Analysis

  • max time kernel
    136s
  • max time network
    79s
  • platform
    windows10_x64
  • resource
    win10v200430
  • submitted
    07-07-2020 09:45

General

  • Target

    Revised PO# 453924.exe

  • Size

    775KB

  • MD5

    9943384ae07ee24b27111dcfa3ad3f28

  • SHA1

    d05c756801a33f30c8c8c54c2513590a7ae56e97

  • SHA256

    345f849a0cfc012229e71b4c53ff148b9cadaecd692f624f917e35dfed7f820b

  • SHA512

    6a1944d0807e2646a4909a16d0ab9fce1d4cc74a1d90e7485172600580a83157bed1941929808b2dbfabfa7e90007ea4624d61af406326682a3a1f9244863176

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.hk-gruop-sg.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    YERuFGp7

Signatures

  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • UPX packed file 3 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run entry to start application 2 TTPs 1 IoCs
  • AgentTesla

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 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.

  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Revised PO# 453924.exe
    "C:\Users\Admin\AppData\Local\Temp\Revised PO# 453924.exe"
    1⤵
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3180
    • C:\Users\Admin\AppData\Local\Temp\Revised PO# 453924.exe
      "C:\Users\Admin\AppData\Local\Temp\Revised PO# 453924.exe"
      2⤵
      • Suspicious behavior: RenamesItself
      • Adds Run entry to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3932

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Collection

Data from Local System

3
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/3932-0-0x0000000000400000-0x00000000004A4000-memory.dmp
    Filesize

    656KB

  • memory/3932-1-0x00000000004A27B0-mapping.dmp
  • memory/3932-2-0x0000000000400000-0x00000000004A4000-memory.dmp
    Filesize

    656KB

  • memory/3932-3-0x0000000000400000-0x00000000004A4000-memory.dmp
    Filesize

    656KB

  • memory/3932-4-0x0000000002170000-0x00000000021BC000-memory.dmp
    Filesize

    304KB

  • memory/3932-5-0x00000000021E2000-0x00000000021E3000-memory.dmp
    Filesize

    4KB