f1d4cf0fec6a19910599f985043e6699ec763c58330d66e86bdce4b12fc82407

Resubmissions

25-11-2022 15:38

221125-s3jcrsbh9x 10

25-11-2022 15:33

221125-szhl3abg2v 10

Analysis

max time kernel
248s
max time network
234s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
25-11-2022 15:33

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General

Target

server.exe
Size

342KB
MD5

dd7a7bdffc40007a2e9a77de930b2ab2
SHA1

6088343b8765d896bb8ec465e25b1cecca5f8c67
SHA256

f1d4cf0fec6a19910599f985043e6699ec763c58330d66e86bdce4b12fc82407
SHA512

f130953f19e91c8871ce93fb85a0bd062e7fbbdc3742dc5f9be9e373dd66c54ace542189f21ba9b3c93a55a77e83e328b7d95279457fbf95ebd8dfe9993fbcae
SSDEEP

6144:4Rqmpp+amNOGokzLyM9tsLAitQo6tzOKkzIt8gKyfjxfR9D2j4yYWYbCyx:8qmpplpGoGL3etQoMiXM8gxf/Sj4yix

Score

10^/10

aspackv2 persistence upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

server.exeservices.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe C:\\Windows\\system32\\fservice.exe"	server.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe C:\\Windows\\system32\\fservice.exe"	services.exe

ASPack v2.12-2.42 1 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

Processes:

resource	yara_rule
C:\Windows\SysWOW64\winkey.dll	aspack_v212_v242

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

server.exeservices.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	server.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\DirectX For Microsoft® Windows = "C:\\Windows\\system32\\fservice.exe"	server.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	services.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\DirectX For Microsoft® Windows = "C:\\Windows\\system32\\fservice.exe"	services.exe

Executes dropped EXE 2 IoCs

Processes:

fservice.exeservices.exe

pid process

2652 fservice.exe
3692 services.exe

pid	process
2652	fservice.exe
3692	services.exe

Modifies Installed Components in the registry 2 TTPs 5 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

server.exeservices.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\StubPath = "C:\\Windows\\system\\sservice.exe"	server.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\	services.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\StubPath = "C:\\Windows\\system\\sservice.exe"	services.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}	server.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\	server.exe

UPX packed file 10 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/5000-132-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
C:\Windows\SysWOW64\fservice.exe	upx
C:\Windows\SysWOW64\fservice.exe	upx
C:\Windows\system\sservice.exe	upx
C:\Windows\services.exe	upx
C:\Windows\services.exe	upx
behavioral1/memory/2652-146-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral1/memory/3692-147-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral1/memory/5000-150-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral1/memory/3692-158-0x0000000000400000-0x00000000005FC000-memory.dmp	upx

Loads dropped DLL 5 IoCs

Processes:

services.exefservice.exeserver.exe

pid process

3692 services.exe
3692 services.exe
3692 services.exe
2652 fservice.exe
5000 server.exe
Unexpected DNS network traffic destination 4 IoCs
Network traffic to other servers than the configured DNS servers was detected on the DNS port.

Processes:

description ioc

Destination IP 95.0.242.21
Destination IP 155.223.2.2
Destination IP 151.164.23.201
Destination IP 193.255.49.56

pid	process
3692	services.exe
3692	services.exe
3692	services.exe
2652	fservice.exe
5000	server.exe

description	ioc
Destination IP	95.0.242.21
Destination IP	155.223.2.2
Destination IP	151.164.23.201
Destination IP	193.255.49.56

Modifies WinLogon 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

server.exeservices.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\	server.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\	services.exe

Drops file in System32 directory 7 IoCs

Processes:

fservice.exeservices.exeserver.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\fservice.exe	fservice.exe
File created	C:\Windows\SysWOW64\winkey.dll	services.exe
File created	C:\Windows\SysWOW64\reginv.dll	services.exe
File created	C:\Windows\SysWOW64\fservice.exe	services.exe
File created	C:\Windows\SysWOW64\fservice.exe	server.exe
File opened for modification	C:\Windows\SysWOW64\fservice.exe	server.exe
File created	C:\Windows\SysWOW64\fservice.exe	fservice.exe

Drops file in Windows directory 7 IoCs

Processes:

server.exefservice.exeservices.exe

description	ioc	process
File opened for modification	C:\Windows\system\sservice.exe	server.exe
File created	C:\Windows\services.exe	fservice.exe
File opened for modification	C:\Windows\services.exe	fservice.exe
File created	C:\Windows\system\sservice.exe	fservice.exe
File opened for modification	C:\Windows\system\sservice.exe	fservice.exe
File created	C:\Windows\system\sservice.exe	services.exe
File created	C:\Windows\system\sservice.exe	server.exe

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

POWERPNT.EXE

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	POWERPNT.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	POWERPNT.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	POWERPNT.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

POWERPNT.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	POWERPNT.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	POWERPNT.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	POWERPNT.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

POWERPNT.EXE

pid process

1092 POWERPNT.EXE
Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

services.exePOWERPNT.EXE

pid process

3692 services.exe
3692 services.exe
1092 POWERPNT.EXE
1092 POWERPNT.EXE

pid	process
1092	POWERPNT.EXE

pid	process
3692	services.exe
3692	services.exe
1092	POWERPNT.EXE
1092	POWERPNT.EXE

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

server.exefservice.exe

description	pid	process	target process
PID 5000 wrote to memory of 2652	5000	server.exe	fservice.exe
PID 5000 wrote to memory of 2652	5000	server.exe	fservice.exe
PID 5000 wrote to memory of 2652	5000	server.exe	fservice.exe
PID 2652 wrote to memory of 3692	2652	fservice.exe	services.exe
PID 2652 wrote to memory of 3692	2652	fservice.exe	services.exe
PID 2652 wrote to memory of 3692	2652	fservice.exe	services.exe

C:\Users\Admin\AppData\Local\Temp\server.exe
"C:\Users\Admin\AppData\Local\Temp\server.exe"
1⤵
- Modifies WinLogon for persistence
- Adds policy Run key to start application
- Modifies Installed Components in the registry
- Loads dropped DLL
- Modifies WinLogon
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:5000

C:\Windows\SysWOW64\fservice.exe
C:\Windows\system32\fservice.exe
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2652

C:\Windows\services.exe
C:\Windows\services.exe -XP
3⤵
- Modifies WinLogon for persistence
- Adds policy Run key to start application
- Executes dropped EXE
- Modifies Installed Components in the registry
- Loads dropped DLL
- Modifies WinLogon
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious use of SetWindowsHookEx
PID:3692

C:\Program Files\Microsoft Office\Root\Office16\POWERPNT.EXE
"C:\Program Files\Microsoft Office\Root\Office16\POWERPNT.EXE" /s "C:\Users\Admin\Desktop\ExitOptimize.ppsx" /ou ""
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1092

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\fservice.exe
Filesize
342KB

MD5
dd7a7bdffc40007a2e9a77de930b2ab2

SHA1
6088343b8765d896bb8ec465e25b1cecca5f8c67

SHA256
f1d4cf0fec6a19910599f985043e6699ec763c58330d66e86bdce4b12fc82407

SHA512
f130953f19e91c8871ce93fb85a0bd062e7fbbdc3742dc5f9be9e373dd66c54ace542189f21ba9b3c93a55a77e83e328b7d95279457fbf95ebd8dfe9993fbcae

Download Submit
C:\Windows\SysWOW64\fservice.exe
Filesize
342KB

MD5
dd7a7bdffc40007a2e9a77de930b2ab2

SHA1
6088343b8765d896bb8ec465e25b1cecca5f8c67

SHA256
f1d4cf0fec6a19910599f985043e6699ec763c58330d66e86bdce4b12fc82407

SHA512
f130953f19e91c8871ce93fb85a0bd062e7fbbdc3742dc5f9be9e373dd66c54ace542189f21ba9b3c93a55a77e83e328b7d95279457fbf95ebd8dfe9993fbcae

Download Submit
C:\Windows\SysWOW64\reginv.dll
Filesize
36KB

MD5
562e0d01d6571fa2251a1e9f54c6cc69

SHA1
83677ad3bc630aa6327253c7b3deffbd4a8ce905

SHA256
c5b1d800c86d550c0b68c57c0d9911c1dd21df9e5e37e9e7bc032b5e66fdebe6

SHA512
166e132432eca24061f7e7d0c58c0b286e971ae2bc50f7c890b7707dd5dede19fcd83a5f79b6fd3f93dd691e07ad9bc1bd05fe82ccaade1610282188571585ea

Download Submit
C:\Windows\SysWOW64\reginv.dll
Filesize
36KB

MD5
562e0d01d6571fa2251a1e9f54c6cc69

SHA1
83677ad3bc630aa6327253c7b3deffbd4a8ce905

SHA256
c5b1d800c86d550c0b68c57c0d9911c1dd21df9e5e37e9e7bc032b5e66fdebe6

SHA512
166e132432eca24061f7e7d0c58c0b286e971ae2bc50f7c890b7707dd5dede19fcd83a5f79b6fd3f93dd691e07ad9bc1bd05fe82ccaade1610282188571585ea

Download Submit
C:\Windows\SysWOW64\reginv.dll
Filesize
36KB

MD5
562e0d01d6571fa2251a1e9f54c6cc69

SHA1
83677ad3bc630aa6327253c7b3deffbd4a8ce905

SHA256
c5b1d800c86d550c0b68c57c0d9911c1dd21df9e5e37e9e7bc032b5e66fdebe6

SHA512
166e132432eca24061f7e7d0c58c0b286e971ae2bc50f7c890b7707dd5dede19fcd83a5f79b6fd3f93dd691e07ad9bc1bd05fe82ccaade1610282188571585ea

Download Submit
C:\Windows\SysWOW64\reginv.dll
Filesize
36KB

MD5
562e0d01d6571fa2251a1e9f54c6cc69

SHA1
83677ad3bc630aa6327253c7b3deffbd4a8ce905

SHA256
c5b1d800c86d550c0b68c57c0d9911c1dd21df9e5e37e9e7bc032b5e66fdebe6

SHA512
166e132432eca24061f7e7d0c58c0b286e971ae2bc50f7c890b7707dd5dede19fcd83a5f79b6fd3f93dd691e07ad9bc1bd05fe82ccaade1610282188571585ea

