Overview

overview

10

Static

static

10

Umbrella.flv.exe

windows7-x64

8

Umbrella.flv.exe

windows10-2004-x64

8

Analysis

  • max time kernel
    150s
  • max time network
    51s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231130-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231130-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-12-2023 15:54

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General

  • Target

    Umbrella.flv.exe

  • Size

    93KB

  • MD5

    9c8cfc8027b21ff03525c1880ed347c1

  • SHA1

    3565ba9d14ab917ed66625a968bef184089e3c32

  • SHA256

    76231f72576c98527990b748706fd506d2fed084d12ebdc7b4e7952d1859e236

  • SHA512

    dbc67bc5c71bc69010db8fa4d94e574f6b804216236b77af35d0f493230d5049716ed28a25256790ecfec8b33c02ad7f6b57c664c35d1b7dec899495eb089aac

  • SSDEEP

    768:mHY3Oxqctib5nkPQW63m/HsqmGzh+IxvXnKN2tfKkXxrjEtCdnl2pi1Rz4Rk3+ir:ox3iFqHsJE4I15tTjEwzGi1dDPDbgS

Score
8/10
evasion

Malware Config

Signatures

  • Disables Task Manager via registry modification
    evasion
  • Modifies Windows Firewall 1 TTPs 1 IoCs
    evasion
  • Drops startup file 4 IoCs
  • Drops autorun.inf file 1 TTPs 4 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 35 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Umbrella.flv.exe
    "C:\Users\Admin\AppData\Local\Temp\Umbrella.flv.exe"
    1⤵
    • Drops startup file
    • Drops autorun.inf file
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4952
    • C:\Windows\SysWOW64\netsh.exe
      netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\Umbrella.flv.exe" "Umbrella.flv.exe" ENABLE
      2⤵
      • Modifies Windows Firewall
      PID:5096

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Replication Through Removable Media

1
T1091

Execution

Persistence

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Privilege Escalation

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Defense Evasion

Credential Access

Discovery

Lateral Movement

Replication Through Removable Media

1
T1091

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

  • F:\Umbrella.flv.exe
    Filesize

    93KB

    MD5

    9c8cfc8027b21ff03525c1880ed347c1

    SHA1

    3565ba9d14ab917ed66625a968bef184089e3c32

    SHA256

    76231f72576c98527990b748706fd506d2fed084d12ebdc7b4e7952d1859e236

    SHA512

    dbc67bc5c71bc69010db8fa4d94e574f6b804216236b77af35d0f493230d5049716ed28a25256790ecfec8b33c02ad7f6b57c664c35d1b7dec899495eb089aac

    Download Submit
  • memory/4952-0-0x00000000746D0000-0x0000000074C81000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/4952-1-0x00000000746D0000-0x0000000074C81000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/4952-2-0x0000000001930000-0x0000000001940000-memory.dmp
    Filesize

    64KB

    Download
  • memory/4952-15-0x00000000746D0000-0x0000000074C81000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/4952-16-0x00000000746D0000-0x0000000074C81000-memory.dmp
    Filesize

    5.7MB

    Download