Malware Analysis Report

2024-08-06 14:47

Sample ID 240615-14fl9szhpr
Target b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118
SHA256 5f5e91ec90f4e5afb30a76069d2e3036247b15d79a10d8561dc9856e3854b3c0
Tags
nanocore evasion keylogger persistence spyware stealer trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

5f5e91ec90f4e5afb30a76069d2e3036247b15d79a10d8561dc9856e3854b3c0

Threat Level: Known bad

The file b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

nanocore evasion keylogger persistence spyware stealer trojan

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

"C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe"

Signatures

NanoCore

keylogger trojan stealer spyware nanocore

Adds Run key to start application

persistence
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

evasion trojan
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

Opens file in notepad (likely ransom note)

ransomware
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:\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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
N/A N/A C:\Windows\SysWOW64\notepad.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
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

Description Indicator Process Target
PID 2452 wrote to memory of 1192 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe
PID 2452 wrote to memory of 1192 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe
PID 2452 wrote to memory of 1192 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe
PID 2452 wrote to memory of 1192 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe
PID 2452 wrote to memory of 1192 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe
PID 2452 wrote to memory of 1192 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe
PID 2452 wrote to memory of 1192 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe
PID 2452 wrote to memory 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 wrote to memory 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 wrote to memory 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 wrote to memory 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 wrote to memory 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 wrote to memory 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 wrote to memory 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 wrote to memory 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 wrote to memory 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 wrote to memory of 2816 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\SysWOW64\notepad.exe
PID 2452 wrote to memory of 2816 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\SysWOW64\notepad.exe
PID 2452 wrote to memory of 2816 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\SysWOW64\notepad.exe
PID 2452 wrote to memory of 2816 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\SysWOW64\notepad.exe
PID 2452 wrote to memory of 2816 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\SysWOW64\notepad.exe
PID 2452 wrote to memory of 2816 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\SysWOW64\notepad.exe

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

"C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe"

Signatures

NanoCore

keylogger trojan stealer spyware nanocore

Adds Run key to start application

persistence
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

evasion trojan
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

Opens file in notepad (likely ransom note)

ransomware
Description Indicator Process Target
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

Description Indicator Process Target
PID 1580 wrote to memory 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 wrote to memory 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 wrote to memory 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 wrote to memory 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 wrote to memory 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 wrote to memory of 4876 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\SysWOW64\notepad.exe
PID 1580 wrote to memory of 4876 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\SysWOW64\notepad.exe
PID 1580 wrote to memory of 4876 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\SysWOW64\notepad.exe
PID 1580 wrote to memory of 4876 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\SysWOW64\notepad.exe
PID 1580 wrote to memory of 4876 N/A C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe C:\Windows\SysWOW64\notepad.exe

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