Overview

overview

10

Static

static

hvnc.exe

windows7_x64

10

hvnc.exe

windows10-2004_x64

10

Sharing

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General

  • Target

    hvnc.exe

  • Size

    138KB

  • Sample

    220426-wdz6rshdem

  • MD5

    bb434c347ca1709e54bee1a5d9a5757e

  • SHA1

    844b1f01f53eb6e8f8934880fa7f8994c4245dd4

  • SHA256

    0caa17db0c1d695ce4e5bc3f3fc7c9c2e7f96e489108e0303b81fa45efcf92bd

  • SHA512

    46b87c83ce85d44b152a5921b76f65af19fc93896bc8557b979c72ffdbaef3b21245f1c8aea75a5bd2125bc8df7485f2bcaf98d8b7ee0785c8c1496d08a571be

  • SSDEEP

    3072:PbvG5mz7Bqh1v59Y08mAjs0Ltel+qOeJHlpV8b+Y/Yt:PbviS7BqjjYHdrqkL/

Score
10/10
arrowratkrck1rpersistencerat

Malware Config

Extracted

Family

arrowrat

Botnet

KRCK1R

C2

185.183.35.38:1338

Mutex

4IA671

Targets

    • Target

      hvnc.exe

    • Size

      138KB

    • MD5

      bb434c347ca1709e54bee1a5d9a5757e

    • SHA1

      844b1f01f53eb6e8f8934880fa7f8994c4245dd4

    • SHA256

      0caa17db0c1d695ce4e5bc3f3fc7c9c2e7f96e489108e0303b81fa45efcf92bd

    • SHA512

      46b87c83ce85d44b152a5921b76f65af19fc93896bc8557b979c72ffdbaef3b21245f1c8aea75a5bd2125bc8df7485f2bcaf98d8b7ee0785c8c1496d08a571be

    • SSDEEP

      3072:PbvG5mz7Bqh1v59Y08mAjs0Ltel+qOeJHlpV8b+Y/Yt:PbviS7BqjjYHdrqkL/

    Score
    10/10
    arrowratkrck1rpersistencerat

    • ArrowRat

      Remote access tool with various capabilities first seen in late 2021.

      ratarrowrat

    • Modifies WinLogon for persistence

      persistence

    • Modifies Installed Components in the registry

      persistence

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1
T1004

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

3
T1012

Peripheral Device Discovery

2
T1120

System Information Discovery

3
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks