nanocore | 5f5e91ec90f4e5afb30a76069d2e3036247b15d79a10d8561dc9856e3854b3c0

Analysis

max time kernel
134s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
15-06-2024 22:11

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General

Target

b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe
Size

1013KB
MD5

b05c46f14ddf7ebfaab396f9f540787e
SHA1

ca2f0b7950ac3697e672c98190eb04f386e65ac3
SHA256

5f5e91ec90f4e5afb30a76069d2e3036247b15d79a10d8561dc9856e3854b3c0
SHA512

f19d16c7545718bc5e27dea8249478f703d1cea905dbbbd0678825c67c34beb9d1c2060502075765e5545c536ecf5450f7b62d4bd390a04a9e88f7b7a4e5ddb4
SSDEEP

24576:HHSSMkz9i+LFsxkrxiLMQQ6LPAshFiFeH1:HH9B5Cxk9JeH1

Score

10^/10

nanocore evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

tallboy.zapto.org:2669

Mutex

721e5ca6-2a7d-4e47-90be-697197d2647d

Attributes

activate_away_mode
true
backup_connection_host
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2017-05-09T08:28:08.263783636Z
bypass_user_account_control
true
bypass_user_account_control_data
clear_access_control
true
clear_zone_identifier
true
connect_delay
4000
connection_port
2669
default_group
PM
enable_debug_mode
true
gc_threshold
1.048576e+07
keep_alive_timeout
30000
keyboard_logging
false
lan_timeout
2500
max_packet_size
1.048576e+07
mutex
721e5ca6-2a7d-4e47-90be-697197d2647d
mutex_timeout
5000
prevent_system_sleep
true
primary_connection_host
tallboy.zapto.org
primary_dns_server
8.8.8.8
request_elevation
true
restart_delay
5000
run_delay
0
run_on_startup
true
set_critical_process
true
timeout_interval
5000
use_custom_dns_server
false
version
1.2.2.0
wan_timeout
8000

Signatures

NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
keylogger trojan stealer spyware nanocore

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe

description	ioc	process
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"	b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

regasm.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA regasm.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	regasm.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe

description	pid	process	target process
PID 1580 set thread context of 3692	1580	b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe	regasm.exe
PID 1580 set thread context of 4876	1580	b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe	notepad.exe

Opens file in notepad (likely ransom note) 1 IoCs
ransomware

Processes:

notepad.exe

pid process

4876 notepad.exe
Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exeregasm.exenotepad.exe

pid process

1580 b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe
1580 b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe
3692 regasm.exe
3692 regasm.exe
3692 regasm.exe
4876 notepad.exe
4876 notepad.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

regasm.exe

pid process

3692 regasm.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

regasm.exe

description pid process

Token: SeDebugPrivilege 3692 regasm.exe

pid	process
4876	notepad.exe

pid	process
1580	b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe
1580	b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe
3692	regasm.exe
3692	regasm.exe
3692	regasm.exe
4876	notepad.exe
4876	notepad.exe

pid	process
3692	regasm.exe

description	pid	process
Token: SeDebugPrivilege	3692	regasm.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe

description	pid	process	target process
PID 1580 wrote to memory of 3692	1580	b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe	regasm.exe
PID 1580 wrote to memory of 3692	1580	b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe	regasm.exe
PID 1580 wrote to memory of 3692	1580	b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe	regasm.exe
PID 1580 wrote to memory of 3692	1580	b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe	regasm.exe
PID 1580 wrote to memory of 3692	1580	b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe	regasm.exe
PID 1580 wrote to memory of 4876	1580	b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe	notepad.exe
PID 1580 wrote to memory of 4876	1580	b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe	notepad.exe
PID 1580 wrote to memory of 4876	1580	b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe	notepad.exe
PID 1580 wrote to memory of 4876	1580	b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe	notepad.exe
PID 1580 wrote to memory of 4876	1580	b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe	notepad.exe

C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b05c46f14ddf7ebfaab396f9f540787e_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1580

C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe
"C:\Windows\Microsoft.NET\Framework\v2.0.50727\regasm.exe"
2⤵
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:3692

C:\Windows\SysWOW64\notepad.exe
persistencecmd 548 "C:\Users\Admin\AppData\Roaming\dtfdygfuhh\tfghjuku.exe"
2⤵
- Opens file in notepad (likely ransom note)
- Suspicious behavior: EnumeratesProcesses
PID:4876

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

memory/1580-8-0x0000000002750000-0x0000000002845000-memory.dmp

Filesize
980KB

Download
memory/1580-2-0x0000000002750000-0x0000000002845000-memory.dmp

Filesize
980KB

Download
memory/1580-0-0x0000000002140000-0x0000000002141000-memory.dmp

Filesize
4KB

Download
memory/1580-7-0x0000000000400000-0x00000000004D1000-memory.dmp

Filesize
836KB

Download
memory/3692-14-0x0000000074E30000-0x00000000753E1000-memory.dmp

Filesize
5.7MB

Download
memory/3692-13-0x0000000074E30000-0x00000000753E1000-memory.dmp

Filesize
5.7MB

Download
memory/3692-20-0x0000000074E30000-0x00000000753E1000-memory.dmp

Filesize
5.7MB

Download
memory/3692-19-0x0000000074E32000-0x0000000074E33000-memory.dmp

Filesize
4KB

Download
memory/3692-3-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3692-12-0x0000000074E32000-0x0000000074E33000-memory.dmp

Filesize
4KB

Download
memory/4876-5-0x0000000000400000-0x00000000004D1000-memory.dmp

Filesize
836KB

Download
memory/4876-11-0x0000000001500000-0x0000000001501000-memory.dmp

Filesize
4KB

Download
memory/4876-9-0x0000000000400000-0x00000000004D1000-memory.dmp

Filesize
836KB

Download
memory/4876-15-0x0000000004C10000-0x0000000004D05000-memory.dmp

Filesize
980KB

Download
memory/4876-17-0x0000000000400000-0x00000000004D1000-memory.dmp

Filesize
836KB

Download
memory/4876-18-0x0000000004C10000-0x0000000004D05000-memory.dmp

Filesize
980KB

Download
memory/4876-6-0x0000000000400000-0x00000000004D1000-memory.dmp

Filesize
836KB

Download
memory/4876-10-0x0000000000400000-0x00000000004D1000-memory.dmp

Filesize
836KB

Download