37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83

Analysis

max time kernel
135s
max time network
166s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
06/11/2022, 14:46

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General

Target

37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe
Size

414KB
MD5

0d56f996a1896a9ac2f1f02c788b52ae
SHA1

ab49a46545f22b922a8c646f4c6394ee0fe53075
SHA256

37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83
SHA512

fc493555d2118a3620de7b2d47d22105c661793402278f4b97cd8bd4f763524717f6424525ae9d555b3e13639b6d45d8f330013447e2a6c4a6fda9355958c449
SSDEEP

6144:NtKe6YiDdv3m3mgKHIl7bNIAROzTua3R/nxlJlpRkk+NNPIByTnyUrhFd4FpUG:NtKe6Zv23YdAPaB/xlvpRp6yUr6FpUG

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\" %*"	37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe

Modifies Installed Components in the registry 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{6A238B78-8B9A-11D5-EBA1-F78EEEEEE983}	37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{6A238B78-8B9A-11D5-EBA1-F78EEEEEE983}\StubPath = "mskmy32.exe"	37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.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"	37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe"	37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\vcl32.exe	37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe
File created	C:\Windows\SysWOW64\mskmy32.exe	37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe
File opened for modification	C:\Windows\SysWOW64\mskmy32.exe	37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe
File created	C:\Windows\SysWOW64\concp32.exe	37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe
File opened for modification	C:\Windows\SysWOW64\concp32.exe	37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe
File created	C:\Windows\SysWOW64\vcl32.exe	37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4844	3996	WerFault.exe	78

Modifies registry class 5 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6A238B78-8B9A-11D5-EBA1-F78EEEEEE983}\ax = 13d68149864af82989a6f25dbd6528b1	37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6A238B78-8B9A-11D5-EBA1-F78EEEEEE983}	37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6A238B78-8B9A-11D5-EBA1-F78EEEEEE983}\InprocServer32	37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6A238B78-8B9A-11D5-EBA1-F78EEEEEE983}\sm = 01b8ec350471bd332433eee476ebe1f3	37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3996	37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe

C:\Users\Admin\AppData\Local\Temp\37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.exe
"C:\Users\Admin\AppData\Local\Temp\37f7e5bcb79b1f3900cdf84881c712b3a69ba3459d01585c713f26ebbad82a83.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:3996
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3996 -s 712
  2⤵
  - Program crash
  PID:4844

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 3996 -ip 3996
1⤵
PID:4960

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

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Downloads

memory/3996-132-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

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memory/3996-133-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

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