ef917cc554a19cc88efeb7a6b07c213e167944cec3b428bfafae86580e8e2ab0

Analysis

max time kernel
147s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
31-12-2023 13:18

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General

Target

37acec7e4afb1080cba05992602a67e1.exe
Size

61KB
MD5

37acec7e4afb1080cba05992602a67e1
SHA1

66430c48dd3648fcc590394badac08cce296befe
SHA256

ef917cc554a19cc88efeb7a6b07c213e167944cec3b428bfafae86580e8e2ab0
SHA512

c6c38ee03435caedbd38df040844ca69d101803551bd70c4e9fc8aec838cece7f3b904990da9bb2c135a7843c96a66d85c6a98533e46833f541febc2e112129d
SSDEEP

1536:YBOAl86CA5eW5ZTgv/bSTbfctnP7I99lP/nsq:aO6kUhgW/fcJ7IDl3s

Score

10^/10

persistence upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "C:\\Users\\Admin\\AppData\\Local\\Temp\\37acec7e4afb1080cba05992602a67e1.exe"	37acec7e4afb1080cba05992602a67e1.exe

UPX packed file 7 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4428-0-0x0000000000400000-0x0000000000422200-memory.dmp	upx
behavioral2/memory/508-5-0x0000000000400000-0x0000000000413000-memory.dmp	upx
behavioral2/memory/508-8-0x0000000000400000-0x0000000000413000-memory.dmp	upx
behavioral2/memory/508-7-0x0000000000400000-0x0000000000413000-memory.dmp	upx
behavioral2/memory/4428-9-0x0000000000400000-0x0000000000422200-memory.dmp	upx
behavioral2/memory/508-3-0x0000000000400000-0x0000000000413000-memory.dmp	upx
behavioral2/memory/508-10-0x0000000000400000-0x0000000000413000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Shell = "C:\\Users\\Admin\\AppData\\Local\\Temp\\37acec7e4afb1080cba05992602a67e1.exe"	37acec7e4afb1080cba05992602a67e1.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4428 set thread context of 508	4428	37acec7e4afb1080cba05992602a67e1.exe	24

Kills process with taskkill 1 IoCs

evasion

pid	Process
544	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	544	taskkill.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4428	37acec7e4afb1080cba05992602a67e1.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4428 wrote to memory of 508	4428	37acec7e4afb1080cba05992602a67e1.exe	24
PID 4428 wrote to memory of 508	4428	37acec7e4afb1080cba05992602a67e1.exe	24
PID 4428 wrote to memory of 508	4428	37acec7e4afb1080cba05992602a67e1.exe	24
PID 4428 wrote to memory of 508	4428	37acec7e4afb1080cba05992602a67e1.exe	24
PID 4428 wrote to memory of 508	4428	37acec7e4afb1080cba05992602a67e1.exe	24
PID 4428 wrote to memory of 508	4428	37acec7e4afb1080cba05992602a67e1.exe	24
PID 4428 wrote to memory of 508	4428	37acec7e4afb1080cba05992602a67e1.exe	24
PID 4428 wrote to memory of 508	4428	37acec7e4afb1080cba05992602a67e1.exe	24
PID 508 wrote to memory of 544	508	37acec7e4afb1080cba05992602a67e1.exe	19
PID 508 wrote to memory of 544	508	37acec7e4afb1080cba05992602a67e1.exe	19
PID 508 wrote to memory of 544	508	37acec7e4afb1080cba05992602a67e1.exe	19

C:\Users\Admin\AppData\Local\Temp\37acec7e4afb1080cba05992602a67e1.exe
"C:\Users\Admin\AppData\Local\Temp\37acec7e4afb1080cba05992602a67e1.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4428
- C:\Users\Admin\AppData\Local\Temp\37acec7e4afb1080cba05992602a67e1.exe
  "C:\Users\Admin\AppData\Local\Temp\37acec7e4afb1080cba05992602a67e1.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:508

C:\Windows\SysWOW64\taskkill.exe
taskkill /F /IM explorer.exe
1⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:544

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/508-5-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/508-8-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/508-7-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/508-3-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/508-10-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4428-0-0x0000000000400000-0x0000000000422200-memory.dmp

Filesize
136KB

Download
memory/4428-9-0x0000000000400000-0x0000000000422200-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads