bbf32f721f502c8335108a4f836847f196468715650b24206227dfac35b90b3d

Analysis

max time kernel
149s
max time network
146s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
29/07/2024, 19:20

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General

Target
Builder.exe
Size 103KB
Sample240729-x2bnrazgnh
SHA256 bbf32f721f502c8335108a4f836847f196468715650b24206227dfac35b90b3d
MD5 1a8d329b143ca577d797abc2e852fa50
SHA1 dddd1c27ca7c0202cdd6d898b4277398868c09dc
SHA512 0e85ce5dd27556ab3d3bb192ec5e1e81b69b225e44182c9ae76addb62d7562a711eb2565695f82728a20341b1cdea1ddde9eaef077eb736d58d7a3a2895d64ae
SSDEEP 384:9On+6ikLRxdDsyNyyszHQxvDe8mkz/rAF+rMRTyN/0L+EcoinblneHQM3epzXoN8:0npeyNBszHQxC1kLrM+rMRa8NuuGt6
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

discovery evasion persistence privilege_escalation

Malware Config

Signatures

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2168	netsh.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\29c9d010b60ded964e813cc1bba758d5.exe	Builder.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\29c9d010b60ded964e813cc1bba758d5.exe	Builder.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000\Software\Microsoft\Windows\CurrentVersion\Run\29c9d010b60ded964e813cc1bba758d5 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Builder.exe\" .."	Builder.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\29c9d010b60ded964e813cc1bba758d5 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Builder.exe\" .."	Builder.exe

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Builder.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2136	taskkill.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2448	Builder.exe

Suspicious use of AdjustPrivilegeToken 38 IoCs

description	pid	Process
Token: SeDebugPrivilege	2448	Builder.exe
Token: SeDebugPrivilege	2136	taskkill.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe
Token: 33	2448	Builder.exe
Token: SeIncBasePriorityPrivilege	2448	Builder.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2448 wrote to memory of 2168	2448	Builder.exe	28
PID 2448 wrote to memory of 2168	2448	Builder.exe	28
PID 2448 wrote to memory of 2168	2448	Builder.exe	28
PID 2448 wrote to memory of 2168	2448	Builder.exe	28
PID 2448 wrote to memory of 2136	2448	Builder.exe	30
PID 2448 wrote to memory of 2136	2448	Builder.exe	30
PID 2448 wrote to memory of 2136	2448	Builder.exe	30
PID 2448 wrote to memory of 2136	2448	Builder.exe	30

C:\Users\Admin\AppData\Local\Temp\Builder.exe
"C:\Users\Admin\AppData\Local\Temp\Builder.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2448
- C:\Windows\SysWOW64\netsh.exe
  netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\Builder.exe" "Builder.exe" ENABLE
  2⤵
  - Modifies Windows Firewall
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:2168
- C:\Windows\SysWOW64\taskkill.exe
  taskkill /F /IM explorer.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:2136