wastedlocker | 8897db876553f942b2eb4005f8475a232bafb82a50ca7761a621842e894a3d80

Analysis

max time kernel
32s
max time network
128s
platform
windows10_x64
resource
win10v20210410
submitted
26-07-2021 12:42

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General

Target

8897db876553f942b2eb4005f8475a232bafb82a50ca7761a621842e894a3d80.sample.exe
Size

56KB
MD5

ecb00e9a61f99a7d4c90723294986bbc
SHA1

be59c867da75e2a66b8c2519e950254f817cd4ad
SHA256

8897db876553f942b2eb4005f8475a232bafb82a50ca7761a621842e894a3d80
SHA512

9dee79827d865de41a63962b419eed7e1f9610ff27f00f8b7b2b9f51e905d5db907d310da590d8f1a11ac88e549373edf39bffdb44d1b205728f1b5e0a43aa5e

Score

10^/10

wastedlocker discovery exploit ransomware

Malware Config

Signatures

WastedLocker
Ransomware family seen in the wild since May 2020.
ransomware wastedlocker
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Executes dropped EXE 2 IoCs

pid	Process
4012	Usbflags:bin
4056	Usbflags.exe

Modifies extensions of user files 24 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File created	C:\Users\Admin\Pictures\OptimizeDebug.tiff.eswasted_info	Usbflags.exe
File opened for modification	C:\Users\Admin\Pictures\OptimizeDebug.tiff.eswasted	Usbflags.exe
File opened for modification	C:\Users\Admin\Pictures\ResolveExpand.tif.eswasted	Usbflags.exe
File renamed	C:\Users\Admin\Pictures\ResumeRename.tif => C:\Users\Admin\Pictures\ResumeRename.tif.eswasted	Usbflags.exe
File created	C:\Users\Admin\Pictures\SyncPing.tif.eswasted_info	Usbflags.exe
File created	C:\Users\Admin\Pictures\UninstallReceive.tif.eswasted_info	Usbflags.exe
File opened for modification	C:\Users\Admin\Pictures\UninstallReceive.tif.eswasted	Usbflags.exe
File created	C:\Users\Admin\Pictures\WatchReceive.tiff.eswasted_info	Usbflags.exe
File renamed	C:\Users\Admin\Pictures\ResolveExpand.tif => C:\Users\Admin\Pictures\ResolveExpand.tif.eswasted	Usbflags.exe
File created	C:\Users\Admin\Pictures\ResumeRename.tif.eswasted_info	Usbflags.exe
File opened for modification	C:\Users\Admin\Pictures\ResumeRename.tif.eswasted	Usbflags.exe
File renamed	C:\Users\Admin\Pictures\SyncPing.tif => C:\Users\Admin\Pictures\SyncPing.tif.eswasted	Usbflags.exe
File created	C:\Users\Admin\Pictures\JoinDisconnect.raw.eswasted_info	Usbflags.exe
File created	C:\Users\Admin\Pictures\RepairGet.tiff.eswasted_info	Usbflags.exe
File renamed	C:\Users\Admin\Pictures\RepairGet.tiff => C:\Users\Admin\Pictures\RepairGet.tiff.eswasted	Usbflags.exe
File opened for modification	C:\Users\Admin\Pictures\RepairGet.tiff.eswasted	Usbflags.exe
File created	C:\Users\Admin\Pictures\ResolveExpand.tif.eswasted_info	Usbflags.exe
File opened for modification	C:\Users\Admin\Pictures\SyncPing.tif.eswasted	Usbflags.exe
File renamed	C:\Users\Admin\Pictures\UninstallReceive.tif => C:\Users\Admin\Pictures\UninstallReceive.tif.eswasted	Usbflags.exe
File renamed	C:\Users\Admin\Pictures\WatchReceive.tiff => C:\Users\Admin\Pictures\WatchReceive.tiff.eswasted	Usbflags.exe
File opened for modification	C:\Users\Admin\Pictures\WatchReceive.tiff.eswasted	Usbflags.exe
File renamed	C:\Users\Admin\Pictures\JoinDisconnect.raw => C:\Users\Admin\Pictures\JoinDisconnect.raw.eswasted	Usbflags.exe
File opened for modification	C:\Users\Admin\Pictures\JoinDisconnect.raw.eswasted	Usbflags.exe
File renamed	C:\Users\Admin\Pictures\OptimizeDebug.tiff => C:\Users\Admin\Pictures\OptimizeDebug.tiff.eswasted	Usbflags.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
932	takeown.exe
2232	icacls.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
932	takeown.exe
2232	icacls.exe

Drops file in System32 directory 2 IoCs

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

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
3792	vssadmin.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Usbflags:bin	8897db876553f942b2eb4005f8475a232bafb82a50ca7761a621842e894a3d80.sample.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	2940	vssvc.exe
Token: SeRestorePrivilege	2940	vssvc.exe
Token: SeAuditPrivilege	2940	vssvc.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 3892 wrote to memory of 4012	3892	8897db876553f942b2eb4005f8475a232bafb82a50ca7761a621842e894a3d80.sample.exe	76
PID 3892 wrote to memory of 4012	3892	8897db876553f942b2eb4005f8475a232bafb82a50ca7761a621842e894a3d80.sample.exe	76
PID 3892 wrote to memory of 4012	3892	8897db876553f942b2eb4005f8475a232bafb82a50ca7761a621842e894a3d80.sample.exe	76
PID 4012 wrote to memory of 3792	4012	Usbflags:bin	77
PID 4012 wrote to memory of 3792	4012	Usbflags:bin	77
PID 4012 wrote to memory of 932	4012	Usbflags:bin	81
PID 4012 wrote to memory of 932	4012	Usbflags:bin	81
PID 4012 wrote to memory of 932	4012	Usbflags:bin	81
PID 4012 wrote to memory of 2232	4012	Usbflags:bin	83
PID 4012 wrote to memory of 2232	4012	Usbflags:bin	83
PID 4012 wrote to memory of 2232	4012	Usbflags:bin	83
PID 4056 wrote to memory of 1544	4056	Usbflags.exe	86
PID 4056 wrote to memory of 1544	4056	Usbflags.exe	86
PID 4056 wrote to memory of 1544	4056	Usbflags.exe	86
PID 4012 wrote to memory of 3672	4012	Usbflags:bin	88
PID 4012 wrote to memory of 3672	4012	Usbflags:bin	88
PID 4012 wrote to memory of 3672	4012	Usbflags:bin	88
PID 1544 wrote to memory of 2136	1544	cmd.exe	90
PID 1544 wrote to memory of 2136	1544	cmd.exe	90
PID 1544 wrote to memory of 2136	1544	cmd.exe	90
PID 3892 wrote to memory of 3972	3892	8897db876553f942b2eb4005f8475a232bafb82a50ca7761a621842e894a3d80.sample.exe	92
PID 3892 wrote to memory of 3972	3892	8897db876553f942b2eb4005f8475a232bafb82a50ca7761a621842e894a3d80.sample.exe	92
PID 3892 wrote to memory of 3972	3892	8897db876553f942b2eb4005f8475a232bafb82a50ca7761a621842e894a3d80.sample.exe	92
PID 3672 wrote to memory of 1188	3672	cmd.exe	93
PID 3672 wrote to memory of 1188	3672	cmd.exe	93
PID 3672 wrote to memory of 1188	3672	cmd.exe	93
PID 3972 wrote to memory of 2396	3972	cmd.exe	94
PID 3972 wrote to memory of 2396	3972	cmd.exe	94
PID 3972 wrote to memory of 2396	3972	cmd.exe	94
PID 1544 wrote to memory of 296	1544	cmd.exe	98
PID 1544 wrote to memory of 296	1544	cmd.exe	98
PID 1544 wrote to memory of 296	1544	cmd.exe	98
PID 3672 wrote to memory of 2064	3672	cmd.exe	99
PID 3672 wrote to memory of 2064	3672	cmd.exe	99
PID 3672 wrote to memory of 2064	3672	cmd.exe	99
PID 3972 wrote to memory of 2312	3972	cmd.exe	100
PID 3972 wrote to memory of 2312	3972	cmd.exe	100
PID 3972 wrote to memory of 2312	3972	cmd.exe	100

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
2312	attrib.exe
296	attrib.exe
2064	attrib.exe

C:\Users\Admin\AppData\Local\Temp\8897db876553f942b2eb4005f8475a232bafb82a50ca7761a621842e894a3d80.sample.exe
"C:\Users\Admin\AppData\Local\Temp\8897db876553f942b2eb4005f8475a232bafb82a50ca7761a621842e894a3d80.sample.exe"
1⤵
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:3892
- C:\Users\Admin\AppData\Roaming\Usbflags:bin
  C:\Users\Admin\AppData\Roaming\Usbflags:bin -r
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:4012
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:3792
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Usbflags.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:932
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Usbflags.exe /reset
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:2232
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Usbflags" & del "C:\Users\Admin\AppData\Roaming\Usbflags"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3672
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:1188
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Usbflags"
      4⤵
      Views/modifies file attributes
      PID:2064
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\8897db876553f942b2eb4005f8475a232bafb82a50ca7761a621842e894a3d80.sample.exe" & del "C:\Users\Admin\AppData\Local\Temp\8897db876553f942b2eb4005f8475a232bafb82a50ca7761a621842e894a3d80.sample.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3972
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:2396
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\8897db876553f942b2eb4005f8475a232bafb82a50ca7761a621842e894a3d80.sample.exe"
    3⤵
    - Views/modifies file attributes
    PID:2312

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2940

C:\Windows\SysWOW64\Usbflags.exe
C:\Windows\SysWOW64\Usbflags.exe -s
1⤵
- Executes dropped EXE
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
PID:4056
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Usbflags.exe" & del "C:\Windows\SysWOW64\Usbflags.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1544
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:2136
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Usbflags.exe"
    3⤵
    - Drops file in System32 directory
    - Views/modifies file attributes
    PID:296

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Privilege Escalation

Defense Evasion

File Deletion

T1107

File and Directory Permissions Modification

T1222

Hidden Files and Directories

T1158

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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