wastedlocker | bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8

Analysis

max time kernel
15s
max time network
123s
platform
windows10_x64
resource
win10v20210410
submitted
26-07-2021 13:00

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe
Size

60KB
MD5

0ed2ca539a01cdb86c88a9a1604b2005
SHA1

4fed7eae00bfa21938e49f33b7c6794fd7d0750c
SHA256

bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8
SHA512

34dad101cd7c5f9ff2267674d224986b9274e0e17d9ae665ca1af4ffa57408106238b1e248045465ab17c72a4b92473ab3714aefb705d95f9725a4251379c7e2

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
1400	Lsa:bin
1276	Lsa.exe

Modifies extensions of user files 6 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File created	C:\Users\Admin\Pictures\SelectUnpublish.crw.bbawasted_info	Lsa.exe
File renamed	C:\Users\Admin\Pictures\SelectUnpublish.crw => C:\Users\Admin\Pictures\SelectUnpublish.crw.bbawasted	Lsa.exe
File opened for modification	C:\Users\Admin\Pictures\SelectUnpublish.crw.bbawasted	Lsa.exe
File created	C:\Users\Admin\Pictures\ExportBlock.raw.bbawasted_info	Lsa.exe
File renamed	C:\Users\Admin\Pictures\ExportBlock.raw => C:\Users\Admin\Pictures\ExportBlock.raw.bbawasted	Lsa.exe
File opened for modification	C:\Users\Admin\Pictures\ExportBlock.raw.bbawasted	Lsa.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
3440	takeown.exe
972	icacls.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3440	takeown.exe
972	icacls.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Lsa.exe	Lsa:bin
File opened for modification	C:\Windows\SysWOW64\Lsa.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
1496	vssadmin.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Lsa:bin	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	1996	vssvc.exe
Token: SeRestorePrivilege	1996	vssvc.exe
Token: SeAuditPrivilege	1996	vssvc.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 3164 wrote to memory of 1400	3164	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe	75
PID 3164 wrote to memory of 1400	3164	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe	75
PID 3164 wrote to memory of 1400	3164	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe	75
PID 1400 wrote to memory of 1496	1400	Lsa:bin	76
PID 1400 wrote to memory of 1496	1400	Lsa:bin	76
PID 1400 wrote to memory of 3440	1400	Lsa:bin	81
PID 1400 wrote to memory of 3440	1400	Lsa:bin	81
PID 1400 wrote to memory of 3440	1400	Lsa:bin	81
PID 1400 wrote to memory of 972	1400	Lsa:bin	83
PID 1400 wrote to memory of 972	1400	Lsa:bin	83
PID 1400 wrote to memory of 972	1400	Lsa:bin	83
PID 1276 wrote to memory of 3888	1276	Lsa.exe	86
PID 1276 wrote to memory of 3888	1276	Lsa.exe	86
PID 1276 wrote to memory of 3888	1276	Lsa.exe	86
PID 3888 wrote to memory of 356	3888	cmd.exe	88
PID 3888 wrote to memory of 356	3888	cmd.exe	88
PID 3888 wrote to memory of 356	3888	cmd.exe	88
PID 1400 wrote to memory of 1052	1400	Lsa:bin	89
PID 1400 wrote to memory of 1052	1400	Lsa:bin	89
PID 1400 wrote to memory of 1052	1400	Lsa:bin	89
PID 3164 wrote to memory of 1660	3164	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe	91
PID 3164 wrote to memory of 1660	3164	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe	91
PID 3164 wrote to memory of 1660	3164	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe	91
PID 1052 wrote to memory of 276	1052	cmd.exe	94
PID 1052 wrote to memory of 276	1052	cmd.exe	94
PID 1052 wrote to memory of 276	1052	cmd.exe	94
PID 1660 wrote to memory of 1784	1660	cmd.exe	93
PID 1660 wrote to memory of 1784	1660	cmd.exe	93
PID 1660 wrote to memory of 1784	1660	cmd.exe	93
PID 3888 wrote to memory of 1888	3888	cmd.exe	98
PID 3888 wrote to memory of 1888	3888	cmd.exe	98
PID 3888 wrote to memory of 1888	3888	cmd.exe	98
PID 1052 wrote to memory of 1276	1052	cmd.exe	99
PID 1052 wrote to memory of 1276	1052	cmd.exe	99
PID 1052 wrote to memory of 1276	1052	cmd.exe	99
PID 1660 wrote to memory of 1480	1660	cmd.exe	100
PID 1660 wrote to memory of 1480	1660	cmd.exe	100
PID 1660 wrote to memory of 1480	1660	cmd.exe	100

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
1888	attrib.exe
1276	attrib.exe
1480	attrib.exe

C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe
"C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe"
1⤵
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:3164
- C:\Users\Admin\AppData\Roaming\Lsa:bin
  C:\Users\Admin\AppData\Roaming\Lsa:bin -r
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:1400
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:1496
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Lsa.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:3440
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Lsa.exe /reset
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:972
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Lsa" & del "C:\Users\Admin\AppData\Roaming\Lsa"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1052
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:276
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Lsa"
      4⤵
      Views/modifies file attributes
      PID:1276
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe" & del "C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1660
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:1784
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe"
    3⤵
    - Views/modifies file attributes
    PID:1480

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1996

C:\Windows\SysWOW64\Lsa.exe
C:\Windows\SysWOW64\Lsa.exe -s
1⤵
- Executes dropped EXE
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
PID:1276
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Lsa.exe" & del "C:\Windows\SysWOW64\Lsa.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3888
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:356
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Lsa.exe"
    3⤵
    - Drops file in System32 directory
    - Views/modifies file attributes
    PID:1888

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

Replay Monitor

Loading Replay Monitor...

Downloads