nanocore | dd02cb85d94d9d687d5de330f198abd8f1a84720947c03dfad880526830986f3

General

Target

ZtwPj90AM5uNjVx.exe
Size

390KB
MD5

4c05e57f9047e2206f9e1d168fa06481
SHA1

6346ac10485dfb99bbf1a2570d306feacda3f7ba
SHA256

dd02cb85d94d9d687d5de330f198abd8f1a84720947c03dfad880526830986f3
SHA512

3f09c8173095b5fff64a43b0ba8259d9f358a27b55ab6fec637d93683f7abfb949edf89937481d3b15920329b1e41f34544203cc22976da6f6dc3334935a43fd

Score

10^/10

evasion trojan keylogger stealer spyware nanocore persistence

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

91.193.75.58:1985

Mutex

596c2bb9-90b7-4362-af9a-082627ebed15

Attributes

activate_away_mode
true
backup_connection_host
127.0.0.1
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-03-30T21:40:30.911959536Z
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
official
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
596c2bb9-90b7-4362-af9a-082627ebed15
mutex_timeout
5000
prevent_system_sleep
true
primary_connection_host
91.193.75.58
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

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

740 schtasks.exe

pid	process
740	schtasks.exe

Adds Run entry to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

RegSvcs.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"	RegSvcs.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

ZtwPj90AM5uNjVx.exe

description	pid	process	target process
PID 1496 wrote to memory of 740	1496	ZtwPj90AM5uNjVx.exe	schtasks.exe
PID 1496 wrote to memory of 740	1496	ZtwPj90AM5uNjVx.exe	schtasks.exe
PID 1496 wrote to memory of 740	1496	ZtwPj90AM5uNjVx.exe	schtasks.exe
PID 1496 wrote to memory of 740	1496	ZtwPj90AM5uNjVx.exe	schtasks.exe
PID 1496 wrote to memory of 732	1496	ZtwPj90AM5uNjVx.exe	RegSvcs.exe
PID 1496 wrote to memory of 732	1496	ZtwPj90AM5uNjVx.exe	RegSvcs.exe
PID 1496 wrote to memory of 732	1496	ZtwPj90AM5uNjVx.exe	RegSvcs.exe
PID 1496 wrote to memory of 732	1496	ZtwPj90AM5uNjVx.exe	RegSvcs.exe
PID 1496 wrote to memory of 732	1496	ZtwPj90AM5uNjVx.exe	RegSvcs.exe
PID 1496 wrote to memory of 732	1496	ZtwPj90AM5uNjVx.exe	RegSvcs.exe
PID 1496 wrote to memory of 732	1496	ZtwPj90AM5uNjVx.exe	RegSvcs.exe
PID 1496 wrote to memory of 732	1496	ZtwPj90AM5uNjVx.exe	RegSvcs.exe
PID 1496 wrote to memory of 732	1496	ZtwPj90AM5uNjVx.exe	RegSvcs.exe
PID 1496 wrote to memory of 732	1496	ZtwPj90AM5uNjVx.exe	RegSvcs.exe
PID 1496 wrote to memory of 732	1496	ZtwPj90AM5uNjVx.exe	RegSvcs.exe
PID 1496 wrote to memory of 732	1496	ZtwPj90AM5uNjVx.exe	RegSvcs.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

ZtwPj90AM5uNjVx.exe

description pid process target process

PID 1496 set thread context of 732 1496 ZtwPj90AM5uNjVx.exe RegSvcs.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegSvcs.exe

description pid process

Token: SeDebugPrivilege 732 RegSvcs.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

RegSvcs.exe

pid process

732 RegSvcs.exe
732 RegSvcs.exe
732 RegSvcs.exe
732 RegSvcs.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

RegSvcs.exe

pid process

732 RegSvcs.exe
Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

RegSvcs.exe

description ioc process

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

description	pid	process	target process
PID 1496 set thread context of 732	1496	ZtwPj90AM5uNjVx.exe	RegSvcs.exe

description	pid	process
Token: SeDebugPrivilege	732	RegSvcs.exe

pid	process
732	RegSvcs.exe
732	RegSvcs.exe
732	RegSvcs.exe
732	RegSvcs.exe

pid	process
732	RegSvcs.exe

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

Drops file in Program Files directory 2 IoCs

Processes:

RegSvcs.exe

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

C:\Users\Admin\AppData\Local\Temp\ZtwPj90AM5uNjVx.exe
"C:\Users\Admin\AppData\Local\Temp\ZtwPj90AM5uNjVx.exe"
1⤵
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
PID:1496

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\EmEIYFCwLYSPp" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9B54.tmp"
2⤵
- Creates scheduled task(s)
PID:740

C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
"{path}"
2⤵
- Adds Run entry to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Checks whether UAC is enabled
- Drops file in Program Files directory
PID:732

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\tmp9B54.tmp

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memory/732-2-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/732-3-0x000000000041E792-mapping.dmp

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memory/732-4-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/732-5-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/740-0-0x0000000000000000-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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