nanocore | d8aa80e0e277ebdd9220fbd4dab321ba6d98610969d8c4e07f398c0d85bdf0ac

Analysis

max time kernel
120s
max time network
148s
platform
windows7_x64
resource
win7-en-20211014
submitted
22/11/2021, 02:56

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General

Target
EG04nNoRGNcLmvP.exe
Size 748KB
Sample211122-de2f4segar
SHA256 d8aa80e0e277ebdd9220fbd4dab321ba6d98610969d8c4e07f398c0d85bdf0ac
MD5 f2b2638ff479744da9d68e13d24267d9
SHA1 155c8b49e488f2cdbac988a5233253b409ff5af5
SHA512 a57eec6ac50afb41737eb9398402be3c8475f238ccd7d6f678681a59dfb21faea1e327f3d66efcba71ce01d0428819dd6a049b2e54f6f43b16b602d7232cdc90
MD5 SHA1 SHA512

Score

10^/10

nanocore evasion keylogger persistence spyware stealer suricata trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

ebuka19.ddns.net:1416

Mutex

ab4539e1-c4e8-43c4-87a8-8c37fdcc50c4

Attributes

activate_away_mode
true
backup_connection_host
ebuka19.ddns.net
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2021-08-28T08:38:41.817173036Z
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
1416
default_group
Ebuka
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
ab4539e1-c4e8-43c4-87a8-8c37fdcc50c4
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
ebuka19.ddns.net
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
suricata: ET MALWARE Possible NanoCore C2 60B
suricata: ET MALWARE Possible NanoCore C2 60B
suricata

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 Service = "C:\\Program Files (x86)\\SMTP Service\\smtpsvc.exe"	EG04nNoRGNcLmvP.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	EG04nNoRGNcLmvP.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1624 set thread context of 836	1624	EG04nNoRGNcLmvP.exe	28

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\SMTP Service\smtpsvc.exe	EG04nNoRGNcLmvP.exe
File opened for modification	C:\Program Files (x86)\SMTP Service\smtpsvc.exe	EG04nNoRGNcLmvP.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

pid	Process
1100	schtasks.exe
1808	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
836	EG04nNoRGNcLmvP.exe
836	EG04nNoRGNcLmvP.exe
836	EG04nNoRGNcLmvP.exe
836	EG04nNoRGNcLmvP.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
836	EG04nNoRGNcLmvP.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	836	EG04nNoRGNcLmvP.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1624 wrote to memory of 836	1624	EG04nNoRGNcLmvP.exe	28
PID 1624 wrote to memory of 836	1624	EG04nNoRGNcLmvP.exe	28
PID 1624 wrote to memory of 836	1624	EG04nNoRGNcLmvP.exe	28
PID 1624 wrote to memory of 836	1624	EG04nNoRGNcLmvP.exe	28
PID 1624 wrote to memory of 836	1624	EG04nNoRGNcLmvP.exe	28
PID 1624 wrote to memory of 836	1624	EG04nNoRGNcLmvP.exe	28
PID 1624 wrote to memory of 836	1624	EG04nNoRGNcLmvP.exe	28
PID 1624 wrote to memory of 836	1624	EG04nNoRGNcLmvP.exe	28
PID 1624 wrote to memory of 836	1624	EG04nNoRGNcLmvP.exe	28
PID 836 wrote to memory of 1808	836	EG04nNoRGNcLmvP.exe	29
PID 836 wrote to memory of 1808	836	EG04nNoRGNcLmvP.exe	29
PID 836 wrote to memory of 1808	836	EG04nNoRGNcLmvP.exe	29
PID 836 wrote to memory of 1808	836	EG04nNoRGNcLmvP.exe	29
PID 836 wrote to memory of 1100	836	EG04nNoRGNcLmvP.exe	31
PID 836 wrote to memory of 1100	836	EG04nNoRGNcLmvP.exe	31
PID 836 wrote to memory of 1100	836	EG04nNoRGNcLmvP.exe	31
PID 836 wrote to memory of 1100	836	EG04nNoRGNcLmvP.exe	31

C:\Users\Admin\AppData\Local\Temp\EG04nNoRGNcLmvP.exe
"C:\Users\Admin\AppData\Local\Temp\EG04nNoRGNcLmvP.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1624
- C:\Users\Admin\AppData\Local\Temp\EG04nNoRGNcLmvP.exe
  "C:\Users\Admin\AppData\Local\Temp\EG04nNoRGNcLmvP.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:836
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "SMTP Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp8B9D.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:1808
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "SMTP Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp8E9A.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:1100

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/836-64-0x0000000000400000-0x0000000000438000-memory.dmp

Download

memory/836-79-0x0000000000660000-0x0000000000666000-memory.dmp

Download

memory/836-88-0x0000000002090000-0x000000000209F000-memory.dmp

Download

memory/836-61-0x0000000000400000-0x0000000000438000-memory.dmp

Download

memory/836-62-0x0000000000400000-0x0000000000438000-memory.dmp

Download

memory/836-63-0x0000000000400000-0x0000000000438000-memory.dmp

Download

memory/836-87-0x0000000002230000-0x0000000002259000-memory.dmp

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memory/836-65-0x0000000000400000-0x0000000000438000-memory.dmp

Download

memory/836-67-0x0000000000400000-0x0000000000438000-memory.dmp

Download

memory/836-69-0x00000000022B0000-0x00000000022B1000-memory.dmp

Download

memory/836-86-0x0000000001FF0000-0x0000000001FFA000-memory.dmp

Download

memory/836-85-0x0000000001FE0000-0x0000000001FEF000-memory.dmp

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memory/836-84-0x0000000001FD0000-0x0000000001FD9000-memory.dmp

Download

memory/836-83-0x00000000007C0000-0x00000000007CD000-memory.dmp

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memory/836-82-0x00000000006B0000-0x00000000006B7000-memory.dmp

Download

memory/836-81-0x00000000006A0000-0x00000000006A6000-memory.dmp

Download

memory/836-76-0x00000000003F0000-0x00000000003F3000-memory.dmp

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memory/836-77-0x00000000005E0000-0x00000000005ED000-memory.dmp

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memory/836-78-0x00000000005F0000-0x0000000000605000-memory.dmp

Download

memory/836-74-0x00000000003C0000-0x00000000003C5000-memory.dmp

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memory/836-80-0x0000000000690000-0x000000000069C000-memory.dmp

Download

memory/836-75-0x00000000003D0000-0x00000000003E9000-memory.dmp

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memory/1624-57-0x0000000075B71000-0x0000000075B73000-memory.dmp

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memory/1624-59-0x0000000000310000-0x0000000000314000-memory.dmp

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memory/1624-58-0x0000000004D50000-0x0000000004D51000-memory.dmp

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memory/1624-55-0x0000000010090000-0x0000000010091000-memory.dmp

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memory/1624-60-0x0000000002220000-0x0000000002286000-memory.dmp

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