    • Drops file in System32 directory
    • Modifies data under HKEY_USERS
    • Suspicious use of SetWindowsHookEx
    PID:1660

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Credential Access

Credentials in Files

3
T1081

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/516-115-0x0000000000FC0000-0x0000000000FC1000-memory.dmp
    Filesize

    4KB

  • memory/516-117-0x0000000005FD0000-0x0000000005FD1000-memory.dmp
    Filesize

    4KB

  • memory/516-118-0x00000000059E0000-0x00000000059E1000-memory.dmp
    Filesize

    4KB

  • memory/516-119-0x00000000059C0000-0x00000000059C1000-memory.dmp
    Filesize

    4KB

  • memory/516-120-0x0000000005AD0000-0x0000000005FCE000-memory.dmp
    Filesize

    5.0MB

  • memory/516-121-0x0000000005FC0000-0x0000000005FC7000-memory.dmp
    Filesize

    28KB

  • memory/516-122-0x00000000096E0000-0x00000000096E1000-memory.dmp
    Filesize

    4KB

  • memory/516-123-0x0000000009780000-0x00000000097D8000-memory.dmp
    Filesize

    352KB

  • memory/2272-124-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/2272-125-0x000000000043760E-mapping.dmp
  • memory/2272-130-0x0000000005130000-0x000000000562E000-memory.dmp
    Filesize

    5.0MB

  • memory/2272-131-0x0000000005600000-0x0000000005601000-memory.dmp
    Filesize

    4KB

  • memory/2272-132-0x0000000005CA0000-0x0000000005CA1000-memory.dmp
    Filesize

    4KB

  • memory/2272-133-0x0000000006000000-0x0000000006001000-memory.dmp
    Filesize

    4KB

  • memory/2272-134-0x0000000005E10000-0x0000000005E11000-memory.dmp
    Filesize

    4KB

  • memory/2272-137-0x0000000005130000-0x000000000562E000-memory.dmp
    Filesize

    5.0MB