nanocore | c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36

Analysis

max time kernel
148s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
29/04/2024, 01:56

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General

Target
c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe
Size 1.4MB
Sample240429-cc4ysaeh94
SHA256 c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36
MD5 7257ada04fb81f4a7cc024eca879188b
SHA1 bb40820a78fa5ac26589e557b2d2f14fac23cf45
SHA512 193c3c73b01fcc7922c92d7162c2cce09ae6170a13d7e88d69978b5ccc93fc20938895df89e56122cf516eb13ceafe1f8c40086f181321ca33dfb6f4a78a5f35
SSDEEP 24576:6AHnh+eWsN3skA4RV1Hom2KXMmHaYDBNkmBRGEMdSR5ADIAsG/jJ45O:Nh+ZkldoPK8YaZSeIAmO
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nanocore evasion keylogger spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

bnow.duckdns.org:4156

Mutex

fc4000c4-f8ec-42dc-a0ad-1edfd7548ceb

Attributes

activate_away_mode
true
backup_connection_host
bnow.duckdns.org
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2018-08-20T04:39:27.808758936Z
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
4156
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
fc4000c4-f8ec-42dc-a0ad-1edfd7548ceb
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
bnow.duckdns.org
primary_dns_server
8.8.8.8
request_elevation
true
restart_delay
5000
run_delay
0
run_on_startup
true
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

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe
Key value queried	\REGISTRY\USER\S-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	igfxEM.exe
Key value queried	\REGISTRY\USER\S-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	igfxEM.exe

Executes dropped EXE 2 IoCs

pid	Process
2732	igfxEM.exe
2628	igfxEM.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	RegAsm.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x000a000000023bb1-19.dat	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1096 set thread context of 4044	1096	c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe	86
PID 2732 set thread context of 2196	2732	igfxEM.exe	101
PID 2628 set thread context of 4476	2628	igfxEM.exe	105

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 4 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
4896	schtasks.exe
1632	schtasks.exe
3460	schtasks.exe
3076	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4044	RegAsm.exe
4044	RegAsm.exe
4044	RegAsm.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4044	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4044	RegAsm.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1096 wrote to memory of 4044	1096	c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe	86
PID 1096 wrote to memory of 4044	1096	c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe	86
PID 1096 wrote to memory of 4044	1096	c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe	86
PID 1096 wrote to memory of 4044	1096	c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe	86
PID 1096 wrote to memory of 4044	1096	c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe	86
PID 4044 wrote to memory of 4896	4044	RegAsm.exe	87
PID 4044 wrote to memory of 4896	4044	RegAsm.exe	87
PID 4044 wrote to memory of 4896	4044	RegAsm.exe	87
PID 1096 wrote to memory of 1632	1096	c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe	89
PID 1096 wrote to memory of 1632	1096	c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe	89
PID 1096 wrote to memory of 1632	1096	c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe	89
PID 2732 wrote to memory of 2196	2732	igfxEM.exe	101
PID 2732 wrote to memory of 2196	2732	igfxEM.exe	101
PID 2732 wrote to memory of 2196	2732	igfxEM.exe	101
PID 2732 wrote to memory of 2196	2732	igfxEM.exe	101
PID 2732 wrote to memory of 2196	2732	igfxEM.exe	101
PID 2732 wrote to memory of 3460	2732	igfxEM.exe	102
PID 2732 wrote to memory of 3460	2732	igfxEM.exe	102
PID 2732 wrote to memory of 3460	2732	igfxEM.exe	102
PID 2628 wrote to memory of 4476	2628	igfxEM.exe	105
PID 2628 wrote to memory of 4476	2628	igfxEM.exe	105
PID 2628 wrote to memory of 4476	2628	igfxEM.exe	105
PID 2628 wrote to memory of 4476	2628	igfxEM.exe	105
PID 2628 wrote to memory of 4476	2628	igfxEM.exe	105
PID 2628 wrote to memory of 3076	2628	igfxEM.exe	106
PID 2628 wrote to memory of 3076	2628	igfxEM.exe	106
PID 2628 wrote to memory of 3076	2628	igfxEM.exe	106

C:\Users\Admin\AppData\Local\Temp\c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe
"C:\Users\Admin\AppData\Local\Temp\c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1096
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  - Checks whether UAC is enabled
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4044
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "DSL Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmp4277.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:4896
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\SysWOW64\schtasks.exe" /create /tn azroles /tr "C:\Users\Admin\WinSAT\igfxEM.exe" /sc minute /mo 1 /F
  2⤵
  - Creates scheduled task(s)
  PID:1632

C:\Users\Admin\WinSAT\igfxEM.exe
C:\Users\Admin\WinSAT\igfxEM.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2732
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  PID:2196
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\SysWOW64\schtasks.exe" /create /tn azroles /tr "C:\Users\Admin\WinSAT\igfxEM.exe" /sc minute /mo 1 /F
  2⤵
  - Creates scheduled task(s)
  PID:3460

C:\Users\Admin\WinSAT\igfxEM.exe
C:\Users\Admin\WinSAT\igfxEM.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2628
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  PID:4476
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\SysWOW64\schtasks.exe" /create /tn azroles /tr "C:\Users\Admin\WinSAT\igfxEM.exe" /sc minute /mo 1 /F
  2⤵
  - Creates scheduled task(s)
  PID:3076

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

RegAsm.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\RegAsm.exe.log
Size 496B
SHA256 e248cef9500ed6e0c9f99d72a2a6a36955a5f0cfc0725748ef25a733cc8282f6
MD5 5b4789d01bb4d7483b71e1a35bce6a8b
SHA1 de083f2131c9a763c0d1810c97a38732146cffbf
SHA512 357e18ef30430e4b9cc4f2569b9735b1cd12f934c83162e4de78ac29ba9703b63ddb624ccc22afd5a5868f6e9d91a3c64581846abac22e9625f5b2e3d80b3ede
MD5 SHA1 SHA512

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tmp4277.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp4277.tmp
Size 1KB
SHA256 8dfc4e937f0b2374e3ced25fce344b0731cf44b8854625b318d50ece2da8f576
MD5 c6f0625bf4c1cdfb699980c9243d3b22
SHA1 43de1fe580576935516327f17b5da0c656c72851
SHA512 9ef2dbd4142ad0e1e6006929376ecb8011e7ffc801ee2101e906787d70325ad82752df65839de9972391fa52e1e5974ec1a5c7465a88aa56257633ebb7d70969
MD5 SHA1 SHA512

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igfxEM.exe

Path C:\Users\Admin\WinSAT\igfxEM.exe
Size 1.4MB
SHA256 3a33402f4eabcb2475e86ee1041af49e9d1fd69f95ea2229d8af3726b316ddea
MD5 2a09f22796068af9f846064ad8a324d1
SHA1 a768619316f896a719d144ad6ab7069baf8bdc59
SHA512 e104ccdec7ad6f709cfb1908b1b18bca60784bffada78efb242f18a848fa4abb071d5e9c0061a46cc65e0e9f81c971314f18236f5db234ff13f16c3d2c9fe656
SSDEEP 24576:6AHnh+eWsN3skA4RV1Hom2KXMmHaYDBNkmBRGEMdSR5ADIAsG/jJ45u:Nh+ZkldoPK8YaZSeIAmu
MD5 SHA1 SHA512 SSDEEP

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memory/1096-0-0x0000000003D00000-0x0000000003D01000-memory.dmp

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memory/2196-21-0x0000000000400000-0x0000000000438000-memory.dmp

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memory/4044-8-0x00000000020E0000-0x00000000020F0000-memory.dmp

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memory/4044-17-0x0000000073D40000-0x00000000742F1000-memory.dmp

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memory/4044-18-0x00000000020E0000-0x00000000020F0000-memory.dmp

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memory/4044-16-0x0000000073D40000-0x00000000742F1000-memory.dmp

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memory/4044-7-0x0000000073D40000-0x00000000742F1000-memory.dmp

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memory/4044-6-0x0000000073D40000-0x00000000742F1000-memory.dmp

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memory/4044-2-0x00000000001B0000-0x00000000001E8000-memory.dmp

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memory/4476-30-0x0000000000590000-0x00000000005C8000-memory.dmp

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