ca3bfbec30a54c553ef7a21357f1b3ebd42aee4b800bd710c17d409e13ae777d

General

Target

272ccb3e8558383236815b71cbf1c39f_JaffaCakes118.exe
Size

59KB
MD5

272ccb3e8558383236815b71cbf1c39f
SHA1

a42f24cbfcb3625f7aea6ea17fc9dcb7939f48e9
SHA256

ca3bfbec30a54c553ef7a21357f1b3ebd42aee4b800bd710c17d409e13ae777d
SHA512

6589ab5718a903019dbf90df0e44a5d3eb1b78577f25222b0053e6b0d25e1b5542b64e1ccc2ae8eec96696d29543388f3b4287ba91360ab75f22928d5b81b7a3
SSDEEP

1536:4FJgtakuq3jcoZfOpnJ1FxhQBlutYjw4v7MxxlzJ0/SM:4Otaktt4pnT+Ai4vl0/SM

Score

10^/10

evasion persistence upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\WINDOWS\\SysWOW64\\bvdmss.exe,"	bvdmss.exe

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	bvdmss.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\WINDOWS\SysWOW64\bvdmss.exe = "C:\\WINDOWS\\SysWOW64\\bvdmss.exeC:\\WINDOWS\\system32\\bvdmss.exe:*:Enabled:BVDMSS"	bvdmss.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\WINDOWS\system32\bvdmss.exe = "C:\\WINDOWS\\system32\\bvdmss.exe:*:Enabled:BVDMSS"	bvdmss.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	bvdmss.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\WINDOWS\SysWOW64\bvdmss.exe = "C:\\WINDOWS\\SysWOW64\\bvdmss.exeC:\\WINDOWS\\SysWOW64\\bvdmss.exe:*:Enabled:BVDMSS"	bvdmss.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\WINDOWS\SysWOW64\bvdmss.exe = "C:\\WINDOWS\\SysWOW64\\bvdmss.exe:*:Enabled:BVDMSS"	bvdmss.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	bvdmss.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	bvdmss.exe

Deletes itself 1 IoCs

pid	Process
4840	bvdmss.exe

Executes dropped EXE 2 IoCs

pid	Process
4840	bvdmss.exe
3848	bvdmss.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2260-0-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral2/files/0x0006000000023248-4.dat	upx
behavioral2/memory/2260-6-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral2/memory/3848-9-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral2/memory/4840-10-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral2/memory/3848-11-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral2/memory/4840-15-0x0000000000400000-0x000000000042E000-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 Network Data Management System Service = "\"C:\\WINDOWS\\SysWOW64\\bvdmss.exe\" *"	bvdmss.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\WINDOWS\SysWOW64\bvdmss.exe	272ccb3e8558383236815b71cbf1c39f_JaffaCakes118.exe
File created	C:\WINDOWS\SysWOW64\bvdmss.exe	272ccb3e8558383236815b71cbf1c39f_JaffaCakes118.exe
File opened for modification	C:\WINDOWS\SysWOW64\bvdmss.exe	bvdmss.exe
File created	C:\WINDOWS\SysWOW64\bvdmss.exe	bvdmss.exe

Modifies data under HKEY_USERS 3 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Run	bvdmss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Run\Windows Network Data Management System Service = "\"C:\\WINDOWS\\SysWOW64\\bvdmss.exe\" *"	bvdmss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer	bvdmss.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2260 wrote to memory of 4840	2260	272ccb3e8558383236815b71cbf1c39f_JaffaCakes118.exe	83
PID 2260 wrote to memory of 4840	2260	272ccb3e8558383236815b71cbf1c39f_JaffaCakes118.exe	83
PID 2260 wrote to memory of 4840	2260	272ccb3e8558383236815b71cbf1c39f_JaffaCakes118.exe	83

C:\Users\Admin\AppData\Local\Temp\272ccb3e8558383236815b71cbf1c39f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\272ccb3e8558383236815b71cbf1c39f_JaffaCakes118.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2260
- C:\WINDOWS\SysWOW64\bvdmss.exe
  "C:\WINDOWS\system32\bvdmss.exe" "C:\Users\Admin\AppData\Local\Temp\272ccb3e8558383236815b71cbf1c39f_JaffaCakes118.exe"
  2⤵
  - Modifies firewall policy service
  - Deletes itself
  - Executes dropped EXE
  PID:4840

C:\WINDOWS\SysWOW64\bvdmss.exe
C:\WINDOWS\SysWOW64\bvdmss.exe
1⤵
- Modifies WinLogon for persistence
- Modifies firewall policy service
- Executes dropped EXE
- Adds Run key to start application
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:3848

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\bvdmss.exe

Filesize
59KB

MD5
272ccb3e8558383236815b71cbf1c39f

SHA1
a42f24cbfcb3625f7aea6ea17fc9dcb7939f48e9

SHA256
ca3bfbec30a54c553ef7a21357f1b3ebd42aee4b800bd710c17d409e13ae777d

SHA512
6589ab5718a903019dbf90df0e44a5d3eb1b78577f25222b0053e6b0d25e1b5542b64e1ccc2ae8eec96696d29543388f3b4287ba91360ab75f22928d5b81b7a3

Download Submit
memory/2260-0-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2260-6-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/3848-9-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/3848-11-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/4840-10-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/4840-15-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads