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
behavioral1/memory/2924-0-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral1/files/0x000d00000001230f-5.dat	UPX
behavioral1/memory/2924-7-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral1/memory/2924-11-0x0000000000400000-0x0000000000414000-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
behavioral1/memory/2924-0-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/files/0x000d00000001230f-5.dat	upx
behavioral1/memory/2924-7-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/memory/2924-11-0x0000000000400000-0x0000000000414000-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-1-5-21-2721934792-624042501-2768869379-1000\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
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\winupdat.exe"	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe

Installs/modifies Browser Helper Object 2 TTPs 4 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	reg.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{18DF081C-E8AD-4283-A596-FA578C2EBDC3}	reg.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{72853161-30C5-4D22-B7F9-0BBC1D38A37E}	reg.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{B4F3A835-0E21-4959-BA22-42B3008E02FF}	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 4 IoCs

description	pid	Process	procid_target
PID 2924 wrote to memory of 2788	2924	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe	29
PID 2924 wrote to memory of 2788	2924	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe	29
PID 2924 wrote to memory of 2788	2924	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe	29
PID 2924 wrote to memory of 2788	2924	66a6321849332dc569534018bbcdfa4714b9cb0a4980b53e92391bab98dcd467.exe	29

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:2924
- C:\Windows\SysWOW64\reg.exe
  reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects" /f
  2⤵
  - Installs/modifies Browser Helper Object
  PID:2788

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 501KB
SHA256 ddef1816daa631bf5a33eb9fe40f152fe5c008af450b4cf68320464669ef4320
MD5 38e5589e54a3424523a6f31edc9c2e8f
SHA1 96a156b786883dece75c4482cece43f43fec3a06
SHA512 05c9ce67849a63eb67a027dd20057db8a3f6e218abec372f47ddee30f2d7bed768955fe94d0b076284580062d8e1b563076c2ecbbb4b40df33f5126f41c6033c
SSDEEP 12288:aDRZeeeex4DepGJeeeeeVu5UGaXl0DEueeQ+Tw:aDRZeeeex4DeIJeeeeeVu5UGyl0DEueH
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2924-0-0x0000000000400000-0x0000000000414000-memory.dmp

Download

memory/2924-7-0x0000000000400000-0x0000000000414000-memory.dmp

Download

memory/2924-11-0x0000000000400000-0x0000000000414000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads