nanocore | 3ca8fab40fbbaf3d389adce9db716872bd31e98e712488d5487d10612ef91ad6

Analysis

max time kernel
146s
max time network
147s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
18-06-2024 16:36

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General

Target

final bill copy 28.6.2020.exe
Size

322KB
MD5

cdb11d14d3d4d9629af79ca24674574b
SHA1

aad5682a4c9798a81ca7ab34a87f281c8df77f4f
SHA256

cb5eb4758a41046a2f3fc084731d756aedf8ea212dc08c9bb2e6cd7f5eff6cae
SHA512

0712d60b0e49b309cc7423681e2523eb9c0e9c7119145a92b6312a8175680e11766eb1c9b63dd74527ba4941b91c668923ef37c3a0faf0c956731700fa9725d9
SSDEEP

6144:6w9LKRcqSGjUkVP0H6JBh2dxPzH7PetJiRE6ta5vj:6w4+GjF5JB0DPHRE

Score

10^/10

nanocore evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

officezafar.hopto.org:3575

79.134.225.105:3575

Mutex

addcef97-a3fd-4088-97c4-b33550fc9a8a

Attributes

activate_away_mode
true
backup_connection_host
79.134.225.105
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-03-30T16:41:31.745741536Z
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
3575
default_group
officezafar
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
addcef97-a3fd-4088-97c4-b33550fc9a8a
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
officezafar.hopto.org
primary_dns_server
8.8.8.8
request_elevation
false
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
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

2516 cmd.exe
Adds Run key to start application 2 TTPs 1 IoCs
persistence

Registry Run Keys / Startup Folder
T1547.001

Modify Registry
T1112

Processes:

RegAsm.exe

description ioc process

Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\TCP Subsystem = "C:\\Program Files (x86)\\TCP Subsystem\\tcpss.exe" RegAsm.exe
Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

RegAsm.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA RegAsm.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

final bill copy 28.6.2020.exe

description pid process target process

PID 1984 set thread context of 2688 1984 final bill copy 28.6.2020.exe RegAsm.exe
Drops file in Program Files directory 2 IoCs

Processes:

RegAsm.exe

description ioc process

File created C:\Program Files (x86)\TCP Subsystem\tcpss.exe RegAsm.exe
File opened for modification C:\Program Files (x86)\TCP Subsystem\tcpss.exe RegAsm.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exeschtasks.exe

pid process

2544 schtasks.exe
2504 schtasks.exe

pid	process
2516	cmd.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\TCP Subsystem = "C:\\Program Files (x86)\\TCP Subsystem\\tcpss.exe"	RegAsm.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	RegAsm.exe

description	pid	process	target process
PID 1984 set thread context of 2688	1984	final bill copy 28.6.2020.exe	RegAsm.exe

description	ioc	process
File created	C:\Program Files (x86)\TCP Subsystem\tcpss.exe	RegAsm.exe
File opened for modification	C:\Program Files (x86)\TCP Subsystem\tcpss.exe	RegAsm.exe

pid	process
2544	schtasks.exe
2504	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

final bill copy 28.6.2020.exe

pid	process
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe
1984	final bill copy 28.6.2020.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

RegAsm.exe

pid process

2688 RegAsm.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

final bill copy 28.6.2020.exe

pid process

1984 final bill copy 28.6.2020.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

final bill copy 28.6.2020.exeRegAsm.exe

description pid process

Token: SeDebugPrivilege 1984 final bill copy 28.6.2020.exe
Token: SeDebugPrivilege 2688 RegAsm.exe

pid	process
2688	RegAsm.exe

description	pid	process
Token: SeDebugPrivilege	1984	final bill copy 28.6.2020.exe
Token: SeDebugPrivilege	2688	RegAsm.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

