170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d

Analysis

max time kernel
162s
max time network
139s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
06/03/2024, 17:51

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General

Target

170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Size

76KB
MD5

3c0a8699172d7886b98c5399ca95a5fa
SHA1

611613328460301f4659b78f22b6582b13aae43b
SHA256

170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d
SHA512

b0d8fe7602dc819e2f404e6365a11e2fc0eb6cc6339a10df0b3230888db57dc9951e0357f7edc32f2aa12883ed35dddb44b2b4acaa348bec7bfb79534870af81
SSDEEP

768:QM34MSL0OXIxDMyDRjFVZrhgFwumSCbxTGy/BBGg4NK8jhh/vn2+mRcDkUCXVBno:74M1OX8MUu3abBGy3G8srcfu

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies visibility of file extensions in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2461186416-2307104501-1787948496-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2461186416-2307104501-1787948496-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	vc.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2461186416-2307104501-1787948496-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2461186416-2307104501-1787948496-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	vc.exe

Executes dropped EXE 1 IoCs

pid	Process
2444	vc.exe

Loads dropped DLL 2 IoCs

pid	Process
1696	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
1696	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe

Modifies system executable filetype association 2 TTPs 2 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	vc.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\VisualStyle = "c:\\windows\\system32\\Desktop.sysm"	vc.exe

Enumerates connected drives 3 TTPs 22 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\K:	vc.exe
File opened (read-only)	\??\M:	vc.exe
File opened (read-only)	\??\L:	vc.exe
File opened (read-only)	\??\T:	vc.exe
File opened (read-only)	\??\U:	vc.exe
File opened (read-only)	\??\W:	vc.exe
File opened (read-only)	\??\Z:	vc.exe
File opened (read-only)	\??\G:	vc.exe
File opened (read-only)	\??\I:	vc.exe
File opened (read-only)	\??\J:	vc.exe
File opened (read-only)	\??\R:	vc.exe
File opened (read-only)	\??\E:	vc.exe
File opened (read-only)	\??\H:	vc.exe
File opened (read-only)	\??\O:	vc.exe
File opened (read-only)	\??\Q:	vc.exe
File opened (read-only)	\??\S:	vc.exe
File opened (read-only)	\??\V:	vc.exe
File opened (read-only)	\??\X:	vc.exe
File opened (read-only)	\??\Y:	vc.exe
File opened (read-only)	\??\B:	vc.exe
File opened (read-only)	\??\N:	vc.exe
File opened (read-only)	\??\P:	vc.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File created	\??\c:\windows\SysWOW64\Windows 3D.scr	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
File opened for modification	\??\c:\windows\SysWOW64\maxtrox.txt	vc.exe
File opened for modification	\??\c:\windows\SysWOW64\Windows 3D.scr	vc.exe
File created	\??\c:\windows\SysWOW64\Desktop.sysm	vc.exe
File created	\??\c:\windows\SysWOW64\CommandPrompt.Sysm	vc.exe
File created	\??\c:\windows\SysWOW64\maxtrox.txt	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe

Drops file in Program Files directory 62 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\Windows Media Player\wmprph.exe	vc.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmpnscfg.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\firefox.exe	vc.exe
File created	\??\c:\Program Files\Mozilla Firefox\maintenanceservice_installer.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\minidump-analyzer.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\default-browser-agent.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\maintenanceservice.exe	vc.exe
File created	\??\c:\Program Files\Mozilla Firefox\minidump-analyzer.exe	vc.exe
File opened for modification	\??\c:\Program Files\Internet Explorer\iexplore.exe	vc.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmlaunch.exe	vc.exe
File opened for modification	\??\c:\Program Files\7-Zip\7zG.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\updater.exe	vc.exe
File opened for modification	\??\c:\Program Files\Windows Journal\PDIALOG.exe	vc.exe
File opened for modification	\??\c:\Program Files\Windows Mail\wab.exe	vc.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\WMPSideShowGadget.exe	vc.exe
File created	\??\c:\Program Files\Mozilla Firefox\crashreporter.exe	vc.exe
File opened for modification	\??\c:\Program Files\Internet Explorer\ielowutil.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\minidump-analyzer.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\pingsender.exe	vc.exe
File created	\??\c:\Program Files\Mozilla Firefox\pingsender.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\updater.exe	vc.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmpconfig.exe	vc.exe
File opened for modification	\??\c:\Program Files\Internet Explorer\ieinstal.exe	vc.exe
File opened for modification	\??\c:\Program Files\Internet Explorer\iediagcmd.exe	vc.exe
File opened for modification	\??\c:\Program Files\7-Zip\Uninstall.exe	vc.exe
File opened for modification	\??\c:\Program Files\Windows Defender\MSASCui.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\crashreporter.exe	vc.exe
File created	\??\c:\Program Files\Mozilla Firefox\firefox.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\maintenanceservice.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\private_browsing.exe	vc.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmpnetwk.exe	vc.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmpshare.exe	vc.exe
File opened for modification	\??\c:\Program Files\7-Zip\7zFM.exe	vc.exe
File opened for modification	\??\c:\Program Files\7-Zip\7zFM.exe	vc.exe
File created	\??\c:\Program Files\7-Zip\Uninstall.exe	vc.exe
File created	\??\c:\Program Files\Mozilla Firefox\default-browser-agent.exe	vc.exe
File opened for modification	\??\c:\Program Files\Windows Mail\wabmig.exe	vc.exe
File opened for modification	\??\c:\Program Files\Windows Sidebar\sidebar.exe	vc.exe
File created	\??\c:\Program Files\7-Zip\7z.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\plugin-container.exe	vc.exe
File created	\??\c:\Program Files\Mozilla Firefox\updater.exe	vc.exe
File opened for modification	\??\c:\Program Files\7-Zip\7z.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\pingsender.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\maintenanceservice_installer.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\plugin-container.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\crashreporter.exe	vc.exe
File created	\??\c:\Program Files\7-Zip\7zG.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\default-browser-agent.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\firefox.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\maintenanceservice_installer.exe	vc.exe
File opened for modification	\??\c:\Program Files\7-Zip\7z.exe	vc.exe
File opened for modification	\??\c:\Program Files\7-Zip\Uninstall.exe	vc.exe
File created	\??\c:\Program Files\Mozilla Firefox\private_browsing.exe	vc.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\private_browsing.exe	vc.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\WMPDMC.exe	vc.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmpenc.exe	vc.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmplayer.exe	vc.exe
File created	\??\c:\Program Files\7-Zip\7zFM.exe	vc.exe
File created	\??\c:\Program Files\Mozilla Firefox\maintenanceservice.exe	vc.exe
File created	\??\c:\Program Files\Mozilla Firefox\plugin-container.exe	vc.exe
File opened for modification	\??\c:\Program Files\Windows Defender\MpCmdRun.exe	vc.exe
File opened for modification	\??\c:\Program Files\7-Zip\7zG.exe	vc.exe

Modifies registry class 36 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command\ = "%1"	vc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command	vc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\NeverShowExt	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command\ = "%1"	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command\ = "%1"	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\ = "Microsoft System Direct"	vc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\NeverShowExt	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon\ = "c:\\windows\\SysWow64\\rasphone.exe"	vc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\ = "System Mechanic"	vc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command\ = "%1"	vc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon\ = "c:\\windows\\SysWow64\\netsetup.exe"	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command	vc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon\ = "c:\\windows\\SysWow64\\rasphone.exe"	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\ = "System Mechanic"	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	vc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon	vc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm	vc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\NeverShowExt	vc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\NeverShowExt	vc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon\ = "c:\\windows\\SysWow64\\netsetup.exe"	vc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\ = "Microsoft System Direct"	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	vc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd	vc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon	vc.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1696	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
2444	vc.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1696 wrote to memory of 2444	1696	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe	27
PID 1696 wrote to memory of 2444	1696	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe	27
PID 1696 wrote to memory of 2444	1696	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe	27
PID 1696 wrote to memory of 2444	1696	170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe	27

C:\Users\Admin\AppData\Local\Temp\170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe
"C:\Users\Admin\AppData\Local\Temp\170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d.exe"
1⤵
- Modifies visibility of file extensions in Explorer
- Modifies visiblity of hidden/system files in Explorer
- Loads dropped DLL
- Modifies system executable filetype association
- Drops file in System32 directory
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1696
- \??\c:\Documents and Settings\Admin\Application Data\Microsoft\vc.exe
  "c:\Documents and Settings\Admin\Application Data\Microsoft\vc.exe" 170b721a9b25607c0c7dbaa962201bfea68d171598e2dc514f901b557daa045d
  2⤵
  - Modifies visibility of file extensions in Explorer
  - Modifies visiblity of hidden/system files in Explorer
  - Executes dropped EXE
  - Modifies system executable filetype association
  - Adds Run key to start application
  - Enumerates connected drives
  - Drops file in System32 directory
  - Drops file in Program Files directory
  - Modifies registry class
  - Suspicious use of SetWindowsHookEx
  PID:2444

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\??\c:\windows\SysWOW64\maxtrox.txt

Filesize
8B

MD5
24865ca220aa1936cbac0a57685217c5

SHA1
37f687cafe79e91eae6cbdffbf2f7ad3975f5e83

SHA256
841e95fa333ed89085bfbab19bb658d96ed0c837d25721411233fa55c860c743

SHA512
c8d3f514c72f48fed5de9582c4252cf5466a9d32866d8df3631ba9274ed734bb95139e4909e8116a10947fc1afa1dbeb33809da6ec050e6e4eb83d5241aeb062

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\Users\Admin\AppData\Roaming\Microsoft\vc.exe

Filesize
76KB

MD5
eed77344ea3e7c23b9b031458c313f99

SHA1
a149a287af0c5c94eeeec8775272f9fab9eed51e

SHA256
3da25ce982322f9644fca0ccae834f009a751379beb9b0f091e2ac6212e34174

SHA512
e7dfdca99ec6b81df6d1abf46aa3b70dbcdab2de9cb9eb1fb60eecd8de2a8b04bac2780f0a4ae07babf65cac9bc940767bfc6fde68464ec997d4e9773ca72cc5

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads