4ddaa14f57744b2cac875ffb15a09e49246b9a45ab3c1122dca7aa47f820a1f2

Analysis

max time kernel
119s
max time network
123s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
30-06-2024 07:11

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General

Target

$PLUGINSDIR/nsihelper.dll
Size

5.9MB
MD5

96955b513868646bff7b65b2e671e43f
SHA1

a36c0c4191e0ab5bd3948de17b94fb413af3a52c
SHA256

01615b77079a837aee522812eb82d60bd4c20c3c0a5a6739b623d3d18b2513ac
SHA512

b60fd0895f13958f089dbf1f11777a6372c9f6ec2ab77416f7f92d7e58dc5079f4523d1cbd013e9278fc1adda273a592be748e1be8b6b61dd61a70ed66c5f76f
SSDEEP

98304:7GfeZrOyJpVt1z1qKodLSabEyMbz7j5SKrnnfKO4SLcjixplkSQNe:KfeZDDB1wLxwyMn5TDnfV4nkpse

Score

9^/10

evasion 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:

rundll32.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ rundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	rundll32.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:

rundll32.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	rundll32.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

rundll32.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA rundll32.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

rundll32.exe

pid process

760 rundll32.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	rundll32.exe

pid	process
760	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 1112 wrote to memory of 760	1112	rundll32.exe	rundll32.exe
PID 1112 wrote to memory of 760	1112	rundll32.exe	rundll32.exe
PID 1112 wrote to memory of 760	1112	rundll32.exe	rundll32.exe
PID 1112 wrote to memory of 760	1112	rundll32.exe	rundll32.exe
PID 1112 wrote to memory of 760	1112	rundll32.exe	rundll32.exe
PID 1112 wrote to memory of 760	1112	rundll32.exe	rundll32.exe
PID 1112 wrote to memory of 760	1112	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\nsihelper.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1112

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\nsihelper.dll,#1
2⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:760

MITRE ATT&CK Matrix ATT&CK v13

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

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/760-0-0x0000000077670000-0x0000000077672000-memory.dmp

Filesize
8KB

Download
memory/760-1-0x0000000072A70000-0x0000000073A67000-memory.dmp

Filesize
16.0MB

Download
memory/760-2-0x0000000072A70000-0x0000000073A67000-memory.dmp

Filesize
16.0MB

Download
memory/760-4-0x0000000072A70000-0x0000000073A67000-memory.dmp

Filesize
16.0MB

Download
memory/760-3-0x0000000072A70000-0x0000000073A67000-memory.dmp

Filesize
16.0MB

Download
memory/760-5-0x0000000072A70000-0x0000000073A67000-memory.dmp

Filesize
16.0MB

Download
memory/760-7-0x0000000072A70000-0x0000000073A67000-memory.dmp

Filesize
16.0MB

Download
memory/760-6-0x0000000072A70000-0x0000000073A67000-memory.dmp

Filesize
16.0MB

Download
memory/760-8-0x0000000072A70000-0x0000000073A67000-memory.dmp

Filesize
16.0MB

Download
memory/760-10-0x0000000072A70000-0x0000000073A67000-memory.dmp

Filesize
16.0MB

Download