final bill copy 28.6.2020.execmd.exeRegAsm.exe

description	pid	process	target process
PID 1984 wrote to memory of 2688	1984	final bill copy 28.6.2020.exe	RegAsm.exe
PID 1984 wrote to memory of 2688	1984	final bill copy 28.6.2020.exe	RegAsm.exe
PID 1984 wrote to memory of 2688	1984	final bill copy 28.6.2020.exe	RegAsm.exe
PID 1984 wrote to memory of 2688	1984	final bill copy 28.6.2020.exe	RegAsm.exe
PID 1984 wrote to memory of 2688	1984	final bill copy 28.6.2020.exe	RegAsm.exe
PID 1984 wrote to memory of 2688	1984	final bill copy 28.6.2020.exe	RegAsm.exe
PID 1984 wrote to memory of 2688	1984	final bill copy 28.6.2020.exe	RegAsm.exe
PID 1984 wrote to memory of 2688	1984	final bill copy 28.6.2020.exe	RegAsm.exe
PID 1984 wrote to memory of 2516	1984	final bill copy 28.6.2020.exe	cmd.exe
PID 1984 wrote to memory of 2516	1984	final bill copy 28.6.2020.exe	cmd.exe
PID 1984 wrote to memory of 2516	1984	final bill copy 28.6.2020.exe	cmd.exe
PID 1984 wrote to memory of 2516	1984	final bill copy 28.6.2020.exe	cmd.exe
PID 2516 wrote to memory of 2600	2516	cmd.exe	choice.exe
PID 2516 wrote to memory of 2600	2516	cmd.exe	choice.exe
PID 2516 wrote to memory of 2600	2516	cmd.exe	choice.exe
PID 2516 wrote to memory of 2600	2516	cmd.exe	choice.exe
PID 2688 wrote to memory of 2544	2688	RegAsm.exe	schtasks.exe
PID 2688 wrote to memory of 2544	2688	RegAsm.exe	schtasks.exe
PID 2688 wrote to memory of 2544	2688	RegAsm.exe	schtasks.exe
PID 2688 wrote to memory of 2544	2688	RegAsm.exe	schtasks.exe
PID 2688 wrote to memory of 2504	2688	RegAsm.exe	schtasks.exe
PID 2688 wrote to memory of 2504	2688	RegAsm.exe	schtasks.exe
PID 2688 wrote to memory of 2504	2688	RegAsm.exe	schtasks.exe
PID 2688 wrote to memory of 2504	2688	RegAsm.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\final bill copy 28.6.2020.exe
"C:\Users\Admin\AppData\Local\Temp\final bill copy 28.6.2020.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1984

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Program Files directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2688

C:\Windows\SysWOW64\schtasks.exe
"schtasks.exe" /create /f /tn "TCP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp2BD1.tmp"
3⤵
- Scheduled Task/Job: Scheduled Task
PID:2544

C:\Windows\SysWOW64\schtasks.exe
"schtasks.exe" /create /f /tn "TCP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp2C5F.tmp"
3⤵
- Scheduled Task/Job: Scheduled Task
PID:2504

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C choice /C Y /N /D Y /T 3 & Del "C:\Users\Admin\AppData\Local\Temp\final bill copy 28.6.2020.exe"
2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:2516

C:\Windows\SysWOW64\choice.exe
choice /C Y /N /D Y /T 3
3⤵
PID:2600

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp2BD1.tmp
Filesize
1KB

MD5
48ef7fa9033389ad7929d7a6b9d10298

SHA1
9db6cb7325c8bdf66a15f7b5f34703709a45aeb6

SHA256
0c1b5f67eeb276d1d4205b138ce32bc6149924e02281a2db8e4623a700e88f15

SHA512
ac8bd104ecbacc9bccce9e087f67e5b18072d59367ccd31d4e66132b6baaea520cba5b9b59464483d86abf74826b382c402f12e9a586c99bda8c78a0de33944e

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp2C5F.tmp
Filesize
1KB

MD5
4b7ef560289c0f62d0baf6f14f48a57a

SHA1
8331acb90dde588aa3196919f6e847f398fd06d1

SHA256
062844155306130d6fafc4fe10ac9e5ddd2ed462532b729c50cdc979c0d83207

SHA512
ecaa27c4b703d95f9f9b37d8c339982970482e7dab968c2010e0aa644bbfa31973111aafb827565af30c423d1d14e4ff997ec149614e713ff7ef3456894d02d8

Download Submit
memory/1984-8-0x0000000074500000-0x0000000074BEE000-memory.dmp

Filesize
6.9MB

Download
memory/1984-2-0x0000000000460000-0x00000000004A2000-memory.dmp

Filesize
264KB

Download
memory/1984-9-0x0000000074500000-0x0000000074BEE000-memory.dmp

Filesize
6.9MB

Download
memory/1984-0-0x000000007450E000-0x000000007450F000-memory.dmp

Filesize
4KB

Download
memory/1984-1-0x0000000000C40000-0x0000000000C98000-memory.dmp

Filesize
352KB

Download
memory/2688-7-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2688-5-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2688-3-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2688-17-0x0000000000540000-0x000000000054A000-memory.dmp

Filesize
40KB

Download
memory/2688-18-0x00000000005E0000-0x00000000005FE000-memory.dmp

Filesize
120KB

Download
memory/2688-19-0x0000000000550000-0x000000000055A000-memory.dmp

Filesize
40KB

Download