1531a158dcb1c98da90e4625671d1cec0a838f1ec00ccee27013e9758e28cde8

Analysis

max time kernel
118s
max time network
132s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
08-09-2023 11:41

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General

Target

Download/muyyuvd.exe
Size

1.4MB
MD5

768e4477abc5c60667290601bfe58b8e
SHA1

688c99ef523cff22a20bfe70b1a9d3855669ea21
SHA256

e7c87b0791bdb4f723af07d7b6c8dd79c3d9e1667f7ff6ad271665f3755d6ab8
SHA512

1c57a8671dd4623d434116c875c63b31df123896cd6e00d7d8daa8c4d9c9bf09d085f06f62c302a7b2a8ab08520d9bf49062e824e6b3420f75893f13b18284cc
SSDEEP

12288:kTeEBQDPeK6zp48Tm9yLogwL8soAsgp8R3D0kUodp3nBigg/vwr2I4TgV:QehDPh6XoyEgGEARpvtoPx8Sg

Score

7^/10

vmprotect

Malware Config

Signatures

VMProtect packed file 3 IoCs

Detects executables packed with VMProtect commercial packer.

vmprotect

Processes:

resource	yara_rule
behavioral7/memory/2036-0-0x0000000000400000-0x0000000000564000-memory.dmp	vmprotect
behavioral7/memory/2036-1-0x0000000000400000-0x0000000000564000-memory.dmp	vmprotect
behavioral7/memory/2036-20-0x0000000000400000-0x0000000000564000-memory.dmp	vmprotect

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

muyyuvd.exe

pid process

2036 muyyuvd.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2668 2036 WerFault.exe muyyuvd.exe

pid	process
2036	muyyuvd.exe

pid	pid_target	process	target process
2668	2036	WerFault.exe	muyyuvd.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

Processes:

muyyuvd.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436	muyyuvd.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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	muyyuvd.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

muyyuvd.exe

description	pid	process	target process
PID 2036 wrote to memory of 2668	2036	muyyuvd.exe	WerFault.exe
PID 2036 wrote to memory of 2668	2036	muyyuvd.exe	WerFault.exe
PID 2036 wrote to memory of 2668	2036	muyyuvd.exe	WerFault.exe
PID 2036 wrote to memory of 2668	2036	muyyuvd.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\Download\muyyuvd.exe
"C:\Users\Admin\AppData\Local\Temp\Download\muyyuvd.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Modifies system certificate store
- Suspicious use of WriteProcessMemory
PID:2036

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2036 -s 1384
2⤵
- Program crash
PID:2668

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Subvert Trust Controls

T1553

Install Root Certificate

T1553.004

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2036-0-0x0000000000400000-0x0000000000564000-memory.dmp

Filesize
1.4MB

Download
memory/2036-1-0x0000000000400000-0x0000000000564000-memory.dmp

Filesize
1.4MB

Download
memory/2036-20-0x0000000000400000-0x0000000000564000-memory.dmp

Filesize
1.4MB

Download