4f9f1934dda720b8af44a52ad1b0b3db6c5ed324e051b65718ce75da79f57569

General

Target

4f9f1934dda720b8af44a52ad1b0b3db6c5ed324e051b65718ce75da79f57569.exe
Size

569KB
MD5

0eab2d9bc5d399eea1b7226ef901b7f9
SHA1

ef85ad30b9a0cb932594d55dc167df302735e980
SHA256

4f9f1934dda720b8af44a52ad1b0b3db6c5ed324e051b65718ce75da79f57569
SHA512

54b60964740f291ffae09053f77227873c707227274625e1b773f85ab727694f51bf47bfc67ecaf420bd4c0b3286ff75555d4ea31aeab4e7e3c61e23c21e13d3
SSDEEP

6144:N8bS/QTjhUqBfxrwEnuNcSsm7IoYGW0VvBXCAt6kihwE+VDpJYWmlwnx9zHk0:mQtqB5urTIoYWBQk1E+VF9mOx9Q0

Score

9^/10

Malware Config

Signatures

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Windows Update.exe	MailPassView
C:\Users\Admin\AppData\Roaming\Windows Update.exe	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Windows Update.exe	WebBrowserPassView
C:\Users\Admin\AppData\Roaming\Windows Update.exe	WebBrowserPassView

Nirsoft 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Windows Update.exe	Nirsoft
C:\Users\Admin\AppData\Roaming\Windows Update.exe	Nirsoft

Executes dropped EXE 1 IoCs

Processes:

Windows Update.exe

pid process

4212 Windows Update.exe

pid	process
4212	Windows Update.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

4f9f1934dda720b8af44a52ad1b0b3db6c5ed324e051b65718ce75da79f57569.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	4f9f1934dda720b8af44a52ad1b0b3db6c5ed324e051b65718ce75da79f57569.exe

Drops file in Windows directory 1 IoCs

Processes:

dw20.exe

description ioc process

File created C:\Windows\AppCompat\Programs\Amcache.hve.tmp dw20.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	ioc	process
File created	C:\Windows\AppCompat\Programs\Amcache.hve.tmp	dw20.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

dw20.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

dw20.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

dw20.exe

description	pid	process
Token: SeRestorePrivilege	3700	dw20.exe
Token: SeBackupPrivilege	3700	dw20.exe
Token: SeBackupPrivilege	3700	dw20.exe
Token: SeBackupPrivilege	3700	dw20.exe
Token: SeBackupPrivilege	3700	dw20.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

4f9f1934dda720b8af44a52ad1b0b3db6c5ed324e051b65718ce75da79f57569.exeWindows Update.exe

description	pid	process	target process
PID 3512 wrote to memory of 4212	3512	4f9f1934dda720b8af44a52ad1b0b3db6c5ed324e051b65718ce75da79f57569.exe	Windows Update.exe
PID 3512 wrote to memory of 4212	3512	4f9f1934dda720b8af44a52ad1b0b3db6c5ed324e051b65718ce75da79f57569.exe	Windows Update.exe
PID 3512 wrote to memory of 4212	3512	4f9f1934dda720b8af44a52ad1b0b3db6c5ed324e051b65718ce75da79f57569.exe	Windows Update.exe
PID 4212 wrote to memory of 3700	4212	Windows Update.exe	dw20.exe
PID 4212 wrote to memory of 3700	4212	Windows Update.exe	dw20.exe
PID 4212 wrote to memory of 3700	4212	Windows Update.exe	dw20.exe

C:\Users\Admin\AppData\Local\Temp\4f9f1934dda720b8af44a52ad1b0b3db6c5ed324e051b65718ce75da79f57569.exe
"C:\Users\Admin\AppData\Local\Temp\4f9f1934dda720b8af44a52ad1b0b3db6c5ed324e051b65718ce75da79f57569.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3512

C:\Users\Admin\AppData\Roaming\Windows Update.exe
"C:\Users\Admin\AppData\Roaming\Windows Update.exe"
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4212

C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
dw20.exe -x -s 1276
3⤵
- Drops file in Windows directory
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:3700

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

4

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Windows Update.exe
Filesize
569KB

MD5
0eab2d9bc5d399eea1b7226ef901b7f9

SHA1
ef85ad30b9a0cb932594d55dc167df302735e980

SHA256
4f9f1934dda720b8af44a52ad1b0b3db6c5ed324e051b65718ce75da79f57569

SHA512
54b60964740f291ffae09053f77227873c707227274625e1b773f85ab727694f51bf47bfc67ecaf420bd4c0b3286ff75555d4ea31aeab4e7e3c61e23c21e13d3

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Update.exe
Filesize
569KB

MD5
0eab2d9bc5d399eea1b7226ef901b7f9

SHA1
ef85ad30b9a0cb932594d55dc167df302735e980

SHA256
4f9f1934dda720b8af44a52ad1b0b3db6c5ed324e051b65718ce75da79f57569

SHA512
54b60964740f291ffae09053f77227873c707227274625e1b773f85ab727694f51bf47bfc67ecaf420bd4c0b3286ff75555d4ea31aeab4e7e3c61e23c21e13d3

Download Submit
memory/3512-132-0x0000000074AE0000-0x0000000075091000-memory.dmp

Filesize
5.7MB

Download
memory/3512-133-0x0000000074AE0000-0x0000000075091000-memory.dmp

Filesize
5.7MB

Download
memory/3512-138-0x0000000074AE0000-0x0000000075091000-memory.dmp

Filesize
5.7MB

Download
memory/3700-140-0x0000000000000000-mapping.dmp

Download
memory/4212-134-0x0000000000000000-mapping.dmp

Download
memory/4212-137-0x0000000074AE0000-0x0000000075091000-memory.dmp

Filesize
5.7MB

Download
memory/4212-139-0x0000000074AE0000-0x0000000075091000-memory.dmp

Filesize
5.7MB

Download
memory/4212-141-0x0000000074AE0000-0x0000000075091000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads