nanocore | 8b62c11fae14388dbbf8adaf6309f52c01df5a0550d57ef539b054c30a6d4ae2

Analysis

max time kernel
146s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
15/02/2024, 19:34

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General

Target
9e637c57a2b4a4f5dec1b64eb679863c.exe
Size 797KB
Sample240215-yae3jafd43
SHA256 8b62c11fae14388dbbf8adaf6309f52c01df5a0550d57ef539b054c30a6d4ae2
MD5 9e637c57a2b4a4f5dec1b64eb679863c
SHA1 1d035d18436e9c7ccb3ed66cf8fefb7d43118b65
SHA512 639fcb29b7af9d404681f44afa78a2c430e17090f25c0f91b23cf84e8aee49fffaa879d7e99b3c09bd234e920f9ba546dab0850415a49524dee1a614529c790d
SSDEEP 12288:rJu8UqU2Yc2iNeHK7zF6ujQXk8FOs9mQNJezb6N+7Drpo3K+sRsYelHpDTy/6iiZ:rnP1b8sAcX3e3K7ylHpD0CluP
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nanocore evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

goz.ydns.eu:2557

Mutex

4ec7cdd0-12c2-4069-96e0-b83edb543d6f

Attributes

activate_away_mode
true
backup_connection_host
goz.ydns.eu
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2021-05-15T15:52:53.670457636Z
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
2557
default_group
Default
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
4ec7cdd0-12c2-4069-96e0-b83edb543d6f
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
goz.ydns.eu
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

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\SMTP Subsystem = "C:\\Program Files (x86)\\SMTP Subsystem\\smtpss.exe"	9e637c57a2b4a4f5dec1b64eb679863c.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	9e637c57a2b4a4f5dec1b64eb679863c.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4460 set thread context of 1044	4460	9e637c57a2b4a4f5dec1b64eb679863c.exe	97

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\SMTP Subsystem\smtpss.exe	9e637c57a2b4a4f5dec1b64eb679863c.exe
File opened for modification	C:\Program Files (x86)\SMTP Subsystem\smtpss.exe	9e637c57a2b4a4f5dec1b64eb679863c.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/Job

T1053

pid	Process
3448	schtasks.exe
3300	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
4460	9e637c57a2b4a4f5dec1b64eb679863c.exe
4460	9e637c57a2b4a4f5dec1b64eb679863c.exe
1044	9e637c57a2b4a4f5dec1b64eb679863c.exe
1044	9e637c57a2b4a4f5dec1b64eb679863c.exe
1044	9e637c57a2b4a4f5dec1b64eb679863c.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1044	9e637c57a2b4a4f5dec1b64eb679863c.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4460	9e637c57a2b4a4f5dec1b64eb679863c.exe
Token: SeDebugPrivilege	1044	9e637c57a2b4a4f5dec1b64eb679863c.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4460 wrote to memory of 3552	4460	9e637c57a2b4a4f5dec1b64eb679863c.exe	96
PID 4460 wrote to memory of 3552	4460	9e637c57a2b4a4f5dec1b64eb679863c.exe	96
PID 4460 wrote to memory of 3552	4460	9e637c57a2b4a4f5dec1b64eb679863c.exe	96
PID 4460 wrote to memory of 1044	4460	9e637c57a2b4a4f5dec1b64eb679863c.exe	97
PID 4460 wrote to memory of 1044	4460	9e637c57a2b4a4f5dec1b64eb679863c.exe	97
PID 4460 wrote to memory of 1044	4460	9e637c57a2b4a4f5dec1b64eb679863c.exe	97
PID 4460 wrote to memory of 1044	4460	9e637c57a2b4a4f5dec1b64eb679863c.exe	97
PID 4460 wrote to memory of 1044	4460	9e637c57a2b4a4f5dec1b64eb679863c.exe	97
PID 4460 wrote to memory of 1044	4460	9e637c57a2b4a4f5dec1b64eb679863c.exe	97
PID 4460 wrote to memory of 1044	4460	9e637c57a2b4a4f5dec1b64eb679863c.exe	97
PID 4460 wrote to memory of 1044	4460	9e637c57a2b4a4f5dec1b64eb679863c.exe	97
PID 1044 wrote to memory of 3300	1044	9e637c57a2b4a4f5dec1b64eb679863c.exe	98
PID 1044 wrote to memory of 3300	1044	9e637c57a2b4a4f5dec1b64eb679863c.exe	98
PID 1044 wrote to memory of 3300	1044	9e637c57a2b4a4f5dec1b64eb679863c.exe	98
PID 1044 wrote to memory of 3448	1044	9e637c57a2b4a4f5dec1b64eb679863c.exe	100
PID 1044 wrote to memory of 3448	1044	9e637c57a2b4a4f5dec1b64eb679863c.exe	100
PID 1044 wrote to memory of 3448	1044	9e637c57a2b4a4f5dec1b64eb679863c.exe	100

C:\Users\Admin\AppData\Local\Temp\9e637c57a2b4a4f5dec1b64eb679863c.exe
"C:\Users\Admin\AppData\Local\Temp\9e637c57a2b4a4f5dec1b64eb679863c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4460
- C:\Users\Admin\AppData\Local\Temp\9e637c57a2b4a4f5dec1b64eb679863c.exe
  "C:\Users\Admin\AppData\Local\Temp\9e637c57a2b4a4f5dec1b64eb679863c.exe"
  2⤵
  PID:3552
- C:\Users\Admin\AppData\Local\Temp\9e637c57a2b4a4f5dec1b64eb679863c.exe
  "C:\Users\Admin\AppData\Local\Temp\9e637c57a2b4a4f5dec1b64eb679863c.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:1044
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "SMTP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp363E.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:3300
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "SMTP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp36DB.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:3448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

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

9e637c57a2b4a4f5dec1b64eb679863c.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\9e637c57a2b4a4f5dec1b64eb679863c.exe.log
Size 1KB
SHA256 c18db6aecad2436da4a63ff26af4e3a337cca48f01c21b8db494fe5ccc60e553
MD5 17573558c4e714f606f997e5157afaac
SHA1 13e16e9415ceef429aaf124139671ebeca09ed23
SHA512 f4edf13f05a0d142e4dd42802098c8c44988ee8869621a62c2b565a77c9a95857f636583ff8d6d9baa366603d98b9bfbf1fc75bc6f9f8f83c80cb1215b2941cc
MD5 SHA1 SHA512

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tmp363E.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp363E.tmp
Size 1KB
SHA256 c7d5e6b5cf7636fd6ec1491783338d88acd1e496556a52c44089ebba913742ca
MD5 9ab55952c2e68abf14c7da498f42ef46
SHA1 8e1edff984f02f859f382defe47563f5ee0325ab
SHA512 2dab7b74e10d2ac3ec2b41cc670cf91dc60d61c2b0e138df5b00676d21c0ab409e001d6e63225b35beeb3a0da3fff8af6421eccdf7666a49453e7912c175dde7
MD5 SHA1 SHA512

Submit Download

tmp36DB.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp36DB.tmp
Size 1KB
SHA256 3d568a47a8944a47f4aed6982755ac7ff7dda469cc1c81c213ecaa5d89de1f83
MD5 0339b45ef206f4becc88be0d65e24b9e
SHA1 6503a1851f4ccd8c80a31f96bd7ae40d962c9fad
SHA512 c98f4513db34d50510dd986e0d812545c442bd5bef26932032b165759627fab4e00c95fe907ab3416a8a1042bfa77aa516c479f1ff7d1ec2f21ae66df8f72551
MD5 SHA1 SHA512

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memory/1044-13-0x0000000000400000-0x0000000000438000-memory.dmp

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memory/1044-30-0x0000000005600000-0x0000000005610000-memory.dmp

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memory/1044-29-0x0000000074A10000-0x00000000751C0000-memory.dmp

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memory/1044-28-0x00000000058F0000-0x00000000058FA000-memory.dmp

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memory/1044-27-0x0000000005480000-0x000000000549E000-memory.dmp

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memory/1044-26-0x0000000005470000-0x000000000547A000-memory.dmp

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memory/1044-18-0x0000000005600000-0x0000000005610000-memory.dmp

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memory/1044-16-0x0000000074A10000-0x00000000751C0000-memory.dmp

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memory/4460-6-0x0000000005170000-0x000000000517A000-memory.dmp

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memory/4460-7-0x00000000053B0000-0x0000000005406000-memory.dmp

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memory/4460-11-0x00000000085F0000-0x0000000008698000-memory.dmp

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memory/4460-10-0x0000000005030000-0x0000000005040000-memory.dmp

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memory/4460-17-0x0000000074A10000-0x00000000751C0000-memory.dmp

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memory/4460-9-0x0000000074A10000-0x00000000751C0000-memory.dmp

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memory/4460-8-0x0000000007FD0000-0x0000000007FE6000-memory.dmp

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memory/4460-12-0x000000000AD70000-0x000000000ADAA000-memory.dmp

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memory/4460-0-0x0000000000600000-0x00000000006CE000-memory.dmp

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memory/4460-5-0x0000000005030000-0x0000000005040000-memory.dmp

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memory/4460-4-0x00000000051C0000-0x0000000005252000-memory.dmp

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memory/4460-3-0x00000000056D0000-0x0000000005C74000-memory.dmp

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memory/4460-2-0x0000000005070000-0x000000000510C000-memory.dmp

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memory/4460-1-0x0000000074A10000-0x00000000751C0000-memory.dmp

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