b0fcddf7e2136c3a682e35fb9bb564db44e297fbee5ece3b604d805286207ece

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
19-09-2024 05:28

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General

Target

tcpz64.exe
Size

737KB
MD5

7368655a99d81b2b2ae2e13765421313
SHA1

6b8144df8ce9f6566ec6fff77844c2622ba45b22
SHA256

aa3688a07bfbe5df55d5fc26d5ace38d48c9882d5038df4b91c85cadac02584c
SHA512

c63886f057869e677af01c63f7cdc82d78c271dc77277c4fad744df0be35b694be6eb653f907aa2f0c0d0e83a3e7440ae9ef4e4b98244a9545a11e40609e0c89
SSDEEP

6144:u+S9Re4T87LZcOXp6O1+MhUdMhOHHw59Kmlxf0Y8P0oH9EQZJLLaTu6yVAuPa9bO:DSW4gZ6+Xf0oQLL6yY9Cokf

Score

9^/10

defense_evasion evasion ransomware

Malware Config

Signatures

Modifies boot configuration data using bcdedit 1 TTPs 1 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
4788	bcdedit.exe

Enables test signing to bypass driver trust controls 1 TTPs 1 IoCs

Allows any signed driver to load without validation against a trusted certificate authority.

defense_evasion

Code Signing Policy Modification

T1553.006

pid	Process
4788	bcdedit.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	tcpz64.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
660	Process not Found

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4740	tcpz64.exe
4740	tcpz64.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4740 wrote to memory of 4788	4740	tcpz64.exe	88
PID 4740 wrote to memory of 4788	4740	tcpz64.exe	88

C:\Users\Admin\AppData\Local\Temp\tcpz64.exe
"C:\Users\Admin\AppData\Local\Temp\tcpz64.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4740
- C:\Windows\System32\bcdedit.exe
  "C:\Windows\System32\bcdedit.exe" -set TESTSIGNING ON
  2⤵
  - Modifies boot configuration data using bcdedit
  - Enables test signing to bypass driver trust controls
  PID:4788

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Subvert Trust Controls

T1553

Code Signing Policy Modification

T1553.006

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact