nanocore | 88bb3971c33a10cc7506840cd76e0ae9759b0560ea7bcf73cc22a4b5d64348dd

General

Target

RFQVT-00040520.exe
Size

509KB
MD5

e26983a9e8c443c97181ca8e3f379ca9
SHA1

9b0644c5a2b9f0213cb09a651cc718a286879cc6
SHA256

640477c11295f4211d11bc6adaf108da81e315fd31dfbb02ea2d18e3008b55e5
SHA512

e323e0b1364f89f3eb45e174f38a80217715e1452fa65bc265a68fd7ba0ee434fb84f9f5d9216694a2425598c7534cdcefd3bd0e748d1d099c144005261a8387

Score

10^/10

nanocore evasion keylogger spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

fowok.ddns.net:5656

fowok.duckdns.org:5656

Mutex

7489475d-84cb-4045-9bbe-971598b1bb8d

Attributes

activate_away_mode
true
backup_connection_host
fowok.duckdns.org
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-02-15T01:59:58.454793136Z
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
fowok
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
7489475d-84cb-4045-9bbe-971598b1bb8d
mutex_timeout
5000
prevent_system_sleep
true
primary_connection_host
fowok.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
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:

RFQVT-00040520.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	RFQVT-00040520.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	RFQVT-00040520.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:

RFQVT-00040520.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	RFQVT-00040520.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	RFQVT-00040520.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

RFQVT-00040520.exe

description pid process target process

PID 908 set thread context of 1936 908 RFQVT-00040520.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

636 schtasks.exe
Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

RFQVT-00040520.exeMSBuild.exe

pid process

908 RFQVT-00040520.exe
908 RFQVT-00040520.exe
908 RFQVT-00040520.exe
908 RFQVT-00040520.exe
1936 MSBuild.exe
1936 MSBuild.exe
1936 MSBuild.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

MSBuild.exe

pid process

1936 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

RFQVT-00040520.exeMSBuild.exe

description pid process

Token: SeDebugPrivilege 908 RFQVT-00040520.exe
Token: SeDebugPrivilege 1936 MSBuild.exe

description	pid	process	target process
PID 908 set thread context of 1936	908	RFQVT-00040520.exe	MSBuild.exe

pid	process
636	schtasks.exe

pid	process
908	RFQVT-00040520.exe
908	RFQVT-00040520.exe
908	RFQVT-00040520.exe
908	RFQVT-00040520.exe
1936	MSBuild.exe
1936	MSBuild.exe
1936	MSBuild.exe

pid	process
1936	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	908	RFQVT-00040520.exe
Token: SeDebugPrivilege	1936	MSBuild.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

RFQVT-00040520.exe

description	pid	process	target process
PID 908 wrote to memory of 636	908	RFQVT-00040520.exe	schtasks.exe
PID 908 wrote to memory of 636	908	RFQVT-00040520.exe	schtasks.exe
PID 908 wrote to memory of 636	908	RFQVT-00040520.exe	schtasks.exe
PID 908 wrote to memory of 636	908	RFQVT-00040520.exe	schtasks.exe
PID 908 wrote to memory of 568	908	RFQVT-00040520.exe	MSBuild.exe
PID 908 wrote to memory of 568	908	RFQVT-00040520.exe	MSBuild.exe
PID 908 wrote to memory of 568	908	RFQVT-00040520.exe	MSBuild.exe
PID 908 wrote to memory of 568	908	RFQVT-00040520.exe	MSBuild.exe
PID 908 wrote to memory of 1936	908	RFQVT-00040520.exe	MSBuild.exe
PID 908 wrote to memory of 1936	908	RFQVT-00040520.exe	MSBuild.exe
PID 908 wrote to memory of 1936	908	RFQVT-00040520.exe	MSBuild.exe
PID 908 wrote to memory of 1936	908	RFQVT-00040520.exe	MSBuild.exe
PID 908 wrote to memory of 1936	908	RFQVT-00040520.exe	MSBuild.exe
PID 908 wrote to memory of 1936	908	RFQVT-00040520.exe	MSBuild.exe
PID 908 wrote to memory of 1936	908	RFQVT-00040520.exe	MSBuild.exe
PID 908 wrote to memory of 1936	908	RFQVT-00040520.exe	MSBuild.exe
PID 908 wrote to memory of 1936	908	RFQVT-00040520.exe	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\RFQVT-00040520.exe
"C:\Users\Admin\AppData\Local\Temp\RFQVT-00040520.exe"
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:908

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\NtxeLQox" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3AFF.tmp"
2⤵
- Creates scheduled task(s)
PID:636

C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
"{path}"
2⤵
PID:568

C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
"{path}"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:1936

Network

MITRE ATT&CK Enterprise 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

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp3AFF.tmp

Filesize
1KB

MD5
c48bb0969d6a7644775ff5693f95a6bd

SHA1
f4f42a9b21cfdc8d8da9b8d42bb80aef59c77018

SHA256
35a4b8ab84bbefd5a3a0c7ba8a966fd079bf48b592aecc8e0e01d703fa013f2e

SHA512
e427afa200ac7ae2f16acac1681d84a5b4420acc5699ff297807d3ced7244a0ca409474921f07c1fdf1eb5267b6f4f657c1f80c2c15764af70450bbf1d7d3301

Download Submit
memory/636-56-0x0000000000000000-mapping.dmp

Download
memory/908-54-0x0000000075DE1000-0x0000000075DE3000-memory.dmp

Filesize
8KB

Download
memory/908-55-0x00000000741D0000-0x000000007477B000-memory.dmp

Filesize
5.7MB

Download
memory/1936-61-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1936-59-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1936-58-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1936-62-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1936-64-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1936-65-0x000000000041E792-mapping.dmp

Download
memory/1936-67-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1936-69-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1936-71-0x00000000741D0000-0x000000007477B000-memory.dmp

Filesize
5.7MB

Download
memory/1936-72-0x00000000001F6000-0x0000000000207000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads