a21e1d6867a6a5b99a771f6f87dd3a089b217897f12f591965ab4fe1dabe4f5b

Analysis

max time kernel
66s
max time network
71s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
30-12-2023 13:56

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General

Target

1ab861c18a6da7c284976efdd2074262.exe
Size

76KB
MD5

1ab861c18a6da7c284976efdd2074262
SHA1

14177f15beb8c34836ae09fa340174c6b0fbcca3
SHA256

a21e1d6867a6a5b99a771f6f87dd3a089b217897f12f591965ab4fe1dabe4f5b
SHA512

87862fc66efe33c757cde48d87bc476fc43dde9331e8e6b245131ecae7604d1b85d1b63e4a76fe192759cbcb0d879c4989caaf231528ed05cf0eda03a054b43a
SSDEEP

768:9ZVy+DZ4mV+RMO2rhgFwuqCbxTGy/BBGg4NKhLU4dhbDW2+Kv00dX0vN0TlT+Xya:/amlu3hbBGy3G8nhMpDz

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-1-5-21-3803511929-1339359695-2191195476-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	1ab861c18a6da7c284976efdd2074262.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	hama.exe

Executes dropped EXE 1 IoCs

pid	Process
4712	hama.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	1ab861c18a6da7c284976efdd2074262.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	hama.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"	hama.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)	\??\Z:	hama.exe
File opened (read-only)	\??\J:	hama.exe
File opened (read-only)	\??\Q:	hama.exe
File opened (read-only)	\??\U:	hama.exe
File opened (read-only)	\??\S:	hama.exe
File opened (read-only)	\??\V:	hama.exe
File opened (read-only)	\??\W:	hama.exe
File opened (read-only)	\??\L:	hama.exe
File opened (read-only)	\??\M:	hama.exe
File opened (read-only)	\??\N:	hama.exe
File opened (read-only)	\??\O:	hama.exe
File opened (read-only)	\??\T:	hama.exe
File opened (read-only)	\??\X:	hama.exe
File opened (read-only)	\??\Y:	hama.exe
File opened (read-only)	\??\E:	hama.exe
File opened (read-only)	\??\G:	hama.exe
File opened (read-only)	\??\I:	hama.exe
File opened (read-only)	\??\P:	hama.exe
File opened (read-only)	\??\R:	hama.exe
File opened (read-only)	\??\B:	hama.exe
File opened (read-only)	\??\H:	hama.exe
File opened (read-only)	\??\K:	hama.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File created	\??\c:\windows\SysWOW64\maxtrox.txt	1ab861c18a6da7c284976efdd2074262.exe
File created	\??\c:\windows\SysWOW64\Windows 3D.scr	1ab861c18a6da7c284976efdd2074262.exe
File opened for modification	\??\c:\windows\SysWOW64\maxtrox.txt	hama.exe
File opened for modification	\??\c:\windows\SysWOW64\Windows 3D.scr	hama.exe
File created	\??\c:\windows\SysWOW64\Desktop.sysm	hama.exe
File created	\??\c:\windows\SysWOW64\CommandPrompt.Sysm	hama.exe

Drops file in Program Files directory 27 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\Mozilla Firefox\pingsender.exe	hama.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\minidump-analyzer.exe	hama.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmplayer.exe	hama.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\maintenanceservice.exe	hama.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmpconfig.exe	hama.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmpnetwk.exe	hama.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\plugin-container.exe	hama.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmlaunch.exe	hama.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmpnscfg.exe	hama.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmprph.exe	hama.exe
File opened for modification	\??\c:\Program Files\Internet Explorer\ieinstal.exe	hama.exe
File opened for modification	\??\c:\Program Files\Internet Explorer\iexplore.exe	hama.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\firefox.exe	hama.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\maintenanceservice_installer.exe	hama.exe
File opened for modification	\??\c:\Program Files\7-Zip\7zFM.exe	hama.exe
File opened for modification	\??\c:\Program Files\Internet Explorer\iediagcmd.exe	hama.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\crashreporter.exe	hama.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\setup_wm.exe	hama.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\private_browsing.exe	hama.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmpshare.exe	hama.exe
File opened for modification	\??\c:\Program Files\7-Zip\7z.exe	hama.exe
File opened for modification	\??\c:\Program Files\7-Zip\7zG.exe	hama.exe
File opened for modification	\??\c:\Program Files\7-Zip\Uninstall.exe	hama.exe
File opened for modification	\??\c:\Program Files\Internet Explorer\ielowutil.exe	hama.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\default-browser-agent.exe	hama.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\updater.exe	hama.exe
File opened for modification	\??\c:\Program Files\Windows Mail\wabmig.exe	hama.exe

Modifies registry class 36 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\NeverShowExt	1ab861c18a6da7c284976efdd2074262.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	hama.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command	hama.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command\ = "%1"	hama.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	1ab861c18a6da7c284976efdd2074262.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon	1ab861c18a6da7c284976efdd2074262.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\NeverShowExt	hama.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm	hama.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command\ = "%1"	hama.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon	hama.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command	1ab861c18a6da7c284976efdd2074262.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command	1ab861c18a6da7c284976efdd2074262.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon	hama.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon\ = "c:\\windows\\SysWow64\\rasphone.exe"	hama.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\ = "System Mechanic"	hama.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon\ = "c:\\windows\\SysWow64\\netsetup.exe"	hama.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	1ab861c18a6da7c284976efdd2074262.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd	1ab861c18a6da7c284976efdd2074262.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open	1ab861c18a6da7c284976efdd2074262.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command\ = "%1"	1ab861c18a6da7c284976efdd2074262.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\NeverShowExt	hama.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon	1ab861c18a6da7c284976efdd2074262.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm	1ab861c18a6da7c284976efdd2074262.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	hama.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\ = "Microsoft System Direct"	hama.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell	1ab861c18a6da7c284976efdd2074262.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open	1ab861c18a6da7c284976efdd2074262.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command\ = "%1"	1ab861c18a6da7c284976efdd2074262.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd	hama.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon\ = "c:\\windows\\SysWow64\\netsetup.exe"	1ab861c18a6da7c284976efdd2074262.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell	1ab861c18a6da7c284976efdd2074262.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command	hama.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\ = "Microsoft System Direct"	1ab861c18a6da7c284976efdd2074262.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon\ = "c:\\windows\\SysWow64\\rasphone.exe"	1ab861c18a6da7c284976efdd2074262.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\ = "System Mechanic"	1ab861c18a6da7c284976efdd2074262.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\NeverShowExt	1ab861c18a6da7c284976efdd2074262.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1236	1ab861c18a6da7c284976efdd2074262.exe
4712	hama.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1236 wrote to memory of 4712	1236	1ab861c18a6da7c284976efdd2074262.exe	23
PID 1236 wrote to memory of 4712	1236	1ab861c18a6da7c284976efdd2074262.exe	23
PID 1236 wrote to memory of 4712	1236	1ab861c18a6da7c284976efdd2074262.exe	23

C:\Users\Admin\AppData\Local\Temp\1ab861c18a6da7c284976efdd2074262.exe
"C:\Users\Admin\AppData\Local\Temp\1ab861c18a6da7c284976efdd2074262.exe"
1⤵
- Modifies visibility of file extensions in Explorer
- Modifies system executable filetype association
- Drops file in System32 directory
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1236
- \??\c:\Documents and Settings\Admin\Application Data\Microsoft\hama.exe
  "c:\Documents and Settings\Admin\Application Data\Microsoft\hama.exe" 1ab861c18a6da7c284976efdd2074262
  2⤵
  - Modifies visibility of file extensions 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:4712