metasploit | 1ef8f2c238e900188ff12939f52a4b50a3a62a08ba543d0d8b7eb8629f68da60

General

Target
0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe
Size 191KB
Sample240621-smwcdsvgkh
SHA256 1ef8f2c238e900188ff12939f52a4b50a3a62a08ba543d0d8b7eb8629f68da60
MD5 0c983207277d2f961108a17ce0fbcb3f
SHA1 d71f3c53a9deeb021faff1e825307086967185d5
SHA512 1c027fdb71d6a55935cc5bb257307a87cfefc08b1ecf5296ac316220cc2bf39dd6e37d7248180025980811f688a94d98cf467ff5e12503f13d8a2c7b144a9a5b
SSDEEP 3072:ZWdm/xH5MtXGixXV26LT92JP6YabBjs9Te60:oXR4OTGP6gV90
MD5 SHA1 SHA512 SSDEEP

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 3 TTPs 8 IoCs

evasion

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	wmpsk86.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	wmpsk86.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications	wmpsk86.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Windows\SysWOW64\wmpsk86.exe = "C:\\Windows\\SysWOW64\\wmpsk86.exe:*:Enabled:Windows Task Scheduler"	wmpsk86.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List	wmpsk86.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile	wmpsk86.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications	wmpsk86.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List\C:\Windows\SysWOW64\wmpsk86.exe = "C:\\Windows\\SysWOW64\\wmpsk86.exe:*:Enabled:Windows Task Scheduler"	wmpsk86.exe

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
1120	wmpsk86.exe

Executes dropped EXE 2 IoCs

pid	Process
2664	wmpsk86.exe
1120	wmpsk86.exe

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1616-0-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral2/memory/1616-2-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral2/memory/1616-3-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral2/memory/1616-4-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral2/memory/1120-42-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral2/memory/1616-44-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral2/memory/1120-46-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral2/memory/1120-47-0x0000000000400000-0x000000000044C000-memory.dmp	upx
behavioral2/memory/1120-48-0x0000000000400000-0x000000000044C000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Task Scheduler = "C:\\Windows\\SysWOW64\\wmpsk86.exe"	wmpsk86.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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	wmpsk86.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	wmpsk86.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\wmpsk86.exe	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\wmpsk86.exe	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\	wmpsk86.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2532 set thread context of 1616	2532	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe	81
PID 2664 set thread context of 1120	2664	wmpsk86.exe	83

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1616	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe
1616	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe
1616	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe
1616	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe
1120	wmpsk86.exe
1120	wmpsk86.exe
1120	wmpsk86.exe
1120	wmpsk86.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2532 wrote to memory of 1616	2532	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe	81
PID 2532 wrote to memory of 1616	2532	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe	81
PID 2532 wrote to memory of 1616	2532	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe	81
PID 2532 wrote to memory of 1616	2532	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe	81
PID 2532 wrote to memory of 1616	2532	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe	81
PID 2532 wrote to memory of 1616	2532	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe	81
PID 2532 wrote to memory of 1616	2532	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe	81
PID 1616 wrote to memory of 2664	1616	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe	82
PID 1616 wrote to memory of 2664	1616	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe	82
PID 1616 wrote to memory of 2664	1616	0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe	82
PID 2664 wrote to memory of 1120	2664	wmpsk86.exe	83
PID 2664 wrote to memory of 1120	2664	wmpsk86.exe	83
PID 2664 wrote to memory of 1120	2664	wmpsk86.exe	83
PID 2664 wrote to memory of 1120	2664	wmpsk86.exe	83
PID 2664 wrote to memory of 1120	2664	wmpsk86.exe	83
PID 2664 wrote to memory of 1120	2664	wmpsk86.exe	83
PID 2664 wrote to memory of 1120	2664	wmpsk86.exe	83
PID 1120 wrote to memory of 3460	1120	wmpsk86.exe	56
PID 1120 wrote to memory of 3460	1120	wmpsk86.exe	56

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3460
- C:\Users\Admin\AppData\Local\Temp\0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:2532
- - C:\Users\Admin\AppData\Local\Temp\0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\0c983207277d2f961108a17ce0fbcb3f_JaffaCakes118.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:1616
  - - C:\Windows\SysWOW64\wmpsk86.exe
      "C:\Windows\SysWOW64\wmpsk86.exe" C:\Users\Admin\AppData\Local\Temp\0C9832~1.EXE
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:2664
    - - C:\Windows\SysWOW64\wmpsk86.exe
        
        "C:\Windows\SysWOW64\wmpsk86.exe" C:\Users\Admin\AppData\Local\Temp\0C9832~1.EXE
        5⤵
        Modifies firewall policy service
        Deletes itself
        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:1120

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

wmpsk86.exe

Path C:\Windows\SysWOW64\wmpsk86.exe
Size 191KB
SHA256 1ef8f2c238e900188ff12939f52a4b50a3a62a08ba543d0d8b7eb8629f68da60
MD5 0c983207277d2f961108a17ce0fbcb3f
SHA1 d71f3c53a9deeb021faff1e825307086967185d5
SHA512 1c027fdb71d6a55935cc5bb257307a87cfefc08b1ecf5296ac316220cc2bf39dd6e37d7248180025980811f688a94d98cf467ff5e12503f13d8a2c7b144a9a5b
SSDEEP 3072:ZWdm/xH5MtXGixXV26LT92JP6YabBjs9Te60:oXR4OTGP6gV90
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1120-42-0x0000000000400000-0x000000000044C000-memory.dmp

Download

memory/1120-46-0x0000000000400000-0x000000000044C000-memory.dmp

Download

memory/1120-47-0x0000000000400000-0x000000000044C000-memory.dmp

Download

memory/1120-48-0x0000000000400000-0x000000000044C000-memory.dmp

Download

memory/1616-0-0x0000000000400000-0x000000000044C000-memory.dmp

Download

memory/1616-2-0x0000000000400000-0x000000000044C000-memory.dmp

Download

memory/1616-3-0x0000000000400000-0x000000000044C000-memory.dmp

Download

memory/1616-4-0x0000000000400000-0x000000000044C000-memory.dmp

Download

memory/1616-44-0x0000000000400000-0x000000000044C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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