Resubmissions

20-01-2021 09:31

210120-y3h9wsa5de 10

11-01-2021 07:47

210111-ejedv476k6 9

General

  • Target

    ab3580b5eb547523abf3c29133504c64.exe

  • Size

    5.3MB

  • Sample

    210120-y3h9wsa5de

  • MD5

    ab3580b5eb547523abf3c29133504c64

  • SHA1

    8f3d44bb3a48a76be53b8e6d227b5dda432ed5b5

  • SHA256

    1ba569c631438a0fb356441838ff328835d607e7cdb217cc444923c1ec58337b

  • SHA512

    5a3c89cd5f73ae2d2330cc362d58556280b2ca5196aa1643982c3622936c024088ed3cbc72f5489fe2c326495b82cb69cbeacb81d112ca9fdf0af183c95b5ff4

Malware Config

Targets

    • Target

      ab3580b5eb547523abf3c29133504c64.exe

    • Size

      5.3MB

    • MD5

      ab3580b5eb547523abf3c29133504c64

    • SHA1

      8f3d44bb3a48a76be53b8e6d227b5dda432ed5b5

    • SHA256

      1ba569c631438a0fb356441838ff328835d607e7cdb217cc444923c1ec58337b

    • SHA512

      5a3c89cd5f73ae2d2330cc362d58556280b2ca5196aa1643982c3622936c024088ed3cbc72f5489fe2c326495b82cb69cbeacb81d112ca9fdf0af183c95b5ff4

    • Suspicious use of NtCreateProcessExOtherParentProcess

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

    • Blocklisted process makes network request

    • Executes dropped EXE

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Checks BIOS information in registry

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

    • Drops startup file

    • Identifies Wine through registry keys

      Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Checks installed software on the system

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

    • Drops desktop.ini file(s)

    • 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.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

5
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

2
T1082

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Tasks