a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75

General

Target

a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
Size

644KB
MD5

d4504eb761a13c9447a79a4edc6c5c80
SHA1

02b6b6f932028d2babee134e37f283c1e698eee0
SHA256

a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75
SHA512

f6b8d04b7f4f9332d62557f830319eb9f45d77d75ecaacc89badf59f5e9dd0a3f33a3477bf6a9d49eec733025adbedd8baa523f23210c2a3f660ecd3497eb036

Score

10^/10

adware persistence stealer

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe"	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,"	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe

Modifies system executable filetype association 2 TTPs 1 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1042

Processes:

a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\drivers\\spools.exe \"%1\" %*"	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe

Drops file in Drivers directory 2 IoCs

Processes:

a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe

description	ioc	process
File created	C:\Windows\SysWOW64\drivers\spools.exe	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened for modification	C:\Windows\SysWOW64\drivers\spools.exe	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe

Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe"	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\cftmon.exe"	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe"	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\cftmon.exe"	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe

Enumerates connected drives 3 TTPs 20 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe

description	ioc	process
File opened (read-only)	\??\S:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\H:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\I:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\K:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\Q:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\R:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\U:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\W:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\X:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\F:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\G:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\M:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\N:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\P:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\J:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\O:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\T:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\E:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\L:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
File opened (read-only)	\??\V:	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe

Installs/modifies Browser Helper Object 2 TTPs
BHOs are DLL modules which act as plugins for Internet Explorer.
stealer adware

Modify Registry
T1112

Browser Extensions
T1176

Modifies WinLogon 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UIHost = "logonui.exe"	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe

Modifies registry class 1 IoCs

Processes:

a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\drivers\\spools.exe \"%1\" %*"	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe

description	pid	process	target process
PID 1104 wrote to memory of 1072	1104	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe	reg.exe
PID 1104 wrote to memory of 1072	1104	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe	reg.exe
PID 1104 wrote to memory of 1072	1104	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe	reg.exe
PID 1104 wrote to memory of 1072	1104	a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe	reg.exe

C:\Users\Admin\AppData\Local\Temp\a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe
"C:\Users\Admin\AppData\Local\Temp\a31a07fbb36a5aff18ef3d2610f27e9f8b556fb91b51bc02533f17a49ce6aa75.exe"
1⤵
- Modifies WinLogon for persistence
- Modifies system executable filetype association
- Drops file in Drivers directory
- Adds Run key to start application
- Enumerates connected drives
- Modifies WinLogon
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1104

C:\Windows\SysWOW64\reg.exe
reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects" /f
2⤵
PID:1072

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

2

T1004

Change Default File Association

1

T1042

Registry Run Keys / Startup Folder

2

T1060

Browser Extensions

1

T1176

Privilege Escalation

Defense Evasion

Modify Registry

6

T1112

Credential Access

Discovery

Query Registry

1

T1012

Peripheral Device Discovery

1

T1120

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1072-60-0x0000000000000000-mapping.dmp

Download
memory/1104-61-0x0000000076E11000-0x0000000076E13000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads