nanocore | 1c2fafc2031b76ab4caf3f91474f023321703a820209da4591192b6ca7cd09d2

General

Target

PO 88971111.exe
Size

1.3MB
MD5

1ba1a3553123eb90a47a26df297a2f59
SHA1

6fc2f0f2ff1672fc79295c835bc3091c1e99b6e2
SHA256

1c2fafc2031b76ab4caf3f91474f023321703a820209da4591192b6ca7cd09d2
SHA512

0eb35918391112a0e8b3f0dbfd4a4bbf832c2c564ace73212241c71f9a8d42233abb2687261885c4a57db3f93ff60260b7712752e3a4a7313dbc7e1ef9bd54fe

Score

10^/10

persistence evasion trojan keylogger stealer spyware nanocore

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

185.140.53.12:1985

Mutex

76b99e5b-25c3-4464-b518-9c818a6b16d3

Attributes

activate_away_mode
true
backup_connection_host
127.0.0.1
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-03-16T15:41:37.080532036Z
bypass_user_account_control
true
bypass_user_account_control_data
clear_access_control
false
clear_zone_identifier
false
connect_delay
4000
connection_port
1985
default_group
kdott
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
76b99e5b-25c3-4464-b518-9c818a6b16d3
mutex_timeout
5000
prevent_system_sleep
true
primary_connection_host
185.140.53.12
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 SetThreadContext 1 IoCs

Processes:

PO 88971111.exe

description pid process target process

PID 1496 set thread context of 1796 1496 PO 88971111.exe MSBuild.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

MSBuild.exe

description pid process

Token: SeDebugPrivilege 1796 MSBuild.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

MSBuild.exe

pid process

1796 MSBuild.exe

description	pid	process	target process
PID 1496 set thread context of 1796	1496	PO 88971111.exe	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	1796	MSBuild.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

NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
keylogger trojan stealer spyware nanocore
Suspicious use of FindShellTrayWindow 3 IoCs

Processes:

PO 88971111.exe

pid process

1496 PO 88971111.exe
1496 PO 88971111.exe
1496 PO 88971111.exe
Suspicious use of SendNotifyMessage 3 IoCs

Processes:

PO 88971111.exe

pid process

1496 PO 88971111.exe
1496 PO 88971111.exe
1496 PO 88971111.exe

pid	process
1496	PO 88971111.exe
1496	PO 88971111.exe
1496	PO 88971111.exe

pid	process
1496	PO 88971111.exe
1496	PO 88971111.exe
1496	PO 88971111.exe

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:

PO 88971111.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tabcal.url	PO 88971111.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 WriteProcessMemory 6 IoCs

Processes:

PO 88971111.exe

description	pid	process	target process
PID 1496 wrote to memory of 1796	1496	PO 88971111.exe	MSBuild.exe
PID 1496 wrote to memory of 1796	1496	PO 88971111.exe	MSBuild.exe
PID 1496 wrote to memory of 1796	1496	PO 88971111.exe	MSBuild.exe
PID 1496 wrote to memory of 1796	1496	PO 88971111.exe	MSBuild.exe
PID 1496 wrote to memory of 1796	1496	PO 88971111.exe	MSBuild.exe
PID 1496 wrote to memory of 1796	1496	PO 88971111.exe	MSBuild.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

Processes:

MSBuild.exePO 88971111.exe

pid	process
1796	MSBuild.exe
1796	MSBuild.exe
1496	PO 88971111.exe
1496	PO 88971111.exe
1496	PO 88971111.exe
1496	PO 88971111.exe
1496	PO 88971111.exe
1496	PO 88971111.exe
1496	PO 88971111.exe
1496	PO 88971111.exe
1496	PO 88971111.exe
1496	PO 88971111.exe
1496	PO 88971111.exe
1496	PO 88971111.exe
1496	PO 88971111.exe

C:\Users\Admin\AppData\Local\Temp\PO 88971111.exe
"C:\Users\Admin\AppData\Local\Temp\PO 88971111.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Drops startup file
- Suspicious use of WriteProcessMemory
- Suspicious behavior: EnumeratesProcesses
PID:1496

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: GetForegroundWindowSpam
- Drops file in Program Files directory
- Adds Run entry to start application
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
PID:1796

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

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

memory/1796-0-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1796-1-0x000000000041E792-mapping.dmp

Download
memory/1796-2-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads