nanocore | 500993334540fe89b080d37fcfe6c1a46745e668232cca7f672925674b38761c

General

Target

CV_JOB REQUEST_Pdf.exe
Size

481KB
MD5

37aa5a40f887d4af4058ed721e3b400d
SHA1

299e38607281bf9502189155be9db77ee9b154ac
SHA256

500993334540fe89b080d37fcfe6c1a46745e668232cca7f672925674b38761c
SHA512

567c76deebdaca5084713af38050c77a4da9cd513a4841f0ad3a7e36697dde411ea9bf99d89ffcd6105dc72e50a7c8447e5fc0effa2a958e600304afc598db92

Score

10^/10

evasion trojan keylogger stealer spyware nanocore persistence

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

yaunywxb.ddns.net:2451

Mutex

928f4dff-7bc3-4b15-bdbf-4e7a61a704ea

Attributes

activate_away_mode
true
backup_connection_host
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-04-13T00:32:24.147747136Z
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
2451
default_group
MIMS NEW
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
928f4dff-7bc3-4b15-bdbf-4e7a61a704ea
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
yaunywxb.ddns.net
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

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1080 wrote to memory of 1340	1080	CV_JOB REQUEST_Pdf.exe	24
PID 1080 wrote to memory of 1340	1080	CV_JOB REQUEST_Pdf.exe	24
PID 1080 wrote to memory of 1340	1080	CV_JOB REQUEST_Pdf.exe	24
PID 1080 wrote to memory of 1340	1080	CV_JOB REQUEST_Pdf.exe	24
PID 1080 wrote to memory of 1340	1080	CV_JOB REQUEST_Pdf.exe	24
PID 1080 wrote to memory of 1340	1080	CV_JOB REQUEST_Pdf.exe	24
PID 1080 wrote to memory of 1340	1080	CV_JOB REQUEST_Pdf.exe	24
PID 1080 wrote to memory of 1340	1080	CV_JOB REQUEST_Pdf.exe	24
PID 1080 wrote to memory of 1340	1080	CV_JOB REQUEST_Pdf.exe	24
PID 1340 wrote to memory of 1472	1340	CV_JOB REQUEST_Pdf.exe	25
PID 1340 wrote to memory of 1472	1340	CV_JOB REQUEST_Pdf.exe	25
PID 1340 wrote to memory of 1472	1340	CV_JOB REQUEST_Pdf.exe	25
PID 1340 wrote to memory of 1472	1340	CV_JOB REQUEST_Pdf.exe	25
PID 1340 wrote to memory of 1616	1340	CV_JOB REQUEST_Pdf.exe	27
PID 1340 wrote to memory of 1616	1340	CV_JOB REQUEST_Pdf.exe	27
PID 1340 wrote to memory of 1616	1340	CV_JOB REQUEST_Pdf.exe	27
PID 1340 wrote to memory of 1616	1340	CV_JOB REQUEST_Pdf.exe	27

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1340	CV_JOB REQUEST_Pdf.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\WAN Subsystem\wanss.exe	CV_JOB REQUEST_Pdf.exe
File opened for modification	C:\Program Files (x86)\WAN Subsystem\wanss.exe	CV_JOB REQUEST_Pdf.exe

Adds Run entry to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\WAN Subsystem = "C:\\Program Files (x86)\\WAN Subsystem\\wanss.exe"	CV_JOB REQUEST_Pdf.exe

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

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

pid	Process
1472	schtasks.exe
1616	schtasks.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1080 set thread context of 1340	1080	CV_JOB REQUEST_Pdf.exe	24

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1340	CV_JOB REQUEST_Pdf.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1340	CV_JOB REQUEST_Pdf.exe
1340	CV_JOB REQUEST_Pdf.exe
1340	CV_JOB REQUEST_Pdf.exe
1340	CV_JOB REQUEST_Pdf.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	CV_JOB REQUEST_Pdf.exe

C:\Users\Admin\AppData\Local\Temp\CV_JOB REQUEST_Pdf.exe
"C:\Users\Admin\AppData\Local\Temp\CV_JOB REQUEST_Pdf.exe"
1⤵
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
PID:1080
- C:\Users\Admin\AppData\Local\Temp\CV_JOB REQUEST_Pdf.exe
  "{path}"
  2⤵
  - Suspicious use of WriteProcessMemory
  - Suspicious behavior: GetForegroundWindowSpam
  - Drops file in Program Files directory
  - Adds Run entry to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious behavior: EnumeratesProcesses
  - Checks whether UAC is enabled
  PID:1340
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "WAN Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp90D9.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:1472
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "WAN Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp9231.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:1616

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1340-0-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1340-2-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1340-3-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads