89e6c206fda9f3a617f7e71dff1046389aae8897e231d6d19d2da692a54b4a01

General

Target

muyesi.exe
Size

3.5MB
MD5

65c50d3c08ea164e7919b8b867d5d186
SHA1

a4d7ef571989369d9776cd53d6c1df6b70fe4631
SHA256

89e6c206fda9f3a617f7e71dff1046389aae8897e231d6d19d2da692a54b4a01
SHA512

bf628c28ae7a0bc95ea54b70504eb7cd1b3f6dd3b6f2e3a37ddefcc75f60cde9ac39588bc63092857aa41ecd22ebc3ab1c609ffba4fe88267b7239f91f503009

Score

9^/10

evasion themida trojan

Malware Config

Signatures

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

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Executes dropped EXE 1 IoCs

Processes:

IntelRapid.exe

pid process

952 IntelRapid.exe

pid	process
952	IntelRapid.exe

Checks BIOS information in registry 2 TTPs 4 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

IntelRapid.exemuyesi.exe

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

Drops startup file 1 IoCs

Processes:

muyesi.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\IntelRapid.lnk muyesi.exe
Loads dropped DLL 3 IoCs

Processes:

muyesi.exe

pid process

960 muyesi.exe
960 muyesi.exe
960 muyesi.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\IntelRapid.lnk	muyesi.exe

pid	process
960	muyesi.exe
960	muyesi.exe
960	muyesi.exe

Themida packer 10 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral1/memory/960-54-0x000000013FC90000-0x000000014060A000-memory.dmp	themida
behavioral1/memory/960-55-0x000000013FC90000-0x000000014060A000-memory.dmp	themida
behavioral1/memory/960-56-0x000000013FC90000-0x000000014060A000-memory.dmp	themida
\Users\Admin\AppData\Roaming\Intel Rapid\IntelRapid.exe	themida
\Users\Admin\AppData\Roaming\Intel Rapid\IntelRapid.exe	themida
C:\Users\Admin\AppData\Roaming\Intel Rapid\IntelRapid.exe	themida
\Users\Admin\AppData\Roaming\Intel Rapid\IntelRapid.exe	themida
behavioral1/memory/952-62-0x000000013F070000-0x000000013F9EA000-memory.dmp	themida
behavioral1/memory/952-63-0x000000013F070000-0x000000013F9EA000-memory.dmp	themida
behavioral1/memory/952-64-0x000000013F070000-0x000000013F9EA000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

muyesi.exeIntelRapid.exe

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

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

muyesi.exeIntelRapid.exe

pid process

960 muyesi.exe
952 IntelRapid.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

IntelRapid.exe

pid process

952 IntelRapid.exe

pid	process
960	muyesi.exe
952	IntelRapid.exe

pid	process
952	IntelRapid.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

muyesi.exe

description	pid	process	target process
PID 960 wrote to memory of 952	960	muyesi.exe	IntelRapid.exe
PID 960 wrote to memory of 952	960	muyesi.exe	IntelRapid.exe
PID 960 wrote to memory of 952	960	muyesi.exe	IntelRapid.exe

C:\Users\Admin\AppData\Local\Temp\muyesi.exe
"C:\Users\Admin\AppData\Local\Temp\muyesi.exe"
1⤵
- Checks BIOS information in registry
- Drops startup file
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:960

C:\Users\Admin\AppData\Roaming\Intel Rapid\IntelRapid.exe
"C:\Users\Admin\AppData\Roaming\Intel Rapid\IntelRapid.exe"
2⤵
- Executes dropped EXE
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: AddClipboardFormatListener
PID:952

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

2

T1012

Virtualization/Sandbox Evasion

1

T1497

System Information Discovery

3

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\Intel Rapid\IntelRapid.exe
MD5
65c50d3c08ea164e7919b8b867d5d186

SHA1
a4d7ef571989369d9776cd53d6c1df6b70fe4631

SHA256
89e6c206fda9f3a617f7e71dff1046389aae8897e231d6d19d2da692a54b4a01

SHA512
bf628c28ae7a0bc95ea54b70504eb7cd1b3f6dd3b6f2e3a37ddefcc75f60cde9ac39588bc63092857aa41ecd22ebc3ab1c609ffba4fe88267b7239f91f503009

Download Submit
\Users\Admin\AppData\Roaming\Intel Rapid\IntelRapid.exe
MD5
65c50d3c08ea164e7919b8b867d5d186

SHA1
a4d7ef571989369d9776cd53d6c1df6b70fe4631

SHA256
89e6c206fda9f3a617f7e71dff1046389aae8897e231d6d19d2da692a54b4a01

SHA512
bf628c28ae7a0bc95ea54b70504eb7cd1b3f6dd3b6f2e3a37ddefcc75f60cde9ac39588bc63092857aa41ecd22ebc3ab1c609ffba4fe88267b7239f91f503009

Download Submit
\Users\Admin\AppData\Roaming\Intel Rapid\IntelRapid.exe
MD5
65c50d3c08ea164e7919b8b867d5d186

SHA1
a4d7ef571989369d9776cd53d6c1df6b70fe4631

SHA256
89e6c206fda9f3a617f7e71dff1046389aae8897e231d6d19d2da692a54b4a01

SHA512
bf628c28ae7a0bc95ea54b70504eb7cd1b3f6dd3b6f2e3a37ddefcc75f60cde9ac39588bc63092857aa41ecd22ebc3ab1c609ffba4fe88267b7239f91f503009

Download Submit
\Users\Admin\AppData\Roaming\Intel Rapid\IntelRapid.exe
MD5
65c50d3c08ea164e7919b8b867d5d186

SHA1
a4d7ef571989369d9776cd53d6c1df6b70fe4631

SHA256
89e6c206fda9f3a617f7e71dff1046389aae8897e231d6d19d2da692a54b4a01

SHA512
bf628c28ae7a0bc95ea54b70504eb7cd1b3f6dd3b6f2e3a37ddefcc75f60cde9ac39588bc63092857aa41ecd22ebc3ab1c609ffba4fe88267b7239f91f503009

Download Submit
memory/952-62-0x000000013F070000-0x000000013F9EA000-memory.dmp

Filesize
9.5MB

Download
memory/952-63-0x000000013F070000-0x000000013F9EA000-memory.dmp

Filesize
9.5MB

Download
memory/952-64-0x000000013F070000-0x000000013F9EA000-memory.dmp

Filesize
9.5MB

Download
memory/960-54-0x000000013FC90000-0x000000014060A000-memory.dmp

Filesize
9.5MB

Download
memory/960-55-0x000000013FC90000-0x000000014060A000-memory.dmp

Filesize
9.5MB

Download
memory/960-56-0x000000013FC90000-0x000000014060A000-memory.dmp

Filesize
9.5MB

Download
memory/960-57-0x000007FEFBC31000-0x000007FEFBC33000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads