wastedlocker | bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8

Analysis

max time kernel
20s
max time network
57s
platform
windows7_x64
resource
win7v20210410
submitted
26-07-2021 13:00

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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
1196	Image:bin
1704	Image.exe

Modifies extensions of user files 3 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File created	C:\Users\Admin\Pictures\SelectCheckpoint.crw.bbawasted_info	Image.exe
File renamed	C:\Users\Admin\Pictures\SelectCheckpoint.crw => C:\Users\Admin\Pictures\SelectCheckpoint.crw.bbawasted	Image.exe
File opened for modification	C:\Users\Admin\Pictures\SelectCheckpoint.crw.bbawasted	Image.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
316	takeown.exe
1612	icacls.exe

Deletes itself 1 IoCs

pid	Process
752	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
1672	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe
1672	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
316	takeown.exe
1612	icacls.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Image.exe	Image:bin
File opened for modification	C:\Windows\SysWOW64\Image.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
1972	vssadmin.exe

NTFS ADS 1 IoCs

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

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	1332	vssvc.exe
Token: SeRestorePrivilege	1332	vssvc.exe
Token: SeAuditPrivilege	1332	vssvc.exe

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 1672 wrote to memory of 1196	1672	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe	26
PID 1672 wrote to memory of 1196	1672	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe	26
PID 1672 wrote to memory of 1196	1672	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe	26
PID 1672 wrote to memory of 1196	1672	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe	26
PID 1196 wrote to memory of 1972	1196	Image:bin	27
PID 1196 wrote to memory of 1972	1196	Image:bin	27
PID 1196 wrote to memory of 1972	1196	Image:bin	27
PID 1196 wrote to memory of 1972	1196	Image:bin	27
PID 1196 wrote to memory of 316	1196	Image:bin	31
PID 1196 wrote to memory of 316	1196	Image:bin	31
PID 1196 wrote to memory of 316	1196	Image:bin	31
PID 1196 wrote to memory of 316	1196	Image:bin	31
PID 1196 wrote to memory of 1612	1196	Image:bin	33
PID 1196 wrote to memory of 1612	1196	Image:bin	33
PID 1196 wrote to memory of 1612	1196	Image:bin	33
PID 1196 wrote to memory of 1612	1196	Image:bin	33
PID 1704 wrote to memory of 560	1704	Image.exe	37
PID 1704 wrote to memory of 560	1704	Image.exe	37
PID 1704 wrote to memory of 560	1704	Image.exe	37
PID 1704 wrote to memory of 560	1704	Image.exe	37
PID 560 wrote to memory of 1836	560	cmd.exe	39
PID 560 wrote to memory of 1836	560	cmd.exe	39
PID 560 wrote to memory of 1836	560	cmd.exe	39
PID 560 wrote to memory of 1836	560	cmd.exe	39
PID 1196 wrote to memory of 748	1196	Image:bin	40
PID 1196 wrote to memory of 748	1196	Image:bin	40
PID 1196 wrote to memory of 748	1196	Image:bin	40
PID 1196 wrote to memory of 748	1196	Image:bin	40
PID 1672 wrote to memory of 752	1672	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe	42
PID 1672 wrote to memory of 752	1672	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe	42
PID 1672 wrote to memory of 752	1672	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe	42
PID 1672 wrote to memory of 752	1672	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe	42
PID 748 wrote to memory of 744	748	cmd.exe	44
PID 748 wrote to memory of 744	748	cmd.exe	44
PID 748 wrote to memory of 744	748	cmd.exe	44
PID 748 wrote to memory of 744	748	cmd.exe	44
PID 752 wrote to memory of 1164	752	cmd.exe	45
PID 752 wrote to memory of 1164	752	cmd.exe	45
PID 752 wrote to memory of 1164	752	cmd.exe	45
PID 752 wrote to memory of 1164	752	cmd.exe	45
PID 560 wrote to memory of 1060	560	cmd.exe	49
PID 560 wrote to memory of 1060	560	cmd.exe	49
PID 560 wrote to memory of 1060	560	cmd.exe	49
PID 560 wrote to memory of 1060	560	cmd.exe	49
PID 752 wrote to memory of 1380	752	cmd.exe	51
PID 752 wrote to memory of 1380	752	cmd.exe	51
PID 752 wrote to memory of 1380	752	cmd.exe	51
PID 752 wrote to memory of 1380	752	cmd.exe	51
PID 748 wrote to memory of 1320	748	cmd.exe	50
PID 748 wrote to memory of 1320	748	cmd.exe	50
PID 748 wrote to memory of 1320	748	cmd.exe	50
PID 748 wrote to memory of 1320	748	cmd.exe	50

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
1060	attrib.exe
1320	attrib.exe
1380	attrib.exe

C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe
"C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe"
1⤵
- Loads dropped DLL
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:1672
- C:\Users\Admin\AppData\Roaming\Image:bin
  C:\Users\Admin\AppData\Roaming\Image:bin -r
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:1196
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:1972
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Image.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:316
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Image.exe /reset
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:1612
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Image" & del "C:\Users\Admin\AppData\Roaming\Image"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:748
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:744
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Image"
      4⤵
      Views/modifies file attributes
      PID:1320
- 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⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:752
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:1164
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.sample.exe"
    3⤵
    - Views/modifies file attributes
    PID:1380

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1332

C:\Windows\SysWOW64\Image.exe
C:\Windows\SysWOW64\Image.exe -s
1⤵
- Executes dropped EXE
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
PID:1704
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Image.exe" & del "C:\Windows\SysWOW64\Image.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:560
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:1836
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Image.exe"
    3⤵
    - Drops file in System32 directory
    - Views/modifies file attributes
    PID:1060

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

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Downloads

memory/1672-59-0x00000000768B1000-0x00000000768B3000-memory.dmp

Filesize
8KB

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads