nanocore | c586e4a6c2231c2829ee686488c28be502fea6204d5a2a33238aa1f4ed56e8b2

Analysis

max time kernel
90s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
15/02/2023, 15:16

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General

Target
a1f40bdbdecab8fbf44aca92050ae727.exe
Size 951KB
Sample230215-snfy4acb71
SHA256 c586e4a6c2231c2829ee686488c28be502fea6204d5a2a33238aa1f4ed56e8b2
MD5 a1f40bdbdecab8fbf44aca92050ae727
SHA1 b1618d26849db07add7233066fd398b8bd632a06
SHA512 f8d08d558ea75d3f9c0473cc4b7a0d05d37c9a41ef69def91425ae8407d1cabbb83601f5a9438f0823325bf9fe394b090bf8e9af4c885d1c5d0c78c4efe3bf3b
SSDEEP 24576:tp+CkV2K1nt+LmKLABtZ+YTO+F44fBJfBYaAI:CCmThtExLABtQxG4MBYvI
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nanocore evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

tzitziklishop.ddns.net:1665
127.0.0.1:1665

Mutex

be28fce4-4930-4ffe-96ed-0110cf99b889

Attributes

activate_away_mode
true
backup_connection_host
127.0.0.1
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2022-11-05T12:54:30.362923036Z
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
1665
default_group
SecureKMT
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
be28fce4-4930-4ffe-96ed-0110cf99b889
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
tzitziklishop.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

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\TCP Subsystem = "C:\\Program Files (x86)\\TCP Subsystem\\tcpss.exe"	a1f40bdbdecab8fbf44aca92050ae727.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	a1f40bdbdecab8fbf44aca92050ae727.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4488 set thread context of 1260	4488	a1f40bdbdecab8fbf44aca92050ae727.exe	88

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\TCP Subsystem\tcpss.exe	a1f40bdbdecab8fbf44aca92050ae727.exe
File created	C:\Program Files (x86)\TCP Subsystem\tcpss.exe	a1f40bdbdecab8fbf44aca92050ae727.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
2296	schtasks.exe
5024	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1260	a1f40bdbdecab8fbf44aca92050ae727.exe
1260	a1f40bdbdecab8fbf44aca92050ae727.exe
1260	a1f40bdbdecab8fbf44aca92050ae727.exe
1260	a1f40bdbdecab8fbf44aca92050ae727.exe
1260	a1f40bdbdecab8fbf44aca92050ae727.exe
1260	a1f40bdbdecab8fbf44aca92050ae727.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1260	a1f40bdbdecab8fbf44aca92050ae727.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1260	a1f40bdbdecab8fbf44aca92050ae727.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4488 wrote to memory of 1260	4488	a1f40bdbdecab8fbf44aca92050ae727.exe	88
PID 4488 wrote to memory of 1260	4488	a1f40bdbdecab8fbf44aca92050ae727.exe	88
PID 4488 wrote to memory of 1260	4488	a1f40bdbdecab8fbf44aca92050ae727.exe	88
PID 4488 wrote to memory of 1260	4488	a1f40bdbdecab8fbf44aca92050ae727.exe	88
PID 4488 wrote to memory of 1260	4488	a1f40bdbdecab8fbf44aca92050ae727.exe	88
PID 4488 wrote to memory of 1260	4488	a1f40bdbdecab8fbf44aca92050ae727.exe	88
PID 4488 wrote to memory of 1260	4488	a1f40bdbdecab8fbf44aca92050ae727.exe	88
PID 4488 wrote to memory of 1260	4488	a1f40bdbdecab8fbf44aca92050ae727.exe	88
PID 1260 wrote to memory of 2296	1260	a1f40bdbdecab8fbf44aca92050ae727.exe	89
PID 1260 wrote to memory of 2296	1260	a1f40bdbdecab8fbf44aca92050ae727.exe	89
PID 1260 wrote to memory of 2296	1260	a1f40bdbdecab8fbf44aca92050ae727.exe	89
PID 1260 wrote to memory of 5024	1260	a1f40bdbdecab8fbf44aca92050ae727.exe	91
PID 1260 wrote to memory of 5024	1260	a1f40bdbdecab8fbf44aca92050ae727.exe	91
PID 1260 wrote to memory of 5024	1260	a1f40bdbdecab8fbf44aca92050ae727.exe	91

C:\Users\Admin\AppData\Local\Temp\a1f40bdbdecab8fbf44aca92050ae727.exe
"C:\Users\Admin\AppData\Local\Temp\a1f40bdbdecab8fbf44aca92050ae727.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4488
- C:\Users\Admin\AppData\Local\Temp\a1f40bdbdecab8fbf44aca92050ae727.exe
  "C:\Users\Admin\AppData\Local\Temp\a1f40bdbdecab8fbf44aca92050ae727.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:1260
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "TCP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp1973.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:2296
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "TCP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp1A20.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:5024

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

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Downloads

a1f40bdbdecab8fbf44aca92050ae727.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\a1f40bdbdecab8fbf44aca92050ae727.exe.log
Size 1KB
SHA256 7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982
MD5 8ec831f3e3a3f77e4a7b9cd32b48384c
SHA1 d83f09fd87c5bd86e045873c231c14836e76a05c
SHA512 26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3
MD5 SHA1 SHA512

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tmp1973.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp1973.tmp
Size 1KB
SHA256 6c068c48166676ed08ee37e3ae18d1498fc05c79f925d80677f9effd242238a7
MD5 6f27f667a752e1e65d3a0b7739d41628
SHA1 0253ea907180b599451270e064032c7884abf9f2
SHA512 d8ff600a94e83a04e2e9ac251c8838e958fd9bc1ec109a2c9ef4520e494374386fdcf13b09d00f7e858ae7c7b25448631b85375990f2428f6a80386b7829782a
MD5 SHA1 SHA512

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tmp1A20.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp1A20.tmp
Size 1KB
SHA256 062844155306130d6fafc4fe10ac9e5ddd2ed462532b729c50cdc979c0d83207
MD5 4b7ef560289c0f62d0baf6f14f48a57a
SHA1 8331acb90dde588aa3196919f6e847f398fd06d1
SHA512 ecaa27c4b703d95f9f9b37d8c339982970482e7dab968c2010e0aa644bbfa31973111aafb827565af30c423d1d14e4ff997ec149614e713ff7ef3456894d02d8
MD5 SHA1 SHA512

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memory/1260-138-0x0000000000400000-0x0000000000438000-memory.dmp

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memory/1260-144-0x0000000006E20000-0x0000000006E86000-memory.dmp

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memory/4488-136-0x0000000008EF0000-0x0000000008F8C000-memory.dmp

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memory/4488-132-0x0000000000510000-0x0000000000604000-memory.dmp

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memory/4488-135-0x0000000004FC0000-0x0000000004FCA000-memory.dmp

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memory/4488-134-0x0000000005000000-0x0000000005092000-memory.dmp

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memory/4488-133-0x0000000005510000-0x0000000005AB4000-memory.dmp

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