56f5599e51c38c3b6c737c76371eae690161ece9d86ac6f1dfda29a3f6f5495f

Analysis

max time kernel
167s
max time network
182s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
01/12/2022, 04:23

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General

Target

56f5599e51c38c3b6c737c76371eae690161ece9d86ac6f1dfda29a3f6f5495f.dll
Size

522KB
MD5

0d01543c3c3a458c350c1d0d30f76020
SHA1

143dbe8a681477ebbd531182dc8539f5e0ad1afe
SHA256

56f5599e51c38c3b6c737c76371eae690161ece9d86ac6f1dfda29a3f6f5495f
SHA512

67e24b287c7bc5d5b40fc80c9e0bff0cde9449212af15b63859396e78e22037f5ddaefc70c75cd7f8b39c0250bacafeafa55ce0445f8bf75ef3cbad878182e16
SSDEEP

384:EpdNjtU2OEunQA7poj9cQfSWMm9pi4NTHsWItqGpzMAW/wko03ynnnnnnnnnnnnC:EpdqnLMKChjTHsWItr8/wkD7j

Score

6^/10

adware stealer

Malware Config

Signatures

Installs/modifies Browser Helper Object 2 TTPs 2 IoCs

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

stealer adware

Modify Registry

T1112

Browser Extensions

T1176

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{4490415F-65F8-B5C5-D8BA-9405FB120544}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{4490415F-65F8-B5C5-D8BA-9405FB120544}\ = "yzztdmsn.dll"	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\verclsid.exe	rundll32.exe

Modifies registry class 6 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4490415F-65F8-B5C5-D8BA-9405FB120544}\InprocServer32\ = "C:\\Windows\\SysWow64\\yzztdmsn.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4490415F-65F8-B5C5-D8BA-9405FB120544}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4490415F-65F8-B5C5-D8BA-9405FB120544}\InprocServer32	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4490415F-65F8-B5C5-D8BA-9405FB120544}	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2348	rundll32.exe
2348	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2000 wrote to memory of 2348	2000	rundll32.exe	83
PID 2000 wrote to memory of 2348	2000	rundll32.exe	83
PID 2000 wrote to memory of 2348	2000	rundll32.exe	83
PID 2348 wrote to memory of 392	2348	rundll32.exe	84
PID 2348 wrote to memory of 392	2348	rundll32.exe	84
PID 2348 wrote to memory of 392	2348	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\56f5599e51c38c3b6c737c76371eae690161ece9d86ac6f1dfda29a3f6f5495f.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2000
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\56f5599e51c38c3b6c737c76371eae690161ece9d86ac6f1dfda29a3f6f5495f.dll,#1
  2⤵
  - Installs/modifies Browser Helper Object
  - Drops file in System32 directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2348
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\~DFD240600234.bat
    3⤵
    PID:392

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Browser Extensions

T1176

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\~DFD240600234.bat

Filesize
121B

MD5
09517fc62284f33e877a276463580bd1

SHA1
0b14fe1db4493818f9de0bf2a56ee5370b8d479a

SHA256
6cc6bbb1f3f754b6894d84130f5f2d86569ac3a603e1632d3cefa028f22b6238

SHA512
1b924dd216d0f38199cc6df215e65ff260aa48fa37aa620dabcbc616f434643bd1f2e617d66b14bd52900214148741565128ba9589782ba582fd7308369f4a4d

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