f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e

General

Target

f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Size

76KB
MD5

1ab8896bb25a622300c1b1e3ddf1ade8
SHA1

e2279944cdfb2cf758f7ffafc224419f37f9983d
SHA256

f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e
SHA512

f79ca7d67aca6d1f52b1120e8f7653ad6f96a1f69340eff249bebbf77f2bfb7325ed0725eeb7d365dc15aff303da3426597c5e20b3e95a0ffd35cdeb6e726667
SSDEEP

768:fe8bNRqsuhlGOBnhgFwumSCbxTGy/BBGg4NKJJKqUThbJ32+ve7i40vN0TlT+Xk6:3nqJu3abBGy3G8V0iuoKz

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies system executable filetype association 2 TTPs 2 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1042

Processes:

f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exehdsa.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	hdsa.exe

Modifies visibility of file extensions in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

Processes:

f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exehdsa.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	hdsa.exe

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

evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

Processes:

f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exehdsa.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	hdsa.exe

Executes dropped EXE 1 IoCs

Processes:

hdsa.exe

pid process

3316 hdsa.exe

pid	process
3316	hdsa.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

hdsa.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	hdsa.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\VisualStyle = "c:\\windows\\system32\\Desktop.sysm"	hdsa.exe

Enumerates connected drives 3 TTPs 23 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

Processes:

hdsa.exe

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

Drops file in System32 directory 6 IoCs

Processes:

hdsa.exef43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe

description	ioc	process
File opened for modification	\??\c:\windows\SysWOW64\Windows 3D.scr	hdsa.exe
File created	\??\c:\windows\SysWOW64\Desktop.sysm	hdsa.exe
File created	\??\c:\windows\SysWOW64\CommandPrompt.Sysm	hdsa.exe
File created	\??\c:\windows\SysWOW64\maxtrox.txt	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
File created	\??\c:\windows\SysWOW64\Windows 3D.scr	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
File opened for modification	\??\c:\windows\SysWOW64\maxtrox.txt	hdsa.exe

Drops file in Program Files directory 27 IoCs

Processes:

hdsa.exe

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

Modifies registry class 36 IoCs

Processes:

f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exehdsa.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\ = "Microsoft System Direct"	hdsa.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\NeverShowExt	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\NeverShowExt	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	hdsa.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon\ = "c:\\windows\\SysWow64\\rasphone.exe"	hdsa.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command	hdsa.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\NeverShowExt	hdsa.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command\ = "%1"	hdsa.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\ = "Microsoft System Direct"	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command\ = "%1"	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd	hdsa.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command	hdsa.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon	hdsa.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command\ = "%1"	hdsa.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm	hdsa.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon\ = "c:\\windows\\SysWow64\\netsetup.exe"	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\ = "System Mechanic"	hdsa.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon\ = "c:\\windows\\SysWow64\\netsetup.exe"	hdsa.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon\ = "c:\\windows\\SysWow64\\rasphone.exe"	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\ = "System Mechanic"	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\NeverShowExt	hdsa.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command\ = "%1"	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	hdsa.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon	hdsa.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exehdsa.exe

pid process

1608 f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
3316 hdsa.exe

pid	process
1608	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
3316	hdsa.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe

description	pid	process	target process
PID 1608 wrote to memory of 3316	1608	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe	hdsa.exe
PID 1608 wrote to memory of 3316	1608	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe	hdsa.exe
PID 1608 wrote to memory of 3316	1608	f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe	hdsa.exe

C:\Users\Admin\AppData\Local\Temp\f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe
"C:\Users\Admin\AppData\Local\Temp\f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e.exe"
1⤵
- Modifies system executable filetype association
- Modifies visibility of file extensions in Explorer
- Modifies visiblity of hidden/system files in Explorer
- Drops file in System32 directory
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1608

\??\c:\Documents and Settings\Admin\Application Data\Microsoft\hdsa.exe
"c:\Documents and Settings\Admin\Application Data\Microsoft\hdsa.exe" f43e4b0db9733dd30105c2a16c9a2b6066ad7c00b5fdadf4f700b088416d3f9e
2⤵
- Modifies system executable filetype association
- Modifies visibility of file extensions in Explorer
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- 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:3316

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Change Default File Association

1

T1042

Hidden Files and Directories

2

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\hdsa.exe

Filesize
76KB

MD5
86cde364a1244f34c132f23ec10c6a47

SHA1
10ad08ece9e5f9ce51bc774e957f4ab8b58a9d46

SHA256
94a8fdfe9186cb7f36f1bd0f35961d244cf7c3429ca9353ecdbb908ea59ef3b1

SHA512
8c63f4cd002afa2c24f45329b1ab0da4d437f6e6bd2f9cc37e3bebb69283e6363516e9d89e396101451e7dd1cbc4a92be190e71aa3a68750e9cee54147bd7483

Download Submit
\??\c:\Documents and Settings\Admin\Application Data\Microsoft\hdsa.exe

Filesize
76KB

MD5
86cde364a1244f34c132f23ec10c6a47

SHA1
10ad08ece9e5f9ce51bc774e957f4ab8b58a9d46

SHA256
94a8fdfe9186cb7f36f1bd0f35961d244cf7c3429ca9353ecdbb908ea59ef3b1

SHA512
8c63f4cd002afa2c24f45329b1ab0da4d437f6e6bd2f9cc37e3bebb69283e6363516e9d89e396101451e7dd1cbc4a92be190e71aa3a68750e9cee54147bd7483

Download Submit
\??\c:\windows\SysWOW64\Windows 3D.scr

Filesize
76KB

MD5
ff33169b4df879120dafdc960622f919

SHA1
c0724995dd3648f1e1c685d667307bb87d35b4f2

SHA256
d265a325c3744230712931b156e3f095f4a87829c8d245e2e1f2e9460586f18b

SHA512
52d59c8070320934281bd60dc8c3d2cd1330f02f7881c1c6eba596e0f76b598d81015c956618e1917e3b533a02cea7ddd94164a9119819ad24f0d8d314edc09f

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

Filesize
8B

MD5
24865ca220aa1936cbac0a57685217c5

SHA1
37f687cafe79e91eae6cbdffbf2f7ad3975f5e83

SHA256
841e95fa333ed89085bfbab19bb658d96ed0c837d25721411233fa55c860c743

SHA512
c8d3f514c72f48fed5de9582c4252cf5466a9d32866d8df3631ba9274ed734bb95139e4909e8116a10947fc1afa1dbeb33809da6ec050e6e4eb83d5241aeb062

Download Submit
memory/3316-134-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads