Overview

overview

10

Static

static

10

ServeFDr.exe

windows7-x64

8

ServeFDr.exe

windows10-2004-x64

8

Analysis

  • max time kernel
    151s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231127-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231127-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-12-2023 17:27

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General

  • Target

    ServeFDr.exe

  • Size

    93KB

  • MD5

    9af8fc91af5e99e4373cbb5713dd40ec

  • SHA1

    3ec0d34c5769ec819cb02a2d0bc8f7fde20505c9

  • SHA256

    1e7708aaa98da8303b9826e82ed2d0777a5684ecda49071eb91c9d0db4e02172

  • SHA512

    fb7bb746f660e024ed78c66ab9f5685e1d28b851dbf5227ddd09e686f13b8f3537c7678b8794e02362a99e83e462e8f9d9c7934aa3c83ef5db0c83c7fa1817ab

  • SSDEEP

    1536:p+jJD/HBZbszKu9AZpy7r1jEwzGi1dDnDagS:p+CzK4AZwHCi1dXf

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 37 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ServeFDr.exe
    "C:\Users\Admin\AppData\Local\Temp\ServeFDr.exe"
    1⤵
    • Drops startup file
    • Drops autorun.inf file
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3336
    • C:\Windows\SysWOW64\netsh.exe
      netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\ServeFDr.exe" "ServeFDr.exe" ENABLE
      2⤵
      • Modifies Windows Firewall
      PID:4544

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

    9af8fc91af5e99e4373cbb5713dd40ec

    SHA1

    3ec0d34c5769ec819cb02a2d0bc8f7fde20505c9

    SHA256

    1e7708aaa98da8303b9826e82ed2d0777a5684ecda49071eb91c9d0db4e02172

    SHA512

    fb7bb746f660e024ed78c66ab9f5685e1d28b851dbf5227ddd09e686f13b8f3537c7678b8794e02362a99e83e462e8f9d9c7934aa3c83ef5db0c83c7fa1817ab

    Download Submit
  • memory/3336-0-0x00000000750C0000-0x0000000075671000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/3336-1-0x00000000750C0000-0x0000000075671000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/3336-2-0x0000000000A60000-0x0000000000A70000-memory.dmp
    Filesize

    64KB

    Download
  • memory/3336-21-0x00000000750C0000-0x0000000075671000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/3336-22-0x00000000750C0000-0x0000000075671000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/3336-23-0x0000000000A60000-0x0000000000A70000-memory.dmp
    Filesize

    64KB

    Download