28af5a08570f66dab16d6cf5f4178382e98a56027ff27be20f775dbfd996538c

Analysis

max time kernel
170s
max time network
174s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
20-10-2022 09:06

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General

Target

28af5a08570f66dab16d6cf5f4178382e98a56027ff27be20f775dbfd996538c.dll
Size

63KB
MD5

4d3cdd98907dc08f9ee4ac83eb4bebf0
SHA1

cfff8917ee97086b0c60c63150e14d391daffeae
SHA256

28af5a08570f66dab16d6cf5f4178382e98a56027ff27be20f775dbfd996538c
SHA512

d42e53ddf9982fef9267bbdb9653ff1398d23b6e05e17944f21ea96fb0bdcd9d19ea36ae7782dada443658f6d1a877a59679039ef7e5ac9ff1a3efe841fdd667
SSDEEP

384:NOr5NKZ2ZktoAXUK+B3880X11mK6eKm+3hrruK0Lgz8j0n6d8OE6xf0zbJ6HYY8t:0r5ov+38Zl1mK6el+hrR0L/rqbI/G

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\{7A041F13-A111-12A3-B0CF-F99818AA68A7}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{7A041F13-A111-12A3-B0CF-F99818AA68A7}\ = "zxmsdwin.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\{7A041F13-A111-12A3-B0CF-F99818AA68A7}\InprocServer32\ = "C:\\Windows\\SysWow64\\zxmsdwin.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7A041F13-A111-12A3-B0CF-F99818AA68A7}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7A041F13-A111-12A3-B0CF-F99818AA68A7}\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\{7A041F13-A111-12A3-B0CF-F99818AA68A7}	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1244	rundll32.exe
1244	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1244	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4140 wrote to memory of 1244	4140	rundll32.exe	84
PID 4140 wrote to memory of 1244	4140	rundll32.exe	84
PID 4140 wrote to memory of 1244	4140	rundll32.exe	84
PID 1244 wrote to memory of 1064	1244	rundll32.exe	85
PID 1244 wrote to memory of 1064	1244	rundll32.exe	85
PID 1244 wrote to memory of 1064	1244	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\28af5a08570f66dab16d6cf5f4178382e98a56027ff27be20f775dbfd996538c.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4140
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\28af5a08570f66dab16d6cf5f4178382e98a56027ff27be20f775dbfd996538c.dll,#1
  2⤵
  - Installs/modifies Browser Helper Object
  - Drops file in System32 directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1244
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\~DFD240614890.bat
    3⤵
    PID:1064

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\~DFD240614890.bat

Filesize
121B

MD5
09517fc62284f33e877a276463580bd1

SHA1
0b14fe1db4493818f9de0bf2a56ee5370b8d479a

SHA256
6cc6bbb1f3f754b6894d84130f5f2d86569ac3a603e1632d3cefa028f22b6238

SHA512
1b924dd216d0f38199cc6df215e65ff260aa48fa37aa620dabcbc616f434643bd1f2e617d66b14bd52900214148741565128ba9589782ba582fd7308369f4a4d

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