nanocore | 7e22f7f21e8798805234be7ac26bad65c1edecb55b051343e0933a68041ce073

General

Target

Paidcheck.pdf.exe
Size

566KB
MD5

ce32e8605adb6c9bb2dcee69fe887b46
SHA1

2ace1fb1e3523768003b61a4a79193214ffafed9
SHA256

7e22f7f21e8798805234be7ac26bad65c1edecb55b051343e0933a68041ce073
SHA512

674ad1360e6ed0e1c77865858c08950d6955f8a56544343e9414320470d80258e4fad0d67ee64423cbc792bfbf2cd6fee2c1806a837b61f62b7f71c10fe2d9fc

Score

10^/10

nanocore evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

217.138.212.57:2018

annapro.linkpc.net:2018

Mutex

bcd083ef-bf90-4541-bf76-579f377e7cee

Attributes

activate_away_mode
true
backup_connection_host
annapro.linkpc.net
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2021-04-30T06:57:40.163177036Z
bypass_user_account_control
false
bypass_user_account_control_data
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
clear_access_control
true
clear_zone_identifier
true
connect_delay
4000
connection_port
2018
default_group
5g
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
bcd083ef-bf90-4541-bf76-579f377e7cee
mutex_timeout
5000
prevent_system_sleep
true
primary_connection_host
217.138.212.57
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
Executes dropped EXE 2 IoCs

Processes:

RegAsm.exeRegAsm.exe

pid process

860 RegAsm.exe
3860 RegAsm.exe

pid	process
860	RegAsm.exe
3860	RegAsm.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

RegAsm.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\UPNP Subsystem = "C:\\Program Files (x86)\\UPNP Subsystem\\upnpss.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:

Paidcheck.pdf.exe

description pid process target process

PID 656 set thread context of 3860 656 Paidcheck.pdf.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 656 set thread context of 3860	656	Paidcheck.pdf.exe	RegAsm.exe

Drops file in Program Files directory 2 IoCs

Processes:

RegAsm.exe

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

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

System Information Discovery
T1082
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

Processes:

schtasks.exeschtasks.exe

pid process

2168 schtasks.exe
2016 schtasks.exe
Modifies registry class 1 IoCs

Processes:

Paidcheck.pdf.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000_Classes\Local Settings Paidcheck.pdf.exe

pid	process
2168	schtasks.exe
2016	schtasks.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000_Classes\Local Settings	Paidcheck.pdf.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

Processes:

Paidcheck.pdf.exepowershell.exeRegAsm.exe

pid	process
656	Paidcheck.pdf.exe
656	Paidcheck.pdf.exe
656	Paidcheck.pdf.exe
656	Paidcheck.pdf.exe
656	Paidcheck.pdf.exe
656	Paidcheck.pdf.exe
2308	powershell.exe
2308	powershell.exe
3860	RegAsm.exe
3860	RegAsm.exe
3860	RegAsm.exe
2308	powershell.exe
3860	RegAsm.exe
3860	RegAsm.exe
3860	RegAsm.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

RegAsm.exe

pid process

3860 RegAsm.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Paidcheck.pdf.exepowershell.exeRegAsm.exe

description pid process

Token: SeDebugPrivilege 656 Paidcheck.pdf.exe
Token: SeDebugPrivilege 2308 powershell.exe
Token: SeDebugPrivilege 3860 RegAsm.exe

pid	process
3860	RegAsm.exe

description	pid	process
Token: SeDebugPrivilege	656	Paidcheck.pdf.exe
Token: SeDebugPrivilege	2308	powershell.exe
Token: SeDebugPrivilege	3860	RegAsm.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

Paidcheck.pdf.exeWScript.exeRegAsm.exe

description	pid	process	target process
PID 656 wrote to memory of 2124	656	Paidcheck.pdf.exe	WScript.exe
PID 656 wrote to memory of 2124	656	Paidcheck.pdf.exe	WScript.exe
PID 656 wrote to memory of 2124	656	Paidcheck.pdf.exe	WScript.exe
PID 656 wrote to memory of 860	656	Paidcheck.pdf.exe	RegAsm.exe
PID 656 wrote to memory of 860	656	Paidcheck.pdf.exe	RegAsm.exe
PID 656 wrote to memory of 860	656	Paidcheck.pdf.exe	RegAsm.exe
PID 656 wrote to memory of 3860	656	Paidcheck.pdf.exe	RegAsm.exe
PID 656 wrote to memory of 3860	656	Paidcheck.pdf.exe	RegAsm.exe
PID 656 wrote to memory of 3860	656	Paidcheck.pdf.exe	RegAsm.exe
PID 656 wrote to memory of 3860	656	Paidcheck.pdf.exe	RegAsm.exe
PID 656 wrote to memory of 3860	656	Paidcheck.pdf.exe	RegAsm.exe
PID 656 wrote to memory of 3860	656	Paidcheck.pdf.exe	RegAsm.exe
PID 656 wrote to memory of 3860	656	Paidcheck.pdf.exe	RegAsm.exe
PID 656 wrote to memory of 3860	656	Paidcheck.pdf.exe	RegAsm.exe
PID 2124 wrote to memory of 2308	2124	WScript.exe	powershell.exe
PID 2124 wrote to memory of 2308	2124	WScript.exe	powershell.exe
PID 2124 wrote to memory of 2308	2124	WScript.exe	powershell.exe
PID 3860 wrote to memory of 2168	3860	RegAsm.exe	schtasks.exe
PID 3860 wrote to memory of 2168	3860	RegAsm.exe	schtasks.exe
PID 3860 wrote to memory of 2168	3860	RegAsm.exe	schtasks.exe
PID 3860 wrote to memory of 2016	3860	RegAsm.exe	schtasks.exe
PID 3860 wrote to memory of 2016	3860	RegAsm.exe	schtasks.exe
PID 3860 wrote to memory of 2016	3860	RegAsm.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\Paidcheck.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Paidcheck.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:656

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\_Fimmlfqfvyftboxhdsnydr.vbs"
2⤵
- Suspicious use of WriteProcessMemory
PID:2124

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionPath C:\,'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\dwrn\explorerr.exe'
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2308

C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
2⤵
- Executes dropped EXE
PID:860

C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
2⤵
- Executes dropped EXE
- 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:3860

C:\Windows\SysWOW64\schtasks.exe
"schtasks.exe" /create /f /tn "UPNP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp69E6.tmp"
3⤵
- Creates scheduled task(s)
PID:2168

C:\Windows\SysWOW64\schtasks.exe
"schtasks.exe" /create /f /tn "UPNP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp6AA3.tmp"
3⤵
- Creates scheduled task(s)
PID:2016

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
MD5
b58b926c3574d28d5b7fdd2ca3ec30d5

SHA1
d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

SHA256
6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

SHA512
b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

Download Submit
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
MD5
b58b926c3574d28d5b7fdd2ca3ec30d5

SHA1
d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

SHA256
6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

SHA512
b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

Download Submit
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
MD5
b58b926c3574d28d5b7fdd2ca3ec30d5

SHA1
d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

SHA256
6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

SHA512
b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

Download Submit
C:\Users\Admin\AppData\Local\Temp\_Fimmlfqfvyftboxhdsnydr.vbs
MD5
dea2f8a74097b28b02ebe1203cda7dd9

SHA1
ddff48c4ef021b9938b39e45a75344db9c6e3a21

SHA256
a63665a894a0fba12b5771f14e2fa28c49108b0ced2b1c4787d68ebe8651aa73

SHA512
2d28d0a6b993210e07d1bf6add080ed17000eac39173cfc41fb22e1d69c0f0031263dff45330b1940931a03c3da8478e5bdcd8d245a90f2fb7cee6a552d55db3

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp69E6.tmp
MD5
4cd7da0133ff64f40216341d95fe30bb

SHA1
88146cfd7754b988f50e929d876f33dc9916758f

SHA256
37cce77e24a3c3d5ab28c16f726ef6a62c553acd972e256927f69064c4e1cfde

SHA512
fa5b84f207fd9f20b2eace6cda9124e9d718fc80dc0a5fab31507f372d15ba69e1098a26e2e7036ba559ca52a99cfd804ca99ba68bda0a60386a33197722df8f

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp6AA3.tmp
MD5
af9986f5e128fd8bd3ae748fcba6576d

SHA1
8060072c35108b48649a03be91803b97f1ad40a4

SHA256
f3242f6480b3d1a8f9285135fdce9a201c4802ce062eee4fb41c488a21d53303

SHA512
f35c8e1699905bc972ae48a5a4a9fd33ea04b2d851ffc1cb1d1573a2087121d803b4186a696b2edad10a9c46c388a478e105f5a730020b598aa9f483086dba38

Download Submit
memory/656-118-0x00000000050D0000-0x00000000055CE000-memory.dmp

Filesize
5.0MB

Download
memory/656-125-0x00000000078E0000-0x0000000007947000-memory.dmp

Filesize
412KB

Download
memory/656-120-0x0000000007530000-0x0000000007592000-memory.dmp

Filesize
392KB

Download
memory/656-119-0x00000000052F0000-0x00000000052F1000-memory.dmp

Filesize
4KB

Download
memory/656-114-0x00000000008C0000-0x00000000008C1000-memory.dmp

Filesize
4KB

Download
memory/656-117-0x0000000005190000-0x0000000005191000-memory.dmp

Filesize
4KB

Download
memory/656-116-0x00000000055D0000-0x00000000055D1000-memory.dmp

Filesize
4KB

Download
memory/2016-153-0x0000000000000000-mapping.dmp

Download
memory/2124-126-0x0000000000000000-mapping.dmp

Download
memory/2168-150-0x0000000000000000-mapping.dmp

Download
memory/2308-160-0x0000000008250000-0x0000000008251000-memory.dmp

Filesize
4KB

Download
memory/2308-151-0x0000000007B50000-0x0000000007B51000-memory.dmp

Filesize
4KB

Download
memory/2308-144-0x0000000001240000-0x0000000001241000-memory.dmp

Filesize
4KB

Download
memory/2308-146-0x0000000007160000-0x0000000007161000-memory.dmp

Filesize
4KB

Download
memory/2308-145-0x0000000001242000-0x0000000001243000-memory.dmp

Filesize
4KB

Download
memory/2308-133-0x0000000000000000-mapping.dmp

Download
memory/2308-148-0x0000000007830000-0x0000000007831000-memory.dmp

Filesize
4KB

Download
memory/2308-149-0x00000000078A0000-0x00000000078A1000-memory.dmp

Filesize
4KB

Download
memory/2308-141-0x0000000004740000-0x0000000004741000-memory.dmp

Filesize
4KB

Download
memory/2308-176-0x0000000008F80000-0x0000000008F81000-memory.dmp

Filesize
4KB

Download
memory/2308-168-0x0000000008FA0000-0x0000000008FD3000-memory.dmp

Filesize
204KB

Download
memory/2308-382-0x0000000006D90000-0x0000000006D91000-memory.dmp

Filesize
4KB

Download
memory/2308-376-0x0000000006DA0000-0x0000000006DA1000-memory.dmp

Filesize
4KB

Download
memory/2308-170-0x000000007ED50000-0x000000007ED51000-memory.dmp

Filesize
4KB

Download
memory/2308-237-0x0000000001243000-0x0000000001244000-memory.dmp

Filesize
4KB

Download
memory/2308-182-0x00000000094C0000-0x00000000094C1000-memory.dmp

Filesize
4KB

Download
memory/2308-158-0x0000000007A80000-0x0000000007A81000-memory.dmp

Filesize
4KB

Download
memory/2308-159-0x0000000007F60000-0x0000000007F61000-memory.dmp

Filesize
4KB

Download
memory/2308-181-0x0000000009300000-0x0000000009301000-memory.dmp

Filesize
4KB

Download
memory/2308-142-0x0000000007190000-0x0000000007191000-memory.dmp

Filesize
4KB

Download
memory/3860-403-0x0000000006550000-0x000000000655D000-memory.dmp

Filesize
52KB

Download
memory/3860-155-0x0000000004F10000-0x0000000004F15000-memory.dmp

Filesize
20KB

Download
memory/3860-407-0x00000000065A0000-0x00000000065C9000-memory.dmp

Filesize
164KB

Download
memory/3860-157-0x0000000005D60000-0x0000000005D63000-memory.dmp

Filesize
12KB

Download
memory/3860-156-0x0000000005C30000-0x0000000005C49000-memory.dmp

Filesize
100KB

Download
memory/3860-140-0x0000000004DF0000-0x0000000004DF1000-memory.dmp

Filesize
4KB

Download
memory/3860-129-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3860-397-0x0000000005D70000-0x0000000005D7D000-memory.dmp

Filesize
52KB

Download
memory/3860-398-0x00000000064D0000-0x00000000064E5000-memory.dmp

Filesize
84KB

Download
memory/3860-399-0x0000000006510000-0x0000000006516000-memory.dmp

Filesize
24KB

Download
memory/3860-400-0x0000000006520000-0x000000000652C000-memory.dmp

Filesize
48KB

Download
memory/3860-401-0x0000000006530000-0x0000000006537000-memory.dmp

Filesize
28KB

Download
memory/3860-402-0x0000000006540000-0x0000000006546000-memory.dmp

Filesize
24KB

Download
memory/3860-130-0x000000000041E792-mapping.dmp

Download
memory/3860-404-0x0000000006560000-0x0000000006569000-memory.dmp

Filesize
36KB

Download
memory/3860-405-0x0000000006570000-0x000000000657F000-memory.dmp

Filesize
60KB

Download
memory/3860-406-0x0000000006590000-0x000000000659A000-memory.dmp

Filesize
40KB

Download
memory/3860-147-0x0000000004C70000-0x000000000516E000-memory.dmp

Filesize
5.0MB

Download
memory/3860-408-0x00000000065E0000-0x00000000065EF000-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads