Analysis Overview
SHA256
5f5e91ec90f4e5afb30a76069d2e3036247b15d79a10d8561dc9856e3854b3c0
Threat Level: Known bad
The file b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118 was found to be: Known bad.
Malicious Activity Summary
NanoCore
Adds Run key to start application
Checks whether UAC is enabled
Suspicious use of SetThreadContext
Unsigned PE
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Opens file in notepad (likely ransom note)
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK Matrix V13
Analysis: static1
Detonation Overview
Reported
2024-06-15 22:11
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-15 22:11
Reported
2024-06-15 22:14
Platform
win7-20240611-en
Max time kernel
150s
Max time network
145s
Command Line
Signatures
NanoCore
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2812790648-3157963462-487717889-1000\Software\Microsoft\Windows\CurrentVersion\Run\ = "C:\\Users\\Admin\\AppData\\Roaming\\dtfdygfuhh\\tfghjuku.exe" | C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe | N/A |
Checks whether UAC is enabled
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA | C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2452 set thread context of 2124 | N/A | C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe | C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe |
| PID 2452 set thread context of 2816 | N/A | C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe | C:\Windows\SysWOW64\notepad.exe |
Opens file in notepad (likely ransom note)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\notepad.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe"
C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe
"C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe"
C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe
"C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe"
C:\Windows\SysWOW64\notepad.exe
persistencecmd 0 "C:\Users\Admin\AppData\Roaming\dtfdygfuhh\tfghjuku.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | tallboy.zapto.org | udp |
| US | 184.105.192.5:2669 | tallboy.zapto.org | tcp |
| US | 8.8.8.8:53 | tallboy.zapto.org | udp |
| US | 184.105.192.5:2669 | tallboy.zapto.org | tcp |
| US | 8.8.8.8:53 | tallboy.zapto.org | udp |
| US | 184.105.192.5:2669 | tallboy.zapto.org | tcp |
| US | 8.8.8.8:53 | tallboy.zapto.org | udp |
| US | 184.105.192.5:2669 | tallboy.zapto.org | tcp |
| US | 8.8.8.8:53 | tallboy.zapto.org | udp |
| US | 184.105.192.5:2669 | tallboy.zapto.org | tcp |
| US | 8.8.8.8:53 | tallboy.zapto.org | udp |
| US | 184.105.192.5:2669 | tallboy.zapto.org | tcp |
Files
memory/2452-0-0x0000000000220000-0x0000000000221000-memory.dmp
memory/2452-1-0x0000000003170000-0x0000000003265000-memory.dmp
memory/2124-3-0x0000000000400000-0x0000000000438000-memory.dmp
memory/2124-6-0x0000000000400000-0x0000000000438000-memory.dmp
memory/2124-8-0x0000000000400000-0x0000000000438000-memory.dmp
memory/2816-9-0x0000000000400000-0x00000000004D1000-memory.dmp
memory/2816-13-0x0000000000400000-0x00000000004D1000-memory.dmp
memory/2452-14-0x0000000003170000-0x0000000003265000-memory.dmp
memory/2452-11-0x0000000000400000-0x00000000004D1000-memory.dmp
memory/2816-12-0x0000000000400000-0x00000000004D1000-memory.dmp
memory/2816-10-0x0000000000400000-0x00000000004D1000-memory.dmp
memory/2816-15-0x0000000000120000-0x0000000000121000-memory.dmp
memory/2124-16-0x0000000074972000-0x0000000074974000-memory.dmp
memory/2816-17-0x0000000003150000-0x0000000003245000-memory.dmp
memory/2124-19-0x0000000000AB0000-0x0000000000AF0000-memory.dmp
memory/2816-20-0x0000000000400000-0x00000000004D1000-memory.dmp
memory/2124-21-0x0000000074972000-0x0000000074974000-memory.dmp
memory/2816-22-0x0000000003150000-0x0000000003245000-memory.dmp
memory/2124-23-0x0000000000AB0000-0x0000000000AF0000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-15 22:11
Reported
2024-06-15 22:14
Platform
win10v2004-20240508-en
Max time kernel
134s
Max time network
143s
Command Line
Signatures
NanoCore
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dtfdygfuhh\ = "C:\\Users\\Admin\\AppData\\Roaming\\dtfdygfuhh\\tfghjuku.exe" | C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe | N/A |
Checks whether UAC is enabled
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA | C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 1580 set thread context of 3692 | N/A | C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe | C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe |
| PID 1580 set thread context of 4876 | N/A | C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe | C:\Windows\SysWOW64\notepad.exe |
Opens file in notepad (likely ransom note)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\notepad.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe | N/A |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe | N/A |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe | N/A |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\notepad.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\notepad.exe | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe"
C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe
"C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe"
C:\Windows\SysWOW64\notepad.exe
persistencecmd 548 "C:\Users\Admin\AppData\Roaming\dtfdygfuhh\tfghjuku.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tallboy.zapto.org | udp |
| US | 8.8.4.4:53 | tallboy.zapto.org | udp |
| US | 8.8.8.8:53 | 4.4.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tallboy.zapto.org | udp |
| US | 8.8.8.8:53 | tallboy.zapto.org | udp |
| US | 8.8.4.4:53 | tallboy.zapto.org | udp |
| US | 8.8.8.8:53 | tallboy.zapto.org | udp |
| US | 8.8.8.8:53 | tallboy.zapto.org | udp |
| US | 8.8.4.4:53 | tallboy.zapto.org | udp |
| US | 8.8.8.8:53 | tallboy.zapto.org | udp |
| US | 8.8.8.8:53 | tallboy.zapto.org | udp |
| US | 8.8.4.4:53 | tallboy.zapto.org | udp |
| US | 8.8.8.8:53 | tallboy.zapto.org | udp |
Files
memory/1580-0-0x0000000002140000-0x0000000002141000-memory.dmp
memory/1580-2-0x0000000002750000-0x0000000002845000-memory.dmp
memory/3692-3-0x0000000000400000-0x0000000000438000-memory.dmp
memory/4876-5-0x0000000000400000-0x00000000004D1000-memory.dmp
memory/4876-6-0x0000000000400000-0x00000000004D1000-memory.dmp
memory/4876-9-0x0000000000400000-0x00000000004D1000-memory.dmp
memory/4876-10-0x0000000000400000-0x00000000004D1000-memory.dmp
memory/1580-8-0x0000000002750000-0x0000000002845000-memory.dmp
memory/1580-7-0x0000000000400000-0x00000000004D1000-memory.dmp
memory/3692-12-0x0000000074E32000-0x0000000074E33000-memory.dmp
memory/4876-11-0x0000000001500000-0x0000000001501000-memory.dmp
memory/3692-13-0x0000000074E30000-0x00000000753E1000-memory.dmp
memory/3692-14-0x0000000074E30000-0x00000000753E1000-memory.dmp
memory/4876-15-0x0000000004C10000-0x0000000004D05000-memory.dmp
memory/4876-17-0x0000000000400000-0x00000000004D1000-memory.dmp
memory/4876-18-0x0000000004C10000-0x0000000004D05000-memory.dmp
memory/3692-19-0x0000000074E32000-0x0000000074E33000-memory.dmp
memory/3692-20-0x0000000074E30000-0x00000000753E1000-memory.dmp