b81f4f21017f38ee51e25e23a4357dae649554e43bd55f9a4840262af7f51144

Analysis

max time kernel
143s
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
27-01-2024 05:27

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

79642aa8ae971b5e655cc5e4b989c133.exe
Size

22KB
MD5

79642aa8ae971b5e655cc5e4b989c133
SHA1

ee12fc5dfdf42658d713c11d095627e4f1b4670e
SHA256

b81f4f21017f38ee51e25e23a4357dae649554e43bd55f9a4840262af7f51144
SHA512

cc32ed46904073c75c3469e6ed7f9e9a80e1bc88a52a5fb1ce2093f807bfa6c71432e842c4c9fe4025312618177083996690ce6cfbcea756236ea4bda597d3c4
SSDEEP

384:cGIm/vdaWQ5UJ3vU8AZcWh36/2PA3fYQoy07uSFj2X/P57x:cGjQ5m3cz30OAvYQonuSJq3t

Score

8^/10

persistence

Malware Config

Signatures

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\msupdate\ImagePath = "c:\\windows\\system32\\mssrv32.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

3320 svchost.exe

pid	process
3320	svchost.exe

Drops file in System32 directory 2 IoCs

Processes:

79642aa8ae971b5e655cc5e4b989c133.exe

description	ioc	process
File created	\??\c:\windows\SysWOW64\mssrv32.exe	79642aa8ae971b5e655cc5e4b989c133.exe
File opened for modification	\??\c:\windows\SysWOW64\mssrv32.exe	79642aa8ae971b5e655cc5e4b989c133.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

79642aa8ae971b5e655cc5e4b989c133.exe

description pid process target process

PID 452 set thread context of 3320 452 79642aa8ae971b5e655cc5e4b989c133.exe svchost.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3308 3320 WerFault.exe svchost.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

79642aa8ae971b5e655cc5e4b989c133.exe

description pid process

Token: SeDebugPrivilege 4956 79642aa8ae971b5e655cc5e4b989c133.exe

description	pid	process	target process
PID 452 set thread context of 3320	452	79642aa8ae971b5e655cc5e4b989c133.exe	svchost.exe

pid	pid_target	process	target process
3308	3320	WerFault.exe	svchost.exe

description	pid	process
Token: SeDebugPrivilege	4956	79642aa8ae971b5e655cc5e4b989c133.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

79642aa8ae971b5e655cc5e4b989c133.exe79642aa8ae971b5e655cc5e4b989c133.exe

description	pid	process	target process
PID 4956 wrote to memory of 452	4956	79642aa8ae971b5e655cc5e4b989c133.exe	79642aa8ae971b5e655cc5e4b989c133.exe
PID 4956 wrote to memory of 452	4956	79642aa8ae971b5e655cc5e4b989c133.exe	79642aa8ae971b5e655cc5e4b989c133.exe
PID 4956 wrote to memory of 452	4956	79642aa8ae971b5e655cc5e4b989c133.exe	79642aa8ae971b5e655cc5e4b989c133.exe
PID 452 wrote to memory of 3320	452	79642aa8ae971b5e655cc5e4b989c133.exe	svchost.exe
PID 452 wrote to memory of 3320	452	79642aa8ae971b5e655cc5e4b989c133.exe	svchost.exe
PID 452 wrote to memory of 3320	452	79642aa8ae971b5e655cc5e4b989c133.exe	svchost.exe
PID 452 wrote to memory of 3320	452	79642aa8ae971b5e655cc5e4b989c133.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\79642aa8ae971b5e655cc5e4b989c133.exe
"C:\Users\Admin\AppData\Local\Temp\79642aa8ae971b5e655cc5e4b989c133.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4956

\??\c:\users\admin\appdata\local\temp\79642aa8ae971b5e655cc5e4b989c133.exe
c:\users\admin\appdata\local\temp\79642aa8ae971b5e655cc5e4b989c133.exe
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:452

C:\Windows\SysWOW64\svchost.exe
C:\Windows\system32\svchost.exe
3⤵
- Sets service image path in registry
- Deletes itself
PID:3320

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3320 -s 340
4⤵
- Program crash
PID:3308

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3320 -ip 3320
1⤵
PID:3496

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

\??\c:\windows\SysWOW64\mssrv32.exe
Filesize
22KB

MD5
79642aa8ae971b5e655cc5e4b989c133

SHA1
ee12fc5dfdf42658d713c11d095627e4f1b4670e

SHA256
b81f4f21017f38ee51e25e23a4357dae649554e43bd55f9a4840262af7f51144

SHA512
cc32ed46904073c75c3469e6ed7f9e9a80e1bc88a52a5fb1ce2093f807bfa6c71432e842c4c9fe4025312618177083996690ce6cfbcea756236ea4bda597d3c4

Download Submit
memory/452-3-0x0000000015110000-0x000000001511A000-memory.dmp

Filesize
40KB

Download
memory/3320-2-0x0000000015110000-0x000000001511A000-memory.dmp

Filesize
40KB

Download
memory/3320-6-0x0000000015110000-0x000000001511A000-memory.dmp

Filesize
40KB

Download
memory/4956-0-0x0000000015110000-0x000000001511A000-memory.dmp

Filesize
40KB

Download
memory/4956-4-0x0000000015110000-0x000000001511A000-memory.dmp

Filesize
40KB

Download