d278e56bd56be175d2c968849e730737b6fce98916dee394458d6c7fc96326f5

Analysis

max time kernel
141s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
24-06-2024 02:06

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General

Target

03fa1c417f45849b227747a39942e373.dll
Size

231KB
MD5

03fa1c417f45849b227747a39942e373
SHA1

0a2c4597f60da37cfe42022be992ffbd725f64d8
SHA256

d278e56bd56be175d2c968849e730737b6fce98916dee394458d6c7fc96326f5
SHA512

d140b65b507285c1b33c316981660b539e9435a65e755c22c9c3d031f657929b160e714ef41657fcf9997b91f70ac5616beb468c6a4a2314cfb6200a1677a221
SSDEEP

1536:7hnfLI5eA7wY43rUD8v0mf9o4uoE7hYoQN44n3Plx3G+5bb/VGMGbwikjKZ6xs/Q:FMF7X43r79o4TQ14nbGMbLmwikjnF

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\casqwrs = "{6e8e832e-e606-3b5b-f717-e6060ba6b216}"	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
3808	rundll32.exe
3808	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\bzrpvqr.dll	rundll32.exe
File created	C:\Windows\SysWOW64\xvnlrmn.dll	rundll32.exe
File created	C:\Windows\SysWOW64\pnfdjef.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\pnfdjef.dll	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6e8e832e-e606-3b5b-f717-e6060ba6b216}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6e8e832e-e606-3b5b-f717-e6060ba6b216}\InprocServer32\ = "C:\\Windows\\SysWow64\\xvnlrmn.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6e8e832e-e606-3b5b-f717-e6060ba6b216}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6e8e832e-e606-3b5b-f717-e6060ba6b216}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6e8e832e-e606-3b5b-f717-e6060ba6b216}\	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3808	rundll32.exe
3808	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3808	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3808	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1148 wrote to memory of 3808	1148	rundll32.exe	88
PID 1148 wrote to memory of 3808	1148	rundll32.exe	88
PID 1148 wrote to memory of 3808	1148	rundll32.exe	88

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\03fa1c417f45849b227747a39942e373.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1148
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\03fa1c417f45849b227747a39942e373.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:3808

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4360,i,9746875443948590908,1444894342962555245,262144 --variations-seed-version --mojo-platform-channel-handle=3756 /prefetch:8
1⤵
PID:1780

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

C:\Windows\SysWOW64\bzrpvqr.dll

Filesize
625KB

MD5
eccf28d7e5ccec24119b88edd160f8f4

SHA1
98509587a3d37a20b56b50fd57f823a1691a034c

SHA256
820c83c0533cfce2928e29edeaf6c255bc19ac9718b25a5656d99ffac30a03d6

SHA512
c1c94bbb781625b2317f0a8178d3a10d891fb71bca8f82cd831c484e8ab125301b82a14fe2ff070dc99a496cc00234300fa5536401018c40d49d44ae89409670

Download Submit
C:\Windows\SysWOW64\pnfdjef.dll

Filesize
478KB

MD5
e99416267b61f52fa5ab994019efd359

SHA1
86d31eae707db7fe51d2556394fcf0e8e9f6b0fd

SHA256
768c286674371564b5e6095edb56e0a4231f341be895da69cfccca5160029774

SHA512
0a1c7579a9c787c2c1bef35f0660e72e74b42824e14ebea63b87ed25ddaf107e3746567bb431cab41a2f6719fad2c22d96e0715a1fe085d75805d7d66f7f05ae

Download Submit
memory/3808-12-0x0000000075B4E000-0x0000000075B4F000-memory.dmp

Filesize
4KB

Download
memory/3808-13-0x0000000075B30000-0x0000000075BAA000-memory.dmp

Filesize
488KB

Download
memory/3808-14-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3808-16-0x0000000075B30000-0x0000000075BAA000-memory.dmp

Filesize
488KB

Download
memory/3808-17-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download