8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8

Analysis

max time kernel
153s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
03/10/2022, 14:07

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General

Target

8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe
Size

40KB
MD5

6921b7f5360c84bee3468f163669e680
SHA1

bac8f4f80ff97272e2d061ef66dbdd04a0918701
SHA256

8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8
SHA512

fc3bb5793e71e298553d8eb55610ef0b4760da10edb2b72f9bc242a55b1f2141f890030ddcb2dfac84cf218353ae179281691083bcc6c999212ca8a666ebf167
SSDEEP

768:/6xu9aOQFDcY77R0J0EoGhIMVcT2ZAqh+:/6xxlP6hpVWqh+

Score

8^/10

discovery exploit persistence

Malware Config

Signatures

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
4940	takeown.exe
4828	icacls.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4828	icacls.exe
4940	takeown.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	8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\DbjzZ = "C:\\Windows\\system32\\vonf.exe"	8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\vonf.exe	8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe
File opened for modification	C:\Windows\SysWOW64\vonf.exe	8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4968	8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4968 wrote to memory of 4940	4968	8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe	83
PID 4968 wrote to memory of 4940	4968	8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe	83
PID 4968 wrote to memory of 4940	4968	8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe	83
PID 4968 wrote to memory of 4828	4968	8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe	84
PID 4968 wrote to memory of 4828	4968	8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe	84
PID 4968 wrote to memory of 4828	4968	8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe	84

C:\Users\Admin\AppData\Local\Temp\8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe
"C:\Users\Admin\AppData\Local\Temp\8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4968
- C:\Windows\SysWOW64\takeown.exe
  C:\Windows\system32\takeown.exe /f "C:\Windows\system32\vonf.exe"
  2⤵
  - Possible privilege escalation attempt
  - Modifies file permissions
  PID:4940
- C:\Windows\SysWOW64\icacls.exe
  C:\Windows\system32\icacls.exe "C:\Windows\system32\vonf.exe" /grant Users:F
  2⤵
  - Possible privilege escalation attempt
  - Modifies file permissions
  PID:4828

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\vonf.exe

Filesize
40KB

MD5
6921b7f5360c84bee3468f163669e680

SHA1
bac8f4f80ff97272e2d061ef66dbdd04a0918701

SHA256
8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8

SHA512
fc3bb5793e71e298553d8eb55610ef0b4760da10edb2b72f9bc242a55b1f2141f890030ddcb2dfac84cf218353ae179281691083bcc6c999212ca8a666ebf167

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