Malware Analysis Report

2024-08-06 14:47

Sample ID 240614-mcrcsszeqq
Target a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118
SHA256 20751156d821460ab4c7db367bf964831c51daac7bf4a4eecfa4c0cf23816490
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

20751156d821460ab4c7db367bf964831c51daac7bf4a4eecfa4c0cf23816490

Threat Level: Known bad

The file a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

nanocore evasion keylogger persistence spyware stealer trojan

NanoCore

Nanocore family

Checks computer location settings

Loads dropped DLL

Executes dropped EXE

Adds Run key to start application

Checks whether UAC is enabled

Drops file in Program Files directory

Unsigned PE

Enumerates physical storage devices

Creates scheduled task(s)

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Scheduled Task/Job
T1053
Persistence
TA0003
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Scheduled Task/Job
T1053
Privilege Escalation
TA0004
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Scheduled Task/Job
T1053
Defense Evasion
TA0005
Modify Registry
T1112
Credential Access
TA0006
Discovery
TA0007
Query Registry
T1012
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

2024-06-14 10:19

Signatures

Nanocore family

nanocore

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-14 10:19

Reported

2024-06-14 10:22

Platform

win10v2004-20240611-en

Max time kernel

149s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118.exe"

Signatures

NanoCore

keylogger trojan stealer spyware nanocore

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3169499791-3545231813-3156325206-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118.exe N/A

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\SAAS Manager = "C:\\Program Files (x86)\\SAAS Manager\\saasmgr.exe" C:\Users\Admin\AppData\Local\Tempexplorer.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\Tempexplorer.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\SAAS Manager\saasmgr.exe C:\Users\Admin\AppData\Local\Tempexplorer.exe N/A
File created C:\Program Files (x86)\SAAS Manager\saasmgr.exe C:\Users\Admin\AppData\Local\Tempexplorer.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
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\Tempexplorer.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Tempexplorer.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Tempexplorer.exe N/A

Suspicious behavior: GetForegroundWindowSpam

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2848 wrote to memory of 2836 N/A C:\Users\Admin\AppData\Local\Temp\a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Tempexplorer.exe
PID 2848 wrote to memory of 2836 N/A C:\Users\Admin\AppData\Local\Temp\a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Tempexplorer.exe
PID 2848 wrote to memory of 2836 N/A C:\Users\Admin\AppData\Local\Temp\a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Tempexplorer.exe
PID 2836 wrote to memory of 3732 N/A C:\Users\Admin\AppData\Local\Tempexplorer.exe C:\Windows\SysWOW64\schtasks.exe
PID 2836 wrote to memory of 3732 N/A C:\Users\Admin\AppData\Local\Tempexplorer.exe C:\Windows\SysWOW64\schtasks.exe
PID 2836 wrote to memory of 3732 N/A C:\Users\Admin\AppData\Local\Tempexplorer.exe C:\Windows\SysWOW64\schtasks.exe
PID 2836 wrote to memory of 2172 N/A C:\Users\Admin\AppData\Local\Tempexplorer.exe C:\Windows\SysWOW64\schtasks.exe
PID 2836 wrote to memory of 2172 N/A C:\Users\Admin\AppData\Local\Tempexplorer.exe C:\Windows\SysWOW64\schtasks.exe
PID 2836 wrote to memory of 2172 N/A C:\Users\Admin\AppData\Local\Tempexplorer.exe C:\Windows\SysWOW64\schtasks.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Tempexplorer.exe

"C:\Users\Admin\AppData\Local\Tempexplorer.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "SAAS Manager" /xml "C:\Users\Admin\AppData\Local\Temp\tmp686E.tmp"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "SAAS Manager Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp68EC.tmp"

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 131.253.33.237:443 g.bing.com tcp
US 8.8.8.8:53 237.33.253.131.in-addr.arpa udp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 25.140.123.92.in-addr.arpa udp
BE 88.221.83.232:443 www.bing.com tcp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 232.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 googleupdater.duckdns.org udp
MA 102.101.85.0:54984 googleupdater.duckdns.org tcp
US 8.8.8.8:53 googleupdater.duckdns.org udp
MA 102.101.85.0:54984 googleupdater.duckdns.org tcp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 googleupdater.duckdns.org udp
MA 102.101.85.0:54984 googleupdater.duckdns.org tcp
US 8.8.8.8:53 googleupdater.duckdns.org udp
MA 102.101.85.0:54984 googleupdater.duckdns.org tcp
US 8.8.8.8:53 145.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 googleupdater.duckdns.org udp
MA 102.101.85.0:54984 googleupdater.duckdns.org tcp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 googleupdater.duckdns.org udp
MA 102.101.85.0:54984 googleupdater.duckdns.org tcp
US 8.8.8.8:53 googleupdater.duckdns.org udp
MA 102.101.85.0:54984 googleupdater.duckdns.org tcp
US 8.8.8.8:53 googleupdater.duckdns.org udp
MA 102.101.85.0:54984 googleupdater.duckdns.org tcp
US 8.8.8.8:53 googleupdater.duckdns.org udp
MA 102.101.85.0:54984 googleupdater.duckdns.org tcp

Files

memory/2848-0-0x00000000751EE000-0x00000000751EF000-memory.dmp

memory/2848-1-0x0000000000AF0000-0x0000000000B32000-memory.dmp

memory/2848-2-0x00000000059C0000-0x0000000005F64000-memory.dmp

memory/2848-3-0x0000000005410000-0x00000000054A2000-memory.dmp

memory/2848-4-0x00000000054B0000-0x000000000554C000-memory.dmp

memory/2848-5-0x00000000053A0000-0x00000000053AA000-memory.dmp

memory/2848-6-0x00000000751E0000-0x0000000075990000-memory.dmp

C:\Users\Admin\AppData\Local\Tempexplorer.exe

MD5 2a10ebef275e2d24c8f3e3d8dd01e929
SHA1 5d82da79265984af7399c6d19766b9d3afb4fe59
SHA256 226de25b7d0372d2f18c5f080d58a2766b50b70bb2f4f4505071acd45407abaa
SHA512 06fe337e2444b15a3ac0a16645a9b114033f4c6ebc0465c660a739615a7d1e134dfebfc630565a8d5df11aa3e7d38a186a1a36e7746322492f7f65031ae2b32c

memory/2848-16-0x00000000751E0000-0x0000000075990000-memory.dmp

memory/2836-17-0x0000000070472000-0x0000000070473000-memory.dmp

memory/2836-18-0x0000000070470000-0x0000000070A21000-memory.dmp

memory/2836-19-0x0000000070470000-0x0000000070A21000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp686E.tmp

MD5 c32c74e937be74259424933c09985921
SHA1 b0a7f3b2609bd66e695181e492a904c994c40553
SHA256 1ae1a9bb3477f5dcb9c0be4a919e54eca05647e254725af8e9a552628b255cef
SHA512 96e17111f01c88c2b8edaa2ec08b4cd5dd40f4e0b78dcf316d7c3ca3b69267fd63a4f91ddf01baa50ddcee7b4fa393d91e4ba80087010caf7accf47dac29889e

C:\Users\Admin\AppData\Local\Temp\tmp68EC.tmp

MD5 b5ee6d4d0a6aab49e12d44d82afc5157
SHA1 9fbe67452ca81b59802441955020086c3d163b2c
SHA256 f769b73883f96cefd35c438e8bdbe12c10a87ce11e09e4084474a85f6e4f8a10
SHA512 c4071b68c40aedd04b48bcbf4c4256e8b746474c6d4cfe680a4c0bcd61c9c4daa45d5d1e2fc8df655feba77de485258d06a81ac1a9144ed37ab9c80fbce09754

memory/2836-27-0x0000000070470000-0x0000000070A21000-memory.dmp

memory/2836-28-0x0000000070470000-0x0000000070A21000-memory.dmp

memory/2836-29-0x0000000070472000-0x0000000070473000-memory.dmp

memory/2836-30-0x0000000070470000-0x0000000070A21000-memory.dmp

memory/2836-31-0x0000000070470000-0x0000000070A21000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-14 10:19

Reported

2024-06-14 10:22

Platform

win7-20240508-en

Max time kernel

146s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118.exe"

Signatures

NanoCore

keylogger trojan stealer spyware nanocore

Executes dropped EXE

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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\NTFS Monitor = "C:\\Program Files (x86)\\NTFS Monitor\\ntfsmon.exe" C:\Users\Admin\AppData\Local\Tempexplorer.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\Tempexplorer.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\NTFS Monitor\ntfsmon.exe C:\Users\Admin\AppData\Local\Tempexplorer.exe N/A
File opened for modification C:\Program Files (x86)\NTFS Monitor\ntfsmon.exe C:\Users\Admin\AppData\Local\Tempexplorer.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
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\Tempexplorer.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Tempexplorer.exe N/A

Suspicious behavior: GetForegroundWindowSpam

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1736 wrote to memory of 1744 N/A C:\Users\Admin\AppData\Local\Temp\a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Tempexplorer.exe
PID 1736 wrote to memory of 1744 N/A C:\Users\Admin\AppData\Local\Temp\a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Tempexplorer.exe
PID 1736 wrote to memory of 1744 N/A C:\Users\Admin\AppData\Local\Temp\a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Tempexplorer.exe
PID 1736 wrote to memory of 1744 N/A C:\Users\Admin\AppData\Local\Temp\a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Tempexplorer.exe
PID 1744 wrote to memory of 2104 N/A C:\Users\Admin\AppData\Local\Tempexplorer.exe C:\Windows\SysWOW64\schtasks.exe
PID 1744 wrote to memory of 2104 N/A C:\Users\Admin\AppData\Local\Tempexplorer.exe C:\Windows\SysWOW64\schtasks.exe
PID 1744 wrote to memory of 2104 N/A C:\Users\Admin\AppData\Local\Tempexplorer.exe C:\Windows\SysWOW64\schtasks.exe
PID 1744 wrote to memory of 2104 N/A C:\Users\Admin\AppData\Local\Tempexplorer.exe C:\Windows\SysWOW64\schtasks.exe
PID 1744 wrote to memory of 2776 N/A C:\Users\Admin\AppData\Local\Tempexplorer.exe C:\Windows\SysWOW64\schtasks.exe
PID 1744 wrote to memory of 2776 N/A C:\Users\Admin\AppData\Local\Tempexplorer.exe C:\Windows\SysWOW64\schtasks.exe
PID 1744 wrote to memory of 2776 N/A C:\Users\Admin\AppData\Local\Tempexplorer.exe C:\Windows\SysWOW64\schtasks.exe
PID 1744 wrote to memory of 2776 N/A C:\Users\Admin\AppData\Local\Tempexplorer.exe C:\Windows\SysWOW64\schtasks.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\a929acb4997a9366c61cb3edcc0b2498_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Tempexplorer.exe

"C:\Users\Admin\AppData\Local\Tempexplorer.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "NTFS Monitor" /xml "C:\Users\Admin\AppData\Local\Temp\tmp1F24.tmp"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "NTFS Monitor Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp1FC1.tmp"

Network

Country Destination Domain Proto
US 8.8.8.8:53 googleupdater.duckdns.org udp
US 8.8.4.4:53 googleupdater.duckdns.org udp
US 8.8.8.8:53 googleupdater.duckdns.org udp
US 8.8.8.8:53 googleupdater.duckdns.org udp
US 8.8.4.4:53 googleupdater.duckdns.org udp
US 8.8.8.8:53 googleupdater.duckdns.org udp
US 8.8.8.8:53 googleupdater.duckdns.org udp
US 8.8.4.4:53 googleupdater.duckdns.org udp
US 8.8.8.8:53 googleupdater.duckdns.org udp
US 8.8.8.8:53 googleupdater.duckdns.org udp
US 8.8.4.4:53 googleupdater.duckdns.org udp
US 8.8.8.8:53 googleupdater.duckdns.org udp

Files

memory/1736-0-0x0000000074D7E000-0x0000000074D7F000-memory.dmp

memory/1736-1-0x0000000000E80000-0x0000000000EC2000-memory.dmp

memory/1736-2-0x0000000074D70000-0x000000007545E000-memory.dmp

\Users\Admin\AppData\Local\Tempexplorer.exe

MD5 2a10ebef275e2d24c8f3e3d8dd01e929
SHA1 5d82da79265984af7399c6d19766b9d3afb4fe59
SHA256 226de25b7d0372d2f18c5f080d58a2766b50b70bb2f4f4505071acd45407abaa
SHA512 06fe337e2444b15a3ac0a16645a9b114033f4c6ebc0465c660a739615a7d1e134dfebfc630565a8d5df11aa3e7d38a186a1a36e7746322492f7f65031ae2b32c

memory/1736-13-0x0000000074D70000-0x000000007545E000-memory.dmp

memory/1744-14-0x000000006FF31000-0x000000006FF32000-memory.dmp

memory/1744-15-0x000000006FF30000-0x00000000704DB000-memory.dmp

memory/1744-16-0x000000006FF30000-0x00000000704DB000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp1F24.tmp

MD5 c32c74e937be74259424933c09985921
SHA1 b0a7f3b2609bd66e695181e492a904c994c40553
SHA256 1ae1a9bb3477f5dcb9c0be4a919e54eca05647e254725af8e9a552628b255cef
SHA512 96e17111f01c88c2b8edaa2ec08b4cd5dd40f4e0b78dcf316d7c3ca3b69267fd63a4f91ddf01baa50ddcee7b4fa393d91e4ba80087010caf7accf47dac29889e

C:\Users\Admin\AppData\Local\Temp\tmp1FC1.tmp

MD5 981e126601526eaa5b0ad45c496c4465
SHA1 d610d6a21a8420cc73fcd3e54ddae75a5897b28b
SHA256 11ae277dfa39e7038b782ca6557339e7fe88533fe83705c356a1500a1402d527
SHA512 a59fb704d931ccb7e1ec1a7b98e24ccd8708be529066c6de4b673098cdebef539f7f50d9e051c43954b5a8e7f810862b3a4ede170f131e080dadc3e763ed4bdb

memory/1744-24-0x000000006FF30000-0x00000000704DB000-memory.dmp