33209ed2c1a463dd55d4c4136b112d1e96d1cdd415831f026276c2d69880d18c

Analysis

max time kernel
120s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
05/03/2024, 05:48

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General

Target

b3f10cb3daefe5045bd9ce3a76fecb0e.dll
Size

268KB
MD5

b3f10cb3daefe5045bd9ce3a76fecb0e
SHA1

7bfe053c0c2ea8aa0c58b8849b46f52c14a6df66
SHA256

33209ed2c1a463dd55d4c4136b112d1e96d1cdd415831f026276c2d69880d18c
SHA512

c6ad869bd1f8bb3032e06f395442c06aa52cea572e40bead2c729769759fe9c4fe7fd1034843dfa587207358dd568d98596a3aa6ce5a492a3782480576151715
SSDEEP

3072:aS3YDDOrYvppqDMyzJ7zXhsGI4lqwGFtfw4dvmV0cT1ptGvx/BCc/B6tBB75lcM:cKEpUOjtm+cT1uCYuBgM

Score

10^/10

persistence

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 1 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\bxlrvps = "{2075D3CE-E243-4ABE-8820-05D68B84DC2B}"	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{2075D3CE-E243-4ABE-8820-05D68B84DC2B}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{2075D3CE-E243-4ABE-8820-05D68B84DC2B}\InProcServer32\ = "C:\\Windows\\bxlrvps.dll"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{2075D3CE-E243-4ABE-8820-05D68B84DC2B}\InProcServer32	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2992 wrote to memory of 1732	2992	rundll32.exe	28
PID 2992 wrote to memory of 1732	2992	rundll32.exe	28
PID 2992 wrote to memory of 1732	2992	rundll32.exe	28
PID 2992 wrote to memory of 1732	2992	rundll32.exe	28
PID 2992 wrote to memory of 1732	2992	rundll32.exe	28
PID 2992 wrote to memory of 1732	2992	rundll32.exe	28
PID 2992 wrote to memory of 1732	2992	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b3f10cb3daefe5045bd9ce3a76fecb0e.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2992
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\b3f10cb3daefe5045bd9ce3a76fecb0e.dll,#1
  2⤵
  - Adds autorun key to be loaded by Explorer.exe on startup
  - Modifies registry class
  PID:1732

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

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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