Overview

overview

8

Static

static

8

IRS_form_3690735.xls

windows7_x64

6

IRS_form_3690735.xls

windows10_x64

6

Analysis

  • max time kernel
    136s
  • max time network
    132s
  • platform
    windows10_x64
  • resource
    win10v200430
  • submitted
    08-07-2020 05:42

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Report Analysis Logs

General

  • Target

    IRS_form_3690735.xls

  • Size

    78KB

  • MD5

    85d0e857f338ce777927f0e3fda149d5

  • SHA1

    88d866392071f68237bbf46110c9d20f5c5eb9f7

  • SHA256

    7e3638d120694383935bb8b66f6e20fd9cfb2902d7865a4d8eb6d751175579ba

  • SHA512

    74b5c8c8dbf7eef921da24e95059a13a0944e8f8df1429e0734b6fb9bc179890c5c197d5a31fbe379183917da04f986718c41c4b5db9cb8c65fe34a43a3d727f

Score
6/10

Malware Config

Signatures

  • Process spawned suspicious child process 1 IoCs

    This child process is typically not spawned unless (for example) the parent process crashes. This typically indicates the parent process was unsuccessfully compromised.

  • Suspicious use of WriteProcessMemory 4 IoCs
  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious use of SetWindowsHookEx 8 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes

  • C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
    "C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\IRS_form_3690735.xls"
    1⤵
    • Suspicious use of WriteProcessMemory
    • Checks processor information in registry
    • Enumerates system info in registry
    • Suspicious use of SetWindowsHookEx
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    PID:3848
    • C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\DW\DW20.EXE
      "C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\DW\DW20.EXE" -x -s 4528
      2⤵
      • Process spawned suspicious child process
      • Suspicious use of WriteProcessMemory
      PID:3500
      • C:\Windows\system32\dwwin.exe
        C:\Windows\system32\dwwin.exe -x -s 4528
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:3580

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • memory/3500-0-0x0000000000000000-mapping.dmp
    Download
  • memory/3580-1-0x0000000000000000-mapping.dmp
    Download
  • memory/3580-2-0x000001B77DFF0000-0x000001B77DFF1000-memory.dmp
    Filesize

    4KB

    Download
  • memory/3580-3-0x000001B700880000-0x000001B700881000-memory.dmp
    Filesize

    4KB

    Download
  • memory/3580-4-0x000001B700880000-0x000001B700881000-memory.dmp
    Filesize

    4KB

    Download
  • memory/3580-6-0x000001B700C80000-0x000001B700C81000-memory.dmp
    Filesize

    4KB

    Download
  • memory/3580-8-0x000001B700B60000-0x000001B700B61000-memory.dmp
    Filesize

    4KB

    Download
  • memory/3580-9-0x000001B700B60000-0x000001B700B61000-memory.dmp
    Filesize

    4KB

    Download
  • memory/3580-10-0x000001B700B60000-0x000001B700B61000-memory.dmp
    Filesize

    4KB

    Download