Resubmissions

17-02-2024 22:16

240217-1682labg72 10

17-02-2024 22:12

240217-14yg3sbc5t 6

General

  • Target

    SubZeroTempSpoofer.exe

  • Size

    1.6MB

  • Sample

    240217-1682labg72

  • MD5

    052449d155e679a80df0061fcc93e502

  • SHA1

    b09e4fe7002c193cf42ba4da2499b77ae561c457

  • SHA256

    830911c62e119f783336370841718d96c5fffa236ec485b434b6de7dcaf6c46b

  • SHA512

    5472b8b4a98513c7aad5d98c1522439d3d48e054f6b4490bdee9698fcff48a3570d1bd1c7d4c2571c5584b9abf9e34db3060dd215895e856368f8fd26912e941

  • SSDEEP

    24576:NWhpLZFBqScHobQ3EJEYFrk5FNQDdJVlDGUCbs+trje6B/F5b1ygR:N2pLZ3qScUQ3EJEYFrkufVlDGN4qVy

Malware Config

Targets

    • Target

      SubZeroTempSpoofer.exe

    • Size

      1.6MB

    • MD5

      052449d155e679a80df0061fcc93e502

    • SHA1

      b09e4fe7002c193cf42ba4da2499b77ae561c457

    • SHA256

      830911c62e119f783336370841718d96c5fffa236ec485b434b6de7dcaf6c46b

    • SHA512

      5472b8b4a98513c7aad5d98c1522439d3d48e054f6b4490bdee9698fcff48a3570d1bd1c7d4c2571c5584b9abf9e34db3060dd215895e856368f8fd26912e941

    • SSDEEP

      24576:NWhpLZFBqScHobQ3EJEYFrk5FNQDdJVlDGUCbs+trje6B/F5b1ygR:N2pLZ3qScUQ3EJEYFrkufVlDGN4qVy

    • Cerber

      Cerber is a widely used ransomware-as-a-service (RaaS), first seen in 2017.

    • Deletes NTFS Change Journal

      The USN change journal is a persistent log of all changes made to local files used by Windows Server systems.

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Downloads MZ/PE file

    • 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.

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Themida packer

      Detects Themida, an advanced Windows software protection 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.

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • 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 NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v13

Execution

Scheduled Task/Job

1
T1053

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Indicator Removal

2
T1070

File Deletion

2
T1070.004

Virtualization/Sandbox Evasion

1
T1497

Modify Registry

2
T1112

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

7
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

8
T1082

Peripheral Device Discovery

2
T1120

Remote System Discovery

1
T1018

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Impact

Inhibit System Recovery

3
T1490

Data Destruction

1
T1485

Tasks