nanocore | a94655a1a6d780670884990dfa1cf59d95d719e02f4a7a9737b4969816295f64

General

Target

Update-200525DOC.exe
Size

353KB
MD5

fb45da8e0aa0fb03696de7498735b56d
SHA1

a4bb2beb734c145ad687138d081ddaf129737387
SHA256

9ebbce05386dc6f05026aeafab2a76868a4e016108b852b8fba849130d4c7c12
SHA512

414236d7613e5b13cf69f3be44ed38eae1c06094af825f870bbb0030dde987d6f5288d776fb9b602eedc104cad8b70ea02b651fb16d704c8a32ade55a328a8b0

Score

10^/10

nanocore evasion keylogger spyware stealer suricata trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

sack517.ddns.net:5656

sack517.duckdns.org:5656

Mutex

c7a8fda1-e948-4efe-8823-4e1fe1d7a7c1

Attributes

activate_away_mode
true
backup_connection_host
sack517.duckdns.org
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-03-02T00:28:26.601869136Z
bypass_user_account_control
true
bypass_user_account_control_data
clear_access_control
true
clear_zone_identifier
true
connect_delay
4000
connection_port
5656
default_group
SACK
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
c7a8fda1-e948-4efe-8823-4e1fe1d7a7c1
mutex_timeout
5000
prevent_system_sleep
true
primary_connection_host
sack517.ddns.net
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
suricata: ET MALWARE Possible NanoCore C2 60B
suricata: ET MALWARE Possible NanoCore C2 60B
suricata
Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Update-200525DOC.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Update-200525DOC.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Update-200525DOC.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

Update-200525DOC.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	Update-200525DOC.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	Update-200525DOC.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Update-200525DOC.exe

description pid process target process

PID 632 set thread context of 2040 632 Update-200525DOC.exe MSBuild.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

2032 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

MSBuild.exe

pid process

2040 MSBuild.exe
2040 MSBuild.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

MSBuild.exe

pid process

2040 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

MSBuild.exe

description pid process

Token: SeDebugPrivilege 2040 MSBuild.exe

description	pid	process	target process
PID 632 set thread context of 2040	632	Update-200525DOC.exe	MSBuild.exe

pid	process
2032	schtasks.exe

pid	process
2040	MSBuild.exe
2040	MSBuild.exe

pid	process
2040	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	2040	MSBuild.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

Update-200525DOC.exe

description	pid	process	target process
PID 632 wrote to memory of 2032	632	Update-200525DOC.exe	schtasks.exe
PID 632 wrote to memory of 2032	632	Update-200525DOC.exe	schtasks.exe
PID 632 wrote to memory of 2032	632	Update-200525DOC.exe	schtasks.exe
PID 632 wrote to memory of 2032	632	Update-200525DOC.exe	schtasks.exe
PID 632 wrote to memory of 2040	632	Update-200525DOC.exe	MSBuild.exe
PID 632 wrote to memory of 2040	632	Update-200525DOC.exe	MSBuild.exe
PID 632 wrote to memory of 2040	632	Update-200525DOC.exe	MSBuild.exe
PID 632 wrote to memory of 2040	632	Update-200525DOC.exe	MSBuild.exe
PID 632 wrote to memory of 2040	632	Update-200525DOC.exe	MSBuild.exe
PID 632 wrote to memory of 2040	632	Update-200525DOC.exe	MSBuild.exe
PID 632 wrote to memory of 2040	632	Update-200525DOC.exe	MSBuild.exe
PID 632 wrote to memory of 2040	632	Update-200525DOC.exe	MSBuild.exe
PID 632 wrote to memory of 2040	632	Update-200525DOC.exe	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\Update-200525DOC.exe
"C:\Users\Admin\AppData\Local\Temp\Update-200525DOC.exe"
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:632

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\HglQWXtPDCr" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2731.tmp"
2⤵
- Creates scheduled task(s)
PID:2032

C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
"{path}"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:2040

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Query Registry

4

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

3

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp2731.tmp
Filesize
1KB

MD5
9e6963db612f83a7d112169d93dcfba3

SHA1
a7e3453cec98e4093785f65c7f85561465a8b779

SHA256
7d0fbef737f225fb69686c210383b9a84e95aa6cfd760daa096fbc7c31ed1720

SHA512
e25ffaa53133814010c33aec15ca3cec058feab650f4bac860ac185c3a1e60915c43052c847b27addaa178dc864880c76ab207e0ccf9cd9e2cf89e35e9a4f013

Download Submit
memory/632-54-0x0000000075391000-0x0000000075393000-memory.dmp

Filesize
8KB

Download
memory/632-55-0x0000000074AD0000-0x000000007507B000-memory.dmp

Filesize
5.7MB

Download
memory/2032-56-0x0000000000000000-mapping.dmp

Download
memory/2040-61-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2040-59-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2040-58-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2040-62-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2040-64-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2040-65-0x000000000041E792-mapping.dmp

Download
memory/2040-67-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2040-69-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2040-71-0x0000000074AD0000-0x000000007507B000-memory.dmp

Filesize
5.7MB

Download
memory/2040-72-0x00000000004C6000-0x00000000004D7000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads