52831d2198afb6e9f624cea7bb9e7bec5b74fc22314380f4282d509e0f1c1d56

Analysis

max time kernel
151s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
07/11/2022, 07:16

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General

Target

52831d2198afb6e9f624cea7bb9e7bec5b74fc22314380f4282d509e0f1c1d56.dll
Size

24KB
MD5

08afb75035b9a9ac996aa7881a2002c4
SHA1

d88cd24c3071e7a980c9b92f08aa99582d3a3e3f
SHA256

52831d2198afb6e9f624cea7bb9e7bec5b74fc22314380f4282d509e0f1c1d56
SHA512

b4d9a913c05239a5bec1c446b4e13da13e1104a4361e7d46debf0f9890bec5227bad39412cacfba0d945578231133ee8776108236c46ad3b9a03ec07fcf1c132
SSDEEP

384:fDyf5QHH7jIR0hmjdPRkkMv8dLLOgvHGk/2z7QYxx8:2xQHbSIOdPRB5pZvHz/2Yh

Score

7^/10

persistence

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
4920	rundll32.exe
4920	rundll32.exe
176	rundll32.exe

Adds Run key to start application 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\Run\	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSServer = "rundll32.exe C:\\Windows\\system32\\khfFWqnk.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

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

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D7A48EFB-4B9D-4531-84A1-68A938B3FF23}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D7A48EFB-4B9D-4531-84A1-68A938B3FF23}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D7A48EFB-4B9D-4531-84A1-68A938B3FF23}\InprocServer32\ = "C:\\Windows\\SysWow64\\khfFWqnk.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D7A48EFB-4B9D-4531-84A1-68A938B3FF23}\InprocServer32\ThreadingModel = "Both"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4920	rundll32.exe
4920	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe
176	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4920	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4920	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4920	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 4944 wrote to memory of 4920	4944	rundll32.exe	80
PID 4944 wrote to memory of 4920	4944	rundll32.exe	80
PID 4944 wrote to memory of 4920	4944	rundll32.exe	80
PID 4920 wrote to memory of 604	4920	rundll32.exe	5
PID 4920 wrote to memory of 176	4920	rundll32.exe	88
PID 4920 wrote to memory of 176	4920	rundll32.exe	88
PID 4920 wrote to memory of 176	4920	rundll32.exe	88

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:604

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\52831d2198afb6e9f624cea7bb9e7bec5b74fc22314380f4282d509e0f1c1d56.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4944
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\52831d2198afb6e9f624cea7bb9e7bec5b74fc22314380f4282d509e0f1c1d56.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: RenamesItself
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4920
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\khfFWqnk.dll,a
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    PID:176

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

Replay Monitor

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Downloads

C:\Windows\SysWOW64\khfFWqnk.dll

Filesize
24KB

MD5
08afb75035b9a9ac996aa7881a2002c4

SHA1
d88cd24c3071e7a980c9b92f08aa99582d3a3e3f

SHA256
52831d2198afb6e9f624cea7bb9e7bec5b74fc22314380f4282d509e0f1c1d56

SHA512
b4d9a913c05239a5bec1c446b4e13da13e1104a4361e7d46debf0f9890bec5227bad39412cacfba0d945578231133ee8776108236c46ad3b9a03ec07fcf1c132

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

Filesize
24KB

MD5
08afb75035b9a9ac996aa7881a2002c4

SHA1
d88cd24c3071e7a980c9b92f08aa99582d3a3e3f

SHA256
52831d2198afb6e9f624cea7bb9e7bec5b74fc22314380f4282d509e0f1c1d56

SHA512
b4d9a913c05239a5bec1c446b4e13da13e1104a4361e7d46debf0f9890bec5227bad39412cacfba0d945578231133ee8776108236c46ad3b9a03ec07fcf1c132

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

Filesize
24KB

MD5
08afb75035b9a9ac996aa7881a2002c4

SHA1
d88cd24c3071e7a980c9b92f08aa99582d3a3e3f

SHA256
52831d2198afb6e9f624cea7bb9e7bec5b74fc22314380f4282d509e0f1c1d56

SHA512
b4d9a913c05239a5bec1c446b4e13da13e1104a4361e7d46debf0f9890bec5227bad39412cacfba0d945578231133ee8776108236c46ad3b9a03ec07fcf1c132

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

Filesize
24KB

MD5
08afb75035b9a9ac996aa7881a2002c4

SHA1
d88cd24c3071e7a980c9b92f08aa99582d3a3e3f

SHA256
52831d2198afb6e9f624cea7bb9e7bec5b74fc22314380f4282d509e0f1c1d56

SHA512
b4d9a913c05239a5bec1c446b4e13da13e1104a4361e7d46debf0f9890bec5227bad39412cacfba0d945578231133ee8776108236c46ad3b9a03ec07fcf1c132

Download Submit
memory/176-142-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/4920-133-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/4920-137-0x0000000002F20000-0x0000000002F32000-memory.dmp

Filesize
72KB

Download
memory/4920-136-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/4920-138-0x0000000002F20000-0x0000000002F32000-memory.dmp

Filesize
72KB

Download