nanocore | 4c39d7bc897c365a5c93f4fa958362f6e98d6cbdf8f7dcd9f84aa16caa972855

General

Target

scopat2.1.exe
Size

383KB
MD5

06bb3e6845c05801adc2f8d3d85cd188
SHA1

ef7a48d42513d860bfed62e5fa41efcd79d860c8
SHA256

4c39d7bc897c365a5c93f4fa958362f6e98d6cbdf8f7dcd9f84aa16caa972855
SHA512

c8a6d377ce6a595b55701ed95e375e450a816062c11b46779c9d461792d17953c08af966a35c30c996161af4125344d06c3eb28f1a00ccf0c65dfc103af955ea
SSDEEP

6144:gYa6oyf4GW0T3aXVgMUtBxFPg3leoyr9ZoMCAWEHmim3hEd+SJ5VDEx0psOkqX5V:gY2yfCXVgHfx8l09ZoMdd5msOciN0

Score

10^/10

nanocore evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

crotac.duckdns.org:5050

Mutex

894f04bc-00c2-4900-831f-5a157aa1a453

Attributes

activate_away_mode
true
backup_connection_host
crotac.duckdns.org
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2023-01-03T09:47:24.491959836Z
bypass_user_account_control
true
bypass_user_account_control_data
clear_access_control
true
clear_zone_identifier
false
connect_delay
4000
connection_port
5050
default_group
Ktrl
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
894f04bc-00c2-4900-831f-5a157aa1a453
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
crotac.duckdns.org
primary_dns_server
8.8.8.8
request_elevation
true
restart_delay
5000
run_delay
0
run_on_startup
true
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
Executes dropped EXE 2 IoCs

Processes:

rbkgcwrsj.exerbkgcwrsj.exe

pid process

3984 rbkgcwrsj.exe
1396 rbkgcwrsj.exe

pid	process
3984	rbkgcwrsj.exe
1396	rbkgcwrsj.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

rbkgcwrsj.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\mvrbfotdi = "C:\\Users\\Admin\\AppData\\Roaming\\irwfbkt\\pyunjscxhd.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\rbkgcwrsj.exe\" C:\\Users\\Admin\\AppData\\Loc"	rbkgcwrsj.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

rbkgcwrsj.exe

description ioc process

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

Processes:

rbkgcwrsj.exe

description pid process target process

PID 3984 set thread context of 1396 3984 rbkgcwrsj.exe rbkgcwrsj.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

rbkgcwrsj.exe

pid process

1396 rbkgcwrsj.exe
1396 rbkgcwrsj.exe
1396 rbkgcwrsj.exe
1396 rbkgcwrsj.exe
1396 rbkgcwrsj.exe
1396 rbkgcwrsj.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

rbkgcwrsj.exe

pid process

1396 rbkgcwrsj.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

rbkgcwrsj.exe

pid process

3984 rbkgcwrsj.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

rbkgcwrsj.exe

description pid process

Token: SeDebugPrivilege 1396 rbkgcwrsj.exe

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

description	pid	process	target process
PID 3984 set thread context of 1396	3984	rbkgcwrsj.exe	rbkgcwrsj.exe

pid	process
1396	rbkgcwrsj.exe
1396	rbkgcwrsj.exe
1396	rbkgcwrsj.exe
1396	rbkgcwrsj.exe
1396	rbkgcwrsj.exe
1396	rbkgcwrsj.exe

pid	process
1396	rbkgcwrsj.exe

pid	process
3984	rbkgcwrsj.exe

description	pid	process
Token: SeDebugPrivilege	1396	rbkgcwrsj.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

scopat2.1.exerbkgcwrsj.exe

description	pid	process	target process
PID 1712 wrote to memory of 3984	1712	scopat2.1.exe	rbkgcwrsj.exe
PID 1712 wrote to memory of 3984	1712	scopat2.1.exe	rbkgcwrsj.exe
PID 1712 wrote to memory of 3984	1712	scopat2.1.exe	rbkgcwrsj.exe
PID 3984 wrote to memory of 1396	3984	rbkgcwrsj.exe	rbkgcwrsj.exe
PID 3984 wrote to memory of 1396	3984	rbkgcwrsj.exe	rbkgcwrsj.exe
PID 3984 wrote to memory of 1396	3984	rbkgcwrsj.exe	rbkgcwrsj.exe
PID 3984 wrote to memory of 1396	3984	rbkgcwrsj.exe	rbkgcwrsj.exe

C:\Users\Admin\AppData\Local\Temp\scopat2.1.exe
"C:\Users\Admin\AppData\Local\Temp\scopat2.1.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1712

C:\Users\Admin\AppData\Local\Temp\rbkgcwrsj.exe
"C:\Users\Admin\AppData\Local\Temp\rbkgcwrsj.exe" C:\Users\Admin\AppData\Local\Temp\cevwh.q
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3984

C:\Users\Admin\AppData\Local\Temp\rbkgcwrsj.exe
"C:\Users\Admin\AppData\Local\Temp\rbkgcwrsj.exe"
3⤵
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:1396

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

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\cevwh.q
Filesize
7KB

MD5
b465ac093e35689025f05617de27d4ed

SHA1
9c41ce7fa4c3f2f8bf13af596b67e6d6632eb56b

SHA256
938b55cd4f0f1ecc7bfc453dde7c50e8ca3866d353a2ef59f096b89ead4df526

SHA512
483c04db189887dd4f15a2475134bc8cc26bc796109d11c2c6438402907356fee0eb5d5a00aa89f80d12fb16cae24800d25c3612f234216bdcb3cf6bd8c5fcc6

Download Submit
C:\Users\Admin\AppData\Local\Temp\gbmdamjfoka.fzc
Filesize
300KB

MD5
76e16fb10a3d83792149d8c9393f7668

SHA1
bc083609e37038ea9bc815fda40d8354a43b697c

SHA256
7c47fc3155654a131846e93a6bc2bd4bfff07f49964822b4de4351b54be36c30

SHA512
3adc35f415bd55fb6937164108063f3c758d0a5ff1342774d5cad571f207d1a88f78e7494742e3565c93bd2ec12d3121f719515e2e3fa54644d27a3dea9bd21c

Download Submit
C:\Users\Admin\AppData\Local\Temp\rbkgcwrsj.exe
Filesize
85KB

MD5
89eef5fbc05a4aa8d9e1f256e2017cf6

SHA1
cdd713022563ee28195ed9e9e4a662db1c4addba

SHA256
00518f678a34ace7aa6d756b991f9b6d6f9fce96abd1ebf0e01ef2775b06a93c

SHA512
19c8cd1c4d9e26788e96942a23640245bdfa794c6e2e80dab9eb0c050fdc0983ca611943cfc0c7b4a2f7c23c79e26962e0aa1a2c801841f7d0e8b9a4acdd599a

Download Submit
C:\Users\Admin\AppData\Local\Temp\rbkgcwrsj.exe
Filesize
85KB

MD5
89eef5fbc05a4aa8d9e1f256e2017cf6

SHA1
cdd713022563ee28195ed9e9e4a662db1c4addba

SHA256
00518f678a34ace7aa6d756b991f9b6d6f9fce96abd1ebf0e01ef2775b06a93c

SHA512
19c8cd1c4d9e26788e96942a23640245bdfa794c6e2e80dab9eb0c050fdc0983ca611943cfc0c7b4a2f7c23c79e26962e0aa1a2c801841f7d0e8b9a4acdd599a

Download Submit
C:\Users\Admin\AppData\Local\Temp\rbkgcwrsj.exe
Filesize
85KB

MD5
89eef5fbc05a4aa8d9e1f256e2017cf6

SHA1
cdd713022563ee28195ed9e9e4a662db1c4addba

SHA256
00518f678a34ace7aa6d756b991f9b6d6f9fce96abd1ebf0e01ef2775b06a93c

SHA512
19c8cd1c4d9e26788e96942a23640245bdfa794c6e2e80dab9eb0c050fdc0983ca611943cfc0c7b4a2f7c23c79e26962e0aa1a2c801841f7d0e8b9a4acdd599a

Download Submit
memory/1396-149-0x0000000002120000-0x0000000002130000-memory.dmp

Filesize
64KB

Download
memory/1396-152-0x0000000002120000-0x0000000002130000-memory.dmp

Filesize
64KB

Download
memory/1396-143-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/1396-146-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/1396-148-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/1396-160-0x0000000002120000-0x0000000002130000-memory.dmp

Filesize
64KB

Download
memory/1396-151-0x0000000002120000-0x0000000002130000-memory.dmp

Filesize
64KB

Download
memory/1396-145-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/1396-153-0x0000000002120000-0x0000000002130000-memory.dmp

Filesize
64KB

Download
memory/1396-154-0x0000000002120000-0x0000000002130000-memory.dmp

Filesize
64KB

Download
memory/1396-156-0x0000000002120000-0x0000000002130000-memory.dmp

Filesize
64KB

Download
memory/1396-157-0x0000000002120000-0x0000000002130000-memory.dmp

Filesize
64KB

Download
memory/1396-159-0x0000000002120000-0x0000000002130000-memory.dmp

Filesize
64KB

Download
memory/1396-158-0x0000000002120000-0x0000000002130000-memory.dmp

Filesize
64KB

Download
memory/3984-140-0x00000000005F0000-0x00000000005F2000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing