nanocore | 7d1ce7961e394f55fb7162e18e6cf587faa463d29ba5976eaad83b409f060621

General

Target

REF_ST73020203576_PDF.exe
Size

727KB
MD5

50620a618761d63b20428dfc609bd570
SHA1

584fb65f5715bd901a5931e320cd6706927ab110
SHA256

7d1ce7961e394f55fb7162e18e6cf587faa463d29ba5976eaad83b409f060621
SHA512

ece785599f8ceac2dc6a753d7777884b9d0992d36127806749714bbd2631339ace4ee8a9bdb21ec4ef50a81120d016915cf1dd368648233633393afb8b89c40d

Score

10^/10

evasion trojan keylogger stealer spyware nanocore persistence

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

194.5.97.91:7583

Mutex

387ab842-769b-4fa2-a1e0-bc2e9b9cdf1a

Attributes

activate_away_mode
false
backup_connection_host
127.0.0.1
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-05-11T08:30:35.976299236Z
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
7583
default_group
ox
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
387ab842-769b-4fa2-a1e0-bc2e9b9cdf1a
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
194.5.97.91
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 behavior: EnumeratesProcesses 9 IoCs

Processes:

REF_ST73020203576_PDF.exeREF_ST73020203576_PDF.exe

pid	process
1496	REF_ST73020203576_PDF.exe
1496	REF_ST73020203576_PDF.exe
1496	REF_ST73020203576_PDF.exe
1496	REF_ST73020203576_PDF.exe
1496	REF_ST73020203576_PDF.exe
1028	REF_ST73020203576_PDF.exe
1028	REF_ST73020203576_PDF.exe
1028	REF_ST73020203576_PDF.exe
1028	REF_ST73020203576_PDF.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

REF_ST73020203576_PDF.exeREF_ST73020203576_PDF.exe

description	pid	process	target process
PID 1496 wrote to memory of 1636	1496	REF_ST73020203576_PDF.exe	REF_ST73020203576_PDF.exe
PID 1496 wrote to memory of 1636	1496	REF_ST73020203576_PDF.exe	REF_ST73020203576_PDF.exe
PID 1496 wrote to memory of 1636	1496	REF_ST73020203576_PDF.exe	REF_ST73020203576_PDF.exe
PID 1496 wrote to memory of 1636	1496	REF_ST73020203576_PDF.exe	REF_ST73020203576_PDF.exe
PID 1496 wrote to memory of 1028	1496	REF_ST73020203576_PDF.exe	REF_ST73020203576_PDF.exe
PID 1496 wrote to memory of 1028	1496	REF_ST73020203576_PDF.exe	REF_ST73020203576_PDF.exe
PID 1496 wrote to memory of 1028	1496	REF_ST73020203576_PDF.exe	REF_ST73020203576_PDF.exe
PID 1496 wrote to memory of 1028	1496	REF_ST73020203576_PDF.exe	REF_ST73020203576_PDF.exe
PID 1496 wrote to memory of 1028	1496	REF_ST73020203576_PDF.exe	REF_ST73020203576_PDF.exe
PID 1496 wrote to memory of 1028	1496	REF_ST73020203576_PDF.exe	REF_ST73020203576_PDF.exe
PID 1496 wrote to memory of 1028	1496	REF_ST73020203576_PDF.exe	REF_ST73020203576_PDF.exe
PID 1496 wrote to memory of 1028	1496	REF_ST73020203576_PDF.exe	REF_ST73020203576_PDF.exe
PID 1496 wrote to memory of 1028	1496	REF_ST73020203576_PDF.exe	REF_ST73020203576_PDF.exe
PID 1028 wrote to memory of 1676	1028	REF_ST73020203576_PDF.exe	schtasks.exe
PID 1028 wrote to memory of 1676	1028	REF_ST73020203576_PDF.exe	schtasks.exe
PID 1028 wrote to memory of 1676	1028	REF_ST73020203576_PDF.exe	schtasks.exe
PID 1028 wrote to memory of 1676	1028	REF_ST73020203576_PDF.exe	schtasks.exe
PID 1028 wrote to memory of 1776	1028	REF_ST73020203576_PDF.exe	schtasks.exe
PID 1028 wrote to memory of 1776	1028	REF_ST73020203576_PDF.exe	schtasks.exe
PID 1028 wrote to memory of 1776	1028	REF_ST73020203576_PDF.exe	schtasks.exe
PID 1028 wrote to memory of 1776	1028	REF_ST73020203576_PDF.exe	schtasks.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

REF_ST73020203576_PDF.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA REF_ST73020203576_PDF.exe
NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
keylogger trojan stealer spyware nanocore

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	REF_ST73020203576_PDF.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

REF_ST73020203576_PDF.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"	REF_ST73020203576_PDF.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

REF_ST73020203576_PDF.exeREF_ST73020203576_PDF.exe

description pid process

Token: SeDebugPrivilege 1496 REF_ST73020203576_PDF.exe
Token: SeDebugPrivilege 1028 REF_ST73020203576_PDF.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

REF_ST73020203576_PDF.exe

description pid process target process

PID 1496 set thread context of 1028 1496 REF_ST73020203576_PDF.exe REF_ST73020203576_PDF.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

REF_ST73020203576_PDF.exe

pid process

1028 REF_ST73020203576_PDF.exe

description	pid	process
Token: SeDebugPrivilege	1496	REF_ST73020203576_PDF.exe
Token: SeDebugPrivilege	1028	REF_ST73020203576_PDF.exe

description	pid	process	target process
PID 1496 set thread context of 1028	1496	REF_ST73020203576_PDF.exe	REF_ST73020203576_PDF.exe

pid	process
1028	REF_ST73020203576_PDF.exe

Drops file in Program Files directory 2 IoCs

Processes:

REF_ST73020203576_PDF.exe

description	ioc	process
File created	C:\Program Files (x86)\WAN Subsystem\wanss.exe	REF_ST73020203576_PDF.exe
File opened for modification	C:\Program Files (x86)\WAN Subsystem\wanss.exe	REF_ST73020203576_PDF.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

1676 schtasks.exe
1776 schtasks.exe

pid	process
1676	schtasks.exe
1776	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\REF_ST73020203576_PDF.exe
"C:\Users\Admin\AppData\Local\Temp\REF_ST73020203576_PDF.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetThreadContext
PID:1496

C:\Users\Admin\AppData\Local\Temp\REF_ST73020203576_PDF.exe
"{path}"
2⤵
PID:1636

C:\Users\Admin\AppData\Local\Temp\REF_ST73020203576_PDF.exe
"{path}"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- Checks whether UAC is enabled
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: GetForegroundWindowSpam
- Drops file in Program Files directory
PID:1028

C:\Windows\SysWOW64\schtasks.exe
"schtasks.exe" /create /f /tn "WAN Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmpA311.tmp"
3⤵
- Creates scheduled task(s)
PID:1676

C:\Windows\SysWOW64\schtasks.exe
"schtasks.exe" /create /f /tn "WAN Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpA44A.tmp"
3⤵
- Creates scheduled task(s)
PID:1776

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpA311.tmp

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpA44A.tmp

Download Submit
memory/1028-4-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1028-5-0x000000000041E792-mapping.dmp

Download
memory/1028-6-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1028-7-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1496-1-0x0000000000000000-0x0000000000000000-disk.dmp

Download
memory/1676-8-0x0000000000000000-mapping.dmp

Download
memory/1776-10-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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