nanocore | 88ff1e98dcbd97e019e62abc039b84689c902b602f6b2f6ca2b1094b2643280d

General

Target
aa640f67c221be6fc236d3fb8a75f72e.exe
Size 710KB
Sample210226-yegqkc19cj
SHA256 88ff1e98dcbd97e019e62abc039b84689c902b602f6b2f6ca2b1094b2643280d
MD5 aa640f67c221be6fc236d3fb8a75f72e
SHA1 eb08edf7c0934b0a77c9a0beef2534892b952927
SHA512 2961b0e39c94a3c14e56ebe001b7750260a78e29592d135e84b9cc9d43340a8597a1a4349b1c3f4dbef3f10991449e2f4a53bb063eb11ac235e79b418178d0de
MD5 SHA1 SHA512

Score

10^/10

nanocore evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

strongodss.ddns.net:58103
79.134.225.43:58103

Mutex

572eb7a9-aedf-4b39-8669-f7563dab8a38

Attributes

activate_away_mode
false
backup_connection_host
79.134.225.43
backup_dns_server
buffer_size
65538
build_time
2020-08-31T08:01:57.275180636Z
bypass_user_account_control
false
bypass_user_account_control_data
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
clear_access_control
false
clear_zone_identifier
false
connect_delay
4000
connection_port
58103
default_group
GREAT
enable_debug_mode
true
gc_threshold
1.0485772e+07
keep_alive_timeout
30000
keyboard_logging
false
lan_timeout
2500
max_packet_size
1.0485772e+07
mutex
572eb7a9-aedf-4b39-8669-f7563dab8a38
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
strongodss.ddns.net
primary_dns_server
request_elevation
true
restart_delay
5000
run_delay
0
run_on_startup
false
set_critical_process
false
timeout_interval
5000
use_custom_dns_server
false
version
1.2.2.0
wan_timeout
8009

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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	aa640f67c221be6fc236d3fb8a75f72e.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	aa640f67c221be6fc236d3fb8a75f72e.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	aa640f67c221be6fc236d3fb8a75f72e.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum\0	aa640f67c221be6fc236d3fb8a75f72e.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3116 set thread context of 2632	3116	aa640f67c221be6fc236d3fb8a75f72e.exe	82

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\SMTP Manager\smtpmgr.exe	RegSvcs.exe
File created	C:\Program Files (x86)\SMTP Manager\smtpmgr.exe	RegSvcs.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 3 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
2424	schtasks.exe
1328	schtasks.exe
3692	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3116	aa640f67c221be6fc236d3fb8a75f72e.exe
3116	aa640f67c221be6fc236d3fb8a75f72e.exe
3116	aa640f67c221be6fc236d3fb8a75f72e.exe
2632	RegSvcs.exe
2632	RegSvcs.exe
2632	RegSvcs.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2632	RegSvcs.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3116	aa640f67c221be6fc236d3fb8a75f72e.exe
Token: SeDebugPrivilege	2632	RegSvcs.exe
Token: SeDebugPrivilege	2632	RegSvcs.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3116 wrote to memory of 2424	3116	aa640f67c221be6fc236d3fb8a75f72e.exe	79
PID 3116 wrote to memory of 2424	3116	aa640f67c221be6fc236d3fb8a75f72e.exe	79
PID 3116 wrote to memory of 2424	3116	aa640f67c221be6fc236d3fb8a75f72e.exe	79
PID 3116 wrote to memory of 2560	3116	aa640f67c221be6fc236d3fb8a75f72e.exe	81
PID 3116 wrote to memory of 2560	3116	aa640f67c221be6fc236d3fb8a75f72e.exe	81
PID 3116 wrote to memory of 2560	3116	aa640f67c221be6fc236d3fb8a75f72e.exe	81
PID 3116 wrote to memory of 2632	3116	aa640f67c221be6fc236d3fb8a75f72e.exe	82
PID 3116 wrote to memory of 2632	3116	aa640f67c221be6fc236d3fb8a75f72e.exe	82
PID 3116 wrote to memory of 2632	3116	aa640f67c221be6fc236d3fb8a75f72e.exe	82
PID 3116 wrote to memory of 2632	3116	aa640f67c221be6fc236d3fb8a75f72e.exe	82
PID 3116 wrote to memory of 2632	3116	aa640f67c221be6fc236d3fb8a75f72e.exe	82
PID 3116 wrote to memory of 2632	3116	aa640f67c221be6fc236d3fb8a75f72e.exe	82
PID 3116 wrote to memory of 2632	3116	aa640f67c221be6fc236d3fb8a75f72e.exe	82
PID 3116 wrote to memory of 2632	3116	aa640f67c221be6fc236d3fb8a75f72e.exe	82
PID 2632 wrote to memory of 1328	2632	RegSvcs.exe	83
PID 2632 wrote to memory of 1328	2632	RegSvcs.exe	83
PID 2632 wrote to memory of 1328	2632	RegSvcs.exe	83
PID 2632 wrote to memory of 3692	2632	RegSvcs.exe	85
PID 2632 wrote to memory of 3692	2632	RegSvcs.exe	85
PID 2632 wrote to memory of 3692	2632	RegSvcs.exe	85

C:\Users\Admin\AppData\Local\Temp\aa640f67c221be6fc236d3fb8a75f72e.exe
"C:\Users\Admin\AppData\Local\Temp\aa640f67c221be6fc236d3fb8a75f72e.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:3116
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vRkjjKXkJ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2AD9.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2424
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
  "{path}"
  2⤵
  PID:2560
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
  "{path}"
  2⤵
  - Adds Run key to start application
  - Drops file in Program Files directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2632
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "SMTP Manager" /xml "C:\Users\Admin\AppData\Local\Temp\tmp321D.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:1328
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "SMTP Manager Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp326C.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:3692