nanocore | bfdf80276b2b7b988a742e3b04b36dcaf35db1d83c386f2e8a862cbccd38b6e6

General

Target

DOCS-0439439-45939943-349543-430-PDF.exe
Size

847KB
MD5

30eb668bbc6eae06f6282a6a3d7a1aec
SHA1

2e8e768880d5bf150138f98d2af3d0dab086ce2c
SHA256

32dc7221db0e7b9c6a51eeff7e9d5aab76e9c787c7905c08879b10ec4bfe2968
SHA512

fd5b359bf14dc56f3805bbdcb7c9ebf738fc35eed6d333ebcf263479a59a518ffd729be3d9e14ea92c0923f54db955cf5b9888caeebd9ef31dd354a6e2472b9d
SSDEEP

12288:gYV6MorX7qzuC3QHO9FQVHPF51jgcIhHZV7Ozjr1CqN88wx5gLKnc1Qyqr4pl:/BXu9HGaVHIdZV7Ozn988a5eKco4pl

Score

10^/10

nanocore discovery keylogger persistence spyware stealer trojan upx

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

yes.dnsabr.com:54984

Mutex

0d98a690-f5c9-413d-9215-84bcef0238ef

Attributes

activate_away_mode
true
backup_connection_host
yes.dnsabr.com
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2019-02-18T10:20:04.432974736Z
bypass_user_account_control
true
bypass_user_account_control_data
clear_access_control
true
clear_zone_identifier
true
connect_delay
4000
connection_port
54984
default_group
YESMA
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
0d98a690-f5c9-413d-9215-84bcef0238ef
mutex_timeout
5000
prevent_system_sleep
true
primary_connection_host
yes.dnsabr.com
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

Drops startup file 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\browcli.url	DOCS-0439439-45939943-349543-430-PDF.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/812-0-0x0000000000800000-0x00000000009D3000-memory.dmp	upx
behavioral2/memory/812-13-0x0000000000800000-0x00000000009D3000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\WPA Monitor = "C:\\Program Files (x86)\\WPA Monitor\\wpamon.exe"	RegSvcs.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/812-13-0x0000000000800000-0x00000000009D3000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 812 set thread context of 2984	812	DOCS-0439439-45939943-349543-430-PDF.exe	93

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\WPA Monitor\wpamon.exe	RegSvcs.exe
File opened for modification	C:\Program Files (x86)\WPA Monitor\wpamon.exe	RegSvcs.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DOCS-0439439-45939943-349543-430-PDF.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2984	RegSvcs.exe
2984	RegSvcs.exe
2984	RegSvcs.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2984	RegSvcs.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2984	RegSvcs.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
812	DOCS-0439439-45939943-349543-430-PDF.exe
812	DOCS-0439439-45939943-349543-430-PDF.exe
812	DOCS-0439439-45939943-349543-430-PDF.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
812	DOCS-0439439-45939943-349543-430-PDF.exe
812	DOCS-0439439-45939943-349543-430-PDF.exe
812	DOCS-0439439-45939943-349543-430-PDF.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 812 wrote to memory of 2984	812	DOCS-0439439-45939943-349543-430-PDF.exe	93
PID 812 wrote to memory of 2984	812	DOCS-0439439-45939943-349543-430-PDF.exe	93
PID 812 wrote to memory of 2984	812	DOCS-0439439-45939943-349543-430-PDF.exe	93
PID 812 wrote to memory of 2984	812	DOCS-0439439-45939943-349543-430-PDF.exe	93
PID 812 wrote to memory of 2984	812	DOCS-0439439-45939943-349543-430-PDF.exe	93

C:\Users\Admin\AppData\Local\Temp\DOCS-0439439-45939943-349543-430-PDF.exe
"C:\Users\Admin\AppData\Local\Temp\DOCS-0439439-45939943-349543-430-PDF.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:812
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"
  2⤵
  - Adds Run key to start application
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  PID:2984

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4208,i,6510295916244954942,10164894160290787457,262144 --variations-seed-version --mojo-platform-channel-handle=3824 /prefetch:8
1⤵
PID:3484

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/812-0-0x0000000000800000-0x00000000009D3000-memory.dmp

Filesize
1.8MB

Download
memory/812-6-0x0000000001090000-0x0000000001091000-memory.dmp

Filesize
4KB

Download
memory/812-13-0x0000000000800000-0x00000000009D3000-memory.dmp

Filesize
1.8MB

Download
memory/2984-7-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2984-14-0x00000000744B2000-0x00000000744B3000-memory.dmp

Filesize
4KB

Download
memory/2984-15-0x00000000744B0000-0x0000000074A61000-memory.dmp

Filesize
5.7MB

Download
memory/2984-16-0x00000000744B0000-0x0000000074A61000-memory.dmp

Filesize
5.7MB

Download
memory/2984-19-0x00000000744B0000-0x0000000074A61000-memory.dmp

Filesize
5.7MB

Download
memory/2984-20-0x00000000744B2000-0x00000000744B3000-memory.dmp

Filesize
4KB

Download
memory/2984-21-0x00000000744B0000-0x0000000074A61000-memory.dmp

Filesize
5.7MB

Download
memory/2984-22-0x00000000744B0000-0x0000000074A61000-memory.dmp

Filesize
5.7MB

Download
memory/2984-23-0x00000000744B0000-0x0000000074A61000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads