wastedlocker | 761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997

Analysis

max time kernel
104s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
03/05/2022, 15:11

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General

Target

761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe
Size

2.6MB
MD5

678c88c9fa4bd905d617530e3ed3f092
SHA1

f2019598e111d8833fb0a7b663e5035a3db47eac
SHA256

761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997
SHA512

aa1b26d398f273a838d6623701ba84314cc691c4bbbc51703af34ad3d5f503a66dc42fb5838e66f4e84004aaf23e29caf6113a8b17891179b62fd3d7773cde5d

Score

10^/10

wastedlocker discovery evasion exploit ransomware themida trojan

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
Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Executes dropped EXE 2 IoCs

pid	Process
220	Join:bin
664	Join.exe

Modifies extensions of user files 21 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File opened for modification	C:\Users\Admin\Pictures\EditMerge.raw.tcwwasted	Join.exe
File opened for modification	C:\Users\Admin\Pictures\ImportFormat.crw.tcwwasted	Join.exe
File opened for modification	C:\Users\Admin\Pictures\StartMount.tiff.tcwwasted	Join.exe
File renamed	C:\Users\Admin\Pictures\ConnectFind.raw => C:\Users\Admin\Pictures\ConnectFind.raw.tcwwasted	Join.exe
File opened for modification	C:\Users\Admin\Pictures\ConnectFind.raw.tcwwasted	Join.exe
File opened for modification	C:\Users\Admin\Pictures\CopyRequest.tiff.tcwwasted	Join.exe
File created	C:\Users\Admin\Pictures\EditMerge.raw.tcwwasted_info	Join.exe
File opened for modification	C:\Users\Admin\Pictures\LimitClose.png.tcwwasted	Join.exe
File created	C:\Users\Admin\Pictures\StepWatch.tiff.tcwwasted_info	Join.exe
File renamed	C:\Users\Admin\Pictures\StepWatch.tiff => C:\Users\Admin\Pictures\StepWatch.tiff.tcwwasted	Join.exe
File created	C:\Users\Admin\Pictures\ConnectFind.raw.tcwwasted_info	Join.exe
File renamed	C:\Users\Admin\Pictures\CopyRequest.tiff => C:\Users\Admin\Pictures\CopyRequest.tiff.tcwwasted	Join.exe
File created	C:\Users\Admin\Pictures\LimitClose.png.tcwwasted_info	Join.exe
File created	C:\Users\Admin\Pictures\CopyRequest.tiff.tcwwasted_info	Join.exe
File created	C:\Users\Admin\Pictures\ImportFormat.crw.tcwwasted_info	Join.exe
File renamed	C:\Users\Admin\Pictures\ImportFormat.crw => C:\Users\Admin\Pictures\ImportFormat.crw.tcwwasted	Join.exe
File renamed	C:\Users\Admin\Pictures\LimitClose.png => C:\Users\Admin\Pictures\LimitClose.png.tcwwasted	Join.exe
File created	C:\Users\Admin\Pictures\StartMount.tiff.tcwwasted_info	Join.exe
File renamed	C:\Users\Admin\Pictures\StartMount.tiff => C:\Users\Admin\Pictures\StartMount.tiff.tcwwasted	Join.exe
File opened for modification	C:\Users\Admin\Pictures\StepWatch.tiff.tcwwasted	Join.exe
File renamed	C:\Users\Admin\Pictures\EditMerge.raw => C:\Users\Admin\Pictures\EditMerge.raw.tcwwasted	Join.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
4792	takeown.exe
3544	icacls.exe

Checks BIOS information in registry 2 TTPs 6 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Join:bin
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Join:bin
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Join.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Join.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4792	takeown.exe
3544	icacls.exe

Themida packer 7 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/4400-132-0x0000000000400000-0x0000000000A45000-memory.dmp	themida
behavioral2/files/0x0007000000022e4e-137.dat	themida
behavioral2/files/0x0007000000022e4e-138.dat	themida
behavioral2/memory/220-140-0x0000000000400000-0x0000000000A45000-memory.dmp	themida
behavioral2/files/0x000300000001e526-145.dat	themida
behavioral2/files/0x000300000001e526-147.dat	themida
behavioral2/memory/664-149-0x0000000000400000-0x0000000000A45000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 3 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Join:bin
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Join.exe

Drops file in System32 directory 2 IoCs

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

Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs

pid	Process
4400	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe
220	Join:bin
664	Join.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
860	vssadmin.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Join:bin	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	4320	vssvc.exe
Token: SeRestorePrivilege	4320	vssvc.exe
Token: SeAuditPrivilege	4320	vssvc.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 4400 wrote to memory of 220	4400	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe	83
PID 4400 wrote to memory of 220	4400	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe	83
PID 4400 wrote to memory of 220	4400	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe	83
PID 220 wrote to memory of 860	220	Join:bin	90
PID 220 wrote to memory of 860	220	Join:bin	90
PID 220 wrote to memory of 4792	220	Join:bin	97
PID 220 wrote to memory of 4792	220	Join:bin	97
PID 220 wrote to memory of 4792	220	Join:bin	97
PID 220 wrote to memory of 3544	220	Join:bin	100
PID 220 wrote to memory of 3544	220	Join:bin	100
PID 220 wrote to memory of 3544	220	Join:bin	100
PID 220 wrote to memory of 1256	220	Join:bin	110
PID 664 wrote to memory of 4700	664	Join.exe	111
PID 220 wrote to memory of 1256	220	Join:bin	110
PID 220 wrote to memory of 1256	220	Join:bin	110
PID 664 wrote to memory of 4700	664	Join.exe	111
PID 664 wrote to memory of 4700	664	Join.exe	111
PID 4700 wrote to memory of 1960	4700	cmd.exe	114
PID 4700 wrote to memory of 1960	4700	cmd.exe	114
PID 4700 wrote to memory of 1960	4700	cmd.exe	114
PID 1256 wrote to memory of 620	1256	cmd.exe	115
PID 1256 wrote to memory of 620	1256	cmd.exe	115
PID 1256 wrote to memory of 620	1256	cmd.exe	115
PID 4400 wrote to memory of 1060	4400	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe	116
PID 4400 wrote to memory of 1060	4400	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe	116
PID 4400 wrote to memory of 1060	4400	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe	116
PID 1060 wrote to memory of 4316	1060	cmd.exe	118
PID 1060 wrote to memory of 4316	1060	cmd.exe	118
PID 1060 wrote to memory of 4316	1060	cmd.exe	118
PID 1256 wrote to memory of 1260	1256	cmd.exe	120
PID 1256 wrote to memory of 1260	1256	cmd.exe	120
PID 1256 wrote to memory of 1260	1256	cmd.exe	120
PID 4700 wrote to memory of 2204	4700	cmd.exe	119
PID 4700 wrote to memory of 2204	4700	cmd.exe	119
PID 4700 wrote to memory of 2204	4700	cmd.exe	119
PID 1060 wrote to memory of 3240	1060	cmd.exe	121
PID 1060 wrote to memory of 3240	1060	cmd.exe	121
PID 1060 wrote to memory of 3240	1060	cmd.exe	121

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
2204	attrib.exe
1260	attrib.exe
3240	attrib.exe

C:\Users\Admin\AppData\Local\Temp\761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe
"C:\Users\Admin\AppData\Local\Temp\761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe"
1⤵
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:4400
- C:\Users\Admin\AppData\Roaming\Join:bin
  C:\Users\Admin\AppData\Roaming\Join:bin -r
  2⤵
  - Executes dropped EXE
  - Checks BIOS information in registry
  - Checks whether UAC is enabled
  - Drops file in System32 directory
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of WriteProcessMemory
  PID:220
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:860
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Join.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:4792
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Join.exe /reset
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:3544
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Join" & del "C:\Users\Admin\AppData\Roaming\Join"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1256
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:620
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Join"
      4⤵
      Views/modifies file attributes
      PID:1260
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe" & del "C:\Users\Admin\AppData\Local\Temp\761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1060
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:4316
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe"
    3⤵
    - Views/modifies file attributes
    PID:3240

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4320

C:\Windows\SysWOW64\Join.exe
C:\Windows\SysWOW64\Join.exe -s
1⤵
- Executes dropped EXE
- Modifies extensions of user files
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:664
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Join.exe" & del "C:\Windows\SysWOW64\Join.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4700
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:1960
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Join.exe"
    3⤵
    - Drops file in System32 directory
    - Views/modifies file attributes
    PID:2204

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

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

T1490

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Downloads

C:\Users\Admin\AppData\Roaming\Join:bin

Filesize
2.6MB

MD5
678c88c9fa4bd905d617530e3ed3f092

SHA1
f2019598e111d8833fb0a7b663e5035a3db47eac

SHA256
761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997

SHA512
aa1b26d398f273a838d6623701ba84314cc691c4bbbc51703af34ad3d5f503a66dc42fb5838e66f4e84004aaf23e29caf6113a8b17891179b62fd3d7773cde5d

Download Submit
C:\Users\Admin\AppData\Roaming\Join:bin

Filesize
2.6MB

MD5
678c88c9fa4bd905d617530e3ed3f092

SHA1
f2019598e111d8833fb0a7b663e5035a3db47eac

SHA256
761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997

SHA512
aa1b26d398f273a838d6623701ba84314cc691c4bbbc51703af34ad3d5f503a66dc42fb5838e66f4e84004aaf23e29caf6113a8b17891179b62fd3d7773cde5d

Download Submit
C:\Windows\SysWOW64\Join.exe

Filesize
2.6MB

MD5
678c88c9fa4bd905d617530e3ed3f092

SHA1
f2019598e111d8833fb0a7b663e5035a3db47eac

SHA256
761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997

SHA512
aa1b26d398f273a838d6623701ba84314cc691c4bbbc51703af34ad3d5f503a66dc42fb5838e66f4e84004aaf23e29caf6113a8b17891179b62fd3d7773cde5d

Download Submit
C:\Windows\SysWOW64\Join.exe

Filesize
2.6MB

MD5
678c88c9fa4bd905d617530e3ed3f092

SHA1
f2019598e111d8833fb0a7b663e5035a3db47eac

SHA256
761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997

SHA512
aa1b26d398f273a838d6623701ba84314cc691c4bbbc51703af34ad3d5f503a66dc42fb5838e66f4e84004aaf23e29caf6113a8b17891179b62fd3d7773cde5d

Download Submit
memory/220-140-0x0000000000400000-0x0000000000A45000-memory.dmp

Filesize
6.3MB

Download
memory/220-143-0x0000000000400000-0x0000000000A45000-memory.dmp

Filesize
6.3MB

Download
memory/220-141-0x0000000076FD0000-0x0000000077173000-memory.dmp

Filesize
1.6MB

Download
memory/664-149-0x0000000000400000-0x0000000000A45000-memory.dmp

Filesize
6.3MB

Download
memory/664-150-0x0000000076FD0000-0x0000000077173000-memory.dmp

Filesize
1.6MB

Download
memory/664-151-0x0000000000400000-0x0000000000A45000-memory.dmp

Filesize
6.3MB

Download
memory/4400-133-0x0000000076FD0000-0x0000000077173000-memory.dmp

Filesize
1.6MB

Download
memory/4400-131-0x0000000000401000-0x0000000000403000-memory.dmp

Filesize
8KB

Download
memory/4400-132-0x0000000000400000-0x0000000000A45000-memory.dmp

Filesize
6.3MB

Download
memory/4400-135-0x0000000000400000-0x0000000000A45000-memory.dmp

Filesize
6.3MB

Download
memory/4400-134-0x0000000002F10000-0x0000000002F22000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads