General

  • Target

    PO sept2116 FRP-SHM.doc

  • Size

    341KB

  • Sample

    210916-slchwsgeeq

  • MD5

    dc9a33a35b76796e46c64dd1b464b12f

  • SHA1

    a235e802a62465a8985af532730d89e60f17f982

  • SHA256

    39f9e4df37b9d4b3e5ad5df753c9e8c3617472f3cfa778e43ddd822544455788

  • SHA512

    f07653cea29668a76197ae59c5ca7e918517d068a5050df4a5bd1d3261a1451df7d164c197151a9c0dbd61b697c66054b9383d7b92a3c73925ad1bfaacc07f94

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
exe.dropper

httP://esetnode32-antiviru.ydns.eu/EXCEL.exe

Extracted

Family

xpertrat

Version

3.0.10

Botnet

Test

C2

kapasky-antivirus.firewall-gateway.net:4000

Mutex

L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0

Targets

    • Target

      PO sept2116 FRP-SHM.doc

    • Size

      341KB

    • MD5

      dc9a33a35b76796e46c64dd1b464b12f

    • SHA1

      a235e802a62465a8985af532730d89e60f17f982

    • SHA256

      39f9e4df37b9d4b3e5ad5df753c9e8c3617472f3cfa778e43ddd822544455788

    • SHA512

      f07653cea29668a76197ae59c5ca7e918517d068a5050df4a5bd1d3261a1451df7d164c197151a9c0dbd61b697c66054b9383d7b92a3c73925ad1bfaacc07f94

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • UAC bypass

    • Windows security bypass

    • XpertRAT

      XpertRAT is a remote access trojan with various capabilities.

    • XpertRAT Core Payload

    • Adds policy Run key to start application

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Loads dropped DLL

    • Windows security modification

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

2
T1060

Privilege Escalation

Bypass User Account Control

1
T1088

Defense Evasion

Bypass User Account Control

1
T1088

Disabling Security Tools

3
T1089

Modify Registry

7
T1112

Discovery

System Information Discovery

4
T1082

Query Registry

2
T1012

Tasks