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 1 IoCs

Processes:

RegAsm.exe

pid process

1128 RegAsm.exe
Loads dropped DLL 2 IoCs

Processes:

Paidcheck.pdf.exeRegAsm.exe

pid process

1816 Paidcheck.pdf.exe
1128 RegAsm.exe

pid	process
1128	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\LAN Host = "C:\\Program Files (x86)\\LAN Host\\lanhost.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 1816 set thread context of 1128 1816 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 1816 set thread context of 1128	1816	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)\LAN Host\lanhost.exe	RegAsm.exe
File opened for modification	C:\Program Files (x86)\LAN Host\lanhost.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

612 schtasks.exe
1964 schtasks.exe

pid	process
612	schtasks.exe
1964	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

Paidcheck.pdf.exepowershell.exeRegAsm.exe

pid	process
1816	Paidcheck.pdf.exe
1816	Paidcheck.pdf.exe
1752	powershell.exe
1128	RegAsm.exe
1128	RegAsm.exe
1128	RegAsm.exe
1752	powershell.exe
1128	RegAsm.exe
1128	RegAsm.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

RegAsm.exe

pid process

1128 RegAsm.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Paidcheck.pdf.exepowershell.exeRegAsm.exe

description pid process

Token: SeDebugPrivilege 1816 Paidcheck.pdf.exe
Token: SeDebugPrivilege 1752 powershell.exe
Token: SeDebugPrivilege 1128 RegAsm.exe

pid	process
1128	RegAsm.exe

description	pid	process
Token: SeDebugPrivilege	1816	Paidcheck.pdf.exe
Token: SeDebugPrivilege	1752	powershell.exe
Token: SeDebugPrivilege	1128	RegAsm.exe

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

Paidcheck.pdf.exeWScript.exeRegAsm.exe

description	pid	process	target process
PID 1816 wrote to memory of 1216	1816	Paidcheck.pdf.exe	WScript.exe
PID 1816 wrote to memory of 1216	1816	Paidcheck.pdf.exe	WScript.exe
PID 1816 wrote to memory of 1216	1816	Paidcheck.pdf.exe	WScript.exe
PID 1816 wrote to memory of 1216	1816	Paidcheck.pdf.exe	WScript.exe
PID 1816 wrote to memory of 1128	1816	Paidcheck.pdf.exe	RegAsm.exe
PID 1816 wrote to memory of 1128	1816	Paidcheck.pdf.exe	RegAsm.exe
PID 1816 wrote to memory of 1128	1816	Paidcheck.pdf.exe	RegAsm.exe
PID 1816 wrote to memory of 1128	1816	Paidcheck.pdf.exe	RegAsm.exe
PID 1816 wrote to memory of 1128	1816	Paidcheck.pdf.exe	RegAsm.exe
PID 1816 wrote to memory of 1128	1816	Paidcheck.pdf.exe	RegAsm.exe
PID 1816 wrote to memory of 1128	1816	Paidcheck.pdf.exe	RegAsm.exe
PID 1816 wrote to memory of 1128	1816	Paidcheck.pdf.exe	RegAsm.exe
PID 1816 wrote to memory of 1128	1816	Paidcheck.pdf.exe	RegAsm.exe
PID 1816 wrote to memory of 1128	1816	Paidcheck.pdf.exe	RegAsm.exe
PID 1816 wrote to memory of 1128	1816	Paidcheck.pdf.exe	RegAsm.exe
PID 1816 wrote to memory of 1128	1816	Paidcheck.pdf.exe	RegAsm.exe
PID 1216 wrote to memory of 1752	1216	WScript.exe	powershell.exe
PID 1216 wrote to memory of 1752	1216	WScript.exe	powershell.exe
PID 1216 wrote to memory of 1752	1216	WScript.exe	powershell.exe
PID 1216 wrote to memory of 1752	1216	WScript.exe	powershell.exe
PID 1128 wrote to memory of 612	1128	RegAsm.exe	schtasks.exe
PID 1128 wrote to memory of 612	1128	RegAsm.exe	schtasks.exe
PID 1128 wrote to memory of 612	1128	RegAsm.exe	schtasks.exe
PID 1128 wrote to memory of 612	1128	RegAsm.exe	schtasks.exe
PID 1128 wrote to memory of 1964	1128	RegAsm.exe	schtasks.exe
PID 1128 wrote to memory of 1964	1128	RegAsm.exe	schtasks.exe
PID 1128 wrote to memory of 1964	1128	RegAsm.exe	schtasks.exe
PID 1128 wrote to memory of 1964	1128	RegAsm.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\Paidcheck.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Paidcheck.pdf.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1816

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\_Fimmlfqfvyftboxhdsnydr.vbs"
2⤵
- Suspicious use of WriteProcessMemory
PID:1216

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:1752

C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
2⤵
- Executes dropped EXE
- Loads dropped DLL
- 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:1128

C:\Windows\SysWOW64\schtasks.exe
"schtasks.exe" /create /f /tn "LAN Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmp98E5.tmp"
3⤵
- Creates scheduled task(s)
PID:612

C:\Windows\SysWOW64\schtasks.exe
"schtasks.exe" /create /f /tn "LAN Host Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp99D0.tmp"
3⤵
- Creates scheduled task(s)
PID:1964

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\_Fimmlfqfvyftboxhdsnydr.vbs
MD5
dea2f8a74097b28b02ebe1203cda7dd9

