5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367

Analysis

max time kernel
43s
max time network
55s
platform
windows7_x64
resource
win7v200430
submitted
25-06-2020 05:31

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General

Target

5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe
Size

1.0MB
MD5

572fea5f025df78f2d316216fbeee52e
SHA1

91b2bf44b1f9282c09f07f16631deaa3ad9d956d
SHA256

5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367
SHA512

eb238272227c5825477ff1e37dc4f7e467665049d4db5649fff59c39d7745e88b06234d6d1218c05c802e33e21577f9d4a533cb9e23ebe6fb09654f97759c187

Score

9^/10

ransomware persistence discovery exploit

Malware Config

Signatures

Interacts with shadow copies 2 TTPs 1 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1107

Inhibit System Recovery

T1490

pid	Process
1092	vssadmin.exe

Modifies service 2 TTPs 5 IoCs

persistence

Modify Registry

T1112

Modify Existing Service

T1031

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\ASR Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Shadow Copy Optimization Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\SwProvider_{b5946137-7b9f-4925-af80-51abd60b20d5}	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Registry Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\COM+ REGDB Writer	vssvc.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1812	takeown.exe
1832	icacls.exe

Loads dropped DLL 2 IoCs

pid	Process
1412	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe
1412	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 1412 wrote to memory of 1448	1412	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	24
PID 1412 wrote to memory of 1448	1412	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	24
PID 1412 wrote to memory of 1448	1412	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	24
PID 1412 wrote to memory of 1448	1412	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	24
PID 1448 wrote to memory of 1092	1448	Usbstor:bin	25
PID 1448 wrote to memory of 1092	1448	Usbstor:bin	25
PID 1448 wrote to memory of 1092	1448	Usbstor:bin	25
PID 1448 wrote to memory of 1092	1448	Usbstor:bin	25
PID 1448 wrote to memory of 1812	1448	Usbstor:bin	29
PID 1448 wrote to memory of 1812	1448	Usbstor:bin	29
PID 1448 wrote to memory of 1812	1448	Usbstor:bin	29
PID 1448 wrote to memory of 1812	1448	Usbstor:bin	29
PID 1448 wrote to memory of 1832	1448	Usbstor:bin	31
PID 1448 wrote to memory of 1832	1448	Usbstor:bin	31
PID 1448 wrote to memory of 1832	1448	Usbstor:bin	31
PID 1448 wrote to memory of 1832	1448	Usbstor:bin	31
PID 1448 wrote to memory of 1768	1448	Usbstor:bin	34
PID 1448 wrote to memory of 1768	1448	Usbstor:bin	34
PID 1448 wrote to memory of 1768	1448	Usbstor:bin	34
PID 1448 wrote to memory of 1768	1448	Usbstor:bin	34
PID 1412 wrote to memory of 1788	1412	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	35
PID 1412 wrote to memory of 1788	1412	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	35
PID 1412 wrote to memory of 1788	1412	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	35
PID 1412 wrote to memory of 1788	1412	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	35
PID 1768 wrote to memory of 1604	1768	cmd.exe	38
PID 1768 wrote to memory of 1604	1768	cmd.exe	38
PID 1768 wrote to memory of 1604	1768	cmd.exe	38
PID 1768 wrote to memory of 1604	1768	cmd.exe	38
PID 1788 wrote to memory of 1588	1788	cmd.exe	39
PID 1788 wrote to memory of 1588	1788	cmd.exe	39
PID 1788 wrote to memory of 1588	1788	cmd.exe	39
PID 1788 wrote to memory of 1588	1788	cmd.exe	39
PID 1768 wrote to memory of 1580	1768	cmd.exe	40
PID 1768 wrote to memory of 1580	1768	cmd.exe	40
PID 1768 wrote to memory of 1580	1768	cmd.exe	40
PID 1768 wrote to memory of 1580	1768	cmd.exe	40
PID 1788 wrote to memory of 1568	1788	cmd.exe	41
PID 1788 wrote to memory of 1568	1788	cmd.exe	41
PID 1788 wrote to memory of 1568	1788	cmd.exe	41
PID 1788 wrote to memory of 1568	1788	cmd.exe	41

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	788	vssvc.exe
Token: SeRestorePrivilege	788	vssvc.exe
Token: SeAuditPrivilege	788	vssvc.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Usbstor:bin	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe

Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
1812	takeown.exe
1832	icacls.exe

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
1580	attrib.exe
1568	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
1448	Usbstor:bin

Deletes itself 1 IoCs

pid	Process
1788	cmd.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Usbstor.exe	Usbstor:bin

C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe
"C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
- NTFS ADS
PID:1412
- C:\Users\Admin\AppData\Roaming\Usbstor:bin
  C:\Users\Admin\AppData\Roaming\Usbstor:bin -r
  2⤵
  - Suspicious use of WriteProcessMemory
  - Executes dropped EXE
  - Drops file in System32 directory
  PID:1448
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:1092
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Usbstor.exe
    3⤵
    - Modifies file permissions
    - Possible privilege escalation attempt
    PID:1812
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Usbstor.exe /reset
    3⤵
    - Modifies file permissions
    - Possible privilege escalation attempt
    PID:1832
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Usbstor" & del "C:\Users\Admin\AppData\Roaming\Usbstor"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1768
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:1604
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Usbstor"
      4⤵
      Views/modifies file attributes
      PID:1580
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe" & del "C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  - Deletes itself
  PID:1788
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:1588
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe"
    3⤵
    - Views/modifies file attributes
    PID:1568

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
PID:788

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Modify Existing Service

T1031

Privilege Escalation

Defense Evasion

File Deletion

T1107

File and Directory Permissions Modification

T1222

Hidden Files and Directories

T1158

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

T1490

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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