e8e4a4c7c5c593136058722cabe2d42631feffde95d923f5fd7020b0c7286f22

Analysis

max time kernel
129s
max time network
151s
platform
windows7_x64
resource
win7-20220414-en
submitted
26-06-2022 18:28

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General

Target

windows_update.exe
Size

3.4MB
MD5

9e78ed405e72f424f4f67d40a7c78857
SHA1

a530781e06668750be976fe1ed545a3f43d833f3
SHA256

e8e4a4c7c5c593136058722cabe2d42631feffde95d923f5fd7020b0c7286f22
SHA512

cfb9c85bdcb36a1962f6230c9ea1505534689b15f55175f5e77f685472081c7630bbd1f0ef9154fa11849e6285062125902b7808c646125de759b65827b964b7

Score

9^/10

evasion themida trojan

Malware Config

Signatures

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

windows_update.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ windows_update.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	windows_update.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

windows_update.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	windows_update.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	windows_update.exe

Themida packer 3 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral1/memory/1900-55-0x0000000000A10000-0x0000000000D7D000-memory.dmp	themida
behavioral1/memory/1900-57-0x0000000000A10000-0x0000000000D7D000-memory.dmp	themida
behavioral1/memory/1900-59-0x0000000000A10000-0x0000000000D7D000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

windows_update.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA windows_update.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

windows_update.exe

pid process

1900 windows_update.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

windows_update.exe

pid process

1900 windows_update.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	windows_update.exe

pid	process
1900	windows_update.exe

pid	process
1900	windows_update.exe

C:\Users\Admin\AppData\Local\Temp\windows_update.exe
"C:\Users\Admin\AppData\Local\Temp\windows_update.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
PID:1900

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1900-54-0x0000000076011000-0x0000000076013000-memory.dmp

Filesize
8KB

Download
memory/1900-55-0x0000000000A10000-0x0000000000D7D000-memory.dmp

Filesize
3.4MB

Download
memory/1900-57-0x0000000000A10000-0x0000000000D7D000-memory.dmp

Filesize
3.4MB

Download
memory/1900-58-0x00000000779C0000-0x0000000077B40000-memory.dmp

Filesize
1.5MB

Download
memory/1900-59-0x0000000000A10000-0x0000000000D7D000-memory.dmp

Filesize
3.4MB

Download