e0ddbe637853a9772a6be20de1113deb7bccf2e989c11d2523bbc45b43bd0a61

Analysis

max time kernel
117s
max time network
124s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
03/01/2024, 15:21

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target

0095d72c342bc49a281c41908d205d82.dll
Size

240KB
MD5

0095d72c342bc49a281c41908d205d82
SHA1

9ed0d7cacc35c8ed7735fc4a0a71a1965cdedb56
SHA256

e0ddbe637853a9772a6be20de1113deb7bccf2e989c11d2523bbc45b43bd0a61
SHA512

69325fce7e529ad463430c4106031e75360fcfb452ba700668341aeec9da71a0cc978b93b87761c1e821c859e516115e61a6072805c37d2a636a8eeb60416b11
SSDEEP

3072:YQ9aMPTcXSi3SUzKT7H9b3K/aEd2c2s7rtkz:dcdpeT7BK/Lcc9Q

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\cssew = "{6482832c-ec0a-315f-fd1b-ec0a0ba432f1}"	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
3064	rundll32.exe
3064	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\pffrj.dll	rundll32.exe
File created	C:\Windows\SysWOW64\brrdv.dll	rundll32.exe
File created	C:\Windows\SysWOW64\xnnzr.dll	rundll32.exe
File created	C:\Windows\SysWOW64\pffrj.dll	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6482832c-ec0a-315f-fd1b-ec0a0ba432f1}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6482832c-ec0a-315f-fd1b-ec0a0ba432f1}\InprocServer32\ = "C:\\Windows\\SysWow64\\xnnzr.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6482832c-ec0a-315f-fd1b-ec0a0ba432f1}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6482832c-ec0a-315f-fd1b-ec0a0ba432f1}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6482832c-ec0a-315f-fd1b-ec0a0ba432f1}\	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3064	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2188 wrote to memory of 3064	2188	rundll32.exe	28
PID 2188 wrote to memory of 3064	2188	rundll32.exe	28
PID 2188 wrote to memory of 3064	2188	rundll32.exe	28
PID 2188 wrote to memory of 3064	2188	rundll32.exe	28
PID 2188 wrote to memory of 3064	2188	rundll32.exe	28
PID 2188 wrote to memory of 3064	2188	rundll32.exe	28
PID 2188 wrote to memory of 3064	2188	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\0095d72c342bc49a281c41908d205d82.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2188
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\0095d72c342bc49a281c41908d205d82.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:3064

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

Loading Replay Monitor...

Downloads

\Windows\SysWOW64\brrdv.dll

Filesize
1.1MB

MD5
9b98d47916ead4f69ef51b56b0c2323c

SHA1
290a80b4ded0efc0fd00816f373fcea81a521330

SHA256
96e0ae104c9662d0d20fdf59844c2d18334e5847b6c4fc7f8ce4b3b87f39887b

SHA512
68b67021f228d8d71df4deb0b6388558b2f935a6aa466a12199cd37ada47ee588ea407b278d190d3a498b0ef3f5f1a2573a469b7ea5561ab2e7055c45565fe94

Download Submit
\Windows\SysWOW64\pffrj.dll

Filesize
625KB

MD5
95e2376b3323f062eb562b8586d0f14a

SHA1
453d4c3bf4a489433b593420a37bbffb7749875a

SHA256
bd3fa8750123d00aa0967fba44372c46ea002681da9c9b77a4f9261553e26017

SHA512
b898603d07a49237e4dfc6872d5caa7616bae1258926f10e66c4d3f0d81cccefac1e844395b65bb1f308fbc022061b52e51f60658d0a546c04b365b3428cc87d

Download Submit
memory/3064-0-0x0000000000160000-0x00000000001A4000-memory.dmp

Filesize
272KB

Download
memory/3064-10-0x00000000768C0000-0x00000000769D0000-memory.dmp

Filesize
1.1MB

Download
memory/3064-11-0x00000000762E0000-0x0000000076380000-memory.dmp

Filesize
640KB

Download
memory/3064-13-0x0000000000160000-0x00000000001A4000-memory.dmp

Filesize
272KB

Download
memory/3064-14-0x00000000768C0000-0x00000000769D0000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads