Malware Analysis Report

2024-08-06 14:44

Sample ID 240627-xj4ltavfle
Target wxipp.exe
SHA256 b89a70f1b581bb4807cb6a7c40146f0b28e2f1469c83bd019c1a37819da85a79
Tags
nanocore evasion trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

b89a70f1b581bb4807cb6a7c40146f0b28e2f1469c83bd019c1a37819da85a79

Threat Level: Known bad

The file wxipp.exe was found to be: Known bad.

Malicious Activity Summary

nanocore evasion trojan

Nanocore family

Checks whether UAC is enabled

Unsigned PE

Suspicious use of WriteProcessMemory

Scheduled Task/Job: Scheduled Task

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Scheduled Task/Job
T1053
Scheduled Task
T1053.005
Persistence
TA0003
Scheduled Task/Job
T1053
Scheduled Task
T1053.005
Privilege Escalation
TA0004
Scheduled Task/Job
T1053
Scheduled Task
T1053.005
Defense Evasion
TA0005
Credential Access
TA0006
Discovery
TA0007
System Information Discovery
T1082
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-27 18:53

Signatures

Nanocore family

nanocore

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-27 18:53

Reported

2024-06-27 18:55

Platform

win7-20240221-en

Max time kernel

66s

Max time network

70s

Command Line

"C:\Users\Admin\AppData\Local\Temp\wxipp.exe"

Signatures

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Users\Admin\AppData\Local\Temp\wxipp.exe N/A

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2216 wrote to memory of 2664 N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe C:\Windows\SysWOW64\schtasks.exe
PID 2216 wrote to memory of 2664 N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe C:\Windows\SysWOW64\schtasks.exe
PID 2216 wrote to memory of 2664 N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe C:\Windows\SysWOW64\schtasks.exe
PID 2216 wrote to memory of 2664 N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe C:\Windows\SysWOW64\schtasks.exe
PID 2216 wrote to memory of 1756 N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe C:\Windows\SysWOW64\schtasks.exe
PID 2216 wrote to memory of 1756 N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe C:\Windows\SysWOW64\schtasks.exe
PID 2216 wrote to memory of 1756 N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe C:\Windows\SysWOW64\schtasks.exe
PID 2216 wrote to memory of 1756 N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe C:\Windows\SysWOW64\schtasks.exe

Processes

C:\Users\Admin\AppData\Local\Temp\wxipp.exe

"C:\Users\Admin\AppData\Local\Temp\wxipp.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /delete /f /tn "Microsoft\Windows\Client Server Runtime Process"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "Microsoft\Windows\Client Server Runtime Process" /xml "C:\Users\Admin\AppData\Local\Temp\tmp15B2.tmp"

Network

Country Destination Domain Proto
US 8.8.8.8:53 thecat13.ddns.net udp
IN 49.206.41.30:40000 thecat13.ddns.net tcp
US 8.8.8.8:53 thecat13.ddns.net udp
IN 49.206.41.30:40000 thecat13.ddns.net tcp
US 8.8.8.8:53 thecat13.ddns.net udp
IN 49.206.41.30:40000 thecat13.ddns.net tcp
N/A 127.0.0.1:40000 tcp
N/A 127.0.0.1:40000 tcp
N/A 127.0.0.1:40000 tcp
US 8.8.8.8:53 thecat13.ddns.net udp
IN 49.206.41.30:40000 thecat13.ddns.net tcp

Files

memory/2216-0-0x0000000074631000-0x0000000074632000-memory.dmp

memory/2216-1-0x0000000074630000-0x0000000074BDB000-memory.dmp

memory/2216-2-0x0000000074630000-0x0000000074BDB000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp15B2.tmp

MD5 161a228bbffc66c3ecaff78b2ca5e6ba
SHA1 d9559ecf4ee35e58405b05f88759c705cdb2ac06
SHA256 e56a6fb81d329006e80a7fa324455ef08101450f62551d93c93b0079abc850a0
SHA512 61bcd916404f2feccf824845e93c9d9f6cdfae52785e50cc94217f87a2e3162a494ac5d29676b6322a80940614bf0aab922f124cccca7f23cc6fc1485a94e106

memory/2216-6-0x0000000074630000-0x0000000074BDB000-memory.dmp

memory/2216-7-0x0000000074630000-0x0000000074BDB000-memory.dmp

memory/2216-8-0x0000000074630000-0x0000000074BDB000-memory.dmp

memory/2216-9-0x0000000074630000-0x0000000074BDB000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-27 18:53

Reported

2024-06-27 18:56

Platform

win10v2004-20240611-en

Max time kernel

139s

Max time network

146s

Command Line

"C:\Users\Admin\AppData\Local\Temp\wxipp.exe"

Signatures

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Users\Admin\AppData\Local\Temp\wxipp.exe N/A

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1480 wrote to memory of 5028 N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe C:\Windows\SysWOW64\schtasks.exe
PID 1480 wrote to memory of 5028 N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe C:\Windows\SysWOW64\schtasks.exe
PID 1480 wrote to memory of 5028 N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe C:\Windows\SysWOW64\schtasks.exe
PID 1480 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe C:\Windows\SysWOW64\schtasks.exe
PID 1480 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe C:\Windows\SysWOW64\schtasks.exe
PID 1480 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\wxipp.exe C:\Windows\SysWOW64\schtasks.exe

Processes

C:\Users\Admin\AppData\Local\Temp\wxipp.exe

"C:\Users\Admin\AppData\Local\Temp\wxipp.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /delete /f /tn "Microsoft\Windows\Client Server Runtime Process"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "Microsoft\Windows\Client Server Runtime Process" /xml "C:\Users\Admin\AppData\Local\Temp\tmp3151.tmp"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 thecat13.ddns.net udp
IN 49.206.41.30:40000 thecat13.ddns.net tcp
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
BE 88.221.83.226:443 www.bing.com tcp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 80.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 226.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 thecat13.ddns.net udp
IN 49.206.41.30:40000 thecat13.ddns.net tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 thecat13.ddns.net udp
IN 49.206.41.30:40000 thecat13.ddns.net tcp
US 8.8.8.8:53 57.15.31.184.in-addr.arpa udp
N/A 127.0.0.1:40000 tcp
N/A 127.0.0.1:40000 tcp
N/A 127.0.0.1:40000 tcp
US 8.8.8.8:53 thecat13.ddns.net udp
IN 49.206.41.30:40000 thecat13.ddns.net tcp
US 8.8.8.8:53 thecat13.ddns.net udp
IN 49.206.41.30:40000 thecat13.ddns.net tcp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 thecat13.ddns.net udp
IN 49.206.41.30:40000 thecat13.ddns.net tcp
N/A 127.0.0.1:40000 tcp
N/A 127.0.0.1:40000 tcp
N/A 127.0.0.1:40000 tcp
US 8.8.8.8:53 thecat13.ddns.net udp
IN 49.206.41.30:40000 thecat13.ddns.net tcp

Files

memory/1480-0-0x0000000075492000-0x0000000075493000-memory.dmp

memory/1480-1-0x0000000075490000-0x0000000075A41000-memory.dmp

memory/1480-2-0x0000000075490000-0x0000000075A41000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp3151.tmp

MD5 161a228bbffc66c3ecaff78b2ca5e6ba
SHA1 d9559ecf4ee35e58405b05f88759c705cdb2ac06
SHA256 e56a6fb81d329006e80a7fa324455ef08101450f62551d93c93b0079abc850a0
SHA512 61bcd916404f2feccf824845e93c9d9f6cdfae52785e50cc94217f87a2e3162a494ac5d29676b6322a80940614bf0aab922f124cccca7f23cc6fc1485a94e106

memory/1480-6-0x0000000075490000-0x0000000075A41000-memory.dmp

memory/1480-7-0x0000000075492000-0x0000000075493000-memory.dmp

memory/1480-8-0x0000000075490000-0x0000000075A41000-memory.dmp

memory/1480-9-0x0000000075490000-0x0000000075A41000-memory.dmp