nanocore | 41a9ae8ca0a4ff2c58b423a915e55af6de026730f327b727e7f1355456ca26d3

General

Target

BRzRFr8wvpOkE3k.exe
Size

1.0MB
MD5

b0446d93e945e08b0a3eb6b1e2d576ec
SHA1

99e3e554bb1b96dec8bdce995f341a237b08b765
SHA256

41a9ae8ca0a4ff2c58b423a915e55af6de026730f327b727e7f1355456ca26d3
SHA512

d6bebf2e2df557ca5ad51a29907f497eabd75b552e5d02da829e2a5320c3d311085cd4801df18900945053b00c937cfbe82b99767378e6c323d3b099145d593c
SSDEEP

24576:qUHMalofHin7aWy0+y5B7LvuHP8fPw8Slw:tUHS7ByBy5Bc8

Score

10^/10

nanocore evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

194.5.98.156:12094

Mutex

b5a74077-32bc-418d-b7a6-6ac93b76f33f

Attributes

activate_away_mode
true
backup_connection_host
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2022-08-06T22:41:35.918511336Z
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
12094
default_group
UCHE FILE
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
b5a74077-32bc-418d-b7a6-6ac93b76f33f
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
194.5.98.156
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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

BRzRFr8wvpOkE3k.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\DHCP Subsystem = "C:\\Program Files (x86)\\DHCP Subsystem\\dhcpss.exe"	BRzRFr8wvpOkE3k.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

BRzRFr8wvpOkE3k.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA BRzRFr8wvpOkE3k.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

BRzRFr8wvpOkE3k.exe

description pid process target process

PID 3916 set thread context of 5084 3916 BRzRFr8wvpOkE3k.exe BRzRFr8wvpOkE3k.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	BRzRFr8wvpOkE3k.exe

description	pid	process	target process
PID 3916 set thread context of 5084	3916	BRzRFr8wvpOkE3k.exe	BRzRFr8wvpOkE3k.exe

Drops file in Program Files directory 2 IoCs

Processes:

BRzRFr8wvpOkE3k.exe

description	ioc	process
File created	C:\Program Files (x86)\DHCP Subsystem\dhcpss.exe	BRzRFr8wvpOkE3k.exe
File opened for modification	C:\Program Files (x86)\DHCP Subsystem\dhcpss.exe	BRzRFr8wvpOkE3k.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

4660 schtasks.exe
4528 schtasks.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

BRzRFr8wvpOkE3k.exe

pid process

5084 BRzRFr8wvpOkE3k.exe
5084 BRzRFr8wvpOkE3k.exe
5084 BRzRFr8wvpOkE3k.exe
5084 BRzRFr8wvpOkE3k.exe
5084 BRzRFr8wvpOkE3k.exe
5084 BRzRFr8wvpOkE3k.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

BRzRFr8wvpOkE3k.exe

pid process

5084 BRzRFr8wvpOkE3k.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

BRzRFr8wvpOkE3k.exe

description pid process

Token: SeDebugPrivilege 5084 BRzRFr8wvpOkE3k.exe

pid	process
4660	schtasks.exe
4528	schtasks.exe

pid	process
5084	BRzRFr8wvpOkE3k.exe
5084	BRzRFr8wvpOkE3k.exe
5084	BRzRFr8wvpOkE3k.exe
5084	BRzRFr8wvpOkE3k.exe
5084	BRzRFr8wvpOkE3k.exe
5084	BRzRFr8wvpOkE3k.exe

pid	process
5084	BRzRFr8wvpOkE3k.exe

description	pid	process
Token: SeDebugPrivilege	5084	BRzRFr8wvpOkE3k.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

BRzRFr8wvpOkE3k.exeBRzRFr8wvpOkE3k.exe

description	pid	process	target process
PID 3916 wrote to memory of 5084	3916	BRzRFr8wvpOkE3k.exe	BRzRFr8wvpOkE3k.exe
PID 3916 wrote to memory of 5084	3916	BRzRFr8wvpOkE3k.exe	BRzRFr8wvpOkE3k.exe
PID 3916 wrote to memory of 5084	3916	BRzRFr8wvpOkE3k.exe	BRzRFr8wvpOkE3k.exe
PID 3916 wrote to memory of 5084	3916	BRzRFr8wvpOkE3k.exe	BRzRFr8wvpOkE3k.exe
PID 3916 wrote to memory of 5084	3916	BRzRFr8wvpOkE3k.exe	BRzRFr8wvpOkE3k.exe
PID 3916 wrote to memory of 5084	3916	BRzRFr8wvpOkE3k.exe	BRzRFr8wvpOkE3k.exe
PID 3916 wrote to memory of 5084	3916	BRzRFr8wvpOkE3k.exe	BRzRFr8wvpOkE3k.exe
PID 3916 wrote to memory of 5084	3916	BRzRFr8wvpOkE3k.exe	BRzRFr8wvpOkE3k.exe
PID 5084 wrote to memory of 4660	5084	BRzRFr8wvpOkE3k.exe	schtasks.exe
PID 5084 wrote to memory of 4660	5084	BRzRFr8wvpOkE3k.exe	schtasks.exe
PID 5084 wrote to memory of 4660	5084	BRzRFr8wvpOkE3k.exe	schtasks.exe
PID 5084 wrote to memory of 4528	5084	BRzRFr8wvpOkE3k.exe	schtasks.exe
PID 5084 wrote to memory of 4528	5084	BRzRFr8wvpOkE3k.exe	schtasks.exe
PID 5084 wrote to memory of 4528	5084	BRzRFr8wvpOkE3k.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\BRzRFr8wvpOkE3k.exe
"C:\Users\Admin\AppData\Local\Temp\BRzRFr8wvpOkE3k.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3916
- C:\Users\Admin\AppData\Local\Temp\BRzRFr8wvpOkE3k.exe
  "C:\Users\Admin\AppData\Local\Temp\BRzRFr8wvpOkE3k.exe"
  2⤵
  - Adds Run key to start application
  - Checks whether UAC is enabled
  - Drops file in Program Files directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5084
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "DHCP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp9163.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:4660
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "DHCP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp924E.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:4528

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp9163.tmp

Filesize
1KB

MD5
31bece6b032e964e87ed1d5eb4235715

SHA1
86fb4b62c70fbe6583a6e9636e7276f9fe3f34fe

SHA256
089eb8580e043c3bf34729c88f2f5311e502d7b183b0edeebc44e21b0265a818

SHA512
6cb339ac28dfc8d4bd8581f502988a27572088540445d8d0b5750ed61a128907583f75e8b9d5fc2ffa3121e80617173be3038c412f109b234b588741ca54d42c

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp924E.tmp

Filesize
1KB

MD5
2f26d92c1eeead3896820e56ec46f6f1

SHA1
d95533b61eed7d89e4ada56bc566d60e42ac1f61

SHA256
99a158463ce40c750bad6991ae1fceece305a0dbf8e209dd7147b5d539756bfa

SHA512
6c1ed12d5e1afcd9e7f327e0153786fd8594f75a995f341c408ef014e69917452a9fe99c511f0249aceb57b3045b707f1fd3f404e4086cfbf0aadcb3318db892

Download Submit
memory/3916-132-0x0000000000850000-0x000000000095E000-memory.dmp

Filesize
1.1MB

Download
memory/3916-133-0x00000000058F0000-0x0000000005E94000-memory.dmp

Filesize
5.6MB

Download
memory/3916-134-0x0000000005240000-0x00000000052D2000-memory.dmp

Filesize
584KB

Download
memory/3916-135-0x0000000005220000-0x000000000522A000-memory.dmp

Filesize
40KB

Download
memory/3916-136-0x0000000008C60000-0x0000000008CFC000-memory.dmp

Filesize
624KB

Download
memory/4528-141-0x0000000000000000-mapping.dmp

Download
memory/4660-139-0x0000000000000000-mapping.dmp

Download
memory/5084-137-0x0000000000000000-mapping.dmp

Download
memory/5084-138-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/5084-143-0x0000000007290000-0x00000000072F6000-memory.dmp

Filesize
408KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads