e1952f7e0438383a6e03d29a94935967d9b1b154b5d9130e172143765e5db65c

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
29-12-2023 21:24

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General

Target

045f7c146c0b486c41124092ffcf0fbd.dll
Size

236KB
MD5

045f7c146c0b486c41124092ffcf0fbd
SHA1

004a85a267644151807a2e60d5d55c38eb5af14c
SHA256

e1952f7e0438383a6e03d29a94935967d9b1b154b5d9130e172143765e5db65c
SHA512

8d1a4b12f675bf0535169346d2dfc8f648a12f538805e0c521e70dd02b1e9caf669720075995c449c5e3c12cee133c501e9d6a4bb0d0c4479a8d4108dd173683
SSDEEP

3072:3F24fliN+7XlmZKxbLYH1rhAwHL5K2W5QVgxwkF7:3F24flic7X8ZibLYHFhAkKZYgn7

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\ana = "{29cba8e9-a143-f698-b254-a14320613cdf}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2092	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{29cba8e9-a143-f698-b254-a14320613cdf}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{29cba8e9-a143-f698-b254-a14320613cdf}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{29cba8e9-a143-f698-b254-a14320613cdf}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{29cba8e9-a143-f698-b254-a14320613cdf}\InprocServer32\ = "C:\\Windows\\SysWow64\\viv.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{29cba8e9-a143-f698-b254-a14320613cdf}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2092	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2092	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2092	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2976 wrote to memory of 2092	2976	rundll32.exe	28
PID 2976 wrote to memory of 2092	2976	rundll32.exe	28
PID 2976 wrote to memory of 2092	2976	rundll32.exe	28
PID 2976 wrote to memory of 2092	2976	rundll32.exe	28
PID 2976 wrote to memory of 2092	2976	rundll32.exe	28
PID 2976 wrote to memory of 2092	2976	rundll32.exe	28
PID 2976 wrote to memory of 2092	2976	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\045f7c146c0b486c41124092ffcf0fbd.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2976
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\045f7c146c0b486c41124092ffcf0fbd.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:2092

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\nan.dll

Filesize
625KB

MD5
95e2376b3323f062eb562b8586d0f14a

SHA1
453d4c3bf4a489433b593420a37bbffb7749875a

SHA256
bd3fa8750123d00aa0967fba44372c46ea002681da9c9b77a4f9261553e26017

SHA512
b898603d07a49237e4dfc6872d5caa7616bae1258926f10e66c4d3f0d81cccefac1e844395b65bb1f308fbc022061b52e51f60658d0a546c04b365b3428cc87d

Download Submit
memory/2092-0-0x0000000000180000-0x00000000001C4000-memory.dmp

Filesize
272KB

Download
memory/2092-1-0x0000000000180000-0x00000000001C4000-memory.dmp

Filesize
272KB

Download
memory/2092-9-0x0000000075D80000-0x0000000075E20000-memory.dmp

Filesize
640KB

Download
memory/2092-10-0x0000000000180000-0x00000000001C4000-memory.dmp

Filesize
272KB

Download
memory/2092-11-0x0000000075D80000-0x0000000075E20000-memory.dmp

Filesize
640KB

Download