nanocore | be240aed297970b0e97f46ce8964784645c8bfeb7b4ffc451ab7857b7df8438f

General

Target

137e5f7335c53e2955e6bb4fc30bebd4.exe
Size

499KB
MD5

137e5f7335c53e2955e6bb4fc30bebd4
SHA1

685e6de70e0eac6012e81125176f85d2fb45c9d4
SHA256

be240aed297970b0e97f46ce8964784645c8bfeb7b4ffc451ab7857b7df8438f
SHA512

5da31f49ac7cfdf695f43d07f4498d2445d579f88cece46abcc357bef8aa14683f590fc03cb9fe5ab19ec7ac233cc3993f87c558f54977a158b8871da6344ad7

Score

10^/10

evasion trojan keylogger stealer spyware nanocore persistence

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

45.77.147.196:24980

ufok.duckdns.org:24980

Mutex

b4474f1d-f922-4f98-b638-5c6cbc8c6590

Attributes

activate_away_mode
true
backup_connection_host
ufok.duckdns.org
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-04-19T16:57:17.983830036Z
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
24980
default_group
men
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
b4474f1d-f922-4f98-b638-5c6cbc8c6590
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
45.77.147.196
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 WriteProcessMemory 21 IoCs

Processes:

137e5f7335c53e2955e6bb4fc30bebd4.exe137e5f7335c53e2955e6bb4fc30bebd4.exe

description	pid	process	target process
PID 864 wrote to memory of 1088	864	137e5f7335c53e2955e6bb4fc30bebd4.exe	schtasks.exe
PID 864 wrote to memory of 1088	864	137e5f7335c53e2955e6bb4fc30bebd4.exe	schtasks.exe
PID 864 wrote to memory of 1088	864	137e5f7335c53e2955e6bb4fc30bebd4.exe	schtasks.exe
PID 864 wrote to memory of 1088	864	137e5f7335c53e2955e6bb4fc30bebd4.exe	schtasks.exe
PID 864 wrote to memory of 1496	864	137e5f7335c53e2955e6bb4fc30bebd4.exe	137e5f7335c53e2955e6bb4fc30bebd4.exe
PID 864 wrote to memory of 1496	864	137e5f7335c53e2955e6bb4fc30bebd4.exe	137e5f7335c53e2955e6bb4fc30bebd4.exe
PID 864 wrote to memory of 1496	864	137e5f7335c53e2955e6bb4fc30bebd4.exe	137e5f7335c53e2955e6bb4fc30bebd4.exe
PID 864 wrote to memory of 1496	864	137e5f7335c53e2955e6bb4fc30bebd4.exe	137e5f7335c53e2955e6bb4fc30bebd4.exe
PID 864 wrote to memory of 1496	864	137e5f7335c53e2955e6bb4fc30bebd4.exe	137e5f7335c53e2955e6bb4fc30bebd4.exe
PID 864 wrote to memory of 1496	864	137e5f7335c53e2955e6bb4fc30bebd4.exe	137e5f7335c53e2955e6bb4fc30bebd4.exe
PID 864 wrote to memory of 1496	864	137e5f7335c53e2955e6bb4fc30bebd4.exe	137e5f7335c53e2955e6bb4fc30bebd4.exe
PID 864 wrote to memory of 1496	864	137e5f7335c53e2955e6bb4fc30bebd4.exe	137e5f7335c53e2955e6bb4fc30bebd4.exe
PID 864 wrote to memory of 1496	864	137e5f7335c53e2955e6bb4fc30bebd4.exe	137e5f7335c53e2955e6bb4fc30bebd4.exe
PID 1496 wrote to memory of 1832	1496	137e5f7335c53e2955e6bb4fc30bebd4.exe	schtasks.exe
PID 1496 wrote to memory of 1832	1496	137e5f7335c53e2955e6bb4fc30bebd4.exe	schtasks.exe
PID 1496 wrote to memory of 1832	1496	137e5f7335c53e2955e6bb4fc30bebd4.exe	schtasks.exe
PID 1496 wrote to memory of 1832	1496	137e5f7335c53e2955e6bb4fc30bebd4.exe	schtasks.exe
PID 1496 wrote to memory of 1364	1496	137e5f7335c53e2955e6bb4fc30bebd4.exe	schtasks.exe
PID 1496 wrote to memory of 1364	1496	137e5f7335c53e2955e6bb4fc30bebd4.exe	schtasks.exe
PID 1496 wrote to memory of 1364	1496	137e5f7335c53e2955e6bb4fc30bebd4.exe	schtasks.exe
PID 1496 wrote to memory of 1364	1496	137e5f7335c53e2955e6bb4fc30bebd4.exe	schtasks.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

137e5f7335c53e2955e6bb4fc30bebd4.exe

description pid process target process

PID 864 set thread context of 1496 864 137e5f7335c53e2955e6bb4fc30bebd4.exe 137e5f7335c53e2955e6bb4fc30bebd4.exe
Creates scheduled task(s) 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exeschtasks.exe

pid process

1832 schtasks.exe
1364 schtasks.exe
1088 schtasks.exe

description	pid	process	target process
PID 864 set thread context of 1496	864	137e5f7335c53e2955e6bb4fc30bebd4.exe	137e5f7335c53e2955e6bb4fc30bebd4.exe

pid	process
1832	schtasks.exe
1364	schtasks.exe
1088	schtasks.exe

Drops file in Program Files directory 2 IoCs

Processes:

137e5f7335c53e2955e6bb4fc30bebd4.exe

description	ioc	process
File created	C:\Program Files (x86)\WAN Subsystem\wanss.exe	137e5f7335c53e2955e6bb4fc30bebd4.exe
File opened for modification	C:\Program Files (x86)\WAN Subsystem\wanss.exe	137e5f7335c53e2955e6bb4fc30bebd4.exe

Adds Run entry to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

137e5f7335c53e2955e6bb4fc30bebd4.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"	137e5f7335c53e2955e6bb4fc30bebd4.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

137e5f7335c53e2955e6bb4fc30bebd4.exe137e5f7335c53e2955e6bb4fc30bebd4.exe

description pid process

Token: SeDebugPrivilege 864 137e5f7335c53e2955e6bb4fc30bebd4.exe
Token: SeDebugPrivilege 1496 137e5f7335c53e2955e6bb4fc30bebd4.exe

description	pid	process
Token: SeDebugPrivilege	864	137e5f7335c53e2955e6bb4fc30bebd4.exe
Token: SeDebugPrivilege	1496	137e5f7335c53e2955e6bb4fc30bebd4.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

137e5f7335c53e2955e6bb4fc30bebd4.exe137e5f7335c53e2955e6bb4fc30bebd4.exe

pid	process
864	137e5f7335c53e2955e6bb4fc30bebd4.exe
1496	137e5f7335c53e2955e6bb4fc30bebd4.exe
1496	137e5f7335c53e2955e6bb4fc30bebd4.exe
1496	137e5f7335c53e2955e6bb4fc30bebd4.exe
1496	137e5f7335c53e2955e6bb4fc30bebd4.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

137e5f7335c53e2955e6bb4fc30bebd4.exe

pid process

1496 137e5f7335c53e2955e6bb4fc30bebd4.exe

pid	process
1496	137e5f7335c53e2955e6bb4fc30bebd4.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

137e5f7335c53e2955e6bb4fc30bebd4.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	137e5f7335c53e2955e6bb4fc30bebd4.exe

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

C:\Users\Admin\AppData\Local\Temp\137e5f7335c53e2955e6bb4fc30bebd4.exe
"C:\Users\Admin\AppData\Local\Temp\137e5f7335c53e2955e6bb4fc30bebd4.exe"
1⤵
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: EnumeratesProcesses
PID:864

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\wriKqTsY" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB402.tmp"
2⤵
- Creates scheduled task(s)
PID:1088

C:\Users\Admin\AppData\Local\Temp\137e5f7335c53e2955e6bb4fc30bebd4.exe
"{path}"
2⤵
- Suspicious use of WriteProcessMemory
- Drops file in Program Files directory
- Adds Run entry to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Checks whether UAC is enabled
PID:1496

C:\Windows\SysWOW64\schtasks.exe
"schtasks.exe" /create /f /tn "WAN Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmpB901.tmp"
3⤵
- Creates scheduled task(s)
PID:1832

C:\Windows\SysWOW64\schtasks.exe
"schtasks.exe" /create /f /tn "WAN Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpB98F.tmp"
3⤵
- Creates scheduled task(s)
PID:1364

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB402.tmp

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C:\Users\Admin\AppData\Local\Temp\tmpB901.tmp

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C:\Users\Admin\AppData\Local\Temp\tmpB98F.tmp

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memory/864-1-0x0000000000000000-0x0000000000000000-disk.dmp

Download
memory/1088-2-0x0000000000000000-mapping.dmp

Download
memory/1364-10-0x0000000000000000-mapping.dmp

Download
memory/1496-4-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1496-5-0x000000000041E792-mapping.dmp

Download
memory/1496-6-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1496-7-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1832-8-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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