e9fa5d05d94727d7268b53818459d2dea55c5c3510212c741e229d59f1713163

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
25-12-2023 04:32

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General

Target

05585c8e35fb205ecd405dcb528ea078.dll
Size

236KB
MD5

05585c8e35fb205ecd405dcb528ea078
SHA1

7aba345c7ac1aae5f9cf8515b211ee2afee0d65b
SHA256

e9fa5d05d94727d7268b53818459d2dea55c5c3510212c741e229d59f1713163
SHA512

ee069f7720d0c7d1150996e088db6473664c30b76a86954642c9354eb34995f082788df1c1ec8cd3080dd7722a475e2a155efe24913e8a7148559f1bd28f5193
SSDEEP

1536:Iguo2K86vta10RJQYPIHL+D5IWhxRh/Ci4ucg3/+k5ltr+DRPG8Gz7wk+cQvMI:Go256vS0RJAL+lHPKi40+66iwkD0z

Score

10^/10

persistence

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\ecskg = "{e0aa0184-6822-bd77-7933-6822890c0256}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
912	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rpfxt.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\rpfxt.dll	rundll32.exe
File created	C:\Windows\SysWOW64\zxnfb.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\zxnfb.dll	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{e0aa0184-6822-bd77-7933-6822890c0256}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{e0aa0184-6822-bd77-7933-6822890c0256}\InprocServer32\ = "C:\\Windows\\SysWow64\\zxnfb.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{e0aa0184-6822-bd77-7933-6822890c0256}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{e0aa0184-6822-bd77-7933-6822890c0256}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{e0aa0184-6822-bd77-7933-6822890c0256}\	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
912	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	912	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
912	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 824 wrote to memory of 912	824	rundll32.exe	28
PID 824 wrote to memory of 912	824	rundll32.exe	28
PID 824 wrote to memory of 912	824	rundll32.exe	28
PID 824 wrote to memory of 912	824	rundll32.exe	28
PID 824 wrote to memory of 912	824	rundll32.exe	28
PID 824 wrote to memory of 912	824	rundll32.exe	28
PID 824 wrote to memory of 912	824	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\05585c8e35fb205ecd405dcb528ea078.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:824
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\05585c8e35fb205ecd405dcb528ea078.dll,#1
  2⤵
  - Adds autorun key to be loaded by Explorer.exe on startup
  - Loads dropped DLL
  - Drops file in System32 directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:912

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Windows\SysWOW64\rpfxt.dll

Filesize
129KB

MD5
5c51afc1ec40d200ed3c36cf9862f014

SHA1
2daf2519ef004f127eaf7728a36a4c4327dcf2f2

SHA256
2dc29161ca7b44c9dbbc6836fb49729bbe62bfe3863583798c2a8d8c0df52dff

SHA512
55fa92b5fea05ca77cbcf6fb5aea2237bae5f9fc8a9015d7e860747c30fccfac8a770c280ab506460228ad8e6959752a921f450f3f8668b84a1923aa43190be4

Download Submit
memory/912-0-0x0000000000180000-0x00000000001C4000-memory.dmp

Filesize
272KB

Download
memory/912-9-0x0000000077030000-0x00000000770D0000-memory.dmp

Filesize
640KB

Download
memory/912-6-0x0000000000180000-0x00000000001C4000-memory.dmp

Filesize
272KB

Download
memory/912-11-0x0000000077030000-0x00000000770D0000-memory.dmp

Filesize
640KB

Download
memory/912-10-0x0000000000180000-0x00000000001C4000-memory.dmp

Filesize
272KB

Download