Malware Analysis Report

2024-09-11 03:28

Sample ID 240614-bjcx7sygnd
Target Block_or_UnBlock_Buildbox.exe
SHA256 4614271442d34e3fd48c2e66a1ecbec97cb74af75c1f4c049cba513e43b2a7a2
Tags
discovery exploit
score
8/10

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
8/10

SHA256

4614271442d34e3fd48c2e66a1ecbec97cb74af75c1f4c049cba513e43b2a7a2

Threat Level: Likely malicious

The file Block_or_UnBlock_Buildbox.exe was found to be: Likely malicious.

Malicious Activity Summary

discovery exploit

Possible privilege escalation attempt

Drops file in Drivers directory

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

Modifies file permissions

Enumerates physical storage devices

Unsigned PE

Modifies data under HKEY_USERS

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Privilege Escalation
TA0004
Defense Evasion
TA0005
File and Directory Permissions Modification
T1222
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 01:10

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-14 01:10

Reported

2024-06-14 01:10

Platform

win7-20240508-en

Max time kernel

8s

Max time network

0s

Command Line

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

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-Q7K1V.tmp\Block_or_UnBlock_Buildbox.tmp N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Block_or_UnBlock_Buildbox.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-Q7K1V.tmp\Block_or_UnBlock_Buildbox.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-Q7K1V.tmp\Block_or_UnBlock_Buildbox.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1924 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\Block_or_UnBlock_Buildbox.exe C:\Users\Admin\AppData\Local\Temp\is-Q7K1V.tmp\Block_or_UnBlock_Buildbox.tmp
PID 1924 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\Block_or_UnBlock_Buildbox.exe C:\Users\Admin\AppData\Local\Temp\is-Q7K1V.tmp\Block_or_UnBlock_Buildbox.tmp
PID 1924 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\Block_or_UnBlock_Buildbox.exe C:\Users\Admin\AppData\Local\Temp\is-Q7K1V.tmp\Block_or_UnBlock_Buildbox.tmp
PID 1924 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\Block_or_UnBlock_Buildbox.exe C:\Users\Admin\AppData\Local\Temp\is-Q7K1V.tmp\Block_or_UnBlock_Buildbox.tmp
PID 1924 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\Block_or_UnBlock_Buildbox.exe C:\Users\Admin\AppData\Local\Temp\is-Q7K1V.tmp\Block_or_UnBlock_Buildbox.tmp
PID 1924 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\Block_or_UnBlock_Buildbox.exe C:\Users\Admin\AppData\Local\Temp\is-Q7K1V.tmp\Block_or_UnBlock_Buildbox.tmp
PID 1924 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\Block_or_UnBlock_Buildbox.exe C:\Users\Admin\AppData\Local\Temp\is-Q7K1V.tmp\Block_or_UnBlock_Buildbox.tmp

Processes

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

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

C:\Users\Admin\AppData\Local\Temp\is-Q7K1V.tmp\Block_or_UnBlock_Buildbox.tmp

"C:\Users\Admin\AppData\Local\Temp\is-Q7K1V.tmp\Block_or_UnBlock_Buildbox.tmp" /SL5="$5014E,51712,51712,C:\Users\Admin\AppData\Local\Temp\Block_or_UnBlock_Buildbox.exe"

Network

N/A

Files

memory/1924-0-0x0000000000400000-0x0000000000414000-memory.dmp

memory/1924-2-0x0000000000401000-0x000000000040B000-memory.dmp

\Users\Admin\AppData\Local\Temp\is-Q7K1V.tmp\Block_or_UnBlock_Buildbox.tmp

MD5 a3cb385cf594e6eeafd8a5e306062df4
SHA1 806c03e6dd07e3fbd989c36125bcff19f1b1ae8a
SHA256 5150b6bba6aa1ba21d90947af0939435b76fad074016b3219431d5763a3aa308
SHA512 71c1ba9d04ecc6f8c5d033d0c98f65d1c7b881239718e46b195b7f5e448ce6706d492ad73675d39bf3029f6085494b978577ad9faf5d018f54efc653f1b0902b

