9fd10bf47b3cc8064550344ccc5bd40f94072ccca78254b7e464ec6f8bcf03ca

Analysis

max time kernel
142s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20230831-en
resource tags

arch:x64arch:x86image:win10v2004-20230831-enlocale:en-usos:windows10-2004-x64system
submitted
07-09-2023 09:51

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General

Target

SkySky/fntestdll.dll
Size

112KB
MD5

222cb728a576c5e11a4f2544eeef52da
SHA1

9a4e98a2b63f662dcfff955c31f4e0859adf0964
SHA256

6e813ceecf905b9a769c88d0a6909749c9758fa166351fe5cb74f99f7090dd2f
SHA512

5bf3d19e0a1d6594097fa2cc7830c31cdf72da54da9d6d2ba8d69571c588363cd358675e2074b29d0365be6ff328121178b3486e7073aa3dc70d7e9f877c4f22
SSDEEP

1536:jGAml8LXVT/ZKCjNCF8k8gWkug+hXG2OL5Udp7FtsWn5s:jvLfhjb/kQVa+dp5tj

Score

5^/10

Malware Config

Signatures

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{5A72F8D4-B14D-4C09-B2C8-A0E6E4982D2D}.catalogItem	svchost.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1144	4780	WerFault.exe	81

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	svchost.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	svchost.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4768 wrote to memory of 4780	4768	rundll32.exe	81
PID 4768 wrote to memory of 4780	4768	rundll32.exe	81
PID 4768 wrote to memory of 4780	4768	rundll32.exe	81

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\SkySky\fntestdll.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4768
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\SkySky\fntestdll.dll,#1
  2⤵
  PID:4780
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4780 -s 620
    3⤵
    - Program crash
    PID:1144

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k netsvcs -p
1⤵
- Drops file in System32 directory
- Checks processor information in registry
- Enumerates system info in registry
PID:4452

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 200 -p 4780 -ip 4780
1⤵
PID:4200

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4780-0-0x0000000000860000-0x000000000086C000-memory.dmp

Filesize
48KB

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads