Analysis

  • max time kernel
    137s
  • max time network
    145s
  • platform
    windows10_x64
  • resource
    win10-en
  • submitted
    15-09-2021 07:10

General

  • Target

    Purchase_Inquiry_pdf.exe

  • Size

    552KB

  • MD5

    5fc50cecdc7da2761f4ccce4b2c1362f

  • SHA1

    536420b712568d288112f7f38c4e79792be0c107

  • SHA256

    107c8bfec5d8a4e23c429692da4204025bb77fe71ff6b56a6804f5f19dc820c1

  • SHA512

    d0e3660d667eeeb800d305516be5fab496e9ea8aaccb271867c4de41a74298b2031424dbc5aca211aa4f30f9e739923dfa9cd124ea8392f174588d6358aefce0

Malware Config

Extracted

Family

agenttesla

C2

http://bot.statusupdate.one/webpanel-charles/mawa/e22cc3544e8953ec6191.php

Signatures

  • AgentTesla

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

  • AgentTesla Payload 2 IoCs
  • Drops file in Drivers directory 1 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.

  • 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 1 IoCs
  • Suspicious use of WriteProcessMemory 11 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 behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4044
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\TSyRBCYa" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBA4D.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:3216
    • C:\Users\Admin\AppData\Local\Temp\Purchase_Inquiry_pdf.exe
      "C:\Users\Admin\AppData\Local\Temp\Purchase_Inquiry_pdf.exe"
      2⤵
      • Drops file in Drivers directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:2540

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

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Purchase_Inquiry_pdf.exe.log
    MD5

    0c2899d7c6746f42d5bbe088c777f94c

    SHA1

    622f66c5f7a3c91b28a9f43ce7c6cabadbf514f1

    SHA256

    5b0b99740cadaeff7b9891136644b396941547e20cc7eea646560d0dad5a5458

    SHA512

    ab7a3409ed4b6ca00358330a3aa4ef6de7d81eb21a5e24bb629ef6a7c7c4e2a70ca3accfbc989ed6e495fdb8eb6203a26d6f2a37b2a5809af4276af375b49078

  • memory/2540-135-0x0000000005E70000-0x0000000005E71000-memory.dmp
    Filesize

    4KB

  • memory/2540-134-0x00000000056C0000-0x00000000056C1000-memory.dmp
    Filesize

    4KB

  • memory/2540-133-0x0000000005250000-0x0000000005251000-memory.dmp
    Filesize

    4KB

  • memory/2540-127-0x000000000043771E-mapping.dmp
  • memory/2540-126-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/3216-125-0x0000000000000000-mapping.dmp
  • memory/4044-120-0x0000000004B80000-0x0000000004B81000-memory.dmp
    Filesize

    4KB

  • memory/4044-124-0x0000000007C50000-0x0000000007C88000-memory.dmp
    Filesize

    224KB

  • memory/4044-123-0x00000000056D0000-0x000000000572C000-memory.dmp
    Filesize

    368KB

  • memory/4044-122-0x0000000004B90000-0x0000000004B97000-memory.dmp
    Filesize

    28KB

  • memory/4044-121-0x0000000004C60000-0x0000000004C61000-memory.dmp
    Filesize

    4KB

  • memory/4044-115-0x0000000000150000-0x0000000000151000-memory.dmp
    Filesize

    4KB

  • memory/4044-119-0x0000000002520000-0x00000000025B2000-memory.dmp
    Filesize

    584KB

  • memory/4044-118-0x0000000004A20000-0x0000000004A21000-memory.dmp
    Filesize

    4KB

  • memory/4044-117-0x00000000050C0000-0x00000000050C1000-memory.dmp
    Filesize

    4KB