SHA1
ddff48c4ef021b9938b39e45a75344db9c6e3a21

SHA256
a63665a894a0fba12b5771f14e2fa28c49108b0ced2b1c4787d68ebe8651aa73

SHA512
2d28d0a6b993210e07d1bf6add080ed17000eac39173cfc41fb22e1d69c0f0031263dff45330b1940931a03c3da8478e5bdcd8d245a90f2fb7cee6a552d55db3

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp98E5.tmp
MD5
4cd7da0133ff64f40216341d95fe30bb

SHA1
88146cfd7754b988f50e929d876f33dc9916758f

SHA256
37cce77e24a3c3d5ab28c16f726ef6a62c553acd972e256927f69064c4e1cfde

SHA512
fa5b84f207fd9f20b2eace6cda9124e9d718fc80dc0a5fab31507f372d15ba69e1098a26e2e7036ba559ca52a99cfd804ca99ba68bda0a60386a33197722df8f

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp99D0.tmp
MD5
54865f98871478b2b88b7f8aa6100915

SHA1
6f8667f1ce25cebee2a7b460668736ff6bcfac54

SHA256
287f7b4372926ff59bb9a14bdfc00ad63f92af8efdb2e14f6f6baf31878fd44e

SHA512
caba0bd0cb0eda0710291f9754cfdef1a3d8fdb8b6d07f5d3e4d1e7b09c87f37032287ddef0a75485d6e685afa3510ee64453662e6c8d223ae171b392b58e493

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

SHA1
d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

SHA256
6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

SHA512
b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

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

SHA1
d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

SHA256
6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

SHA512
b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

Download Submit
memory/612-84-0x0000000000000000-mapping.dmp

Download
memory/1128-90-0x0000000000540000-0x0000000000559000-memory.dmp

Filesize
100KB

Download
memory/1128-136-0x0000000000D20000-0x0000000000D29000-memory.dmp

Filesize
36KB

Download
memory/1128-74-0x000000000041E792-mapping.dmp

Download
memory/1128-130-0x00000000009C0000-0x00000000009D5000-memory.dmp

Filesize
84KB

Download
memory/1128-131-0x0000000000A40000-0x0000000000A46000-memory.dmp

Filesize
24KB

Download
memory/1128-139-0x0000000000DF0000-0x0000000000E19000-memory.dmp

Filesize
164KB

Download
memory/1128-80-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1128-138-0x0000000000D40000-0x0000000000D4A000-memory.dmp

Filesize
40KB

Download
memory/1128-137-0x0000000000D30000-0x0000000000D3F000-memory.dmp

Filesize
60KB

Download
memory/1128-129-0x00000000009B0000-0x00000000009BD000-memory.dmp

Filesize
52KB

Download
memory/1128-73-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1128-134-0x0000000000B80000-0x0000000000B86000-memory.dmp

Filesize
24KB

Download
memory/1128-135-0x0000000000BD0000-0x0000000000BDD000-memory.dmp

Filesize
52KB

Download
memory/1128-89-0x00000000002F0000-0x00000000002F5000-memory.dmp

Filesize
20KB

Download
memory/1128-133-0x0000000000B70000-0x0000000000B77000-memory.dmp

Filesize
28KB

Download
memory/1128-92-0x0000000000570000-0x0000000000571000-memory.dmp

Filesize
4KB

Download
memory/1128-132-0x0000000000A50000-0x0000000000A5C000-memory.dmp

Filesize
48KB

Download
memory/1128-91-0x0000000000560000-0x0000000000563000-memory.dmp

Filesize
12KB

Download
memory/1216-69-0x0000000000000000-mapping.dmp

Download
memory/1216-72-0x0000000075EF1000-0x0000000075EF3000-memory.dmp

Filesize
8KB

Download
memory/1752-86-0x0000000004780000-0x0000000004781000-memory.dmp

Filesize
4KB

Download
memory/1752-95-0x0000000005240000-0x0000000005241000-memory.dmp

Filesize
4KB

Download
memory/1752-104-0x00000000060B0000-0x00000000060B1000-memory.dmp

Filesize
4KB

Download
memory/1752-111-0x0000000006240000-0x0000000006241000-memory.dmp

Filesize
4KB

Download
memory/1752-112-0x000000007EF30000-0x000000007EF31000-memory.dmp

Filesize
4KB

Download
memory/1752-113-0x00000000055E0000-0x00000000055E1000-memory.dmp

Filesize
4KB

Download
memory/1752-127-0x0000000006300000-0x0000000006301000-memory.dmp

Filesize
4KB

Download
memory/1752-128-0x0000000006310000-0x0000000006311000-memory.dmp

Filesize
4KB

Download
memory/1752-98-0x0000000005620000-0x0000000005621000-memory.dmp

Filesize
4KB

Download
memory/1752-103-0x0000000006060000-0x0000000006061000-memory.dmp

Filesize
4KB

Download
memory/1752-94-0x0000000002460000-0x0000000002461000-memory.dmp

Filesize
4KB

Download
memory/1752-93-0x0000000002140000-0x0000000002D8A000-memory.dmp

Filesize
12.3MB

Download
memory/1752-79-0x0000000000000000-mapping.dmp

Download
memory/1752-83-0x00000000007F0000-0x00000000007F1000-memory.dmp

Filesize
4KB

Download
memory/1816-63-0x0000000000D20000-0x0000000000D82000-memory.dmp

Filesize
392KB

Download
memory/1816-68-0x0000000005030000-0x0000000005097000-memory.dmp

Filesize
412KB

Download
memory/1816-62-0x0000000004B80000-0x0000000004B81000-memory.dmp

Filesize
4KB

Download
memory/1816-60-0x0000000000DD0000-0x0000000000DD1000-memory.dmp

Filesize
4KB

Download
memory/1964-87-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads