nanocore | 3a7d96ae663db0818d0a57584e6d5a83a75177fe3ccea93006ce5aca634f3f2b

Analysis

max time kernel
133s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25/01/2024, 01:22

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General

Target
735cb9b60581fdddb9147d58cd3e0a83.exe
Size 675KB
Sample240125-brcbmsdebq
SHA256 3a7d96ae663db0818d0a57584e6d5a83a75177fe3ccea93006ce5aca634f3f2b
MD5 735cb9b60581fdddb9147d58cd3e0a83
SHA1 babe708bdfe790e5b774ab9de981e23c9e0fa46a
SHA512 c8d765807ff340318c8ae640a7197efaf644b968f266fac0602b8852ea4a75ebd5d362640d865a8dacf7ad652ebe19be32be8e7e5177363803496409d3a5bd82
SSDEEP 12288:63lb4u4DRpasq+f4bcSEcE3n7KavljtcRTFaMTHfar5mk1/PoT+hOHL7/9q0a8SF:63lbyvq+f4Ol3n73ARJDHmY
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nanocore evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

ghsgatvxbznmklopwagdhusvxbznxgtewuahjkop.ydns.eu:6932

Mutex

2c85ad92-6de0-4747-89f8-309755c29459

Attributes

activate_away_mode
true
backup_connection_host
ghsgatvxbznmklopwagdhusvxbznxgtewuahjkop.ydns.eu
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2021-04-24T07:47:17.942528636Z
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
6932
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
2c85ad92-6de0-4747-89f8-309755c29459
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\NAT Subsystem = "C:\\Program Files (x86)\\NAT Subsystem\\natss.exe"	735cb9b60581fdddb9147d58cd3e0a83.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	735cb9b60581fdddb9147d58cd3e0a83.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4328 set thread context of 1680	4328	735cb9b60581fdddb9147d58cd3e0a83.exe	100

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\NAT Subsystem\natss.exe	735cb9b60581fdddb9147d58cd3e0a83.exe
File opened for modification	C:\Program Files (x86)\NAT Subsystem\natss.exe	735cb9b60581fdddb9147d58cd3e0a83.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
2132	schtasks.exe
1944	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1680	735cb9b60581fdddb9147d58cd3e0a83.exe
1680	735cb9b60581fdddb9147d58cd3e0a83.exe
1680	735cb9b60581fdddb9147d58cd3e0a83.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1680	735cb9b60581fdddb9147d58cd3e0a83.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1680	735cb9b60581fdddb9147d58cd3e0a83.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4328 wrote to memory of 1680	4328	735cb9b60581fdddb9147d58cd3e0a83.exe	100
PID 4328 wrote to memory of 1680	4328	735cb9b60581fdddb9147d58cd3e0a83.exe	100
PID 4328 wrote to memory of 1680	4328	735cb9b60581fdddb9147d58cd3e0a83.exe	100
PID 4328 wrote to memory of 1680	4328	735cb9b60581fdddb9147d58cd3e0a83.exe	100
PID 4328 wrote to memory of 1680	4328	735cb9b60581fdddb9147d58cd3e0a83.exe	100
PID 4328 wrote to memory of 1680	4328	735cb9b60581fdddb9147d58cd3e0a83.exe	100
PID 4328 wrote to memory of 1680	4328	735cb9b60581fdddb9147d58cd3e0a83.exe	100
PID 4328 wrote to memory of 1680	4328	735cb9b60581fdddb9147d58cd3e0a83.exe	100
PID 1680 wrote to memory of 2132	1680	735cb9b60581fdddb9147d58cd3e0a83.exe	101
PID 1680 wrote to memory of 2132	1680	735cb9b60581fdddb9147d58cd3e0a83.exe	101
PID 1680 wrote to memory of 2132	1680	735cb9b60581fdddb9147d58cd3e0a83.exe	101
PID 1680 wrote to memory of 1944	1680	735cb9b60581fdddb9147d58cd3e0a83.exe	103
PID 1680 wrote to memory of 1944	1680	735cb9b60581fdddb9147d58cd3e0a83.exe	103
PID 1680 wrote to memory of 1944	1680	735cb9b60581fdddb9147d58cd3e0a83.exe	103

C:\Users\Admin\AppData\Local\Temp\735cb9b60581fdddb9147d58cd3e0a83.exe
"C:\Users\Admin\AppData\Local\Temp\735cb9b60581fdddb9147d58cd3e0a83.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4328
- C:\Users\Admin\AppData\Local\Temp\735cb9b60581fdddb9147d58cd3e0a83.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:1680
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "NAT Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmpD1E6.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:2132
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "NAT Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpD235.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:1944

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

735cb9b60581fdddb9147d58cd3e0a83.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\735cb9b60581fdddb9147d58cd3e0a83.exe.log
Size 496B
SHA256 8d0edecf54cbbdf7981c8e41a3ed8621503188a87415f9af0fb8d890b138c349
MD5 cb76b18ebed3a9f05a14aed43d35fba6
SHA1 836a4b4e351846fca08b84149cb734cb59b8c0d6
SHA512 7631141e4a6dda29452ada666326837372cd3d045f773006f63d9eff15d9432ed00029d9108a72c1a3b858377600a2aab2c9ec03764285c8801b6019babcf21c
MD5 SHA1 SHA512

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tmpD1E6.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpD1E6.tmp
Size 1KB
SHA256 c6017303f1507313874880822e9b4ff18c7400e1103615109104c33dcf042b9f
MD5 bf7e7ba282f3d6a0ca4237398bc572c9
SHA1 8d34e41e604e3f6e4ac24ecc38cfd62f2d8cf205
SHA512 b576826e1e3cb95d9fcf3c9ff1a20179bc647d8215a3601efaf521abb69b05c0d6bdfdadfcd5df299de6802001c1a616a6af730a5168f2b5322462f9f9623f4b
MD5 SHA1 SHA512

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tmpD235.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpD235.tmp
Size 1KB
SHA256 52cdb418384a912c5b7071c92d7761f0d12250f07dbbb31876eb2e8d65acbae7
MD5 c58d37cb49c18f1d7cece3c78ac2f407
SHA1 769ed0ea9d5269e1cec7234eaac77da129cc0463
SHA512 2efcb3eaf050d56ad3d483112303a1543f9fc457119fbca7d81b45d5619c0f1ba706ce96644d4e2055c1b5ada7af13f071495287a775ce234d9125633bf02775
MD5 SHA1 SHA512

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memory/1680-22-0x0000000001400000-0x0000000001410000-memory.dmp

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memory/1680-21-0x0000000001400000-0x0000000001410000-memory.dmp

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memory/1680-20-0x0000000074F20000-0x00000000754D1000-memory.dmp

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memory/1680-19-0x0000000001400000-0x0000000001410000-memory.dmp

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memory/1680-5-0x0000000000400000-0x0000000000438000-memory.dmp

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memory/1680-10-0x0000000001400000-0x0000000001410000-memory.dmp

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memory/1680-8-0x0000000074F20000-0x00000000754D1000-memory.dmp

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memory/1680-11-0x0000000074F20000-0x00000000754D1000-memory.dmp

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memory/4328-4-0x0000000001020000-0x0000000001030000-memory.dmp

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memory/4328-9-0x0000000074F20000-0x00000000754D1000-memory.dmp

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memory/4328-1-0x0000000001020000-0x0000000001030000-memory.dmp

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memory/4328-3-0x0000000074F20000-0x00000000754D1000-memory.dmp

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memory/4328-2-0x0000000074F20000-0x00000000754D1000-memory.dmp

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memory/4328-0-0x0000000074F20000-0x00000000754D1000-memory.dmp

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