metasploit | 31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df

General

Target

31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe
Size

146KB
MD5

9cc162dc30cd17eaf8efede2ebcc0c8c
SHA1

b267c9a8c78b0a601931538ac0f805186b9fee92
SHA256

31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df
SHA512

07f9c6ada30256048d1fa7b71dc1f44fa3678cf23371f7a90a8a91d8457aa10c8b40aaa316d5705c5620e6650f3dd9faf65d17caaa7cd19dc61ee6e45023f210

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:

wmpbk86.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Windows\SysWOW64\wmpbk86.exe = "C:\\Windows\\SysWOW64\\wmpbk86.exe:*:Enabled:Windows Backup Service"	wmpbk86.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List	wmpbk86.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List\C:\Windows\SysWOW64\wmpbk86.exe = "C:\\Windows\\SysWOW64\\wmpbk86.exe:*:Enabled:Windows Backup Service"	wmpbk86.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	wmpbk86.exe

Executes dropped EXE 2 IoCs

Processes:

wmpbk86.exewmpbk86.exe

pid process

984 wmpbk86.exe
1632 wmpbk86.exe

pid	process
984	wmpbk86.exe
1632	wmpbk86.exe

UPX packed file 12 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/240-56-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/240-58-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/240-59-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/240-62-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/240-63-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/240-64-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/240-65-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/240-66-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/240-67-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/240-82-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/1632-83-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral1/memory/1632-84-0x0000000000400000-0x000000000044C000-memory.dmp	upx

Deletes itself 1 IoCs

Processes:

wmpbk86.exe

pid process

1632 wmpbk86.exe
Loads dropped DLL 1 IoCs

Processes:

31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe

pid process

240 31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe

pid	process
1632	wmpbk86.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wmpbk86.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	wmpbk86.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Backup Service = "C:\\Windows\\SysWOW64\\wmpbk86.exe"	wmpbk86.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:

31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exewmpbk86.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	wmpbk86.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	wmpbk86.exe

Drops file in System32 directory 4 IoCs

Processes:

wmpbk86.exe31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\	wmpbk86.exe
File opened for modification	C:\Windows\SysWOW64\	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe
File opened for modification	C:\Windows\SysWOW64\wmpbk86.exe	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe
File created	C:\Windows\SysWOW64\wmpbk86.exe	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exewmpbk86.exe

description	pid	process	target process
PID 1884 set thread context of 240	1884	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe
PID 984 set thread context of 1632	984	wmpbk86.exe	wmpbk86.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 4 IoCs

Processes:

31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exewmpbk86.exe

pid	process
240	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe
240	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe
1632	wmpbk86.exe
1632	wmpbk86.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exewmpbk86.exewmpbk86.exe

description	pid	process	target process
PID 1884 wrote to memory of 240	1884	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe
PID 1884 wrote to memory of 240	1884	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe
PID 1884 wrote to memory of 240	1884	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe
PID 1884 wrote to memory of 240	1884	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe
PID 1884 wrote to memory of 240	1884	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe
PID 1884 wrote to memory of 240	1884	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe
PID 1884 wrote to memory of 240	1884	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe
PID 240 wrote to memory of 984	240	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe	wmpbk86.exe
PID 240 wrote to memory of 984	240	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe	wmpbk86.exe
PID 240 wrote to memory of 984	240	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe	wmpbk86.exe
PID 240 wrote to memory of 984	240	31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe	wmpbk86.exe
PID 984 wrote to memory of 1632	984	wmpbk86.exe	wmpbk86.exe
PID 984 wrote to memory of 1632	984	wmpbk86.exe	wmpbk86.exe
PID 984 wrote to memory of 1632	984	wmpbk86.exe	wmpbk86.exe
PID 984 wrote to memory of 1632	984	wmpbk86.exe	wmpbk86.exe
PID 984 wrote to memory of 1632	984	wmpbk86.exe	wmpbk86.exe
PID 984 wrote to memory of 1632	984	wmpbk86.exe	wmpbk86.exe
PID 984 wrote to memory of 1632	984	wmpbk86.exe	wmpbk86.exe
PID 1632 wrote to memory of 1192	1632	wmpbk86.exe	Explorer.EXE
PID 1632 wrote to memory of 1192	1632	wmpbk86.exe	Explorer.EXE

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1192

C:\Users\Admin\AppData\Local\Temp\31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe
"C:\Users\Admin\AppData\Local\Temp\31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1884

C:\Users\Admin\AppData\Local\Temp\31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe
"C:\Users\Admin\AppData\Local\Temp\31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df.exe"
3⤵
- Loads dropped DLL
- Maps connected drives based on registry
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:240

C:\Windows\SysWOW64\wmpbk86.exe
"C:\Windows\SysWOW64\wmpbk86.exe" C:\Users\Admin\AppData\Local\Temp\31C52F~1.EXE
4⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:984

C:\Windows\SysWOW64\wmpbk86.exe
"C:\Windows\SysWOW64\wmpbk86.exe" C:\Users\Admin\AppData\Local\Temp\31C52F~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:1632

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\wmpbk86.exe
Filesize
146KB

MD5
9cc162dc30cd17eaf8efede2ebcc0c8c

SHA1
b267c9a8c78b0a601931538ac0f805186b9fee92

SHA256
31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df

SHA512
07f9c6ada30256048d1fa7b71dc1f44fa3678cf23371f7a90a8a91d8457aa10c8b40aaa316d5705c5620e6650f3dd9faf65d17caaa7cd19dc61ee6e45023f210

Download Submit
C:\Windows\SysWOW64\wmpbk86.exe
Filesize
146KB

MD5
9cc162dc30cd17eaf8efede2ebcc0c8c

SHA1
b267c9a8c78b0a601931538ac0f805186b9fee92

SHA256
31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df

SHA512
07f9c6ada30256048d1fa7b71dc1f44fa3678cf23371f7a90a8a91d8457aa10c8b40aaa316d5705c5620e6650f3dd9faf65d17caaa7cd19dc61ee6e45023f210

Download Submit
\Windows\SysWOW64\wmpbk86.exe
Filesize
146KB

MD5
9cc162dc30cd17eaf8efede2ebcc0c8c

SHA1
b267c9a8c78b0a601931538ac0f805186b9fee92

SHA256
31c52fec2654717cb5b0d04c9fce32b41229af3e13d0507e2518e798f089b6df

SHA512
07f9c6ada30256048d1fa7b71dc1f44fa3678cf23371f7a90a8a91d8457aa10c8b40aaa316d5705c5620e6650f3dd9faf65d17caaa7cd19dc61ee6e45023f210

Download Submit
memory/240-66-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/240-58-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/240-61-0x0000000075191000-0x0000000075193000-memory.dmp

Filesize
8KB

Download
memory/240-62-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/240-63-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/240-64-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/240-65-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/240-54-0x0000000000000000-mapping.dmp

Download
memory/240-67-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/240-59-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/240-56-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/240-82-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/240-55-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/984-69-0x0000000000000000-mapping.dmp

Download
memory/1192-85-0x0000000002AC0000-0x0000000002ADE000-memory.dmp

Filesize
120KB

Download
memory/1632-71-0x0000000000000000-mapping.dmp

Download
memory/1632-83-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/1632-84-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads