Malware Analysis Report

2024-09-11 12:21

Sample ID 240614-kprg8awhrl
Target 2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware
SHA256 c5db6dd705f441638bd3c46a306dc3ec186c0b37486e390f7744f6ac07187dea
Tags
sality backdoor evasion trojan upx
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

c5db6dd705f441638bd3c46a306dc3ec186c0b37486e390f7744f6ac07187dea

Threat Level: Known bad

The file 2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware was found to be: Known bad.

Malicious Activity Summary

sality backdoor evasion trojan upx

UAC bypass

Sality

Windows security bypass

Modifies firewall policy service

UPX dump on OEP (original entry point)

Detects executables packed with Sality Polymorphic Code Generator or Simple Poly Engine or Sality

Windows security modification

UPX packed file

Checks whether UAC is enabled

Drops file in Windows directory

Unsigned PE

Suspicious use of AdjustPrivilegeToken

System policy modification

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Create or Modify System Process
T1543
Windows Service
T1543.003
Privilege Escalation
TA0004
Create or Modify System Process
T1543
Windows Service
T1543.003
Abuse Elevation Control Mechanism
T1548
Bypass User Account Control
T1548.002
Defense Evasion
TA0005
Modify Registry
T1112
Abuse Elevation Control Mechanism
T1548
Bypass User Account Control
T1548.002
Impair Defenses
T1562
Disable or Modify Tools
T1562.001
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

2024-06-14 08:46

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-14 08:46

Reported

2024-06-14 08:49

Platform

win7-20240220-en

Max time kernel

117s

Max time network

118s

Command Line

"C:\Windows\system32\Dwm.exe"

Signatures

Modifies firewall policy service

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A

Sality

backdoor sality

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A

Windows security bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A

Detects executables packed with Sality Polymorphic Code Generator or Simple Poly Engine or Sality

Description Indicator Process Target
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UPX dump on OEP (original entry point)

Description Indicator Process Target
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UPX packed file

upx
Description Indicator Process Target
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Windows security modification

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\Svc C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\f762858 C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
File opened for modification C:\Windows\SYSTEM.INI C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2836 wrote to memory of 1064 N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe C:\Windows\system32\Dwm.exe
PID 2836 wrote to memory of 1092 N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe C:\Windows\system32\taskhost.exe
PID 2836 wrote to memory of 1132 N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe C:\Windows\Explorer.EXE
PID 2836 wrote to memory of 2376 N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe C:\Windows\system32\DllHost.exe
PID 2836 wrote to memory of 2908 N/A C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe C:\Windows\system32\conhost.exe

System policy modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe N/A

Processes

C:\Windows\system32\Dwm.exe

"C:\Windows\system32\Dwm.exe"

C:\Windows\system32\taskhost.exe

"taskhost.exe"

C:\Windows\Explorer.EXE

C:\Windows\Explorer.EXE

C:\Windows\system32\DllHost.exe

C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}

C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe"

C:\Windows\system32\conhost.exe

\??\C:\Windows\system32\conhost.exe "-6434639861470573607-2047524761621393548-13914189-129334683-17505138431782136303"

Network

N/A

Files

memory/2836-0-0x0000000000400000-0x000000000042B000-memory.dmp

memory/2836-10-0x0000000002260000-0x000000000331A000-memory.dmp

memory/2836-16-0x0000000002260000-0x000000000331A000-memory.dmp

memory/2836-39-0x0000000002260000-0x000000000331A000-memory.dmp

memory/2836-38-0x0000000000400000-0x000000000042B000-memory.dmp

memory/2836-6-0x0000000002260000-0x000000000331A000-memory.dmp

memory/2836-9-0x0000000002260000-0x000000000331A000-memory.dmp

memory/1064-11-0x00000000001B0000-0x00000000001B2000-memory.dmp

memory/2836-8-0x0000000002260000-0x000000000331A000-memory.dmp

memory/2836-7-0x0000000002260000-0x000000000331A000-memory.dmp

memory/2836-5-0x0000000002260000-0x000000000331A000-memory.dmp

memory/2836-4-0x0000000002260000-0x000000000331A000-memory.dmp

memory/2836-3-0x0000000002260000-0x000000000331A000-memory.dmp

memory/2836-26-0x0000000002260000-0x000000000331A000-memory.dmp

memory/2836-24-0x00000000003A0000-0x00000000003A1000-memory.dmp

memory/2836-22-0x00000000003A0000-0x00000000003A1000-memory.dmp

memory/2836-21-0x00000000002D0000-0x00000000002D2000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-14 08:46

Reported

2024-06-14 08:49

Platform

win10v2004-20240611-en

Max time kernel

92s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe"

Signatures

Sality

backdoor sality

Detects executables packed with Sality Polymorphic Code Generator or Simple Poly Engine or Sality

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

UPX dump on OEP (original entry point)

Description Indicator Process Target
N/A N/A N/A N/A
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UPX packed file

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

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-14_3f4d53ae5b80005348be8b379c72921d_bkransomware.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 241.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp

Files

memory/3600-0-0x0000000000400000-0x000000000042B000-memory.dmp

memory/3600-2-0x0000000000400000-0x000000000042B000-memory.dmp

memory/3600-3-0x0000000000A50000-0x0000000001B0A000-memory.dmp

memory/3600-4-0x0000000000A50000-0x0000000001B0A000-memory.dmp