c61a1879146117877169d640dd661cec26c0800023aaeb5111bb0bbb271c25df

Analysis

max time kernel
154s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
26/01/2024, 07:31

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General

Target

76c16a4ef7e859f9e86968bdc5f57e30.exe
Size

488KB
MD5

76c16a4ef7e859f9e86968bdc5f57e30
SHA1

026cbbad64424adb60e7d044cbe2feb7f4d398fd
SHA256

c61a1879146117877169d640dd661cec26c0800023aaeb5111bb0bbb271c25df
SHA512

d773e5bd3d25a35aaae8f08712a05dc35e5d58d9ed63c72639f99bfb05d2241fd8c5ef1af0047a245e6624b12ad24410712d38397dfc395bb7617677931d1220
SSDEEP

12288:ESdTbQRtasaRlJo+URiYgV4TsOU/o3HfAcITN:ESdHQRosMlJlUR5I4T5U/aAcIJ

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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\userinit = "C:\\Windows\\system32\\twext.exe,"	76c16a4ef7e859f9e86968bdc5f57e30.exe

UPX packed file 1 IoCs

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

upx

resource	yara_rule
behavioral2/memory/784-0-0x0000000000400000-0x0000000000435000-memory.dmp	upx

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\twext.exe	76c16a4ef7e859f9e86968bdc5f57e30.exe
File opened for modification	C:\Windows\SysWOW64\twext.exe	76c16a4ef7e859f9e86968bdc5f57e30.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
5008	784	WerFault.exe	84
2392	784	WerFault.exe	84

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
784	76c16a4ef7e859f9e86968bdc5f57e30.exe
784	76c16a4ef7e859f9e86968bdc5f57e30.exe
784	76c16a4ef7e859f9e86968bdc5f57e30.exe
784	76c16a4ef7e859f9e86968bdc5f57e30.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	784	76c16a4ef7e859f9e86968bdc5f57e30.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78
PID 784 wrote to memory of 636	784	76c16a4ef7e859f9e86968bdc5f57e30.exe	78

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:636

C:\Users\Admin\AppData\Local\Temp\76c16a4ef7e859f9e86968bdc5f57e30.exe
"C:\Users\Admin\AppData\Local\Temp\76c16a4ef7e859f9e86968bdc5f57e30.exe"
1⤵
- Modifies WinLogon for persistence
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:784
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 784 -s 1016
  2⤵
  - Program crash
  PID:5008
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 784 -s 1012
  2⤵
  - Program crash
  PID:2392

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 784 -ip 784
1⤵
PID:2268

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 784 -ip 784
1⤵
PID:984

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/636-12-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/636-17-0x000000001D040000-0x000000001D066000-memory.dmp

Filesize
152KB

Download
memory/636-22-0x000000001D070000-0x000000001D096000-memory.dmp

Filesize
152KB

Download
memory/636-27-0x000000001D0A0000-0x000000001D0C6000-memory.dmp

Filesize
152KB

Download
memory/636-32-0x000000001D0D0000-0x000000001D0F6000-memory.dmp

Filesize
152KB

Download
memory/636-37-0x000000001D100000-0x000000001D126000-memory.dmp

Filesize
152KB

Download
memory/636-42-0x000000001D130000-0x000000001D156000-memory.dmp

Filesize
152KB

Download
memory/636-47-0x000000001D160000-0x000000001D186000-memory.dmp

Filesize
152KB

Download
memory/636-52-0x000000001D190000-0x000000001D1B6000-memory.dmp

Filesize
152KB

Download
memory/636-57-0x000000001D1C0000-0x000000001D1E6000-memory.dmp

Filesize
152KB

Download
memory/636-62-0x000000001D1F0000-0x000000001D216000-memory.dmp

Filesize
152KB

Download
memory/636-67-0x000000001D220000-0x000000001D246000-memory.dmp

Filesize
152KB

Download
memory/636-72-0x000000001D250000-0x000000001D276000-memory.dmp

Filesize
152KB

Download
memory/636-77-0x000000001D280000-0x000000001D2A6000-memory.dmp

Filesize
152KB

Download
memory/636-82-0x000000001D2B0000-0x000000001D2D6000-memory.dmp

Filesize
152KB

Download
memory/636-87-0x000000001D2E0000-0x000000001D306000-memory.dmp

Filesize
152KB

Download
memory/636-92-0x000000001D310000-0x000000001D336000-memory.dmp

Filesize
152KB

Download
memory/636-97-0x000000001D340000-0x000000001D366000-memory.dmp

Filesize
152KB

Download
memory/636-102-0x000000001D370000-0x000000001D396000-memory.dmp

Filesize
152KB

Download
memory/636-107-0x000000001D3A0000-0x000000001D3C6000-memory.dmp

Filesize
152KB

Download
memory/636-112-0x000000001D3D0000-0x000000001D3F6000-memory.dmp

Filesize
152KB

Download
memory/636-117-0x000000001D400000-0x000000001D426000-memory.dmp

Filesize
152KB

Download
memory/636-122-0x000000001D430000-0x000000001D456000-memory.dmp

Filesize
152KB

Download
memory/636-127-0x000000001D460000-0x000000001D486000-memory.dmp

Filesize
152KB

Download
memory/636-132-0x000000001D490000-0x000000001D4B6000-memory.dmp

Filesize
152KB

Download
memory/636-137-0x000000001D4C0000-0x000000001D4E6000-memory.dmp

Filesize
152KB

Download
memory/636-142-0x000000001D4F0000-0x000000001D516000-memory.dmp

Filesize
152KB

Download
memory/636-147-0x000000001D520000-0x000000001D546000-memory.dmp

Filesize
152KB

Download
memory/636-152-0x000000001D550000-0x000000001D576000-memory.dmp

Filesize
152KB

Download
memory/636-157-0x000000001D580000-0x000000001D5A6000-memory.dmp

Filesize
152KB

Download
memory/636-162-0x000000001D5B0000-0x000000001D5D6000-memory.dmp

Filesize
152KB

Download
memory/636-167-0x000000001D5E0000-0x000000001D606000-memory.dmp

Filesize
152KB

Download
memory/636-172-0x000000001D610000-0x000000001D636000-memory.dmp

Filesize
152KB

Download
memory/636-177-0x000000001D640000-0x000000001D666000-memory.dmp

Filesize
152KB

Download
memory/636-182-0x000000001D670000-0x000000001D696000-memory.dmp

Filesize
152KB

Download
memory/636-187-0x000000001D6A0000-0x000000001D6C6000-memory.dmp

Filesize
152KB

Download
memory/636-192-0x000000001D6D0000-0x000000001D6F6000-memory.dmp

Filesize
152KB

Download
memory/636-197-0x000000001D700000-0x000000001D726000-memory.dmp

Filesize
152KB

Download
memory/636-202-0x000000001D730000-0x000000001D756000-memory.dmp

Filesize
152KB

Download
memory/636-207-0x000000001D760000-0x000000001D786000-memory.dmp

Filesize
152KB

Download
memory/636-212-0x000000001D790000-0x000000001D7B6000-memory.dmp

Filesize
152KB

Download
memory/636-217-0x000000001D7C0000-0x000000001D7E6000-memory.dmp

Filesize
152KB

Download
memory/636-222-0x000000001D7F0000-0x000000001D816000-memory.dmp

Filesize
152KB

Download
memory/636-227-0x000000001D820000-0x000000001D846000-memory.dmp

Filesize
152KB

Download
memory/636-232-0x000000001D850000-0x000000001D876000-memory.dmp

Filesize
152KB

Download
memory/636-237-0x000000001D880000-0x000000001D8A6000-memory.dmp

Filesize
152KB

Download
memory/636-242-0x000000001D8B0000-0x000000001D8D6000-memory.dmp

Filesize
152KB

Download
memory/636-247-0x000000001D8E0000-0x000000001D906000-memory.dmp

Filesize
152KB

Download
memory/636-252-0x000000001D910000-0x000000001D936000-memory.dmp

Filesize
152KB

Download
memory/636-257-0x000000001D940000-0x000000001D966000-memory.dmp

Filesize
152KB

Download
memory/636-262-0x000000001D970000-0x000000001D996000-memory.dmp

Filesize
152KB

Download
memory/636-267-0x000000001D9A0000-0x000000001D9C6000-memory.dmp

Filesize
152KB

Download
memory/636-272-0x000000001D9D0000-0x000000001D9F6000-memory.dmp

Filesize
152KB

Download
memory/636-277-0x000000001DA00000-0x000000001DA26000-memory.dmp

Filesize
152KB

Download
memory/636-282-0x000000001DA30000-0x000000001DA56000-memory.dmp

Filesize
152KB

Download
memory/636-287-0x000000001DA60000-0x000000001DA86000-memory.dmp

Filesize
152KB

Download
memory/636-292-0x000000001DA90000-0x000000001DAB6000-memory.dmp

Filesize
152KB

Download
memory/636-297-0x000000001DAC0000-0x000000001DAE6000-memory.dmp

Filesize
152KB

Download
memory/636-302-0x000000001DAF0000-0x000000001DB16000-memory.dmp

Filesize
152KB

Download
memory/636-307-0x000000001DB20000-0x000000001DB46000-memory.dmp

Filesize
152KB

Download
memory/636-312-0x000000001DB50000-0x000000001DB76000-memory.dmp

Filesize
152KB

Download
memory/636-317-0x000000001DB80000-0x000000001DBA6000-memory.dmp

Filesize
152KB

Download
memory/784-0-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/784-1-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/784-3-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/784-2670-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download