nanocore | d445a4a70803fa67062b82091ccd3cc7be00f138692e531bc1ca157ddbd673c6

General

Target
RFQ.gz.exe
Size 1.3MB
Sample201109-rtf31v5fas
SHA256 d445a4a70803fa67062b82091ccd3cc7be00f138692e531bc1ca157ddbd673c6
MD5 0032e8558b0273f34f871919d66c0c92
SHA1 3f0ba74c3df542817e0efd1a2bf091fec547e00b
SHA512 a4d53154e1e55401b440ba734ad57725b4577b8d5eb183b27ad7e34f7e9cb0d1207888b2572f5c2ab9918db651de7d85870b769f596b76d9bde976e6facd8890
MD5 SHA1 SHA512

Score

10^/10

nanocore keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

185.244.29.132:1985
127.0.0.1:1985

Mutex

f61bbd75-d4b8-4ea7-be06-9084282264d7

Attributes

activate_away_mode
true
backup_connection_host
127.0.0.1
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-02-21T01:06:21.461976936Z
bypass_user_account_control
false
bypass_user_account_control_data
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
clear_access_control
true
clear_zone_identifier
false
connect_delay
4000
connection_port
1985
default_group
Scarface
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
f61bbd75-d4b8-4ea7-be06-9084282264d7
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
185.244.29.132
primary_dns_server
8.8.8.8
request_elevation
true
restart_delay
5000
run_delay
0
run_on_startup
false
set_critical_process
false
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

Drops startup file 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\repair-bde.url	RFQ.gz.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\WAN Service = "C:\\Program Files (x86)\\WAN Service\\wansv.exe"	MSBuild.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1144 set thread context of 2976	1144	RFQ.gz.exe	78

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\WAN Service\wansv.exe	MSBuild.exe
File opened for modification	C:\Program Files (x86)\WAN Service\wansv.exe	MSBuild.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
2992	schtasks.exe
3480	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2976	MSBuild.exe
2976	MSBuild.exe
2976	MSBuild.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2976	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2976	MSBuild.exe
Token: SeDebugPrivilege	2976	MSBuild.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
1144	RFQ.gz.exe
1144	RFQ.gz.exe
1144	RFQ.gz.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1144 wrote to memory of 2976	1144	RFQ.gz.exe	78
PID 1144 wrote to memory of 2976	1144	RFQ.gz.exe	78
PID 1144 wrote to memory of 2976	1144	RFQ.gz.exe	78
PID 1144 wrote to memory of 2976	1144	RFQ.gz.exe	78
PID 1144 wrote to memory of 2976	1144	RFQ.gz.exe	78
PID 2976 wrote to memory of 2992	2976	MSBuild.exe	79
PID 2976 wrote to memory of 2992	2976	MSBuild.exe	79
PID 2976 wrote to memory of 2992	2976	MSBuild.exe	79
PID 2976 wrote to memory of 3480	2976	MSBuild.exe	81
PID 2976 wrote to memory of 3480	2976	MSBuild.exe	81
PID 2976 wrote to memory of 3480	2976	MSBuild.exe	81

C:\Users\Admin\AppData\Local\Temp\RFQ.gz.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ.gz.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1144
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
  "C:\\\\Windows\\\\Microsoft.NET\\\\Framework\\\\v2.0.50727\\\\MSBuild.exe"
  2⤵
  - Adds Run key to start application
  - Drops file in Program Files directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2976
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "WAN Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp620B.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:2992
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "WAN Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp62B8.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:3480