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

1008 IntelRapid.exe

pid	process
1008	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:

muyesi.exeIntelRapid.exe

description	ioc	process
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
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	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

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

Themida packer 8 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral2/memory/2608-114-0x00007FF655020000-0x00007FF65599A000-memory.dmp	themida
behavioral2/memory/2608-115-0x00007FF655020000-0x00007FF65599A000-memory.dmp	themida
behavioral2/memory/2608-116-0x00007FF655020000-0x00007FF65599A000-memory.dmp	themida
C:\Users\Admin\AppData\Roaming\Intel Rapid\IntelRapid.exe	themida
C:\Users\Admin\AppData\Roaming\Intel Rapid\IntelRapid.exe	themida
behavioral2/memory/1008-119-0x00007FF71DDC0000-0x00007FF71E73A000-memory.dmp	themida
behavioral2/memory/1008-120-0x00007FF71DDC0000-0x00007FF71E73A000-memory.dmp	themida
behavioral2/memory/1008-121-0x00007FF71DDC0000-0x00007FF71E73A000-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

2608 muyesi.exe
1008 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

1008 IntelRapid.exe

pid	process
2608	muyesi.exe
1008	IntelRapid.exe

pid	process
1008	IntelRapid.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

muyesi.exe

description	pid	process	target process
PID 2608 wrote to memory of 1008	2608	muyesi.exe	IntelRapid.exe
PID 2608 wrote to memory of 1008	2608	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
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:2608

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:1008

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

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Downloads

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

SHA1
a4d7ef571989369d9776cd53d6c1df6b70fe4631

SHA256
89e6c206fda9f3a617f7e71dff1046389aae8897e231d6d19d2da692a54b4a01

SHA512
bf628c28ae7a0bc95ea54b70504eb7cd1b3f6dd3b6f2e3a37ddefcc75f60cde9ac39588bc63092857aa41ecd22ebc3ab1c609ffba4fe88267b7239f91f503009

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

SHA1
a4d7ef571989369d9776cd53d6c1df6b70fe4631

SHA256
89e6c206fda9f3a617f7e71dff1046389aae8897e231d6d19d2da692a54b4a01

SHA512
bf628c28ae7a0bc95ea54b70504eb7cd1b3f6dd3b6f2e3a37ddefcc75f60cde9ac39588bc63092857aa41ecd22ebc3ab1c609ffba4fe88267b7239f91f503009

Download Submit
memory/1008-119-0x00007FF71DDC0000-0x00007FF71E73A000-memory.dmp

Filesize
9.5MB

Download
memory/1008-120-0x00007FF71DDC0000-0x00007FF71E73A000-memory.dmp

Filesize
9.5MB

Download
memory/1008-121-0x00007FF71DDC0000-0x00007FF71E73A000-memory.dmp

Filesize
9.5MB

Download
memory/2608-114-0x00007FF655020000-0x00007FF65599A000-memory.dmp

Filesize
9.5MB

Download
memory/2608-115-0x00007FF655020000-0x00007FF65599A000-memory.dmp

Filesize
9.5MB

Download
memory/2608-116-0x00007FF655020000-0x00007FF65599A000-memory.dmp

Filesize
9.5MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads