nanocore | ef5b4a828d4322e2ca5681423488e03e9991191809fc068d80ce0bbeba792984

General

Target

invoices-docs-view.exe
Size

439KB
MD5

a635c9a6dfa79affe8bf27cb4eae89d4
SHA1

b0d2e8f668085ef770757c5498ba84f506285381
SHA256

ef5b4a828d4322e2ca5681423488e03e9991191809fc068d80ce0bbeba792984
SHA512

81e0b8d0dab93e4f566bbdaeab2a10396a95c6826a45fc02f41cf19fbbb6a41a2d592762d58b37ad4dc23ee08ead77e9e60372f2d630057b5f94cb3997ae1d3a

Score

10^/10

nanocore coreentity evasion keylogger persistence rezer0 spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

79.134.225.89:12190

Mutex

4e4951f6-c9ee-4a8b-863c-f53c12df989f

Attributes

activate_away_mode
true
backup_connection_host
79.134.225.89
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-02-17T01:50:29.200734436Z
bypass_user_account_control
true
bypass_user_account_control_data
clear_access_control
true
clear_zone_identifier
false
connect_delay
4000
connection_port
12190
default_group
cpa
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
4e4951f6-c9ee-4a8b-863c-f53c12df989f
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
79.134.225.89
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

CoreEntity .NET Packer 1 IoCs

A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

coreentity

Processes:

resource	yara_rule
behavioral1/memory/344-7-0x0000000001E60000-0x0000000001E63000-memory.dmp	coreentity

NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
keylogger trojan stealer spyware nanocore

rezer0 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

Processes:

resource	yara_rule
behavioral1/memory/344-8-0x0000000004730000-0x000000000476A000-memory.dmp	rezer0

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

invoices-docs-view.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\WPA Host = "C:\\Program Files (x86)\\WPA Host\\wpahost.exe"	invoices-docs-view.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

invoices-docs-view.exe

description ioc process

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

Processes:

invoices-docs-view.exe

description pid process target process

PID 344 set thread context of 1116 344 invoices-docs-view.exe invoices-docs-view.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	invoices-docs-view.exe

description	pid	process	target process
PID 344 set thread context of 1116	344	invoices-docs-view.exe	invoices-docs-view.exe

Drops file in Program Files directory 2 IoCs

Processes:

invoices-docs-view.exe

description	ioc	process
File created	C:\Program Files (x86)\WPA Host\wpahost.exe	invoices-docs-view.exe
File opened for modification	C:\Program Files (x86)\WPA Host\wpahost.exe	invoices-docs-view.exe

Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

596 schtasks.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

invoices-docs-view.exeinvoices-docs-view.exe

pid process

344 invoices-docs-view.exe
1116 invoices-docs-view.exe
1116 invoices-docs-view.exe
1116 invoices-docs-view.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

invoices-docs-view.exe

pid process

1116 invoices-docs-view.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

invoices-docs-view.exeinvoices-docs-view.exe

description pid process

Token: SeDebugPrivilege 344 invoices-docs-view.exe
Token: SeDebugPrivilege 1116 invoices-docs-view.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

invoices-docs-view.exe

pid process

344 invoices-docs-view.exe
344 invoices-docs-view.exe

pid	process
596	schtasks.exe

pid	process
344	invoices-docs-view.exe
1116	invoices-docs-view.exe
1116	invoices-docs-view.exe
1116	invoices-docs-view.exe

pid	process
1116	invoices-docs-view.exe

description	pid	process
Token: SeDebugPrivilege	344	invoices-docs-view.exe
Token: SeDebugPrivilege	1116	invoices-docs-view.exe

pid	process
344	invoices-docs-view.exe
344	invoices-docs-view.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

invoices-docs-view.exe

description	pid	process	target process
PID 344 wrote to memory of 596	344	invoices-docs-view.exe	schtasks.exe
PID 344 wrote to memory of 596	344	invoices-docs-view.exe	schtasks.exe
PID 344 wrote to memory of 596	344	invoices-docs-view.exe	schtasks.exe
PID 344 wrote to memory of 596	344	invoices-docs-view.exe	schtasks.exe
PID 344 wrote to memory of 1116	344	invoices-docs-view.exe	invoices-docs-view.exe
PID 344 wrote to memory of 1116	344	invoices-docs-view.exe	invoices-docs-view.exe
PID 344 wrote to memory of 1116	344	invoices-docs-view.exe	invoices-docs-view.exe
PID 344 wrote to memory of 1116	344	invoices-docs-view.exe	invoices-docs-view.exe
PID 344 wrote to memory of 1116	344	invoices-docs-view.exe	invoices-docs-view.exe
PID 344 wrote to memory of 1116	344	invoices-docs-view.exe	invoices-docs-view.exe
PID 344 wrote to memory of 1116	344	invoices-docs-view.exe	invoices-docs-view.exe
PID 344 wrote to memory of 1116	344	invoices-docs-view.exe	invoices-docs-view.exe
PID 344 wrote to memory of 1116	344	invoices-docs-view.exe	invoices-docs-view.exe

C:\Users\Admin\AppData\Local\Temp\invoices-docs-view.exe
"C:\Users\Admin\AppData\Local\Temp\invoices-docs-view.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:344

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\IHVeunQQvXE" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4192.tmp"
2⤵
- Creates scheduled task(s)
PID:596

C:\Users\Admin\AppData\Local\Temp\invoices-docs-view.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
PID:1116

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

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp4192.tmp
MD5
4c04e06b6449c1cc6ceff060fdfc98de

SHA1
7bb9d719a81ccac642a2924a7a8bb204a5abe397

SHA256
5f582b2963f427f69881997296a8d122debf775a45ee89c7edf300eba9370731

SHA512
0e964906b687999b0549b6a82d403171bfb2574a5c73be978b342e66e6e07b9f6069c0883e4522cfc3d06d3d058aebaf8fa66fd849e155829a900fb3da8c888f

Download Submit
memory/344-1-0x00000000001F0000-0x00000000001F1000-memory.dmp

Filesize
4KB

Download
memory/344-3-0x00000000007D0000-0x0000000000812000-memory.dmp

Filesize
264KB

Download
memory/344-4-0x0000000001F30000-0x0000000001F41000-memory.dmp

Filesize
68KB

Download
memory/344-0-0x0000000073FF0000-0x00000000746DE000-memory.dmp

Filesize
6.9MB

Download
memory/344-7-0x0000000001E60000-0x0000000001E63000-memory.dmp

Filesize
12KB

Download
memory/344-8-0x0000000004730000-0x000000000476A000-memory.dmp

Filesize
232KB

Download
memory/596-9-0x0000000000000000-mapping.dmp

Download
memory/1116-14-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1116-11-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1116-12-0x000000000041E792-mapping.dmp

Download
memory/1116-13-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1116-15-0x0000000073FF0000-0x00000000746DE000-memory.dmp

Filesize
6.9MB

Download
memory/1116-18-0x0000000000500000-0x0000000000505000-memory.dmp

Filesize
20KB

Download
memory/1116-19-0x0000000000510000-0x0000000000529000-memory.dmp

Filesize
100KB

Download
memory/1116-20-0x0000000000570000-0x0000000000573000-memory.dmp

Filesize
12KB

Download
memory/1220-6-0x000007FEF7590000-0x000007FEF780A000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads