metasploit | b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327

General

Target

b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
Size

251KB
MD5

a8bee4bca5b596bbe4adc784a054a032
SHA1

bb58394e02f8729351dc1ca8594f37e5f9fcc179
SHA256

b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327
SHA512

afb58031e1b8f37cfa064a0f44411981c970ccccacbbd0cd64c2f3a4d87b839b2dff8dd7fd962c0f55be2fc9b2277522bed9af89ae76d44b5d538af624fa8b80
SSDEEP

3072:tZOShov9cYu7tStjKHXlavBi9H+0eoa5aWnlCd1PPFzuDupxRwGDKs8nZsRZ:trhoAWsXCWleFaVnzuds8Zsr

Score

10^/10

metasploit backdoor evasion persistence trojan upx

Malware Config

Extracted

Family

metasploit

Version

encoder/call4_dword_xor

Signatures

MetaSploit
Detected malicious payload which is part of the Metasploit Framework, likely generated with msfvenom or similar.
trojan backdoor metasploit

Modifies firewall policy service 2 TTPs 8 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

Processes:

wmpvr32.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List\C:\Windows\SysWOW64\wmpvr32.exe = "C:\\Windows\\SysWOW64\\wmpvr32.exe:*:Enabled:Windows Media iVision"	wmpvr32.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	wmpvr32.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	wmpvr32.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications	wmpvr32.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Windows\SysWOW64\wmpvr32.exe = "C:\\Windows\\SysWOW64\\wmpvr32.exe:*:Enabled:Windows Media iVision"	wmpvr32.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List	wmpvr32.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile	wmpvr32.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications	wmpvr32.exe

Executes dropped EXE 2 IoCs

Processes:

wmpvr32.exewmpvr32.exe

pid process

4764 wmpvr32.exe
3664 wmpvr32.exe

pid	process
4764	wmpvr32.exe
3664	wmpvr32.exe

UPX packed file 8 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4440-133-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/4440-135-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/4440-136-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/4440-137-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/4440-141-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/3664-146-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/3664-147-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral2/memory/3664-148-0x0000000000400000-0x0000000000467000-memory.dmp	upx

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wmpvr32.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	wmpvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Media iVision = "C:\\Windows\\SysWOW64\\wmpvr32.exe"	wmpvr32.exe

Maps connected drives based on registry 3 TTPs 4 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

wmpvr32.exeb759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	wmpvr32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	wmpvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe

Drops file in System32 directory 5 IoCs

Processes:

b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exewmpvr32.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
File opened for modification	C:\Windows\SysWOW64\wmpvr32.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
File created	C:\Windows\SysWOW64\wmpvr32.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
File opened for modification	C:\Windows\SysWOW64\	wmpvr32.exe
File opened for modification	C:\Windows\SysWOW64\wmpvr32.exe	wmpvr32.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exewmpvr32.exe

description	pid	process	target process
PID 2872 set thread context of 4440	2872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 4764 set thread context of 3664	4764	wmpvr32.exe	wmpvr32.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies registry class 1 IoCs

Processes:

b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

Processes:

b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exewmpvr32.exe

pid	process
4440	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
4440	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
4440	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
4440	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
3664	wmpvr32.exe
3664	wmpvr32.exe
3664	wmpvr32.exe
3664	wmpvr32.exe
3664	wmpvr32.exe
3664	wmpvr32.exe
3664	wmpvr32.exe
3664	wmpvr32.exe
3664	wmpvr32.exe
3664	wmpvr32.exe
3664	wmpvr32.exe
3664	wmpvr32.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exeb759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exewmpvr32.exewmpvr32.exe

description	pid	process	target process
PID 2872 wrote to memory of 4440	2872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 2872 wrote to memory of 4440	2872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 2872 wrote to memory of 4440	2872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 2872 wrote to memory of 4440	2872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 2872 wrote to memory of 4440	2872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 2872 wrote to memory of 4440	2872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 2872 wrote to memory of 4440	2872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 2872 wrote to memory of 4440	2872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 4440 wrote to memory of 4764	4440	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	wmpvr32.exe
PID 4440 wrote to memory of 4764	4440	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	wmpvr32.exe
PID 4440 wrote to memory of 4764	4440	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	wmpvr32.exe
PID 4764 wrote to memory of 3664	4764	wmpvr32.exe	wmpvr32.exe
PID 4764 wrote to memory of 3664	4764	wmpvr32.exe	wmpvr32.exe
PID 4764 wrote to memory of 3664	4764	wmpvr32.exe	wmpvr32.exe
PID 4764 wrote to memory of 3664	4764	wmpvr32.exe	wmpvr32.exe
PID 4764 wrote to memory of 3664	4764	wmpvr32.exe	wmpvr32.exe
PID 4764 wrote to memory of 3664	4764	wmpvr32.exe	wmpvr32.exe
PID 4764 wrote to memory of 3664	4764	wmpvr32.exe	wmpvr32.exe
PID 4764 wrote to memory of 3664	4764	wmpvr32.exe	wmpvr32.exe
PID 3664 wrote to memory of 1272	3664	wmpvr32.exe	Explorer.EXE
PID 3664 wrote to memory of 1272	3664	wmpvr32.exe	Explorer.EXE

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1272

C:\Users\Admin\AppData\Local\Temp\b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
"C:\Users\Admin\AppData\Local\Temp\b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2872

C:\Users\Admin\AppData\Local\Temp\b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
"C:\Users\Admin\AppData\Local\Temp\b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe"
3⤵
- Checks computer location settings
- Maps connected drives based on registry
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4440

C:\Windows\SysWOW64\wmpvr32.exe
"C:\Windows\SysWOW64\wmpvr32.exe" C:\Users\Admin\AppData\Local\Temp\B759D4~1.EXE
4⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4764

C:\Windows\SysWOW64\wmpvr32.exe
"C:\Windows\SysWOW64\wmpvr32.exe" C:\Users\Admin\AppData\Local\Temp\B759D4~1.EXE
5⤵
- Modifies firewall policy service
- Executes dropped EXE
- Adds Run key to start application
- Maps connected drives based on registry
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3664

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\wmpvr32.exe
Filesize
251KB

MD5
a8bee4bca5b596bbe4adc784a054a032

SHA1
bb58394e02f8729351dc1ca8594f37e5f9fcc179

SHA256
b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327

SHA512
afb58031e1b8f37cfa064a0f44411981c970ccccacbbd0cd64c2f3a4d87b839b2dff8dd7fd962c0f55be2fc9b2277522bed9af89ae76d44b5d538af624fa8b80

Download Submit
C:\Windows\SysWOW64\wmpvr32.exe
Filesize
251KB

MD5
a8bee4bca5b596bbe4adc784a054a032

SHA1
bb58394e02f8729351dc1ca8594f37e5f9fcc179

SHA256
b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327

SHA512
afb58031e1b8f37cfa064a0f44411981c970ccccacbbd0cd64c2f3a4d87b839b2dff8dd7fd962c0f55be2fc9b2277522bed9af89ae76d44b5d538af624fa8b80

Download Submit
C:\Windows\SysWOW64\wmpvr32.exe
Filesize
251KB

MD5
a8bee4bca5b596bbe4adc784a054a032

SHA1
bb58394e02f8729351dc1ca8594f37e5f9fcc179

SHA256
b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327

SHA512
afb58031e1b8f37cfa064a0f44411981c970ccccacbbd0cd64c2f3a4d87b839b2dff8dd7fd962c0f55be2fc9b2277522bed9af89ae76d44b5d538af624fa8b80

Download Submit
memory/3664-142-0x0000000000000000-mapping.dmp

Download
memory/3664-146-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/3664-147-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/3664-148-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/4440-137-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/4440-136-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/4440-141-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/4440-135-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/4440-133-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/4440-132-0x0000000000000000-mapping.dmp

Download
memory/4764-138-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads