23a3f8c74ce42b380de2d8b1b5218e89231efa4d6c4d1514484307ba1c08976e

Analysis

max time kernel
178s
max time network
196s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
29/10/2022, 10:50

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General

Target

23a3f8c74ce42b380de2d8b1b5218e89231efa4d6c4d1514484307ba1c08976e.exe
Size

23KB
MD5

6cad74fd719de9d14813ac7e201e4833
SHA1

135129c848f2d5d82436354baa330f2125d976f7
SHA256

23a3f8c74ce42b380de2d8b1b5218e89231efa4d6c4d1514484307ba1c08976e
SHA512

63ba2bd240656869821fedbc2a8f945ec6fe984052d14e7b799b35bd9a4587ea8c7cf1c135053d25934c9f46149f67a113128369d71ddd20e50599472194b548
SSDEEP

384:E1+xDiq73HlFQO0Fovaj/jsfl4Q+TomeZqZmFYScLfa42WTi:E1UD9HlCO0Ffbsfd0o/IZmFMLia

Score

10^/10

persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\RECYCLER\\S-1-5-21-0243556031-888888379-781863308-3988\\yuwmix.exe"	23a3f8c74ce42b380de2d8b1b5218e89231efa4d6c4d1514484307ba1c08976e.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yuwmix = "C:\\RECYCLER\\S-1-5-21-0243556031-888888379-781863308-3988\\yuwmix.exe"	23a3f8c74ce42b380de2d8b1b5218e89231efa4d6c4d1514484307ba1c08976e.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run	23a3f8c74ce42b380de2d8b1b5218e89231efa4d6c4d1514484307ba1c08976e.exe

Drops desktop.ini file(s) 1 IoCs

description	ioc	Process
File created	C:\RECYCLER\S-1-5-21-0243556031-888888379-781863308-3988\Desktop.ini	23a3f8c74ce42b380de2d8b1b5218e89231efa4d6c4d1514484307ba1c08976e.exe

Modifies WinLogon 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Taskman = "C:\\RECYCLER\\S-1-5-21-0243556031-888888379-781863308-3988\\yuwmix.exe"	23a3f8c74ce42b380de2d8b1b5218e89231efa4d6c4d1514484307ba1c08976e.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4936	23a3f8c74ce42b380de2d8b1b5218e89231efa4d6c4d1514484307ba1c08976e.exe
4936	23a3f8c74ce42b380de2d8b1b5218e89231efa4d6c4d1514484307ba1c08976e.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4936 wrote to memory of 724	4936	23a3f8c74ce42b380de2d8b1b5218e89231efa4d6c4d1514484307ba1c08976e.exe	36
PID 4936 wrote to memory of 724	4936	23a3f8c74ce42b380de2d8b1b5218e89231efa4d6c4d1514484307ba1c08976e.exe	36
PID 4936 wrote to memory of 724	4936	23a3f8c74ce42b380de2d8b1b5218e89231efa4d6c4d1514484307ba1c08976e.exe	36

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:724
- C:\Users\Admin\AppData\Local\Temp\23a3f8c74ce42b380de2d8b1b5218e89231efa4d6c4d1514484307ba1c08976e.exe
  "C:\Users\Admin\AppData\Local\Temp\23a3f8c74ce42b380de2d8b1b5218e89231efa4d6c4d1514484307ba1c08976e.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Adds Run key to start application
  - Drops desktop.ini file(s)
  - Modifies WinLogon
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4936

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4936-132-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4936-133-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4936-134-0x0000000002210000-0x0000000002225000-memory.dmp

Filesize
84KB

Download