f4384fc672ff771fac3ff9e8dd92b98fec6c81ee2daefc204b0f3e41045e45b5

Analysis

max time kernel
253s
max time network
280s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
03/12/2022, 03:00

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General

Target

f4384fc672ff771fac3ff9e8dd92b98fec6c81ee2daefc204b0f3e41045e45b5.dll
Size

230KB
MD5

fd5c693e77c77bf67d1242f9463a429c
SHA1

62f1876fc9453dfd2da2f8ee79c4063d8710047d
SHA256

f4384fc672ff771fac3ff9e8dd92b98fec6c81ee2daefc204b0f3e41045e45b5
SHA512

c10912e5ed1f00baf2cecd716147d53fb563138112a8203dc9ed9b1d3baba6e46b7fd5c88ef73da6bd1427822cd80b94be5f94c4fba31d461970552636b50fa0
SSDEEP

1536:rlX3piGV13fYn/yF73wVComfIwIZqkbhwaQVTfOW0lsEr+5gL/lG8G8wik5iN:JN13gnOZIwNo4fO7rMgbNwik5O

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

T1060

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\odwtqxued = "{af4549c2-27cd-7c12-38de-27cdc14a15f5}"	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
3560	rundll32.exe
3560	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\bqjgdkhrq.dll	rundll32.exe
File created	C:\Windows\SysWOW64\ncvspwtdc.dll	rundll32.exe
File created	C:\Windows\SysWOW64\jyrolspzy.dll	rundll32.exe
File created	C:\Windows\SysWOW64\bqjgdkhrq.dll	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{af4549c2-27cd-7c12-38de-27cdc14a15f5}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{af4549c2-27cd-7c12-38de-27cdc14a15f5}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{af4549c2-27cd-7c12-38de-27cdc14a15f5}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{af4549c2-27cd-7c12-38de-27cdc14a15f5}\InprocServer32\ = "C:\\Windows\\SysWow64\\jyrolspzy.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{af4549c2-27cd-7c12-38de-27cdc14a15f5}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3560	rundll32.exe
3560	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3560	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3560	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2760 wrote to memory of 3560	2760	rundll32.exe	80
PID 2760 wrote to memory of 3560	2760	rundll32.exe	80
PID 2760 wrote to memory of 3560	2760	rundll32.exe	80

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f4384fc672ff771fac3ff9e8dd92b98fec6c81ee2daefc204b0f3e41045e45b5.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2760
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f4384fc672ff771fac3ff9e8dd92b98fec6c81ee2daefc204b0f3e41045e45b5.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:3560

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\bqjgdkhrq.dll

Filesize
478KB

MD5
e99416267b61f52fa5ab994019efd359

SHA1
86d31eae707db7fe51d2556394fcf0e8e9f6b0fd

SHA256
768c286674371564b5e6095edb56e0a4231f341be895da69cfccca5160029774

SHA512
0a1c7579a9c787c2c1bef35f0660e72e74b42824e14ebea63b87ed25ddaf107e3746567bb431cab41a2f6719fad2c22d96e0715a1fe085d75805d7d66f7f05ae

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C:\Windows\SysWOW64\ncvspwtdc.dll

Filesize
625KB

MD5
eccf28d7e5ccec24119b88edd160f8f4

SHA1
98509587a3d37a20b56b50fd57f823a1691a034c

SHA256
820c83c0533cfce2928e29edeaf6c255bc19ac9718b25a5656d99ffac30a03d6

SHA512
c1c94bbb781625b2317f0a8178d3a10d891fb71bca8f82cd831c484e8ab125301b82a14fe2ff070dc99a496cc00234300fa5536401018c40d49d44ae89409670

Download Submit