Malware Analysis Report

2024-08-06 14:45

Sample ID 240623-qjxpya1hnc
Target skid.exe
SHA256 1929f090046f4af22edd3ad430212bd054015cef995ce911ef7d61119452cd2b
Tags
nanocore evasion keylogger persistence spyware stealer 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

1929f090046f4af22edd3ad430212bd054015cef995ce911ef7d61119452cd2b

Threat Level: Known bad

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

Malicious Activity Summary

nanocore evasion keylogger persistence spyware stealer trojan

NanoCore

Nanocore family

Adds Run key to start application

Checks whether UAC is enabled

Drops file in Program Files directory

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Scheduled Task/Job: Scheduled Task

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
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Scheduled Task/Job
T1053
Scheduled Task
T1053.005
Privilege Escalation
TA0004
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Scheduled Task/Job
T1053
Scheduled Task
T1053.005
Defense Evasion
TA0005
Modify Registry
T1112
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

2024-06-23 13:18

Signatures

Nanocore family

nanocore

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-23 13:18

Reported

2024-06-23 13:20

Platform

win7-20240220-en

Max time kernel

147s

Max time network

150s

Command Line

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

Signatures

NanoCore

keylogger trojan stealer spyware nanocore

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\TCP Subsystem = "C:\\Program Files (x86)\\TCP Subsystem\\tcpss.exe" C:\Users\Admin\AppData\Local\Temp\skid.exe N/A

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\skid.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\TCP Subsystem\tcpss.exe C:\Users\Admin\AppData\Local\Temp\skid.exe N/A
File created C:\Program Files (x86)\TCP Subsystem\tcpss.exe C:\Users\Admin\AppData\Local\Temp\skid.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
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\skid.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\skid.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\skid.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\skid.exe N/A

Suspicious behavior: GetForegroundWindowSpam

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2280 wrote to memory of 2480 N/A C:\Users\Admin\AppData\Local\Temp\skid.exe C:\Windows\SysWOW64\schtasks.exe
PID 2280 wrote to memory of 2480 N/A C:\Users\Admin\AppData\Local\Temp\skid.exe C:\Windows\SysWOW64\schtasks.exe
PID 2280 wrote to memory of 2480 N/A C:\Users\Admin\AppData\Local\Temp\skid.exe C:\Windows\SysWOW64\schtasks.exe
PID 2280 wrote to memory of 2480 N/A C:\Users\Admin\AppData\Local\Temp\skid.exe C:\Windows\SysWOW64\schtasks.exe
PID 2280 wrote to memory of 2624 N/A C:\Users\Admin\AppData\Local\Temp\skid.exe C:\Windows\SysWOW64\schtasks.exe
PID 2280 wrote to memory of 2624 N/A C:\Users\Admin\AppData\Local\Temp\skid.exe C:\Windows\SysWOW64\schtasks.exe
PID 2280 wrote to memory of 2624 N/A C:\Users\Admin\AppData\Local\Temp\skid.exe C:\Windows\SysWOW64\schtasks.exe
PID 2280 wrote to memory of 2624 N/A C:\Users\Admin\AppData\Local\Temp\skid.exe C:\Windows\SysWOW64\schtasks.exe

Processes

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

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

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "TCP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmpFF46.tmp"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "TCP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpFFD3.tmp"

Network

Country Destination Domain Proto
US 8.8.8.8:53 care-somewhere.gl.at.ply.gg udp
US 147.185.221.20:1608 care-somewhere.gl.at.ply.gg tcp
US 147.185.221.20:1608 care-somewhere.gl.at.ply.gg tcp
US 147.185.221.20:1608 care-somewhere.gl.at.ply.gg tcp
N/A 127.0.0.1:1608 tcp
N/A 127.0.0.1:1608 tcp
N/A 127.0.0.1:1608 tcp
US 147.185.221.20:1608 care-somewhere.gl.at.ply.gg tcp
US 147.185.221.20:1608 care-somewhere.gl.at.ply.gg tcp
US 147.185.221.20:1608 care-somewhere.gl.at.ply.gg tcp
N/A 127.0.0.1:1608 tcp
N/A 127.0.0.1:1608 tcp
N/A 127.0.0.1:1608 tcp
US 147.185.221.20:1608 care-somewhere.gl.at.ply.gg tcp
US 147.185.221.20:1608 care-somewhere.gl.at.ply.gg tcp

Files

memory/2280-0-0x0000000074571000-0x0000000074572000-memory.dmp

memory/2280-1-0x0000000074570000-0x0000000074B1B000-memory.dmp

memory/2280-2-0x0000000074570000-0x0000000074B1B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpFF46.tmp

MD5 d03c4f78287a8c2ba11b867d222f3592
SHA1 bb1f39da40cff5636a67833a90114093394acd52
SHA256 aaef2431c0a7c272ddef710c8b25aea6afda0aaa2a9b06419b9ee5168d91bf35
SHA512 e49c5390cdf50432514974542fa0e10872b67bc69c2119174ecbac0b0fa6fd7d3d7ce179e9a47e51681dece3cffd0d6b9d11d2aa106a8e3a1aaf7252455e53ae

C:\Users\Admin\AppData\Local\Temp\tmpFFD3.tmp

MD5 4b7ef560289c0f62d0baf6f14f48a57a
SHA1 8331acb90dde588aa3196919f6e847f398fd06d1
SHA256 062844155306130d6fafc4fe10ac9e5ddd2ed462532b729c50cdc979c0d83207
SHA512 ecaa27c4b703d95f9f9b37d8c339982970482e7dab968c2010e0aa644bbfa31973111aafb827565af30c423d1d14e4ff997ec149614e713ff7ef3456894d02d8

memory/2280-10-0x0000000074570000-0x0000000074B1B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-23 13:18

Reported

2024-06-23 13:20

Platform

win10v2004-20240611-en

Max time kernel

149s

Max time network

149s

Command Line

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

Signatures

NanoCore

keylogger trojan stealer spyware nanocore

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\DHCP Service = "C:\\Program Files (x86)\\DHCP Service\\dhcpsv.exe" C:\Users\Admin\AppData\Local\Temp\skid.exe N/A

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\skid.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\DHCP Service\dhcpsv.exe C:\Users\Admin\AppData\Local\Temp\skid.exe N/A
File opened for modification C:\Program Files (x86)\DHCP Service\dhcpsv.exe C:\Users\Admin\AppData\Local\Temp\skid.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
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\skid.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\skid.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\skid.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\skid.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\skid.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\skid.exe N/A

Suspicious behavior: GetForegroundWindowSpam

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1836 wrote to memory of 2372 N/A C:\Users\Admin\AppData\Local\Temp\skid.exe C:\Windows\SysWOW64\schtasks.exe
PID 1836 wrote to memory of 2372 N/A C:\Users\Admin\AppData\Local\Temp\skid.exe C:\Windows\SysWOW64\schtasks.exe
PID 1836 wrote to memory of 2372 N/A C:\Users\Admin\AppData\Local\Temp\skid.exe C:\Windows\SysWOW64\schtasks.exe
PID 1836 wrote to memory of 4144 N/A C:\Users\Admin\AppData\Local\Temp\skid.exe C:\Windows\SysWOW64\schtasks.exe
PID 1836 wrote to memory of 4144 N/A C:\Users\Admin\AppData\Local\Temp\skid.exe C:\Windows\SysWOW64\schtasks.exe
PID 1836 wrote to memory of 4144 N/A C:\Users\Admin\AppData\Local\Temp\skid.exe C:\Windows\SysWOW64\schtasks.exe

Processes

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

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

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "DHCP Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp395F.tmp"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "DHCP Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp39AE.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 care-somewhere.gl.at.ply.gg udp
US 147.185.221.20:1608 care-somewhere.gl.at.ply.gg tcp
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 25.24.18.2.in-addr.arpa udp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
NL 23.62.61.194:443 www.bing.com tcp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 194.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 147.185.221.20:1608 care-somewhere.gl.at.ply.gg tcp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 32.251.17.2.in-addr.arpa udp
US 147.185.221.20:1608 care-somewhere.gl.at.ply.gg tcp
N/A 127.0.0.1:1608 tcp
N/A 127.0.0.1:1608 tcp
N/A 127.0.0.1:1608 tcp
US 147.185.221.20:1608 care-somewhere.gl.at.ply.gg tcp
US 147.185.221.20:1608 care-somewhere.gl.at.ply.gg tcp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp
US 147.185.221.20:1608 care-somewhere.gl.at.ply.gg tcp
N/A 127.0.0.1:1608 tcp
N/A 127.0.0.1:1608 tcp
N/A 127.0.0.1:1608 tcp
US 147.185.221.20:1608 care-somewhere.gl.at.ply.gg tcp
US 8.8.8.8:53 udp

Files

memory/1836-0-0x0000000074D02000-0x0000000074D03000-memory.dmp

memory/1836-1-0x0000000074D00000-0x00000000752B1000-memory.dmp

memory/1836-2-0x0000000074D00000-0x00000000752B1000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp395F.tmp

MD5 d03c4f78287a8c2ba11b867d222f3592
SHA1 bb1f39da40cff5636a67833a90114093394acd52
SHA256 aaef2431c0a7c272ddef710c8b25aea6afda0aaa2a9b06419b9ee5168d91bf35
SHA512 e49c5390cdf50432514974542fa0e10872b67bc69c2119174ecbac0b0fa6fd7d3d7ce179e9a47e51681dece3cffd0d6b9d11d2aa106a8e3a1aaf7252455e53ae

C:\Users\Admin\AppData\Local\Temp\tmp39AE.tmp

MD5 a77c223a0fc492dccd6fb9975f7a8766
SHA1 5e813636ae9b8138d78919348a5da3a6e8bd74b5
SHA256 589df7325d42409c50827600fedb240171ee4bdab85916474a37800c2382829e
SHA512 315cea8fde3c594404f5d3c96c710af1214cff6d08ccdb40634a739e108ff810e02624735a2b8c3e3720157b4a55327f317c3c23c3a681b46b9ab0f19060f7c0

memory/1836-10-0x0000000074D00000-0x00000000752B1000-memory.dmp

memory/1836-11-0x0000000074D00000-0x00000000752B1000-memory.dmp

memory/1836-12-0x0000000074D02000-0x0000000074D03000-memory.dmp

memory/1836-13-0x0000000074D00000-0x00000000752B1000-memory.dmp

memory/1836-14-0x0000000074D00000-0x00000000752B1000-memory.dmp