Analysis

  • max time kernel
    138s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 00:12

General

  • Target

    UXeLnG40fQKjVMO.exe

  • Size

    564KB

  • MD5

    317e3a35af7cf8c2084ee8d996fa5af5

  • SHA1

    cb1ef60d0971c53ddb36240886797e8a14155d7c

  • SHA256

    6b6c3c4778e2ace06259417b71dee51867d17fcc1a23ac4c779fc83b08c853ec

  • SHA512

    ac05e610858a855f8fccef5dc4bc2beda07cd71c7c09725c07798533c9f4280b3eaa15ae6b428e500c1c9e2d90a633903c34298216a07ab066b08652c6d6520c

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    kelechi12

Signatures

  • AgentTesla

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

  • AgentTesla Payload 6 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\UXeLnG40fQKjVMO.exe
    "C:\Users\Admin\AppData\Local\Temp\UXeLnG40fQKjVMO.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1116
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\dXsGjw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7EE.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1456
    • C:\Users\Admin\AppData\Local\Temp\UXeLnG40fQKjVMO.exe
      "{path}"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • outlook_office_path
      • outlook_win_path
      PID:1696

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\Temp\tmp7EE.tmp
    Filesize

    1KB

    MD5

    2f20740a32c79c946096209481bab43a

    SHA1

    cf1f826eb4e644446c1130a29b83ca788ba9f0c9

    SHA256

    4d7457299c1aed454be28e16d3178d43c59d0842b3f14f475e6c7d9532fe1b5d

    SHA512

    e048653748f49dc97f97707aec3860cb48d5bd25830d7d86d5e061be3b41344c20d4aba8bea2452401cd269d3a42458cd4dd95481000ad1d8ec15d8b85c8b4d9

  • memory/1116-57-0x0000000004F60000-0x0000000004FC2000-memory.dmp
    Filesize

    392KB

  • memory/1116-56-0x0000000000520000-0x0000000000530000-memory.dmp
    Filesize

    64KB

  • memory/1116-54-0x0000000000FF0000-0x0000000001084000-memory.dmp
    Filesize

    592KB

  • memory/1116-58-0x00000000050E0000-0x000000000512C000-memory.dmp
    Filesize

    304KB

  • memory/1116-55-0x00000000755C1000-0x00000000755C3000-memory.dmp
    Filesize

    8KB

  • memory/1456-59-0x0000000000000000-mapping.dmp
  • memory/1696-62-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1696-61-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1696-64-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1696-65-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1696-66-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1696-67-0x0000000000446F8E-mapping.dmp
  • memory/1696-69-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1696-71-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB