nanocore | 5b0eb5664dc373aa5e2c59229bb23e88d02b04f8054cd04a37bf218c4692aada

General

Target

PDF.exe
Size

356KB
MD5

a545c585fdb84c6e92484da233292e25
SHA1

b491d5687f2ae3c16ee329b9b7d83255787d5d65
SHA256

b4a60a5fdddebf1351aa77b5ae1b850c8f53312cbe7e3792a0adbd3a458c70ba
SHA512

f9ce5c7b1901fda942843fe72af17885a46cb9acf59783b14d6df5a315dab09db0a50c215f16c627120284398e037549793a5d2a277ac1319965206875f8bb85

Score

10^/10

nanocore evasion keylogger spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

172.111.188.199:8829

Mutex

ce1d7a43-a4b9-4511-9ddf-1134841f2535

Attributes

activate_away_mode
true
backup_connection_host
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-02-02T10:25:40.952250336Z
bypass_user_account_control
true
bypass_user_account_control_data
clear_access_control
true
clear_zone_identifier
false
connect_delay
4000
connection_port
8829
default_group
Billi
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
ce1d7a43-a4b9-4511-9ddf-1134841f2535
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
172.111.188.199
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
Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

PDF.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	PDF.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	PDF.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

PDF.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA PDF.exe

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

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

PDF.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	PDF.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	PDF.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

PDF.exe

description pid process target process

PID 1828 set thread context of 1548 1828 PDF.exe PDF.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

1608 schtasks.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

PDF.exePDF.exe

pid process

1828 PDF.exe
1548 PDF.exe
1548 PDF.exe
1548 PDF.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

PDF.exe

pid process

1548 PDF.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

PDF.exePDF.exe

description pid process

Token: SeDebugPrivilege 1828 PDF.exe
Token: SeDebugPrivilege 1548 PDF.exe

description	pid	process	target process
PID 1828 set thread context of 1548	1828	PDF.exe	PDF.exe

pid	process
1608	schtasks.exe

pid	process
1828	PDF.exe
1548	PDF.exe
1548	PDF.exe
1548	PDF.exe

pid	process
1548	PDF.exe

description	pid	process
Token: SeDebugPrivilege	1828	PDF.exe
Token: SeDebugPrivilege	1548	PDF.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

PDF.exe

description	pid	process	target process
PID 1828 wrote to memory of 1608	1828	PDF.exe	schtasks.exe
PID 1828 wrote to memory of 1608	1828	PDF.exe	schtasks.exe
PID 1828 wrote to memory of 1608	1828	PDF.exe	schtasks.exe
PID 1828 wrote to memory of 1608	1828	PDF.exe	schtasks.exe
PID 1828 wrote to memory of 1548	1828	PDF.exe	PDF.exe
PID 1828 wrote to memory of 1548	1828	PDF.exe	PDF.exe
PID 1828 wrote to memory of 1548	1828	PDF.exe	PDF.exe
PID 1828 wrote to memory of 1548	1828	PDF.exe	PDF.exe
PID 1828 wrote to memory of 1548	1828	PDF.exe	PDF.exe
PID 1828 wrote to memory of 1548	1828	PDF.exe	PDF.exe
PID 1828 wrote to memory of 1548	1828	PDF.exe	PDF.exe
PID 1828 wrote to memory of 1548	1828	PDF.exe	PDF.exe
PID 1828 wrote to memory of 1548	1828	PDF.exe	PDF.exe

C:\Users\Admin\AppData\Local\Temp\PDF.exe
"C:\Users\Admin\AppData\Local\Temp\PDF.exe"
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1828

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YuhOvQLEAEK" /XML "C:\Users\Admin\AppData\Local\Temp\tmp11EC.tmp"
2⤵
- Creates scheduled task(s)
PID:1608

C:\Users\Admin\AppData\Local\Temp\PDF.exe
"{path}"
2⤵
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:1548

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Query Registry

4

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

4

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp11EC.tmp
Filesize
1KB

MD5
a5242111d2f9b67fd03b14320a5b9bfa

SHA1
4a0f701bce19c3515c2f4d8a333057e429f122fb

SHA256
146c7448ba6f5fe228d3802382ef0bdae156853c8e295a74133458947f6ad61b

SHA512
4b836fd48cce244c35e8bfbb2236058165bc7ef549d78c3c3f0e86c02c068e7f148ed3349f54811600a729db7d3449775f53cd5c25dcae952ff51efa91f31ffb

Download Submit
memory/1548-62-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1548-58-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1548-61-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1548-59-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1548-64-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1548-65-0x000000000041E792-mapping.dmp

Download
memory/1548-67-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1548-69-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1548-71-0x0000000074C00000-0x00000000751AB000-memory.dmp

Filesize
5.7MB

Download
memory/1608-56-0x0000000000000000-mapping.dmp

Download
memory/1828-55-0x0000000074C00000-0x00000000751AB000-memory.dmp

Filesize
5.7MB

Download
memory/1828-54-0x0000000075741000-0x0000000075743000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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