Malware Analysis Report

2024-08-06 14:46

Sample ID 240617-g134lssbjm
Target b7273d96dc7c917e64858604650c6626_JaffaCakes118
SHA256 750c4da3b3142fa42663ab5a5d1441dcd28813961848321322c569784a4196eb
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

750c4da3b3142fa42663ab5a5d1441dcd28813961848321322c569784a4196eb

Threat Level: Known bad

The file b7273d96dc7c917e64858604650c6626_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

nanocore evasion keylogger persistence spyware stealer trojan

NanoCore

Adds Run key to start application

Checks whether UAC is enabled

Suspicious use of SetThreadContext

Drops file in Program Files directory

Unsigned PE

Creates scheduled task(s)

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

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
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

2024-06-17 06:17

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-17 06:17

Reported

2024-06-17 06:19

Platform

win10v2004-20240508-en

Max time kernel

147s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.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:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.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:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4724 set thread context of 2512 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\DHCP Service\dhcpsv.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A
File opened for modification C:\Program Files (x86)\DHCP Service\dhcpsv.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

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\Temp\ACH PAYMENT REMITTANCE.DOC.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4724 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 4724 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 4724 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 4724 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 4724 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 4724 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 4724 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 4724 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2512 wrote to memory of 3440 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2512 wrote to memory of 3440 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2512 wrote to memory of 3440 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2512 wrote to memory of 4076 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2512 wrote to memory of 4076 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2512 wrote to memory of 4076 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe

Processes

C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe

"C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe"

C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "DHCP Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp5350.tmp"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "DHCP Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp53BE.tmp"

Network

Country Destination Domain Proto
US 8.8.8.8:53 maquicantro.duckdns.org udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 maquicantro.duckdns.org udp
US 8.8.8.8:53 maquicantro.duckdns.org udp
US 8.8.8.8:53 maquicantro.duckdns.org udp
US 8.8.8.8:53 maquicantro.duckdns.org udp
US 8.8.8.8:53 maquicantro.duckdns.org udp
US 8.8.8.8:53 maquicantro.duckdns.org udp
US 8.8.8.8:53 maquicantro.duckdns.org udp
US 8.8.8.8:53 maquicantro.duckdns.org udp

Files

memory/4724-0-0x00000000752AE000-0x00000000752AF000-memory.dmp

memory/4724-1-0x0000000000A40000-0x0000000000B16000-memory.dmp

memory/4724-2-0x0000000005400000-0x0000000005444000-memory.dmp

memory/4724-3-0x0000000005440000-0x000000000544C000-memory.dmp

memory/4724-5-0x0000000005460000-0x0000000005498000-memory.dmp

memory/4724-6-0x00000000055E0000-0x000000000567C000-memory.dmp

memory/2512-7-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2512-9-0x0000000075402000-0x0000000075403000-memory.dmp

memory/2512-10-0x0000000075400000-0x00000000759B1000-memory.dmp

memory/2512-11-0x0000000075400000-0x00000000759B1000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp5350.tmp

MD5 c6f0625bf4c1cdfb699980c9243d3b22
SHA1 43de1fe580576935516327f17b5da0c656c72851
SHA256 8dfc4e937f0b2374e3ced25fce344b0731cf44b8854625b318d50ece2da8f576
SHA512 9ef2dbd4142ad0e1e6006929376ecb8011e7ffc801ee2101e906787d70325ad82752df65839de9972391fa52e1e5974ec1a5c7465a88aa56257633ebb7d70969

C:\Users\Admin\AppData\Local\Temp\tmp53BE.tmp

MD5 a77c223a0fc492dccd6fb9975f7a8766
SHA1 5e813636ae9b8138d78919348a5da3a6e8bd74b5
SHA256 589df7325d42409c50827600fedb240171ee4bdab85916474a37800c2382829e
SHA512 315cea8fde3c594404f5d3c96c710af1214cff6d08ccdb40634a739e108ff810e02624735a2b8c3e3720157b4a55327f317c3c23c3a681b46b9ab0f19060f7c0

memory/2512-19-0x0000000075402000-0x0000000075403000-memory.dmp

memory/2512-20-0x0000000075400000-0x00000000759B1000-memory.dmp

memory/2512-21-0x0000000075400000-0x00000000759B1000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-17 06:17

Reported

2024-06-17 06:19

Platform

win7-20240508-en

Max time kernel

146s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.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\LAN Service = "C:\\Program Files (x86)\\LAN Service\\lansv.exe" C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.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:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2716 set thread context of 3044 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\LAN Service\lansv.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A
File opened for modification C:\Program Files (x86)\LAN Service\lansv.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

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\Temp\ACH PAYMENT REMITTANCE.DOC.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2716 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2716 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2716 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2716 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2716 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2716 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2716 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2716 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2716 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2716 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2716 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2716 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 3044 wrote to memory of 2668 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 3044 wrote to memory of 2668 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 3044 wrote to memory of 2668 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 3044 wrote to memory of 2668 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 3044 wrote to memory of 2056 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 3044 wrote to memory of 2056 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 3044 wrote to memory of 2056 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 3044 wrote to memory of 2056 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe

Processes

C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe

"C:\Users\Admin\AppData\Local\Temp\ACH PAYMENT REMITTANCE.DOC.exe"

C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "LAN Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp1A06.tmp"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "LAN Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp1AC2.tmp"

Network

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

Files

memory/2716-0-0x0000000074C3E000-0x0000000074C3F000-memory.dmp

memory/2716-1-0x0000000000210000-0x00000000002E6000-memory.dmp

memory/2716-2-0x00000000003D0000-0x0000000000414000-memory.dmp

memory/2716-3-0x0000000000630000-0x000000000063C000-memory.dmp

memory/2716-5-0x0000000000650000-0x0000000000688000-memory.dmp

memory/3044-10-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3044-16-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3044-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3044-18-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3044-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/3044-12-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3044-8-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3044-6-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3044-21-0x0000000074C30000-0x00000000751DB000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp1A06.tmp

MD5 c6f0625bf4c1cdfb699980c9243d3b22
SHA1 43de1fe580576935516327f17b5da0c656c72851
SHA256 8dfc4e937f0b2374e3ced25fce344b0731cf44b8854625b318d50ece2da8f576
SHA512 9ef2dbd4142ad0e1e6006929376ecb8011e7ffc801ee2101e906787d70325ad82752df65839de9972391fa52e1e5974ec1a5c7465a88aa56257633ebb7d70969

C:\Users\Admin\AppData\Local\Temp\tmp1AC2.tmp

MD5 6b30dba7972c92c9a1b881e88c108b15
SHA1 f76207985cc5a1f70edb2fb5bd45678f195a4564
SHA256 578f5b0ff051f02f8e0a67fc3424dad554fa9489875475ea624fbb63eabfcbf7
SHA512 e3dd368937f863cb07453de12173580fb63b8d3983db7119c24860f227c89ded76401c47607f5b1134d215d46fe2b40d4bc3d7299374f1e8abecdeaefc7b9099

memory/3044-29-0x0000000074C30000-0x00000000751DB000-memory.dmp