4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff

Analysis

max time kernel
130s
max time network
182s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
03/10/2022, 15:53

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe
Size

674KB
MD5

68fdc91af3dc4cca3a47bcec7976f780
SHA1

6ed128c6004ed3f8253a2b6de7f5b94bf3a5a313
SHA256

4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff
SHA512

a1b1e075b4115b39f83535acbe7f31459bfb053ad83e74d7bd017c359b0d516879bd9f2a25431c9ec1e166dd2b954d78f7ba351ada565e5e0a7c414f565c3052
SSDEEP

12288:UsAqMGHGSX1388BxGVI43GVpinJ2suEn23teGb/I5FqVbp7qSE2+37T5zqT:UsBbW1SaUEn2deGbfXzSLTpqT

Score

10^/10

persistence

Malware Config

Signatures

Modifies system executable filetype association 2 TTPs 1 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1042

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe

Modifies Installed Components in the registry 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{939F9851-8B9A-11D5-EBA1-F78EEEEEE983}\StubPath = "msybi32.exe"	4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{939F9851-8B9A-11D5-EBA1-F78EEEEEE983}	4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe"	4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe"	4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\vcl32.exe	4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe
File opened for modification	C:\Windows\SysWOW64\vcl32.exe	4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe
File created	C:\Windows\SysWOW64\msybi32.exe	4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe
File opened for modification	C:\Windows\SysWOW64\msybi32.exe	4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe
File created	C:\Windows\SysWOW64\concp32.exe	4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe
File opened for modification	C:\Windows\SysWOW64\concp32.exe	4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4168	4856	WerFault.exe	80

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{939F9851-8B9A-11D5-EBA1-F78EEEEEE983}	4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{939F9851-8B9A-11D5-EBA1-F78EEEEEE983}\InprocServer32	4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{939F9851-8B9A-11D5-EBA1-F78EEEEEE983}\sm = ebb5525fa3bcf9422c8ff945977d6af9	4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{939F9851-8B9A-11D5-EBA1-F78EEEEEE983}\ax = 6d13e409a62f1a24530d509070297293	4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
4856	4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe

C:\Users\Admin\AppData\Local\Temp\4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe
"C:\Users\Admin\AppData\Local\Temp\4c1055c8af06e04f431f938de4cca6bf1d465b2cbeb0a6a03fed5d94287973ff.exe"
1⤵
- Modifies system executable filetype association
- Modifies Installed Components in the registry
- Adds Run key to start application
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
PID:4856
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4856 -s 700
  2⤵
  - Program crash
  PID:4168

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 364 -p 4856 -ip 4856
1⤵
PID:1992

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Change Default File Association

T1042

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/4856-132-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/4856-133-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download