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 4 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
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

Executes dropped EXE 2 IoCs

Processes:

wmpvr32.exewmpvr32.exe

pid process

1688 wmpvr32.exe
1380 wmpvr32.exe

pid	process
1688	wmpvr32.exe
1380	wmpvr32.exe

UPX packed file 11 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/808-55-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral1/memory/808-57-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral1/memory/808-58-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral1/memory/808-60-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral1/memory/808-64-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral1/memory/808-65-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral1/memory/808-66-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral1/memory/808-71-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral1/memory/1380-84-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral1/memory/1380-85-0x0000000000400000-0x0000000000467000-memory.dmp	upx
behavioral1/memory/1380-86-0x0000000000400000-0x0000000000467000-memory.dmp	upx

Deletes itself 1 IoCs

Processes:

wmpvr32.exe

pid process

1380 wmpvr32.exe

pid	process
1380	wmpvr32.exe

Loads dropped DLL 2 IoCs

Processes:

b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe

pid	process
808	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
808	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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Media iVision = "C:\\Windows\\SysWOW64\\wmpvr32.exe"	wmpvr32.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	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:

b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exewmpvr32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	wmpvr32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	wmpvr32.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 872 set thread context of 808	872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 1688 set thread context of 1380	1688	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

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exewmpvr32.exe

pid	process
808	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
808	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
1380	wmpvr32.exe
1380	wmpvr32.exe
1380	wmpvr32.exe
1380	wmpvr32.exe

Suspicious use of WriteProcessMemory 22 IoCs

Processes:

b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exeb759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exewmpvr32.exewmpvr32.exe

description	pid	process	target process
PID 872 wrote to memory of 808	872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 872 wrote to memory of 808	872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 872 wrote to memory of 808	872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 872 wrote to memory of 808	872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 872 wrote to memory of 808	872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 872 wrote to memory of 808	872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 872 wrote to memory of 808	872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 872 wrote to memory of 808	872	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
PID 808 wrote to memory of 1688	808	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	wmpvr32.exe
PID 808 wrote to memory of 1688	808	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	wmpvr32.exe
PID 808 wrote to memory of 1688	808	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	wmpvr32.exe
PID 808 wrote to memory of 1688	808	b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe	wmpvr32.exe
PID 1688 wrote to memory of 1380	1688	wmpvr32.exe	wmpvr32.exe
PID 1688 wrote to memory of 1380	1688	wmpvr32.exe	wmpvr32.exe
PID 1688 wrote to memory of 1380	1688	wmpvr32.exe	wmpvr32.exe
PID 1688 wrote to memory of 1380	1688	wmpvr32.exe	wmpvr32.exe
PID 1688 wrote to memory of 1380	1688	wmpvr32.exe	wmpvr32.exe
PID 1688 wrote to memory of 1380	1688	wmpvr32.exe	wmpvr32.exe
PID 1688 wrote to memory of 1380	1688	wmpvr32.exe	wmpvr32.exe
PID 1688 wrote to memory of 1380	1688	wmpvr32.exe	wmpvr32.exe
PID 1380 wrote to memory of 1360	1380	wmpvr32.exe	Explorer.EXE
PID 1380 wrote to memory of 1360	1380	wmpvr32.exe	Explorer.EXE

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1360

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:872

C:\Users\Admin\AppData\Local\Temp\b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe
"C:\Users\Admin\AppData\Local\Temp\b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327.exe"
3⤵
- Loads dropped DLL
- Maps connected drives based on registry
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:808

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:1688

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
- Deletes itself
- 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:1380

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

1

T1012

Peripheral Device Discovery

1

T1120

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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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
\Windows\SysWOW64\wmpvr32.exe
Filesize
251KB

MD5
a8bee4bca5b596bbe4adc784a054a032

SHA1
bb58394e02f8729351dc1ca8594f37e5f9fcc179

SHA256
b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327

SHA512
afb58031e1b8f37cfa064a0f44411981c970ccccacbbd0cd64c2f3a4d87b839b2dff8dd7fd962c0f55be2fc9b2277522bed9af89ae76d44b5d538af624fa8b80

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

MD5
a8bee4bca5b596bbe4adc784a054a032

SHA1
bb58394e02f8729351dc1ca8594f37e5f9fcc179

SHA256
b759d41b4b8351860c5e9fd076bae283096f434b3d6e4602a3702c94b4c75327

SHA512
afb58031e1b8f37cfa064a0f44411981c970ccccacbbd0cd64c2f3a4d87b839b2dff8dd7fd962c0f55be2fc9b2277522bed9af89ae76d44b5d538af624fa8b80

Download Submit
memory/808-71-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/808-63-0x0000000075B41000-0x0000000075B43000-memory.dmp

Filesize
8KB

Download
memory/808-64-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/808-65-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/808-66-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/808-60-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/808-61-0x000000000044F070-mapping.dmp

Download
memory/808-58-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/808-57-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/808-54-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/808-55-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/1360-87-0x0000000002190000-0x00000000021AE000-memory.dmp

Filesize
120KB

Download
memory/1380-84-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/1380-80-0x000000000044F070-mapping.dmp

Download
memory/1380-85-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/1380-86-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/1688-69-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads