f51928c80b4c0a01aaf4da69733ba5def04860ed32b2e426c874422ece38d1a4

Analysis

max time kernel
142s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
06/11/2022, 05:31

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General

Target

f51928c80b4c0a01aaf4da69733ba5def04860ed32b2e426c874422ece38d1a4.exe
Size

12KB
MD5

2df748c84fcf380044aeaa74be469931
SHA1

4860f700a7a2ef7d5cf92c4b10d377dbf2c9d75d
SHA256

f51928c80b4c0a01aaf4da69733ba5def04860ed32b2e426c874422ece38d1a4
SHA512

8a68d5bd44da9065eb5e5339f30582cbd9ca103e78d1c95211a5b253fdfa37152ce0a442520fd040c54f4062956795be563621bbd87a57ca9042d2539bdd5635
SSDEEP

192:5RhpLLbgSPXbY4gAKdrbIpqcCsUzekAybEIZdEB5yMjgzfDPjwOx95/:5RHvbFP/Kdrbl5r9II/EB51jGLwOxH/

Score

8^/10

persistence upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4328	winupdate.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3368-135-0x0000000000400000-0x000000000040D000-memory.dmp	upx
behavioral2/memory/4328-136-0x0000000000400000-0x000000000040D000-memory.dmp	upx

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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\winupdate.exe = "C:\\Windows\\system32\\winupdate.exe"	f51928c80b4c0a01aaf4da69733ba5def04860ed32b2e426c874422ece38d1a4.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\winupdate.exe = "C:\\Windows\\system32\\winupdate.exe"	winupdate.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\winupdate.exe	f51928c80b4c0a01aaf4da69733ba5def04860ed32b2e426c874422ece38d1a4.exe
File created	C:\Windows\SysWOW64\winupdate.exe	winupdate.exe
File created	C:\Windows\SysWOW64\AVR09.exe	winupdate.exe
File created	C:\Windows\SysWOW64\winupdate.exe	f51928c80b4c0a01aaf4da69733ba5def04860ed32b2e426c874422ece38d1a4.exe

Suspicious use of FindShellTrayWindow 5 IoCs

pid	Process
4328	winupdate.exe
4328	winupdate.exe
4328	winupdate.exe
4328	winupdate.exe
4328	winupdate.exe

Suspicious use of SendNotifyMessage 5 IoCs

pid	Process
4328	winupdate.exe
4328	winupdate.exe
4328	winupdate.exe
4328	winupdate.exe
4328	winupdate.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3368 wrote to memory of 4328	3368	f51928c80b4c0a01aaf4da69733ba5def04860ed32b2e426c874422ece38d1a4.exe	76
PID 3368 wrote to memory of 4328	3368	f51928c80b4c0a01aaf4da69733ba5def04860ed32b2e426c874422ece38d1a4.exe	76
PID 3368 wrote to memory of 4328	3368	f51928c80b4c0a01aaf4da69733ba5def04860ed32b2e426c874422ece38d1a4.exe	76

C:\Users\Admin\AppData\Local\Temp\f51928c80b4c0a01aaf4da69733ba5def04860ed32b2e426c874422ece38d1a4.exe
"C:\Users\Admin\AppData\Local\Temp\f51928c80b4c0a01aaf4da69733ba5def04860ed32b2e426c874422ece38d1a4.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:3368
- C:\Windows\SysWOW64\winupdate.exe
  C:\Windows\system32\winupdate.exe
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in System32 directory
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:4328

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\winupdate.exe

Filesize
12KB

MD5
2df748c84fcf380044aeaa74be469931

SHA1
4860f700a7a2ef7d5cf92c4b10d377dbf2c9d75d

SHA256
f51928c80b4c0a01aaf4da69733ba5def04860ed32b2e426c874422ece38d1a4

SHA512
8a68d5bd44da9065eb5e5339f30582cbd9ca103e78d1c95211a5b253fdfa37152ce0a442520fd040c54f4062956795be563621bbd87a57ca9042d2539bdd5635

Download Submit
C:\Windows\SysWOW64\winupdate.exe

Filesize
12KB

MD5
2df748c84fcf380044aeaa74be469931

SHA1
4860f700a7a2ef7d5cf92c4b10d377dbf2c9d75d

SHA256
f51928c80b4c0a01aaf4da69733ba5def04860ed32b2e426c874422ece38d1a4

SHA512
8a68d5bd44da9065eb5e5339f30582cbd9ca103e78d1c95211a5b253fdfa37152ce0a442520fd040c54f4062956795be563621bbd87a57ca9042d2539bdd5635

Download Submit
memory/3368-135-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/4328-136-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download