General

  • Target

    Fri0575b7d291a755f8.exe

  • Size

    75KB

  • Sample

    211022-rz6hfscfdm

  • MD5

    3399436f50fad870cade4f68de68a76d

  • SHA1

    a690dd92fa2902ec5881b1ed55b1bb7316f48b70

  • SHA256

    9e9519db3a55dd28cc85ddb8e02990758fa23d0f387e006de073e30277bce862

  • SHA512

    c558ca8b467e3375d9f5e5db9801ce400cd5d0ce86b53ec4fe0d2452284afb32b642d915e6c89d9ec34bda1f81a75ad19c3aced770732573a0f55bfd0de6de03

Malware Config

Targets

    • Target

      Fri0575b7d291a755f8.exe

    • Size

      75KB

    • MD5

      3399436f50fad870cade4f68de68a76d

    • SHA1

      a690dd92fa2902ec5881b1ed55b1bb7316f48b70

    • SHA256

      9e9519db3a55dd28cc85ddb8e02990758fa23d0f387e006de073e30277bce862

    • SHA512

      c558ca8b467e3375d9f5e5db9801ce400cd5d0ce86b53ec4fe0d2452284afb32b642d915e6c89d9ec34bda1f81a75ad19c3aced770732573a0f55bfd0de6de03

    • Registers COM server for autorun

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

    • Executes dropped EXE

    • Sets service image path in registry

    • Checks BIOS information in registry

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

    • 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.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • 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

    • Legitimate hosting services abused for malware hosting/C2

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

3
T1060

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Modify Registry

3
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

4
T1082

Collection

Data from Local System

2
T1005

Command and Control

Web Service

1
T1102

Tasks