e8a94486d64bd42804721cce0421a15e1e8cb20f17f365b5c09cbfee73d66f74

Analysis

max time kernel
119s
max time network
129s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
24/12/2023, 15:47

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General

Target

0445d0d8cb7a917f272f5f027c37f6fa.dll
Size

236KB
MD5

0445d0d8cb7a917f272f5f027c37f6fa
SHA1

fdd7d0317f02e60b1bf582a8f8a619cc18ec4bd4
SHA256

e8a94486d64bd42804721cce0421a15e1e8cb20f17f365b5c09cbfee73d66f74
SHA512

3e1aa6f01b6d27a15c78dcb9c07150a5d5f35aa6f52e5560cc64deaee416e98ba4a4d8fe708f4b21408686dfdf79d5dd1953f777e9b71ff4d56df7bdcf6dde9c
SSDEEP

1536:1dKaTHN2ymZ0ofa5uQm4V7HG8ldINh+RhFtFftCgpcGO5lPf/XG8GmGwktbC:1Y4tIQG8XAmbFfaGc1fawk1C

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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\oaezyoy = "{c643aa47-4ecb-9310-5fdc-4ecb22cf1372}"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2868	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c643aa47-4ecb-9310-5fdc-4ecb22cf1372}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c643aa47-4ecb-9310-5fdc-4ecb22cf1372}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c643aa47-4ecb-9310-5fdc-4ecb22cf1372}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c643aa47-4ecb-9310-5fdc-4ecb22cf1372}\InprocServer32\ = "C:\\Windows\\SysWow64\\jvzutjt.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c643aa47-4ecb-9310-5fdc-4ecb22cf1372}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2868	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2868	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2868	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2460 wrote to memory of 2868	2460	rundll32.exe	18
PID 2460 wrote to memory of 2868	2460	rundll32.exe	18
PID 2460 wrote to memory of 2868	2460	rundll32.exe	18
PID 2460 wrote to memory of 2868	2460	rundll32.exe	18
PID 2460 wrote to memory of 2868	2460	rundll32.exe	18
PID 2460 wrote to memory of 2868	2460	rundll32.exe	18
PID 2460 wrote to memory of 2868	2460	rundll32.exe	18

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\0445d0d8cb7a917f272f5f027c37f6fa.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2460
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\0445d0d8cb7a917f272f5f027c37f6fa.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:2868

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

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Downloads

\Windows\SysWOW64\bnrmlbl.dll

Filesize
98KB

MD5
e376f3fdf5149548ec986b4f788974b9

SHA1
f124d8b3d61457d186a917cb20543925cd2ca84b

SHA256
2ee400561c8d829cf619633dc657ecfe8871722a3d91aa1ef4e010078974cf2a

SHA512
93d2c9ed924eb7e73eb5a49624c40cab0bb7a1f40128891fa6cf31796be9ce99cacf91a35ed8617896c4e45497f68ca9c92cd39cd805d57b77b142d01868e1b5

Download Submit
memory/2868-0-0x0000000000250000-0x0000000000294000-memory.dmp

Filesize
272KB

Download
memory/2868-2-0x0000000000250000-0x0000000000294000-memory.dmp

Filesize
272KB

Download
memory/2868-9-0x0000000074DD0000-0x0000000074E70000-memory.dmp

Filesize
640KB

Download
memory/2868-10-0x0000000000250000-0x0000000000294000-memory.dmp

Filesize
272KB

Download
memory/2868-11-0x0000000074DD0000-0x0000000074E70000-memory.dmp

Filesize
640KB

Download