General

  • Target

    VbN3DApa

  • Size

    2KB

  • Sample

    240515-hqfq1aeb46

  • MD5

    d4f4f0d6954a3e724e9019dafe756eb7

  • SHA1

    55676693aff704806894dba78577ac73abc9a24a

  • SHA256

    ad853d0877e60d9f903ede78c34082b93e090cb5277ef9d0ff875553c953c255

  • SHA512

    9d0d73867a2989fd132db563b9dd4e99806618b2597d84f5862d0aacaea89c7bf15a022f949d0b0cf5d3d43426f7ec675d58e7758fba7e27e3b644afa80cb107

Malware Config

Targets

    • Target

      VbN3DApa

    • Size

      2KB

    • MD5

      d4f4f0d6954a3e724e9019dafe756eb7

    • SHA1

      55676693aff704806894dba78577ac73abc9a24a

    • SHA256

      ad853d0877e60d9f903ede78c34082b93e090cb5277ef9d0ff875553c953c255

    • SHA512

      9d0d73867a2989fd132db563b9dd4e99806618b2597d84f5862d0aacaea89c7bf15a022f949d0b0cf5d3d43426f7ec675d58e7758fba7e27e3b644afa80cb107

    • Cobalt Strike reflective loader

      Detects the reflective loader used by Cobalt Strike.

    • Cobaltstrike

      Detected malicious payload which is part of Cobaltstrike.

    • Detect ZGRat V1

    • ZGRat

      ZGRat is remote access trojan written in C#.

    • Modifies boot configuration data using bcdedit

    • Contacts a large (543) amount of remote hosts

      This may indicate a network scan to discover remotely running services.

    • Creates new service(s)

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Manipulates Digital Signatures

      Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to obtain their binary as valid.

    • Modifies Installed Components in the registry

    • Modifies Windows Firewall

    • Possible privilege escalation attempt

    • Sets service image path in registry

    • Checks BIOS information in registry

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

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

    • Modifies system executable filetype association

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Registers COM server for autorun

    • Unexpected DNS network traffic destination

      Network traffic to other servers than the configured DNS servers was detected on the DNS port.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • Checks for any installed AV software in registry

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Checks whether UAC is enabled

    • Drops desktop.ini file(s)

    • Enumerates connected drives

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

    • Modifies powershell logging option

    • Writes to the Master Boot Record (MBR)

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

    • AutoIT Executable

      AutoIT scripts compiled to PE executables.

    • Checks system information in the registry

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

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Execution

System Services

1
T1569

Service Execution

1
T1569.002

Persistence

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Boot or Logon Autostart Execution

4
T1547

Registry Run Keys / Startup Folder

4
T1547.001

Event Triggered Execution

1
T1546

Change Default File Association

1
T1546.001

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Privilege Escalation

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Boot or Logon Autostart Execution

4
T1547

Registry Run Keys / Startup Folder

4
T1547.001

Event Triggered Execution

1
T1546

Change Default File Association

1
T1546.001

Defense Evasion

Subvert Trust Controls

2
T1553

SIP and Trust Provider Hijacking

1
T1553.003

Install Root Certificate

1
T1553.004

Modify Registry

7
T1112

Impair Defenses

1
T1562

Disable or Modify System Firewall

1
T1562.004

File and Directory Permissions Modification

1
T1222

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Credential Access

Unsecured Credentials

2
T1552

Credentials In Files

2
T1552.001

Discovery

Network Service Discovery

1
T1046

Query Registry

9
T1012

System Information Discovery

10
T1082

Software Discovery

1
T1518

Security Software Discovery

1
T1518.001

Peripheral Device Discovery

2
T1120

Collection

Data from Local System

2
T1005

Impact

Inhibit System Recovery

1
T1490

Tasks