\Users\Admin\AppData\Local\Temp\is-JNN8C.tmp\_isetup\_shfoldr.dll

MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

memory/3060-10-0x0000000000400000-0x00000000004BC000-memory.dmp

memory/3060-17-0x0000000000400000-0x00000000004BC000-memory.dmp

memory/1924-19-0x0000000000400000-0x0000000000414000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-14 01:10

Reported

2024-06-14 01:10

Platform

win10v2004-20240611-en

Max time kernel

34s

Max time network

36s

Command Line

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

Signatures

Drops file in Drivers directory

Description Indicator Process Target
File opened for modification C:\Windows\system32\drivers\etc\hosts C:\Users\Admin\AppData\Local\Temp\is-R6UQD.tmp\Block_or_UnBlock_Buildbox.tmp N/A
File created C:\Windows\system32\drivers\etc\hosts C:\Users\Admin\AppData\Local\Temp\is-R6UQD.tmp\Block_or_UnBlock_Buildbox.tmp N/A

Possible privilege escalation attempt

exploit
Description Indicator Process Target
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3665033694-1447845302-680750983-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\is-R6UQD.tmp\Block_or_UnBlock_Buildbox.tmp N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-R6UQD.tmp\Block_or_UnBlock_Buildbox.tmp N/A

Modifies file permissions

discovery
Description Indicator Process Target
N/A N/A C:\Windows\system32\takeown.exe N/A
N/A N/A C:\Windows\system32\icacls.exe N/A

Enumerates physical storage devices

Modifies data under HKEY_USERS

Description Indicator Process Target
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271" C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "197" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1" C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent C:\Windows\system32\LogonUI.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00 C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040" C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1" C:\Windows\system32\LogonUI.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeShutdownPrivilege N/A C:\Windows\SysWOW64\shutdown.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\SysWOW64\shutdown.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\system32\LogonUI.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1224 wrote to memory of 932 N/A C:\Users\Admin\AppData\Local\Temp\Block_or_UnBlock_Buildbox.exe C:\Users\Admin\AppData\Local\Temp\is-R6UQD.tmp\Block_or_UnBlock_Buildbox.tmp
PID 1224 wrote to memory of 932 N/A C:\Users\Admin\AppData\Local\Temp\Block_or_UnBlock_Buildbox.exe C:\Users\Admin\AppData\Local\Temp\is-R6UQD.tmp\Block_or_UnBlock_Buildbox.tmp
PID 1224 wrote to memory of 932 N/A C:\Users\Admin\AppData\Local\Temp\Block_or_UnBlock_Buildbox.exe C:\Users\Admin\AppData\Local\Temp\is-R6UQD.tmp\Block_or_UnBlock_Buildbox.tmp
PID 932 wrote to memory of 1348 N/A C:\Users\Admin\AppData\Local\Temp\is-R6UQD.tmp\Block_or_UnBlock_Buildbox.tmp C:\Windows\SYSTEM32\cmd.exe
PID 932 wrote to memory of 1348 N/A C:\Users\Admin\AppData\Local\Temp\is-R6UQD.tmp\Block_or_UnBlock_Buildbox.tmp C:\Windows\SYSTEM32\cmd.exe
PID 1348 wrote to memory of 3480 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\takeown.exe
PID 1348 wrote to memory of 3480 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\takeown.exe
PID 932 wrote to memory of 1432 N/A C:\Users\Admin\AppData\Local\Temp\is-R6UQD.tmp\Block_or_UnBlock_Buildbox.tmp C:\Windows\SYSTEM32\cmd.exe
PID 932 wrote to memory of 1432 N/A C:\Users\Admin\AppData\Local\Temp\is-R6UQD.tmp\Block_or_UnBlock_Buildbox.tmp C:\Windows\SYSTEM32\cmd.exe
PID 1432 wrote to memory of 532 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\icacls.exe
PID 1432 wrote to memory of 532 N/A C:\Windows\SYSTEM32\cmd.exe C:\Windows\system32\icacls.exe
PID 932 wrote to memory of 4184 N/A C:\Users\Admin\AppData\Local\Temp\is-R6UQD.tmp\Block_or_UnBlock_Buildbox.tmp C:\Windows\SysWOW64\shutdown.exe
PID 932 wrote to memory of 4184 N/A C:\Users\Admin\AppData\Local\Temp\is-R6UQD.tmp\Block_or_UnBlock_Buildbox.tmp C:\Windows\SysWOW64\shutdown.exe
PID 932 wrote to memory of 4184 N/A C:\Users\Admin\AppData\Local\Temp\is-R6UQD.tmp\Block_or_UnBlock_Buildbox.tmp C:\Windows\SysWOW64\shutdown.exe

Processes

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

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

C:\Users\Admin\AppData\Local\Temp\is-R6UQD.tmp\Block_or_UnBlock_Buildbox.tmp

"C:\Users\Admin\AppData\Local\Temp\is-R6UQD.tmp\Block_or_UnBlock_Buildbox.tmp" /SL5="$D0056,51712,51712,C:\Users\Admin\AppData\Local\Temp\Block_or_UnBlock_Buildbox.exe"

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4132,i,3671441404766730751,12082497324212183132,262144 --variations-seed-version --mojo-platform-channel-handle=4104 /prefetch:8

C:\Windows\SYSTEM32\cmd.exe

"cmd.exe" /c takeown /f "C:\Windows\system32\drivers\etc\hosts" /r /d y

C:\Windows\system32\takeown.exe

takeown /f "C:\Windows\system32\drivers\etc\hosts" /r /d y

C:\Windows\SYSTEM32\cmd.exe

"cmd.exe" /c icacls "C:\Windows\system32\drivers\etc\hosts " /grant everyone:F /c /t /q

C:\Windows\system32\icacls.exe

icacls "C:\Windows\system32\drivers\etc\hosts " /grant everyone:F /c /t /q

C:\Windows\SysWOW64\shutdown.exe

"C:\Windows\System32\shutdown.exe" -r -t 6

C:\Windows\system32\LogonUI.exe

"LogonUI.exe" /flags:0x4 /state0:0xa3946855 /state1:0x41c64e6d

Network

Country Destination Domain Proto
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 10.160.77.104.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 65.139.73.23.in-addr.arpa udp
US 8.8.8.8:53 30.73.42.20.in-addr.arpa udp

Files

memory/1224-0-0x0000000000400000-0x0000000000414000-memory.dmp

memory/1224-3-0x0000000000401000-0x000000000040B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-R6UQD.tmp\Block_or_UnBlock_Buildbox.tmp

MD5 a3cb385cf594e6eeafd8a5e306062df4
SHA1 806c03e6dd07e3fbd989c36125bcff19f1b1ae8a
SHA256 5150b6bba6aa1ba21d90947af0939435b76fad074016b3219431d5763a3aa308
SHA512 71c1ba9d04ecc6f8c5d033d0c98f65d1c7b881239718e46b195b7f5e448ce6706d492ad73675d39bf3029f6085494b978577ad9faf5d018f54efc653f1b0902b

memory/932-11-0x0000000000400000-0x00000000004BC000-memory.dmp

memory/1224-12-0x0000000000400000-0x0000000000414000-memory.dmp

memory/932-13-0x0000000000400000-0x00000000004BC000-memory.dmp

memory/932-22-0x0000000000400000-0x00000000004BC000-memory.dmp

memory/932-26-0x0000000000400000-0x00000000004BC000-memory.dmp

memory/1224-27-0x0000000000400000-0x0000000000414000-memory.dmp