Download Submit
C:\Windows\SysWOW64\reginv.dll
Filesize
36KB

MD5
562e0d01d6571fa2251a1e9f54c6cc69

SHA1
83677ad3bc630aa6327253c7b3deffbd4a8ce905

SHA256
c5b1d800c86d550c0b68c57c0d9911c1dd21df9e5e37e9e7bc032b5e66fdebe6

SHA512
166e132432eca24061f7e7d0c58c0b286e971ae2bc50f7c890b7707dd5dede19fcd83a5f79b6fd3f93dd691e07ad9bc1bd05fe82ccaade1610282188571585ea

Download Submit
C:\Windows\SysWOW64\winkey.dll
Filesize
13KB

MD5
b4c72da9fd1a0dcb0698b7da97daa0cd

SHA1
b25a79e8ea4c723c58caab83aed6ea48de7ed759

SHA256
45d266269634ba2de70f179a26d7224111e677e66b38dff2802851b71ce4458f

SHA512
f5f184416c5381d275bc093c9275e9fdb35c58e2c401d188aef097950013de6e43269da5d4dd5e7baea34735bd7de664d15fe487b2292fd66926c9845b0cd066

Download Submit
C:\Windows\services.exe
Filesize
342KB

MD5
dd7a7bdffc40007a2e9a77de930b2ab2

SHA1
6088343b8765d896bb8ec465e25b1cecca5f8c67

SHA256
f1d4cf0fec6a19910599f985043e6699ec763c58330d66e86bdce4b12fc82407

SHA512
f130953f19e91c8871ce93fb85a0bd062e7fbbdc3742dc5f9be9e373dd66c54ace542189f21ba9b3c93a55a77e83e328b7d95279457fbf95ebd8dfe9993fbcae

Download Submit
C:\Windows\services.exe
Filesize
342KB

MD5
dd7a7bdffc40007a2e9a77de930b2ab2

SHA1
6088343b8765d896bb8ec465e25b1cecca5f8c67

SHA256
f1d4cf0fec6a19910599f985043e6699ec763c58330d66e86bdce4b12fc82407

SHA512
f130953f19e91c8871ce93fb85a0bd062e7fbbdc3742dc5f9be9e373dd66c54ace542189f21ba9b3c93a55a77e83e328b7d95279457fbf95ebd8dfe9993fbcae

Download Submit
C:\Windows\system\sservice.exe
Filesize
342KB

MD5
dd7a7bdffc40007a2e9a77de930b2ab2

SHA1
6088343b8765d896bb8ec465e25b1cecca5f8c67

SHA256
f1d4cf0fec6a19910599f985043e6699ec763c58330d66e86bdce4b12fc82407

SHA512
f130953f19e91c8871ce93fb85a0bd062e7fbbdc3742dc5f9be9e373dd66c54ace542189f21ba9b3c93a55a77e83e328b7d95279457fbf95ebd8dfe9993fbcae

Download Submit
memory/1092-152-0x00007FF8D11D0000-0x00007FF8D11E0000-memory.dmp

Filesize
64KB

Download
memory/1092-156-0x00007FF8CF0D0000-0x00007FF8CF0E0000-memory.dmp

Filesize
64KB

Download
memory/1092-163-0x00007FF8D11D0000-0x00007FF8D11E0000-memory.dmp

Filesize
64KB

Download
memory/1092-162-0x00007FF8D11D0000-0x00007FF8D11E0000-memory.dmp

Filesize
64KB

Download
memory/1092-161-0x00007FF8D11D0000-0x00007FF8D11E0000-memory.dmp

Filesize
64KB

Download
memory/1092-160-0x00007FF8D11D0000-0x00007FF8D11E0000-memory.dmp

Filesize
64KB

Download
memory/1092-157-0x00007FF8CF0D0000-0x00007FF8CF0E0000-memory.dmp

Filesize
64KB

Download
memory/1092-155-0x00007FF8D11D0000-0x00007FF8D11E0000-memory.dmp

Filesize
64KB

Download
memory/1092-151-0x00007FF8D11D0000-0x00007FF8D11E0000-memory.dmp

Filesize
64KB

Download
memory/1092-153-0x00007FF8D11D0000-0x00007FF8D11E0000-memory.dmp

Filesize
64KB

Download
memory/1092-154-0x00007FF8D11D0000-0x00007FF8D11E0000-memory.dmp

Filesize
64KB

Download
memory/2652-133-0x0000000000000000-mapping.dmp

Download
memory/2652-146-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/3692-143-0x0000000003921000-0x0000000003925000-memory.dmp

Filesize
16KB

Download
memory/3692-158-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/3692-147-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/3692-148-0x0000000010000000-0x000000001000B000-memory.dmp

Filesize
44KB

Download
memory/3692-137-0x0000000000000000-mapping.dmp

Download
memory/5000-132-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/5000-150-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download