Overview

overview

10

Static

static

244A9C5318...AD.exe

windows7_x64

10

244A9C5318...AD.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    141s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    27-04-2022 01:17

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General

  • Target

    244A9C5318E98599C60F3DACBFF48F4F0A898CCDA29AD.exe

  • Size

    184KB

  • MD5

    0a56a968a7f1c3d265acf38740a93d38

  • SHA1

    bf17dcba21603a6681f0f9bbec81d356e33d9029

  • SHA256

    244a9c5318e98599c60f3dacbff48f4f0a898ccda29ad8a6a8625e3cfe0dbc22

  • SHA512

    81d90036885ec7389f146bef660a8553a76179972ddffa5e001f74104165166cf0aad2355db6c80575b26c7b5012aea973470f02913ba128c28e71449f03919f

Score
10/10
bootkitpersistencesuricata

Malware Config

Signatures

  • suricata: ET MALWARE Backdoor family PCRat/Gh0st CnC traffic

    suricata: ET MALWARE Backdoor family PCRat/Gh0st CnC traffic

    suricata
  • suricata: ET MALWARE Backdoor family PCRat/Gh0st CnC traffic (OUTBOUND) 102

    suricata: ET MALWARE Backdoor family PCRat/Gh0st CnC traffic (OUTBOUND) 102

    suricata
  • Sets DLL path for service in the registry 2 TTPs
    persistence
  • Loads dropped DLL 1 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

    bootkitpersistence
  • Drops file in System32 directory 2 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies data under HKEY_USERS 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\244A9C5318E98599C60F3DACBFF48F4F0A898CCDA29AD.exe
    "C:\Users\Admin\AppData\Local\Temp\244A9C5318E98599C60F3DACBFF48F4F0A898CCDA29AD.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious behavior: EnumeratesProcesses
    PID:2452
  • C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe -k netsvcs -s fastuserswitchingcompatibility
    1⤵
    • Loads dropped DLL
    • Writes to the Master Boot Record (MBR)
    • Checks processor information in registry
    • Modifies data under HKEY_USERS
    • Suspicious use of AdjustPrivilegeToken
    PID:4536

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1
T1060

Bootkit

1
T1067

Privilege Escalation

Defense Evasion

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • C:\Windows\SysWOW64\ntfastuserswitchingcompatibility.dll
    Filesize

    148KB

    MD5

    e46805ba07872d3ce3153e942e625865

    SHA1

    00fa01edafea33663aea78dec6e87570222d56a2

    SHA256

    fcfb65748ba59e37e962618a484087b43da6be9d787f9d73b156d5f14ffedbd3

    SHA512

    44b0eee1c7818cf02ef4da94ea612981ab97a31e3575971bd543b6a61deece62a428eca33e554e311ff599d596117847a422753e3a393c1ae68ddad5850131cf

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  • \??\c:\windows\SysWOW64\ntfastuserswitchingcompatibility.dll
    Filesize

    148KB

    MD5

    e46805ba07872d3ce3153e942e625865

    SHA1

    00fa01edafea33663aea78dec6e87570222d56a2

    SHA256

    fcfb65748ba59e37e962618a484087b43da6be9d787f9d73b156d5f14ffedbd3

    SHA512

    44b0eee1c7818cf02ef4da94ea612981ab97a31e3575971bd543b6a61deece62a428eca33e554e311ff599d596117847a422753e3a393c1ae68ddad5850131cf

    Download Submit