32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751

Analysis

max time kernel
95s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
30/10/2022, 08:33

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General

Target

32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751.exe
Size

101KB
MD5

5c679d7fedebcddbc49c41c26d8ae130
SHA1

4e9aac90acb05e45b535a801186cb6ded17891fd
SHA256

32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751
SHA512

e0409287484b15ba8c735b5241f8a0b47327976e6b09e4d7fc47fa3b7f37a80234a38c255572e0f167ee208fa5d116954f4c682620101abe83ddc156e38a2408
SSDEEP

3072:ajbgbntDbgbntDbgbntDbgbntDbgbntDbgbntW5n2ThWsNexPnCrnd:ajbSxbSxbSxbSxbSxbSankP+6bd

Score

10^/10

adware persistence stealer upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,"	32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe"	32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751.exe

Drops file in Drivers directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\drivers\winupdat.exe	32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751.exe
File opened for modification	C:\Windows\SysWOW64\drivers\winupdat.exe	32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Schedule\ImagePath = "C:\\Windows\\system32\\drivers\\winupdat.exe"	32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4100-132-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4100-134-0x0000000000400000-0x0000000000414000-memory.dmp	upx

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\winupdat.exe"	32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\Local Settings\\Application Data\\explores.exe"	32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\winupdat.exe"	32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\Local Settings\\Application Data\\explores.exe"	32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751.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	reg.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{1FD49718-1D00-4B19-AF5F-070AF6D5D54C}	reg.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA}	reg.exe

Modifies WinLogon 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UIHost = "logonui.exe"	32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4100 wrote to memory of 1544	4100	32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751.exe	83
PID 4100 wrote to memory of 1544	4100	32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751.exe	83
PID 4100 wrote to memory of 1544	4100	32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751.exe	83

C:\Users\Admin\AppData\Local\Temp\32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751.exe
"C:\Users\Admin\AppData\Local\Temp\32cfd991ad5df58309fcee17895be18e2e0417ba5425fb3e94841f03216e9751.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:4100
- C:\Windows\SysWOW64\reg.exe
  reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects" /f
  2⤵
  - Installs/modifies Browser Helper Object
  PID:1544

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Browser Extensions

T1176

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4100-132-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4100-134-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads