nanocore | 81630e871a0be893df07958d294ceda64577f410d372e56040a507ed089cc79a

General

Target

TBA.exe
Size

492KB
MD5

a8cd86a7698875d1eba6a5b03d24e61b
SHA1

3de1fbe8198880e2005b7e7d26e288d068165acd
SHA256

b3fd83d19a65a806d17f9c5245b94d7499e711f56814a2d1fe4ae62474315781
SHA512

dc29909c2602b7f97cb828c1f8f54d8fd0e8fb8c2e29aed94c7811ac03169853ab379b106c2883280b87243e4261df4f999d055f9326878728ab37d2680a6514

Score

10^/10

nanocore keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

isiefi.ddns.net:9909

Mutex

1c87c2a2-27a9-4062-b41f-749df56c3f54

Attributes

activate_away_mode
true
backup_connection_host
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-03-28T18:27:52.322706536Z
bypass_user_account_control
true
bypass_user_account_control_data
clear_access_control
true
clear_zone_identifier
false
connect_delay
4000
connection_port
9909
default_group
latest
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
1c87c2a2-27a9-4062-b41f-749df56c3f54
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
isiefi.ddns.net
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

NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
keylogger trojan stealer spyware nanocore
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

TBA.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation TBA.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	TBA.exe

Adds Run key 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\WPA Service = "C:\\Program Files (x86)\\WPA Service\\wpasv.exe"	MSBuild.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

TBA.exe

description pid process target process

PID 2364 set thread context of 2568 2364 TBA.exe MSBuild.exe

description	pid	process	target process
PID 2364 set thread context of 2568	2364	TBA.exe	MSBuild.exe

Drops file in Program Files directory 2 IoCs

Processes:

MSBuild.exe

description	ioc	process
File created	C:\Program Files (x86)\WPA Service\wpasv.exe	MSBuild.exe
File opened for modification	C:\Program Files (x86)\WPA Service\wpasv.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

2404 schtasks.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

TBA.exeMSBuild.exe

pid process

2364 TBA.exe
2568 MSBuild.exe
2568 MSBuild.exe
2568 MSBuild.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

MSBuild.exe

pid process

2568 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

TBA.exeMSBuild.exe

description pid process

Token: SeDebugPrivilege 2364 TBA.exe
Token: SeDebugPrivilege 2568 MSBuild.exe

pid	process
2404	schtasks.exe

pid	process
2364	TBA.exe
2568	MSBuild.exe
2568	MSBuild.exe
2568	MSBuild.exe

pid	process
2568	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	2364	TBA.exe
Token: SeDebugPrivilege	2568	MSBuild.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

TBA.exe

description	pid	process	target process
PID 2364 wrote to memory of 2404	2364	TBA.exe	schtasks.exe
PID 2364 wrote to memory of 2404	2364	TBA.exe	schtasks.exe
PID 2364 wrote to memory of 2404	2364	TBA.exe	schtasks.exe
PID 2364 wrote to memory of 2568	2364	TBA.exe	MSBuild.exe
PID 2364 wrote to memory of 2568	2364	TBA.exe	MSBuild.exe
PID 2364 wrote to memory of 2568	2364	TBA.exe	MSBuild.exe
PID 2364 wrote to memory of 2568	2364	TBA.exe	MSBuild.exe
PID 2364 wrote to memory of 2568	2364	TBA.exe	MSBuild.exe
PID 2364 wrote to memory of 2568	2364	TBA.exe	MSBuild.exe
PID 2364 wrote to memory of 2568	2364	TBA.exe	MSBuild.exe
PID 2364 wrote to memory of 2568	2364	TBA.exe	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\TBA.exe
"C:\Users\Admin\AppData\Local\Temp\TBA.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2364

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\sBjJNTRC" /XML "C:\Users\Admin\AppData\Local\Temp\tmp89EC.tmp"
2⤵
- Creates scheduled task(s)
PID:2404

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
"{path}"
2⤵
- Adds Run key to start application
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:2568

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp89EC.tmp
Filesize
1KB

MD5
23bd020f9b17c0f3fbaaffe0d187bc59

SHA1
979da6c35c9e63f7875253dd58444d5f246b4c1e

SHA256
09b3676ec6f17345e2679ca50ce0c90eadbc8e1969b6bbfcb911294261b971dd

SHA512
12a5554bdf4a03388080258a20d8e783de71d42581c4b19737724b27036ee8de23eea0a6c31bf03878f88fce478d723486d4574fced1350ea585c4da02cd05e4

Download Submit
memory/2364-130-0x0000000000A70000-0x0000000000AF2000-memory.dmp

Filesize
520KB

Download
memory/2364-131-0x0000000005A80000-0x0000000006024000-memory.dmp

Filesize
5.6MB

Download
memory/2364-132-0x00000000054D0000-0x0000000005562000-memory.dmp

Filesize
584KB

Download
memory/2364-133-0x0000000006030000-0x00000000061B6000-memory.dmp

Filesize
1.5MB

Download
memory/2364-134-0x0000000005970000-0x0000000005A0C000-memory.dmp

Filesize
624KB

Download
memory/2404-135-0x0000000000000000-mapping.dmp

Download
memory/2568-137-0x0000000000000000-mapping.dmp

Download
memory/2568-138-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2568-139-0x0000000004E50000-0x0000000004E5A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads