nanocore | d5fd7a128946e660c098d21d1f6376ea1e66e73ed23625b571bab00b622620b1

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
25/01/2024, 09:06

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General

Target
7449ec56f86a0d2bf0c9be03aaa334aa.exe
Size 885KB
Sample240125-k2xj1adcel
SHA256 d5fd7a128946e660c098d21d1f6376ea1e66e73ed23625b571bab00b622620b1
MD5 7449ec56f86a0d2bf0c9be03aaa334aa
SHA1 179c61470552fb4c2e5de4132fccd4bc16f7d154
SHA512 cb84dc3a205b96cc66f7b0c4353a39a3a19a9ee12087d6588aa06dce724d80927680937f032efbb29e363af798e2c59e465809a943832b9259b590dc2124f177
SSDEEP 12288:pPBqDEjk+koJXfXUy3UMtS76hP5p82BZ77KcDTynd2uGFGbUQqZv8di5QGzDxQ20:7mEPY776xLdZKWTynLZb
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nanocore evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

wywtrwbnmhtytrebsgwtfcvzcxgjhyegvbcnmgte.ydns.eu:2486

Mutex

38e550b1-749b-4070-a891-ba3703218cb4

Attributes

activate_away_mode
true
backup_connection_host
wywtrwbnmhtytrebsgwtfcvzcxgjhyegvbcnmgte.ydns.eu
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-12-05T22:55:32.707339436Z
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
2486
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
38e550b1-749b-4070-a891-ba3703218cb4
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
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"	7449ec56f86a0d2bf0c9be03aaa334aa.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	7449ec56f86a0d2bf0c9be03aaa334aa.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4136 set thread context of 2504	4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe	98

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\SMTP Subsystem\smtpss.exe	7449ec56f86a0d2bf0c9be03aaa334aa.exe
File opened for modification	C:\Program Files (x86)\SMTP Subsystem\smtpss.exe	7449ec56f86a0d2bf0c9be03aaa334aa.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
2508	schtasks.exe
4140	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe
4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe
4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe
4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe
4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe
4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe
4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe
2504	7449ec56f86a0d2bf0c9be03aaa334aa.exe
2504	7449ec56f86a0d2bf0c9be03aaa334aa.exe
2504	7449ec56f86a0d2bf0c9be03aaa334aa.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2504	7449ec56f86a0d2bf0c9be03aaa334aa.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe
Token: SeDebugPrivilege	2504	7449ec56f86a0d2bf0c9be03aaa334aa.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4136 wrote to memory of 3496	4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe	96
PID 4136 wrote to memory of 3496	4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe	96
PID 4136 wrote to memory of 3496	4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe	96
PID 4136 wrote to memory of 4024	4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe	97
PID 4136 wrote to memory of 4024	4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe	97
PID 4136 wrote to memory of 4024	4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe	97
PID 4136 wrote to memory of 2504	4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe	98
PID 4136 wrote to memory of 2504	4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe	98
PID 4136 wrote to memory of 2504	4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe	98
PID 4136 wrote to memory of 2504	4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe	98
PID 4136 wrote to memory of 2504	4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe	98
PID 4136 wrote to memory of 2504	4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe	98
PID 4136 wrote to memory of 2504	4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe	98
PID 4136 wrote to memory of 2504	4136	7449ec56f86a0d2bf0c9be03aaa334aa.exe	98
PID 2504 wrote to memory of 2508	2504	7449ec56f86a0d2bf0c9be03aaa334aa.exe	99
PID 2504 wrote to memory of 2508	2504	7449ec56f86a0d2bf0c9be03aaa334aa.exe	99
PID 2504 wrote to memory of 2508	2504	7449ec56f86a0d2bf0c9be03aaa334aa.exe	99
PID 2504 wrote to memory of 4140	2504	7449ec56f86a0d2bf0c9be03aaa334aa.exe	101
PID 2504 wrote to memory of 4140	2504	7449ec56f86a0d2bf0c9be03aaa334aa.exe	101
PID 2504 wrote to memory of 4140	2504	7449ec56f86a0d2bf0c9be03aaa334aa.exe	101

C:\Users\Admin\AppData\Local\Temp\7449ec56f86a0d2bf0c9be03aaa334aa.exe
"C:\Users\Admin\AppData\Local\Temp\7449ec56f86a0d2bf0c9be03aaa334aa.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4136
- C:\Users\Admin\AppData\Local\Temp\7449ec56f86a0d2bf0c9be03aaa334aa.exe
  "{path}"
  2⤵
  PID:3496
- C:\Users\Admin\AppData\Local\Temp\7449ec56f86a0d2bf0c9be03aaa334aa.exe
  "{path}"
  2⤵
  PID:4024
- C:\Users\Admin\AppData\Local\Temp\7449ec56f86a0d2bf0c9be03aaa334aa.exe
  "{path}"
  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:2504
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "SMTP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmpC0A0.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:2508
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "SMTP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpC0E0.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:4140

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

7449ec56f86a0d2bf0c9be03aaa334aa.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\7449ec56f86a0d2bf0c9be03aaa334aa.exe.log
Size 496B
SHA256 a632504621b4cac1d5ba5465c7ad9b30f3d036e9838682506782124a211bed4f
MD5 7baa6583f69f63f7230df9bf98448356
SHA1 fe9eb85b57192362da704a3c130377fe83862320
SHA512 0e72541791281c0fdac1f5fc6beea0b9eb8766b2a386aecb92cb8a44e5b59b7114c79194393ddeff957ffe86021a311caed7ce2731b863d97ad441870efbc051
MD5 SHA1 SHA512

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tmpC0A0.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpC0A0.tmp
Size 1KB
SHA256 d5c18ec0a6210105e309e0dc8022f0c2189f7f49c6436f371038a1e66585ff01
MD5 9f58ab3be832c9b3b74688cf03ba4c8c
SHA1 cff0fc7150d75f47c5cb096f758ade97406dfed0
SHA512 31a6cb66582cf76d435e637b96ebcfddf0b9ee6280d45e64e419180046eca3231028392a2fc631f4e465c00116b19c7d9f4264402226de61ba891246ac67597e
MD5 SHA1 SHA512

Submit Download

tmpC0E0.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpC0E0.tmp
Size 1KB
SHA256 3d568a47a8944a47f4aed6982755ac7ff7dda469cc1c81c213ecaa5d89de1f83
MD5 0339b45ef206f4becc88be0d65e24b9e
SHA1 6503a1851f4ccd8c80a31f96bd7ae40d962c9fad
SHA512 c98f4513db34d50510dd986e0d812545c442bd5bef26932032b165759627fab4e00c95fe907ab3416a8a1042bfa77aa516c479f1ff7d1ec2f21ae66df8f72551
MD5 SHA1 SHA512

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memory/2504-9-0x0000000074DD0000-0x0000000075381000-memory.dmp

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memory/2504-19-0x0000000001130000-0x0000000001140000-memory.dmp

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memory/2504-5-0x0000000000400000-0x0000000000438000-memory.dmp

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memory/2504-22-0x0000000001130000-0x0000000001140000-memory.dmp

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memory/2504-21-0x0000000001130000-0x0000000001140000-memory.dmp

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memory/2504-20-0x0000000074DD0000-0x0000000075381000-memory.dmp

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memory/2504-10-0x0000000001130000-0x0000000001140000-memory.dmp

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memory/2504-14-0x0000000074DD0000-0x0000000075381000-memory.dmp

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memory/4136-2-0x0000000074DD0000-0x0000000075381000-memory.dmp

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memory/4136-1-0x0000000001BB0000-0x0000000001BC0000-memory.dmp

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memory/4136-4-0x0000000001BB0000-0x0000000001BC0000-memory.dmp

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memory/4136-0-0x0000000074DD0000-0x0000000075381000-memory.dmp

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memory/4136-8-0x0000000074DD0000-0x0000000075381000-memory.dmp

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memory/4136-3-0x0000000074DD0000-0x0000000075381000-memory.dmp

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