Analysis

  • max time kernel
    121s
  • max time network
    141s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    19-10-2021 06:07

General

  • Target

    Purchase Inquiry_pdf.exe

  • Size

    588KB

  • MD5

    a2c76f1d92fa89671867f90986a86a87

  • SHA1

    856585e784b7280d136b8129553aa0ad92a8ea3d

  • SHA256

    55aed03e89170a5d23ecff52a4f5a8ea81fa921aa37d19c3d807c7b2078cf3a2

  • SHA512

    2532fb9a3a29e473d3b5d33eae522c075b5f4a9ab77f1e8937901834c0bfb9beaf1b1e0d3bb25d9fb0ffb3bfaf9b1b3c3c4dce64e2a9be1c8f309721c2d457f4

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot2046248941:AAG5Z0PyWwtApmPaysBm59voK10ec9Rgnaw/sendDocument

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
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Purchase Inquiry_pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Purchase Inquiry_pdf.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2032
    • C:\Users\Admin\AppData\Local\Temp\Purchase Inquiry_pdf.exe
      "C:\Users\Admin\AppData\Local\Temp\Purchase Inquiry_pdf.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:772

Network

MITRE ATT&CK Matrix ATT&CK v6

Credential Access

Credentials in Files

2
T1081

Collection

Data from Local System

2
T1005

Email Collection

1
T1114

Replay Monitor

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Downloads

  • memory/772-58-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/772-59-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/772-60-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/772-61-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/772-62-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/772-63-0x0000000000436D2E-mapping.dmp
  • memory/772-64-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/772-66-0x0000000004990000-0x0000000004991000-memory.dmp
    Filesize

    4KB

  • memory/2032-53-0x0000000000360000-0x0000000000361000-memory.dmp
    Filesize

    4KB

  • memory/2032-55-0x0000000000540000-0x0000000000541000-memory.dmp
    Filesize

    4KB

  • memory/2032-56-0x0000000000410000-0x0000000000418000-memory.dmp
    Filesize

    32KB

  • memory/2032-57-0x0000000000A30000-0x0000000000A87000-memory.dmp
    Filesize

    348KB