f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18

Analysis

max time kernel
132s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
02-10-2022 10:09

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General

Target

f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe
Size

40KB
MD5

6fb7128ff497f4072f4478d684cbcab1
SHA1

dfecc74718f3636d382fabdadf6f85ec000bc715
SHA256

f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18
SHA512

b0df7afa8641b6a9bdcb24fbcc81b01f8b826d2fb72eca5b4e86a96cc50f2d172323a3ffb2c3c82dcda57c9bc96271ed1e93ed1b736e33a756ce76784cf391f9
SSDEEP

768:/GklvetkSuW2UY2F+lUQXarWYw2ssUZZXVy0alOIH:/GiqkSGOF+lUTWYsy0aOIH

Score

8^/10

discovery exploit persistence

Malware Config

Signatures

Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

4936 takeown.exe
4892 icacls.exe
Modifies file permissions 1 TTPs 2 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

takeown.exeicacls.exe

pid process

4936 takeown.exe
4892 icacls.exe

pid	process
4936	takeown.exe
4892	icacls.exe

pid	process
4936	takeown.exe
4892	icacls.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Ujzkg = "C:\\Windows\\system32\\klls.exe"	f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe

Drops file in System32 directory 2 IoCs

Processes:

f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe

description	ioc	process
File created	C:\Windows\SysWOW64\klls.exe	f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe
File opened for modification	C:\Windows\SysWOW64\klls.exe	f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe

pid process

4344 f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe

pid	process
4344	f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe

description	pid	process	target process
PID 4344 wrote to memory of 4936	4344	f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe	takeown.exe
PID 4344 wrote to memory of 4936	4344	f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe	takeown.exe
PID 4344 wrote to memory of 4936	4344	f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe	takeown.exe
PID 4344 wrote to memory of 4892	4344	f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe	icacls.exe
PID 4344 wrote to memory of 4892	4344	f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe	icacls.exe
PID 4344 wrote to memory of 4892	4344	f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe	icacls.exe

C:\Users\Admin\AppData\Local\Temp\f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe
"C:\Users\Admin\AppData\Local\Temp\f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4344
- C:\Windows\SysWOW64\takeown.exe
  C:\Windows\system32\takeown.exe /f "C:\Windows\system32\klls.exe"
  2⤵
  - Possible privilege escalation attempt
  - Modifies file permissions
  PID:4936
- C:\Windows\SysWOW64\icacls.exe
  C:\Windows\system32\icacls.exe "C:\Windows\system32\klls.exe" /grant Users:F
  2⤵
  - Possible privilege escalation attempt
  - Modifies file permissions
  PID:4892

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\klls.exe

Filesize
40KB

MD5
6fb7128ff497f4072f4478d684cbcab1

SHA1
dfecc74718f3636d382fabdadf6f85ec000bc715

SHA256
f04bda4839e0e23480ff96288086cfba799b958d5478161299fdfaebab902f18

SHA512
b0df7afa8641b6a9bdcb24fbcc81b01f8b826d2fb72eca5b4e86a96cc50f2d172323a3ffb2c3c82dcda57c9bc96271ed1e93ed1b736e33a756ce76784cf391f9

Download Submit
memory/4892-135-0x0000000000000000-mapping.dmp

Download
memory/4936-134-0x0000000000000000-mapping.dmp

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