wastedlocker | 5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367

Analysis

max time kernel
22s
max time network
69s
platform
windows7_x64
resource
win7v20210410
submitted
26-07-2021 12:42

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General

Target

5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.sample.exe
Size

1.0MB
MD5

572fea5f025df78f2d316216fbeee52e
SHA1

91b2bf44b1f9282c09f07f16631deaa3ad9d956d
SHA256

5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367
SHA512

eb238272227c5825477ff1e37dc4f7e467665049d4db5649fff59c39d7745e88b06234d6d1218c05c802e33e21577f9d4a533cb9e23ebe6fb09654f97759c187

Score

10^/10

wastedlocker cryptone discovery exploit packer ransomware

Malware Config

Signatures

WastedLocker
Ransomware family seen in the wild since May 2020.
ransomware wastedlocker

CryptOne packer 4 IoCs

Detects CryptOne packer defined in NCC blogpost.

cryptone packer

resource	yara_rule
behavioral1/files/0x00040000000130e0-64.dat	cryptone
behavioral1/files/0x00040000000130e0-69.dat	cryptone
behavioral1/files/0x0005000000005668-71.dat	cryptone
behavioral1/files/0x0005000000005668-73.dat	cryptone

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
1212	Session:bin
1208	Session.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\GrantUndo.raw.rlhwasted	Session.exe
File renamed	C:\Users\Admin\Pictures\InvokeSearch.tiff => C:\Users\Admin\Pictures\InvokeSearch.tiff.rlhwasted	Session.exe
File opened for modification	C:\Users\Admin\Pictures\InvokeSearch.tiff.rlhwasted	Session.exe
File renamed	C:\Users\Admin\Pictures\RedoTrace.png => C:\Users\Admin\Pictures\RedoTrace.png.rlhwasted	Session.exe
File opened for modification	C:\Users\Admin\Pictures\RedoTrace.png.rlhwasted	Session.exe
File renamed	C:\Users\Admin\Pictures\BackupAdd.tiff => C:\Users\Admin\Pictures\BackupAdd.tiff.rlhwasted	Session.exe
File opened for modification	C:\Users\Admin\Pictures\BackupAdd.tiff.rlhwasted	Session.exe
File renamed	C:\Users\Admin\Pictures\DebugTrace.png => C:\Users\Admin\Pictures\DebugTrace.png.rlhwasted	Session.exe
File created	C:\Users\Admin\Pictures\InvokeSearch.tiff.rlhwasted_info	Session.exe
File renamed	C:\Users\Admin\Pictures\AssertOptimize.png => C:\Users\Admin\Pictures\AssertOptimize.png.rlhwasted	Session.exe
File opened for modification	C:\Users\Admin\Pictures\AssertOptimize.png.rlhwasted	Session.exe
File created	C:\Users\Admin\Pictures\DebugTrace.png.rlhwasted_info	Session.exe
File renamed	C:\Users\Admin\Pictures\RestartDisable.tif => C:\Users\Admin\Pictures\RestartDisable.tif.rlhwasted	Session.exe
File created	C:\Users\Admin\Pictures\GrantUndo.raw.rlhwasted_info	Session.exe
File renamed	C:\Users\Admin\Pictures\GrantUndo.raw => C:\Users\Admin\Pictures\GrantUndo.raw.rlhwasted	Session.exe
File created	C:\Users\Admin\Pictures\RestartDisable.tif.rlhwasted_info	Session.exe
File created	C:\Users\Admin\Pictures\RedoTrace.png.rlhwasted_info	Session.exe
File opened for modification	C:\Users\Admin\Pictures\RestartDisable.tif.rlhwasted	Session.exe
File created	C:\Users\Admin\Pictures\AssertOptimize.png.rlhwasted_info	Session.exe
File created	C:\Users\Admin\Pictures\BackupAdd.tiff.rlhwasted_info	Session.exe
File opened for modification	C:\Users\Admin\Pictures\DebugTrace.png.rlhwasted	Session.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
1644	takeown.exe
672	icacls.exe

Deletes itself 1 IoCs

pid	Process
972	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
1672	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.sample.exe
1672	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.sample.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1644	takeown.exe
672	icacls.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Session.exe	Session:bin
File opened for modification	C:\Windows\SysWOW64\Session.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
1928	vssadmin.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Session:bin	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.sample.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	1788	vssvc.exe
Token: SeRestorePrivilege	1788	vssvc.exe
Token: SeAuditPrivilege	1788	vssvc.exe

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 1672 wrote to memory of 1212	1672	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.sample.exe	26
PID 1672 wrote to memory of 1212	1672	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.sample.exe	26
PID 1672 wrote to memory of 1212	1672	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.sample.exe	26
PID 1672 wrote to memory of 1212	1672	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.sample.exe	26
PID 1212 wrote to memory of 1928	1212	Session:bin	27
PID 1212 wrote to memory of 1928	1212	Session:bin	27
PID 1212 wrote to memory of 1928	1212	Session:bin	27
PID 1212 wrote to memory of 1928	1212	Session:bin	27
PID 1212 wrote to memory of 1644	1212	Session:bin	31
PID 1212 wrote to memory of 1644	1212	Session:bin	31
PID 1212 wrote to memory of 1644	1212	Session:bin	31
PID 1212 wrote to memory of 1644	1212	Session:bin	31
PID 1212 wrote to memory of 672	1212	Session:bin	33
PID 1212 wrote to memory of 672	1212	Session:bin	33
PID 1212 wrote to memory of 672	1212	Session:bin	33
PID 1212 wrote to memory of 672	1212	Session:bin	33
PID 1208 wrote to memory of 748	1208	Session.exe	37
PID 1208 wrote to memory of 748	1208	Session.exe	37
PID 1208 wrote to memory of 748	1208	Session.exe	37
PID 1208 wrote to memory of 748	1208	Session.exe	37
PID 1212 wrote to memory of 1816	1212	Session:bin	38
PID 1212 wrote to memory of 1816	1212	Session:bin	38
PID 1212 wrote to memory of 1816	1212	Session:bin	38
PID 1212 wrote to memory of 1816	1212	Session:bin	38
PID 1672 wrote to memory of 972	1672	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.sample.exe	41
PID 1672 wrote to memory of 972	1672	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.sample.exe	41
PID 1672 wrote to memory of 972	1672	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.sample.exe	41
PID 1672 wrote to memory of 972	1672	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.sample.exe	41
PID 1816 wrote to memory of 1692	1816	cmd.exe	42
PID 1816 wrote to memory of 1692	1816	cmd.exe	42
PID 1816 wrote to memory of 1692	1816	cmd.exe	42
PID 1816 wrote to memory of 1692	1816	cmd.exe	42
PID 748 wrote to memory of 896	748	cmd.exe	44
PID 748 wrote to memory of 896	748	cmd.exe	44
PID 748 wrote to memory of 896	748	cmd.exe	44
PID 748 wrote to memory of 896	748	cmd.exe	44
PID 972 wrote to memory of 928	972	cmd.exe	45
PID 972 wrote to memory of 928	972	cmd.exe	45
PID 972 wrote to memory of 928	972	cmd.exe	45
PID 972 wrote to memory of 928	972	cmd.exe	45
PID 1816 wrote to memory of 1536	1816	cmd.exe	50
PID 1816 wrote to memory of 1536	1816	cmd.exe	50
PID 1816 wrote to memory of 1536	1816	cmd.exe	50
PID 1816 wrote to memory of 1536	1816	cmd.exe	50
PID 748 wrote to memory of 1620	748	cmd.exe	49
PID 748 wrote to memory of 1620	748	cmd.exe	49
PID 748 wrote to memory of 1620	748	cmd.exe	49
PID 748 wrote to memory of 1620	748	cmd.exe	49
PID 972 wrote to memory of 1724	972	cmd.exe	51
PID 972 wrote to memory of 1724	972	cmd.exe	51
PID 972 wrote to memory of 1724	972	cmd.exe	51
PID 972 wrote to memory of 1724	972	cmd.exe	51

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
1620	attrib.exe
1536	attrib.exe
1724	attrib.exe

C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.sample.exe
"C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.sample.exe"
1⤵
- Loads dropped DLL
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:1672
- C:\Users\Admin\AppData\Roaming\Session:bin
  C:\Users\Admin\AppData\Roaming\Session:bin -r
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:1212
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:1928
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Session.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:1644
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Session.exe /reset
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:672
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Session" & del "C:\Users\Admin\AppData\Roaming\Session"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1816
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:1692
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Session"
      4⤵
      Views/modifies file attributes
      PID:1536
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.sample.exe" & del "C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.sample.exe"
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:972
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:928
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.sample.exe"
    3⤵
    - Views/modifies file attributes
    PID:1724

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1788

C:\Windows\SysWOW64\Session.exe
C:\Windows\SysWOW64\Session.exe -s
1⤵
- Executes dropped EXE
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
PID:1208
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Session.exe" & del "C:\Windows\SysWOW64\Session.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:748
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:896
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Session.exe"
    3⤵
    - Drops file in System32 directory
    - Views/modifies file attributes
    PID:1620

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/1208-75-0x0000000000400000-0x0000000000507000-memory.dmp

Filesize
1.0MB

Download
memory/1672-67-0x0000000000220000-0x0000000000230000-memory.dmp

Filesize
64KB

Download
memory/1672-68-0x0000000000400000-0x0000000000507000-memory.dmp

Filesize
1.0MB

Download
memory/1672-60-0x00000000767B1000-0x00000000767B3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads