22503a27c8bd1299e67f484b0c750276323d5a97b9dd45e1da7a935fe377ec1e

Resubmissions

02-08-2024 16:33

240802-t2wr5s1eqj 10

Analysis

max time kernel
150s
max time network
147s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
02-08-2024 16:33

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General

Target

Server.exe
Size

96KB
MD5

bfd0dcf57209068cc25907ff8ddc17e1
SHA1

8b913990c8691231e1d8e249d6d7f9a59b85dc1e
SHA256

8a16390f705599cacaba51ccf440f7f0a8320e614f71710a594312756788b28d
SHA512

8a2838fd69419a249a37b7569a7c0333e8c36a71df0dc7b8ea414f87392b42e885bcd3fc41b6bda181c6f69d98a5a5367d06b8ff6c7d3e577ea4d2581c2bfe09
SSDEEP

1536:GRtxXnig5/VUJyWryEXe8T1g6hypxc/lkJ5jj1fV8cGDmtB:GhN5/VmbTC6hyQ/OJRj1V8cGCtB

Score

7^/10

defense_evasion discovery

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

svchost.exe

pid process

1700 svchost.exe
Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

pid	process
1700	svchost.exe

Drops file in Program Files directory 3 IoCs

Processes:

Server.exe

description	ioc	process
File opened for modification	C:\Program Files\meouau	Server.exe
File created	C:\Program Files\meouau\svchost.exe	Server.exe
File opened for modification	C:\Program Files\meouau\svchost.exe	Server.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

cmd.exeServer.exesvchost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

svchost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Server.exe

description pid process

Token: SeIncBasePriorityPrivilege 1284 Server.exe

description	pid	process
Token: SeIncBasePriorityPrivilege	1284	Server.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

Server.exe

description	pid	process	target process
PID 1284 wrote to memory of 1996	1284	Server.exe	cmd.exe
PID 1284 wrote to memory of 1996	1284	Server.exe	cmd.exe
PID 1284 wrote to memory of 1996	1284	Server.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\Server.exe
"C:\Users\Admin\AppData\Local\Temp\Server.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1284

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\Server.exe > nul
2⤵
- System Location Discovery: System Language Discovery
PID:1996

C:\Program Files\meouau\svchost.exe
"C:\Program Files\meouau\svchost.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Checks processor information in registry
PID:1700

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Indicator Removal

T1070

File Deletion

T1070.004

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files\meouau\svchost.exe

Filesize
96KB

MD5
bfd0dcf57209068cc25907ff8ddc17e1

SHA1
8b913990c8691231e1d8e249d6d7f9a59b85dc1e

SHA256
8a16390f705599cacaba51ccf440f7f0a8320e614f71710a594312756788b28d

SHA512
8a2838fd69419a249a37b7569a7c0333e8c36a71df0dc7b8ea414f87392b42e885bcd3fc41b6bda181c6f69d98a5a5367d06b8ff6c7d3e577ea4d2581c2bfe09

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