a5345f726a7e273e3c8ad979f59bba7466dda82c01aaea43a6ea88c48dce26c7

Analysis

max time kernel
17s
max time network
24s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
27-08-2023 17:18

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Reason

Machine shutdown

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General

Target

a5345f726a7e273e3c8ad979f59bba7466dda82c01aaea43a6ea88c48dce26c7.exe
Size

828KB
MD5

694234dd2e13e36db1fb10843cff379b
SHA1

723cfb1494e59d8095326ae041fb6dfb3076b1b8
SHA256

a5345f726a7e273e3c8ad979f59bba7466dda82c01aaea43a6ea88c48dce26c7
SHA512

39a59f1b4f42d26b3a12c914c2f27ad197912a4fd00dab7d5d70daa52d88052339d489e4efda588cf2ed23ab03d1f8a5705dc492b1742b2ed1db1e63cc89382f
SSDEEP

12288:oxWHY/Btg/SJ/ac4cqeiuhveBS4SUgG2bTaNzhOITImKZ/b:ok4/BtRJ/aJcjVQQ4hglyNNOITa/b

Score

7^/10

bootkit persistence upx

Malware Config

Signatures

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x00090000000231aa-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
4444	a5345f726a7e273e3c8ad979f59bba7466dda82c01aaea43a6ea88c48dce26c7.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x00090000000231aa-1.dat	upx
behavioral2/memory/4444-5-0x00000000755F0000-0x000000007562C000-memory.dmp	upx

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\physicaldrive0	a5345f726a7e273e3c8ad979f59bba7466dda82c01aaea43a6ea88c48dce26c7.exe

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "243"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeShutdownPrivilege	4444	a5345f726a7e273e3c8ad979f59bba7466dda82c01aaea43a6ea88c48dce26c7.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4444	a5345f726a7e273e3c8ad979f59bba7466dda82c01aaea43a6ea88c48dce26c7.exe
4444	a5345f726a7e273e3c8ad979f59bba7466dda82c01aaea43a6ea88c48dce26c7.exe
4592	LogonUI.exe

C:\Users\Admin\AppData\Local\Temp\a5345f726a7e273e3c8ad979f59bba7466dda82c01aaea43a6ea88c48dce26c7.exe
"C:\Users\Admin\AppData\Local\Temp\a5345f726a7e273e3c8ad979f59bba7466dda82c01aaea43a6ea88c48dce26c7.exe"
1⤵
- Loads dropped DLL
- Writes to the Master Boot Record (MBR)
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4444

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa39e4055 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:4592

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\ExtraDll.dll

Filesize
97KB

MD5
c35425ad1f0c32225d307310deccc335

SHA1
b2e347b244e40ffa113dffaffd1895777e3ac30a

SHA256
48773d597155dc39dd172c26867972da89dd61fcee0d138433eda26a2d8633b7

SHA512
47b6a7447fcc4f9f21018f608fcbdb5650f16cbd869cae5d4ed5d9b88ca1e944de1cac10e9a252aa7b210f1a31456c0ed91728b8a7e24def99d7e3f9683e2bae

Download Submit
memory/4444-5-0x00000000755F0000-0x000000007562C000-memory.dmp

Filesize
240KB

Download

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads