e2af3ab76ab4ce881b70734af88cb39fc5860520cebaa5bf41466811507646e1

Analysis

max time kernel
118s
max time network
124s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
24-12-2023 17:05

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General

Target

07554c44e75203f20a8891e8ccba35eb.dll
Size

230KB
MD5

07554c44e75203f20a8891e8ccba35eb
SHA1

1e7451ec593ea0ec9743a659e3b9d926cba76fe0
SHA256

e2af3ab76ab4ce881b70734af88cb39fc5860520cebaa5bf41466811507646e1
SHA512

a28e80048734d927001667e1a05cf65eef8f2f6e1697042a887e5bae6f099d31021b5556a3003ec73fc4bc57a0d91654ded357ea563ab73c773680e83849fedc
SSDEEP

1536:mdEvyJnUuBWGc/GnYAN6DfD7m+xSchBSQ2Ks9mfWlivU258lwg/VGkGOwikleijB:iQyPWGcuYD7pFDkmvUEH8bwikwq

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\ial = "{4277b3f0-caff-1f44-db00-caff3b78e4d8}"	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
2932	rundll32.exe
2932	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\vny.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\vny.dll	rundll32.exe
File created	C:\Windows\SysWOW64\hzk.dll	rundll32.exe
File created	C:\Windows\SysWOW64\dvg.dll	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4277b3f0-caff-1f44-db00-caff3b78e4d8}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4277b3f0-caff-1f44-db00-caff3b78e4d8}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4277b3f0-caff-1f44-db00-caff3b78e4d8}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4277b3f0-caff-1f44-db00-caff3b78e4d8}\InprocServer32\ = "C:\\Windows\\SysWow64\\dvg.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4277b3f0-caff-1f44-db00-caff3b78e4d8}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2932	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1940 wrote to memory of 2932	1940	rundll32.exe	28
PID 1940 wrote to memory of 2932	1940	rundll32.exe	28
PID 1940 wrote to memory of 2932	1940	rundll32.exe	28
PID 1940 wrote to memory of 2932	1940	rundll32.exe	28
PID 1940 wrote to memory of 2932	1940	rundll32.exe	28
PID 1940 wrote to memory of 2932	1940	rundll32.exe	28
PID 1940 wrote to memory of 2932	1940	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\07554c44e75203f20a8891e8ccba35eb.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1940
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\07554c44e75203f20a8891e8ccba35eb.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 use of SetWindowsHookEx
  PID:2932

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\hzk.dll

Filesize
896KB

MD5
1539bd1f52396ebae1446d1f6a807387

SHA1
0c4f0dbb65ba6fc44378c879f7cde8a82cc30fc5

SHA256
6509cbe1663daca0eb4a2f58305f40afa7c846f4dce60c1f11d7ac63ec1d477a

SHA512
4612cf3cd384a04eb67ae3dc1bcb4e7ee5a7a1dc5486a5833b22483a6ab54ddec65e3566062676a0c9d625d41a972d146af3aff806ef2f29edec1e78e86f46d1

Download Submit
\Windows\SysWOW64\vny.dll

Filesize
625KB

MD5
95e2376b3323f062eb562b8586d0f14a

SHA1
453d4c3bf4a489433b593420a37bbffb7749875a

SHA256
bd3fa8750123d00aa0967fba44372c46ea002681da9c9b77a4f9261553e26017

SHA512
b898603d07a49237e4dfc6872d5caa7616bae1258926f10e66c4d3f0d81cccefac1e844395b65bb1f308fbc022061b52e51f60658d0a546c04b365b3428cc87d

Download Submit
memory/2932-0-0x00000000001C0000-0x0000000000202000-memory.dmp

Filesize
264KB

Download
memory/2932-10-0x00000000776F0000-0x0000000077800000-memory.dmp

Filesize
1.1MB

Download
memory/2932-11-0x00000000776F0000-0x0000000077800000-memory.dmp

Filesize
1.1MB

Download
memory/2932-14-0x00000000001C0000-0x0000000000202000-memory.dmp

Filesize
264KB

Download
memory/2932-13-0x0000000077160000-0x0000000077200000-memory.dmp

Filesize
640KB

Download
memory/2932-15-0x00000000776F0000-0x0000000077800000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads