nanocore | b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d

General

Target

b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
Size

1.3MB
MD5

27ff2f504a80e168edda11336c3f306a
SHA1

e28e2c1941d19c85726f5110e0078b6dcae783a0
SHA256

b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d
SHA512

ee6b6ed0a37a05fa9cc92448f5bab047c849673479332bf6a2471004a6c450b4b5260ee9e0da2ca5c9d610ce944f2060fbad5e3a964a3c377c4c14a43d552b8c

Score

10^/10

keylogger trojan stealer spyware nanocore persistence evasion

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

79.134.225.22:7290

Mutex

47d159c4-5098-4adc-b828-b6f8e655b5c4

Attributes

activate_away_mode
true
backup_connection_host
127.0.0.1
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-03-01T13:23:42.048018236Z
bypass_user_account_control
false
bypass_user_account_control_data
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
clear_access_control
false
clear_zone_identifier
false
connect_delay
4000
connection_port
7290
default_group
newkeys
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
47d159c4-5098-4adc-b828-b6f8e655b5c4
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
79.134.225.22
primary_dns_server
8.8.8.8
request_elevation
true
restart_delay
5000
run_delay
0
run_on_startup
false
set_critical_process
true
timeout_interval
5000
use_custom_dns_server
false
version
1.2.2.0
wan_timeout
8000

Signatures

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

MSBuild.exe

description pid process

Token: SeDebugPrivilege 1140 MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	1140	MSBuild.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

Processes:

MSBuild.exeb1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe

pid	process
1140	MSBuild.exe
1140	MSBuild.exe
1140	MSBuild.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe

Drops file in Program Files directory 2 IoCs

Processes:

MSBuild.exe

description	ioc	process
File created	C:\Program Files (x86)\WAN Subsystem\wanss.exe	MSBuild.exe
File opened for modification	C:\Program Files (x86)\WAN Subsystem\wanss.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

Processes:

schtasks.exeschtasks.exe

pid process

1340 schtasks.exe
1552 schtasks.exe

pid	process
1340	schtasks.exe
1552	schtasks.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exeMSBuild.exe

description	pid	process	target process
PID 1104 wrote to memory of 1140	1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe	MSBuild.exe
PID 1104 wrote to memory of 1140	1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe	MSBuild.exe
PID 1104 wrote to memory of 1140	1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe	MSBuild.exe
PID 1104 wrote to memory of 1140	1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe	MSBuild.exe
PID 1104 wrote to memory of 1140	1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe	MSBuild.exe
PID 1104 wrote to memory of 1140	1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe	MSBuild.exe
PID 1140 wrote to memory of 1340	1140	MSBuild.exe	schtasks.exe
PID 1140 wrote to memory of 1340	1140	MSBuild.exe	schtasks.exe
PID 1140 wrote to memory of 1340	1140	MSBuild.exe	schtasks.exe
PID 1140 wrote to memory of 1340	1140	MSBuild.exe	schtasks.exe
PID 1140 wrote to memory of 1552	1140	MSBuild.exe	schtasks.exe
PID 1140 wrote to memory of 1552	1140	MSBuild.exe	schtasks.exe
PID 1140 wrote to memory of 1552	1140	MSBuild.exe	schtasks.exe
PID 1140 wrote to memory of 1552	1140	MSBuild.exe	schtasks.exe

Suspicious use of SendNotifyMessage 3 IoCs

Processes:

b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe

pid	process
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe

description	pid	process	target process
PID 1104 set thread context of 1140	1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe	MSBuild.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

MSBuild.exe

pid process

1140 MSBuild.exe
NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
keylogger trojan stealer spyware nanocore

Adds Run entry to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

MSBuild.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\WAN Subsystem = "C:\\Program Files (x86)\\WAN Subsystem\\wanss.exe"	MSBuild.exe

Drops startup file 1 IoCs

Processes:

b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bootsect.url	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

MSBuild.exe

description ioc process

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

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

Suspicious use of FindShellTrayWindow 3 IoCs

Processes:

b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe

pid	process
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
1104	b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe

C:\Users\Admin\AppData\Local\Temp\b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe
"C:\Users\Admin\AppData\Local\Temp\b1a284146f9726d4cc73aa5bf464ee1fced92c6cef94da053d5ab5c3bc1c658d.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- Suspicious use of SendNotifyMessage
- Suspicious use of SetThreadContext
- Drops startup file
- Suspicious use of FindShellTrayWindow
PID:1104

C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
"C:\\\\Windows\\\\Microsoft.NET\\\\Framework\\\\v2.0.50727\\\\MSBuild.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: EnumeratesProcesses
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
- Suspicious behavior: GetForegroundWindowSpam
- Adds Run entry to start application
- Checks whether UAC is enabled
PID:1140

C:\Windows\SysWOW64\schtasks.exe
"schtasks.exe" /create /f /tn "WAN Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmpFF25.tmp"
3⤵
- Creates scheduled task(s)
PID:1340

C:\Windows\SysWOW64\schtasks.exe
"schtasks.exe" /create /f /tn "WAN Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp20.tmp"
3⤵
- Creates scheduled task(s)
PID:1552

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp20.tmp

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C:\Users\Admin\AppData\Local\Temp\tmpFF25.tmp

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memory/1140-0-0x0000000000080000-0x00000000000B8000-memory.dmp

Filesize
224KB

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memory/1140-1-0x000000000009E792-mapping.dmp

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memory/1140-2-0x0000000000080000-0x00000000000B8000-memory.dmp

Filesize
224KB

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memory/1340-3-0x0000000000000000-mapping.dmp

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memory/1552-5-0x0000000000000000-mapping.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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