Analysis

  • max time kernel
    151s
  • max time network
    137s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    19-10-2021 09:53

General

  • Target

    699adf49daa7dbd1e4bd58f741415d68148ad899.exe

  • Size

    888KB

  • MD5

    2659cfdc90835a44bdd248353adff686

  • SHA1

    699adf49daa7dbd1e4bd58f741415d68148ad899

  • SHA256

    1e3fba0ca8ada098611e59200a6f26d8c0b966f54aab1cc48991f8eb62f604eb

  • SHA512

    fdb2388131b0298fe59f529b4611ba6bb7698e89376a9e61bfc6e14580b3a9d59c74024520d7a30daf05ce04fff34dffbf064bc72bed27b58f94cfa857c076db

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.mail.ru
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    ykfSLYm2bvv69WJZjZtc

Signatures

  • AgentTesla

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

  • AgentTesla Payload 2 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
  • Adds Run key to start application 2 TTPs 1 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 WriteProcessMemory 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\699adf49daa7dbd1e4bd58f741415d68148ad899.exe
    "C:\Users\Admin\AppData\Local\Temp\699adf49daa7dbd1e4bd58f741415d68148ad899.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1828
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\UaOAjKXIDhF" /XML "C:\Users\Admin\AppData\Local\Temp\tmp61D3.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:736
    • C:\Users\Admin\AppData\Local\Temp\699adf49daa7dbd1e4bd58f741415d68148ad899.exe
      "{path}"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:3816

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

1
T1112

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\Microsoft\CLR_v4.0_32\UsageLogs\699adf49daa7dbd1e4bd58f741415d68148ad899.exe.log
    MD5

    90acfd72f14a512712b1a7380c0faf60

    SHA1

    40ba4accb8faa75887e84fb8e38d598dc8cf0f12

    SHA256

    20806822f0c130b340504132c1461b589261fbbc518e468f4f90733ab514cb86

    SHA512

    29dbf85e14e60868574cb4dc9bda83d3c229fb956733d8d2557f2475ee0e690ac9c2e72f31e02284996da6906ba2dbfa382a29b04c15a2406571d8ee19ad16b9

  • C:\Users\Admin\AppData\Local\Temp\tmp61D3.tmp
    MD5

    d60e0a72e2e6f45c9aeef9c26d2546d7

    SHA1

    281edfc4642e870c3978d7af79297a0f6918e7cc

    SHA256

    6ad2800bd4fdeacd4b9614efd8be059d3801b677a1f400e24338dd219e9870de

    SHA512

    1a92c0871de2ad6ea221fec56ef1e32f1e86fd2eb6afa98d4fe605ff0e613b4c796adbc800333a41cdd51d6ccfbd6589b2cd9721f816b54c3b41e39bbd428a1b

  • memory/736-126-0x0000000000000000-mapping.dmp
  • memory/1828-124-0x0000000008A60000-0x0000000008ADE000-memory.dmp
    Filesize

    504KB

  • memory/1828-119-0x0000000004F10000-0x0000000004F11000-memory.dmp
    Filesize

    4KB

  • memory/1828-121-0x0000000004DF0000-0x0000000004DF1000-memory.dmp
    Filesize

    4KB

  • memory/1828-122-0x00000000050D0000-0x00000000050D1000-memory.dmp
    Filesize

    4KB

  • memory/1828-123-0x0000000005160000-0x000000000516E000-memory.dmp
    Filesize

    56KB

  • memory/1828-115-0x0000000000500000-0x0000000000501000-memory.dmp
    Filesize

    4KB

  • memory/1828-125-0x000000000B270000-0x000000000B2A8000-memory.dmp
    Filesize

    224KB

  • memory/1828-120-0x0000000004F10000-0x000000000540E000-memory.dmp
    Filesize

    5.0MB

  • memory/1828-118-0x0000000005410000-0x0000000005411000-memory.dmp
    Filesize

    4KB

  • memory/1828-117-0x0000000004E70000-0x0000000004E71000-memory.dmp
    Filesize

    4KB

  • memory/3816-129-0x0000000000436E6E-mapping.dmp
  • memory/3816-128-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/3816-135-0x0000000005270000-0x0000000005271000-memory.dmp
    Filesize

    4KB

  • memory/3816-136-0x00000000052C0000-0x00000000052C1000-memory.dmp
    Filesize

    4KB

  • memory/3816-137-0x0000000005EF0000-0x0000000005EF1000-memory.dmp
    Filesize

    4KB

  • memory/3816-140-0x0000000005271000-0x0000000005272000-memory.dmp
    Filesize

    4KB