77e27e4809af5ab2dd4969bad60a270bb16539ba3f16888ea4f70838456f17fd

Analysis

max time kernel
150s
max time network
122s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
30/12/2023, 20:52

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General

Target

1c3c9e2192118703a03bb9cf73557b9e.dll
Size

523KB
MD5

1c3c9e2192118703a03bb9cf73557b9e
SHA1

fd5febbacdabc74be7182325040491e102cffdb6
SHA256

77e27e4809af5ab2dd4969bad60a270bb16539ba3f16888ea4f70838456f17fd
SHA512

a373885ae5aaa5d813141ff72e2979d18e0a642e575a3426c0b14b5415cde0911ae8461189bc6d8232d0d6c7b0336bfc8dfe4a9e671fa4aca31268452a1bb87d
SSDEEP

384:POr5NKZ2+DEU0RaSChzfiVLm91+wkoexcj1hhN1HHjfNrzwm3gDLzfXDYYWbRt:Gr5oDdhjiR+lj1DNv/3SHfXbWb

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\{3319A1F1-9410-9654-3201-345FFA349133}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{3319A1F1-9410-9654-3201-345FFA349133}\ = "zywmcime.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
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3319A1F1-9410-9654-3201-345FFA349133}\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\{3319A1F1-9410-9654-3201-345FFA349133}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3319A1F1-9410-9654-3201-345FFA349133}\InprocServer32\ = "C:\\Windows\\SysWow64\\zywmcime.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3319A1F1-9410-9654-3201-345FFA349133}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2924	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2448 wrote to memory of 2924	2448	rundll32.exe	28
PID 2448 wrote to memory of 2924	2448	rundll32.exe	28
PID 2448 wrote to memory of 2924	2448	rundll32.exe	28
PID 2448 wrote to memory of 2924	2448	rundll32.exe	28
PID 2448 wrote to memory of 2924	2448	rundll32.exe	28
PID 2448 wrote to memory of 2924	2448	rundll32.exe	28
PID 2448 wrote to memory of 2924	2448	rundll32.exe	28
PID 2924 wrote to memory of 2160	2924	rundll32.exe	29
PID 2924 wrote to memory of 2160	2924	rundll32.exe	29
PID 2924 wrote to memory of 2160	2924	rundll32.exe	29
PID 2924 wrote to memory of 2160	2924	rundll32.exe	29

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\1c3c9e2192118703a03bb9cf73557b9e.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2448
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\1c3c9e2192118703a03bb9cf73557b9e.dll,#1
  2⤵
  - Installs/modifies Browser Helper Object
  - Drops file in System32 directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2924
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c C:\Users\Admin\AppData\Local\Temp\~DFD259411691.bat
    3⤵
    PID:2160

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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\~DFD259411691.bat

Filesize
121B

MD5
09517fc62284f33e877a276463580bd1

SHA1
0b14fe1db4493818f9de0bf2a56ee5370b8d479a

SHA256
6cc6bbb1f3f754b6894d84130f5f2d86569ac3a603e1632d3cefa028f22b6238

SHA512
1b924dd216d0f38199cc6df215e65ff260aa48fa37aa620dabcbc616f434643bd1f2e617d66b14bd52900214148741565128ba9589782ba582fd7308369f4a4d

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