wastedlocker | 761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997

Analysis

max time kernel
173s
max time network
46s
platform
windows7_x64
resource
win7-20220414-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
1580	Categories:bin
1396	Categories.exe

Modifies extensions of user files 18 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\DisconnectRevoke.crw => C:\Users\Admin\Pictures\DisconnectRevoke.crw.tcwwasted	Categories.exe
File opened for modification	C:\Users\Admin\Pictures\DismountLock.png.tcwwasted	Categories.exe
File created	C:\Users\Admin\Pictures\LockTrace.tif.tcwwasted_info	Categories.exe
File renamed	C:\Users\Admin\Pictures\LockTrace.tif => C:\Users\Admin\Pictures\LockTrace.tif.tcwwasted	Categories.exe
File renamed	C:\Users\Admin\Pictures\StartWatch.png => C:\Users\Admin\Pictures\StartWatch.png.tcwwasted	Categories.exe
File opened for modification	C:\Users\Admin\Pictures\StartWatch.png.tcwwasted	Categories.exe
File renamed	C:\Users\Admin\Pictures\DismountLock.png => C:\Users\Admin\Pictures\DismountLock.png.tcwwasted	Categories.exe
File opened for modification	C:\Users\Admin\Pictures\ImportPing.crw.tcwwasted	Categories.exe
File opened for modification	C:\Users\Admin\Pictures\RenameSend.png.tcwwasted	Categories.exe
File created	C:\Users\Admin\Pictures\StartWatch.png.tcwwasted_info	Categories.exe
File created	C:\Users\Admin\Pictures\DisconnectRevoke.crw.tcwwasted_info	Categories.exe
File opened for modification	C:\Users\Admin\Pictures\DisconnectRevoke.crw.tcwwasted	Categories.exe
File created	C:\Users\Admin\Pictures\DismountLock.png.tcwwasted_info	Categories.exe
File created	C:\Users\Admin\Pictures\ImportPing.crw.tcwwasted_info	Categories.exe
File renamed	C:\Users\Admin\Pictures\ImportPing.crw => C:\Users\Admin\Pictures\ImportPing.crw.tcwwasted	Categories.exe
File opened for modification	C:\Users\Admin\Pictures\LockTrace.tif.tcwwasted	Categories.exe
File created	C:\Users\Admin\Pictures\RenameSend.png.tcwwasted_info	Categories.exe
File renamed	C:\Users\Admin\Pictures\RenameSend.png => C:\Users\Admin\Pictures\RenameSend.png.tcwwasted	Categories.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
1748	takeown.exe
684	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	Categories:bin
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Categories:bin
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Categories.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Categories.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe

Deletes itself 1 IoCs

pid	Process
1600	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
780	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe
780	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1748	takeown.exe
684	icacls.exe

Themida packer 7 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/780-56-0x0000000000400000-0x0000000000A45000-memory.dmp	themida
behavioral1/files/0x0008000000012741-63.dat	themida
behavioral1/files/0x0008000000012741-65.dat	themida
behavioral1/memory/1580-67-0x0000000000400000-0x0000000000A45000-memory.dmp	themida
behavioral1/files/0x00060000000055d7-71.dat	themida
behavioral1/files/0x00060000000055d7-73.dat	themida
behavioral1/memory/1396-76-0x0000000000400000-0x0000000000A45000-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	Categories:bin
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Categories.exe

Drops file in System32 directory 2 IoCs

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

Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs

pid	Process
780	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe
1580	Categories:bin
1396	Categories.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
1728	vssadmin.exe

NTFS ADS 1 IoCs

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

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	2000	vssvc.exe
Token: SeRestorePrivilege	2000	vssvc.exe
Token: SeAuditPrivilege	2000	vssvc.exe

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 780 wrote to memory of 1580	780	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe	28
PID 780 wrote to memory of 1580	780	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe	28
PID 780 wrote to memory of 1580	780	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe	28
PID 780 wrote to memory of 1580	780	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe	28
PID 1580 wrote to memory of 1728	1580	Categories:bin	29
PID 1580 wrote to memory of 1728	1580	Categories:bin	29
PID 1580 wrote to memory of 1728	1580	Categories:bin	29
PID 1580 wrote to memory of 1728	1580	Categories:bin	29
PID 1580 wrote to memory of 1748	1580	Categories:bin	33
PID 1580 wrote to memory of 1748	1580	Categories:bin	33
PID 1580 wrote to memory of 1748	1580	Categories:bin	33
PID 1580 wrote to memory of 1748	1580	Categories:bin	33
PID 1580 wrote to memory of 684	1580	Categories:bin	35
PID 1580 wrote to memory of 684	1580	Categories:bin	35
PID 1580 wrote to memory of 684	1580	Categories:bin	35
PID 1580 wrote to memory of 684	1580	Categories:bin	35
PID 1396 wrote to memory of 896	1396	Categories.exe	39
PID 1396 wrote to memory of 896	1396	Categories.exe	39
PID 1396 wrote to memory of 896	1396	Categories.exe	39
PID 1396 wrote to memory of 896	1396	Categories.exe	39
PID 896 wrote to memory of 908	896	cmd.exe	41
PID 896 wrote to memory of 908	896	cmd.exe	41
PID 896 wrote to memory of 908	896	cmd.exe	41
PID 896 wrote to memory of 908	896	cmd.exe	41
PID 1580 wrote to memory of 1604	1580	Categories:bin	42
PID 1580 wrote to memory of 1604	1580	Categories:bin	42
PID 1580 wrote to memory of 1604	1580	Categories:bin	42
PID 1580 wrote to memory of 1604	1580	Categories:bin	42
PID 780 wrote to memory of 1600	780	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe	44
PID 780 wrote to memory of 1600	780	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe	44
PID 780 wrote to memory of 1600	780	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe	44
PID 780 wrote to memory of 1600	780	761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe	44
PID 1604 wrote to memory of 364	1604	cmd.exe	45
PID 1604 wrote to memory of 364	1604	cmd.exe	45
PID 1604 wrote to memory of 364	1604	cmd.exe	45
PID 1604 wrote to memory of 364	1604	cmd.exe	45
PID 1600 wrote to memory of 1584	1600	cmd.exe	47
PID 1600 wrote to memory of 1584	1600	cmd.exe	47
PID 1600 wrote to memory of 1584	1600	cmd.exe	47
PID 1600 wrote to memory of 1584	1600	cmd.exe	47
PID 896 wrote to memory of 1644	896	cmd.exe	48
PID 896 wrote to memory of 1644	896	cmd.exe	48
PID 896 wrote to memory of 1644	896	cmd.exe	48
PID 896 wrote to memory of 1644	896	cmd.exe	48
PID 1604 wrote to memory of 536	1604	cmd.exe	49
PID 1604 wrote to memory of 536	1604	cmd.exe	49
PID 1604 wrote to memory of 536	1604	cmd.exe	49
PID 1604 wrote to memory of 536	1604	cmd.exe	49
PID 1600 wrote to memory of 1660	1600	cmd.exe	50
PID 1600 wrote to memory of 1660	1600	cmd.exe	50
PID 1600 wrote to memory of 1660	1600	cmd.exe	50
PID 1600 wrote to memory of 1660	1600	cmd.exe	50

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
1644	attrib.exe
536	attrib.exe
1660	attrib.exe

C:\Users\Admin\AppData\Local\Temp\761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe
"C:\Users\Admin\AppData\Local\Temp\761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe"
1⤵
- Checks BIOS information in registry
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:780
- C:\Users\Admin\AppData\Roaming\Categories:bin
  C:\Users\Admin\AppData\Roaming\Categories: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:1580
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:1728
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Categories.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:1748
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Categories.exe /reset
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:684
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Categories" & del "C:\Users\Admin\AppData\Roaming\Categories"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1604
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:364
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Categories"
      4⤵
      Views/modifies file attributes
      PID:536
- 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⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1600
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:1584
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997.exe"
    3⤵
    - Views/modifies file attributes
    PID:1660

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2000

C:\Windows\SysWOW64\Categories.exe
C:\Windows\SysWOW64\Categories.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:1396
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Categories.exe" & del "C:\Windows\SysWOW64\Categories.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:896
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:908
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Categories.exe"
    3⤵
    - Drops file in System32 directory
    - Views/modifies file attributes
    PID:1644

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\Categories:bin

Filesize
2.6MB

MD5
678c88c9fa4bd905d617530e3ed3f092

SHA1
f2019598e111d8833fb0a7b663e5035a3db47eac

SHA256
761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997

SHA512
aa1b26d398f273a838d6623701ba84314cc691c4bbbc51703af34ad3d5f503a66dc42fb5838e66f4e84004aaf23e29caf6113a8b17891179b62fd3d7773cde5d

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

Filesize
2.6MB

MD5
678c88c9fa4bd905d617530e3ed3f092

SHA1
f2019598e111d8833fb0a7b663e5035a3db47eac

SHA256
761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997

SHA512
aa1b26d398f273a838d6623701ba84314cc691c4bbbc51703af34ad3d5f503a66dc42fb5838e66f4e84004aaf23e29caf6113a8b17891179b62fd3d7773cde5d

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

Filesize
2.6MB

MD5
678c88c9fa4bd905d617530e3ed3f092

SHA1
f2019598e111d8833fb0a7b663e5035a3db47eac

SHA256
761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997

SHA512
aa1b26d398f273a838d6623701ba84314cc691c4bbbc51703af34ad3d5f503a66dc42fb5838e66f4e84004aaf23e29caf6113a8b17891179b62fd3d7773cde5d

Download Submit
\??\c:\Users\Admin\AppData\Roaming\categories:bin

Filesize
2.6MB

MD5
678c88c9fa4bd905d617530e3ed3f092

SHA1
f2019598e111d8833fb0a7b663e5035a3db47eac

SHA256
761fe7fde9899b8482bcd2a1800c442201cc866fb8e0e28969474d51fb412997

SHA512
aa1b26d398f273a838d6623701ba84314cc691c4bbbc51703af34ad3d5f503a66dc42fb5838e66f4e84004aaf23e29caf6113a8b17891179b62fd3d7773cde5d

Download Submit
\Users\Admin\AppData\Roaming\Categories

Filesize
50KB

MD5
7961aad46149cd5510dd405fa5de1d3f

SHA1
49da887be2c41821db5634672b29171ead4ed815

SHA256
6d7929a62323ca5fa93991bd54e37503f94a80adee49ce8347ce626bbea2a6c4

SHA512
6bbdd82684092ed9b986d5c49fe5631a564dec46adbb8e3c61ad5e61e43f3783b76f2e2ecb09f24f6848c8169fff3a0c781d983f368bf740d1cb1f5a796deedd

Download Submit
\Users\Admin\AppData\Roaming\Categories

Filesize
50KB

MD5
7961aad46149cd5510dd405fa5de1d3f

SHA1
49da887be2c41821db5634672b29171ead4ed815

SHA256
6d7929a62323ca5fa93991bd54e37503f94a80adee49ce8347ce626bbea2a6c4

SHA512
6bbdd82684092ed9b986d5c49fe5631a564dec46adbb8e3c61ad5e61e43f3783b76f2e2ecb09f24f6848c8169fff3a0c781d983f368bf740d1cb1f5a796deedd

Download Submit
memory/780-59-0x0000000000400000-0x0000000000A45000-memory.dmp

Filesize
6.3MB

Download
memory/780-58-0x00000000003E0000-0x00000000003F2000-memory.dmp

Filesize
72KB

Download
memory/780-57-0x0000000077910000-0x0000000077A90000-memory.dmp

Filesize
1.5MB

Download
memory/780-56-0x0000000000400000-0x0000000000A45000-memory.dmp

Filesize
6.3MB

Download
memory/780-54-0x0000000076531000-0x0000000076533000-memory.dmp

Filesize
8KB

Download
memory/780-55-0x0000000000401000-0x0000000000403000-memory.dmp

Filesize
8KB

Download
memory/1396-77-0x0000000077910000-0x0000000077A90000-memory.dmp

Filesize
1.5MB

Download
memory/1396-76-0x0000000000400000-0x0000000000A45000-memory.dmp

Filesize
6.3MB

Download
memory/1396-78-0x0000000000400000-0x0000000000A45000-memory.dmp

Filesize
6.3MB

Download
memory/1580-69-0x0000000000400000-0x0000000000A45000-memory.dmp

Filesize
6.3MB

Download
memory/1580-67-0x0000000000400000-0x0000000000A45000-memory.dmp

Filesize
6.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads