66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467

General

Target
66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe
Size 480KB
Sample240413-1sjjsade2x
SHA256 66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467
MD5 d9f0fec51a1127f5a08188e4d8fd1358
SHA1 7a3066e9d74494965480897d9fbf77c295863e1c
SHA512 f0074fd31e54af922f6d1e36f5af433f46b01e0543c3840059bbeee1c543fd789346ca4b2d1c471cb48c85759be5c1936cc8ef9c48f13d3c5c11a6d15c6994c7
SSDEEP 12288:aDRZeeeex4DepGJeeeeeVu5UGaXl0DEueeQ+0:aDRZeeeex4DeIJeeeeeVu5UGyl0DEueT
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

adware persistence stealer upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe"	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,"	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3588-0-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/files/0x000a0000000233c1-5.dat	UPX
behavioral2/memory/3588-7-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/3588-9-0x0000000000400000-0x0000000000414000-memory.dmp	UPX

Drops file in Drivers directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\drivers\winupdat.exe	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe
File opened for modification	C:\Windows\SysWOW64\drivers\winupdat.exe	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Schedule\ImagePath = "C:\\Windows\\system32\\drivers\\winupdat.exe"	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3588-0-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/files/0x000a0000000233c1-5.dat	upx
behavioral2/memory/3588-7-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3588-9-0x0000000000400000-0x0000000000414000-memory.dmp	upx

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1132431369-515282257-1998160155-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\winupdat.exe"	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1132431369-515282257-1998160155-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\Local Settings\\Application Data\\explores.exe"	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\winupdat.exe"	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\Local Settings\\Application Data\\explores.exe"	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe

Installs/modifies Browser Helper Object 2 TTPs 3 IoCs

BHOs are DLL modules which act as plugins for Internet Explorer.

stealer adware

Modify Registry

T1112

Browser Extensions

T1176

description	ioc	Process
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA}	reg.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects	reg.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{1FD49718-1D00-4B19-AF5F-070AF6D5D54C}	reg.exe

Modifies WinLogon 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UIHost = "logonui.exe"	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3588 wrote to memory of 4060	3588	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe	87
PID 3588 wrote to memory of 4060	3588	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe	87
PID 3588 wrote to memory of 4060	3588	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe	87

C:\Users\Admin\AppData\Local\Temp\66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe
"C:\Users\Admin\AppData\Local\Temp\66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe"
1⤵
- Modifies WinLogon for persistence
- Drops file in Drivers directory
- Sets service image path in registry
- Adds Run key to start application
- Modifies WinLogon
- Suspicious use of WriteProcessMemory
PID:3588
- C:\Windows\SysWOW64\reg.exe
  reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects" /f
  2⤵
  - Installs/modifies Browser Helper Object
  PID:4060

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

4

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Winlogon Helper DLL

Browser Extensions

Privilege Escalation

Boot or Logon Autostart Execution

4

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Winlogon Helper DLL

2

T1547.004

Defense Evasion

Modify Registry

5

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

explores.exe

Path C:\Users\Admin\AppData\Local\explores.exe
Size 511KB
SHA256 d2c017f07e95e2cdada6f36f4ed7a75a9d399ceaae00b240bce4bdca9983a1d3
MD5 da64a4647eb4d86734b65285dd6aab72
SHA1 90504c2b232ec870362c6cccf4a408574b829fd5
SHA512 c78b5e529b761a54a5546a246c76fb0b87992d295fc338023d26199c83b63fb73c141c2e2f540b106ec74147580101e730d2704e8844b738cdd5497b38cca389
SSDEEP 12288:aDRZeeeex4DepGJeeeeeVu5UGaXl0DEueeQ+0JLsN0:aDRZeeeex4DeIJeeeeeVu5UGyl0DEuej
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3588-0-0x0000000000400000-0x0000000000414000-memory.dmp

Download

memory/3588-7-0x0000000000400000-0x0000000000414000-memory.dmp

Download

memory/3588-9-0x0000000000400000-0x0000000000414000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads