53ead46fd6527c5e97e29944d6c40302be0b63192d00c1646939330fb2d319c0

Analysis

max time kernel
117s
max time network
140s
platform
windows10_x64
resource
win10v200430
submitted
26/06/2020, 08:58

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General

Target

aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe
Size

1.1MB
MD5

13e623cdfb75d99ea7e04c6157ca8ae6
SHA1

f25f0b369a355f30f5e11ac11a7f644bcfefd963
SHA256

aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772
SHA512

ea6b5c882a5298e527be1f3c40cc6d75c56453dd0111d7e9818c28fa7ec32feb19f17cab9a9e49eb0ab9f3a987f7dcc5cadfea7ae99a996f174b0a89e674f421

Score

9^/10

discovery exploit ransomware persistence

Malware Config

Signatures

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3612	takeown.exe
3856	icacls.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
3612	takeown.exe
3856	icacls.exe

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
3788	attrib.exe
1412	attrib.exe
2124	attrib.exe

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

File Deletion
T1107

Inhibit System Recovery
T1490

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
2772	vssadmin.exe

Executes dropped EXE 2 IoCs

pid	Process
2140	Classes:bin
3948	Classes.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	3188	vssvc.exe
Token: SeRestorePrivilege	3188	vssvc.exe
Token: SeAuditPrivilege	3188	vssvc.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Classes:bin	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.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\Registry 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\COM+ REGDB Writer	vssvc.exe
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

Drops file in System32 directory 2 IoCs

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

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 2016 wrote to memory of 2140	2016	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	68
PID 2016 wrote to memory of 2140	2016	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	68
PID 2016 wrote to memory of 2140	2016	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	68
PID 2140 wrote to memory of 2772	2140	Classes:bin	71
PID 2140 wrote to memory of 2772	2140	Classes:bin	71
PID 2140 wrote to memory of 3612	2140	Classes:bin	75
PID 2140 wrote to memory of 3612	2140	Classes:bin	75
PID 2140 wrote to memory of 3612	2140	Classes:bin	75
PID 2140 wrote to memory of 3856	2140	Classes:bin	77
PID 2140 wrote to memory of 3856	2140	Classes:bin	77
PID 2140 wrote to memory of 3856	2140	Classes:bin	77
PID 3948 wrote to memory of 3924	3948	Classes.exe	81
PID 3948 wrote to memory of 3924	3948	Classes.exe	81
PID 3948 wrote to memory of 3924	3948	Classes.exe	81
PID 3924 wrote to memory of 724	3924	cmd.exe	83
PID 3924 wrote to memory of 724	3924	cmd.exe	83
PID 3924 wrote to memory of 724	3924	cmd.exe	83
PID 2140 wrote to memory of 672	2140	Classes:bin	84
PID 2140 wrote to memory of 672	2140	Classes:bin	84
PID 2140 wrote to memory of 672	2140	Classes:bin	84
PID 2016 wrote to memory of 640	2016	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	86
PID 2016 wrote to memory of 640	2016	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	86
PID 2016 wrote to memory of 640	2016	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	86
PID 672 wrote to memory of 932	672	cmd.exe	88
PID 672 wrote to memory of 932	672	cmd.exe	88
PID 672 wrote to memory of 932	672	cmd.exe	88
PID 640 wrote to memory of 1348	640	cmd.exe	89
PID 640 wrote to memory of 1348	640	cmd.exe	89
PID 640 wrote to memory of 1348	640	cmd.exe	89
PID 3924 wrote to memory of 3788	3924	cmd.exe	93
PID 3924 wrote to memory of 3788	3924	cmd.exe	93
PID 3924 wrote to memory of 3788	3924	cmd.exe	93
PID 640 wrote to memory of 1412	640	cmd.exe	94
PID 640 wrote to memory of 1412	640	cmd.exe	94
PID 640 wrote to memory of 1412	640	cmd.exe	94
PID 672 wrote to memory of 2124	672	cmd.exe	95
PID 672 wrote to memory of 2124	672	cmd.exe	95
PID 672 wrote to memory of 2124	672	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe
"C:\Users\Admin\AppData\Local\Temp\aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe"
1⤵
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:2016
- C:\Users\Admin\AppData\Roaming\Classes:bin
  C:\Users\Admin\AppData\Roaming\Classes:bin -r
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:2140
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:2772
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Classes.exe
    3⤵
    - Modifies file permissions
    - Possible privilege escalation attempt
    PID:3612
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Classes.exe /reset
    3⤵
    - Modifies file permissions
    - Possible privilege escalation attempt
    PID:3856
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Classes" & del "C:\Users\Admin\AppData\Roaming\Classes"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:672
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:932
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Classes"
      4⤵
      Views/modifies file attributes
      PID:2124
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe" & del "C:\Users\Admin\AppData\Local\Temp\aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:640
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:1348
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe"
    3⤵
    - Views/modifies file attributes
    PID:1412

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
- Modifies service
PID:3188

C:\Windows\SysWOW64\Classes.exe
C:\Windows\SysWOW64\Classes.exe -s
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3948
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Classes.exe" & del "C:\Windows\SysWOW64\Classes.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3924
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:724
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Classes.exe"
    3⤵
    - Views/modifies file attributes
    - Drops file in System32 directory
    PID:3788

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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