wastedlocker | db665f26dbc4ca92d326f2cb98faafb9e84d404346b201cd88bec91ce4206bb2

Analysis

max time kernel
66s
max time network
25s
platform
windows7_x64
resource
win7v20201028
submitted
14/03/2021, 08:54

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General

Target

82d841869e912a772413bb37f30307b0.exe
Size

1.2MB
MD5

82d841869e912a772413bb37f30307b0
SHA1

b75ab0170c1206c345d2fb82506e816098328ee8
SHA256

db665f26dbc4ca92d326f2cb98faafb9e84d404346b201cd88bec91ce4206bb2
SHA512

48078796a9aa03e685bebd14539586c099f30c3a1e18639d4acb810dc3bbb0dc14b09066797e79c34dcd91a120b08537aadf228585e226101384ade3fe2252c6

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/0x00040000000130f1-6.dat	cryptone
behavioral1/files/0x00040000000130f1-13.dat	cryptone
behavioral1/files/0x0005000000005668-15.dat	cryptone
behavioral1/files/0x0005000000005668-17.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
2036	Nsi:bin
1180	Nsi.exe

Modifies extensions of user files 27 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File created	C:\Users\Admin\Pictures\RemoveMount.png.howto_seccrypt	Nsi.exe
File renamed	C:\Users\Admin\Pictures\RequestGet.raw => C:\Users\Admin\Pictures\RequestGet.raw.seccrypt	Nsi.exe
File opened for modification	C:\Users\Admin\Pictures\RequestGet.raw.seccrypt	Nsi.exe
File renamed	C:\Users\Admin\Pictures\ConnectUninstall.tif => C:\Users\Admin\Pictures\ConnectUninstall.tif.seccrypt	Nsi.exe
File created	C:\Users\Admin\Pictures\ReceiveRedo.tif.howto_seccrypt	Nsi.exe
File created	C:\Users\Admin\Pictures\ConnectUninstall.tif.howto_seccrypt	Nsi.exe
File opened for modification	C:\Users\Admin\Pictures\DebugTest.tiff.seccrypt	Nsi.exe
File renamed	C:\Users\Admin\Pictures\UnlockResolve.tif => C:\Users\Admin\Pictures\UnlockResolve.tif.seccrypt	Nsi.exe
File opened for modification	C:\Users\Admin\Pictures\MergeEnable.raw.seccrypt	Nsi.exe
File created	C:\Users\Admin\Pictures\StartReset.crw.howto_seccrypt	Nsi.exe
File opened for modification	C:\Users\Admin\Pictures\UnlockResolve.tif.seccrypt	Nsi.exe
File opened for modification	C:\Users\Admin\Pictures\ConnectUninstall.tif.seccrypt	Nsi.exe
File created	C:\Users\Admin\Pictures\MergeEnable.raw.howto_seccrypt	Nsi.exe
File opened for modification	C:\Users\Admin\Pictures\RemoveMount.png.seccrypt	Nsi.exe
File created	C:\Users\Admin\Pictures\UnlockResolve.tif.howto_seccrypt	Nsi.exe
File renamed	C:\Users\Admin\Pictures\HideNew.png => C:\Users\Admin\Pictures\HideNew.png.seccrypt	Nsi.exe
File renamed	C:\Users\Admin\Pictures\MergeEnable.raw => C:\Users\Admin\Pictures\MergeEnable.raw.seccrypt	Nsi.exe
File created	C:\Users\Admin\Pictures\RequestGet.raw.howto_seccrypt	Nsi.exe
File renamed	C:\Users\Admin\Pictures\RemoveMount.png => C:\Users\Admin\Pictures\RemoveMount.png.seccrypt	Nsi.exe
File renamed	C:\Users\Admin\Pictures\DebugTest.tiff => C:\Users\Admin\Pictures\DebugTest.tiff.seccrypt	Nsi.exe
File opened for modification	C:\Users\Admin\Pictures\ReceiveRedo.tif.seccrypt	Nsi.exe
File created	C:\Users\Admin\Pictures\DebugTest.tiff.howto_seccrypt	Nsi.exe
File opened for modification	C:\Users\Admin\Pictures\HideNew.png.seccrypt	Nsi.exe
File renamed	C:\Users\Admin\Pictures\ReceiveRedo.tif => C:\Users\Admin\Pictures\ReceiveRedo.tif.seccrypt	Nsi.exe
File renamed	C:\Users\Admin\Pictures\StartReset.crw => C:\Users\Admin\Pictures\StartReset.crw.seccrypt	Nsi.exe
File opened for modification	C:\Users\Admin\Pictures\StartReset.crw.seccrypt	Nsi.exe
File created	C:\Users\Admin\Pictures\HideNew.png.howto_seccrypt	Nsi.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
1748	icacls.exe
1496	takeown.exe

Deletes itself 1 IoCs

pid	Process
664	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
844	82d841869e912a772413bb37f30307b0.exe
844	82d841869e912a772413bb37f30307b0.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1496	takeown.exe
1748	icacls.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Nsi.exe	Nsi:bin
File opened for modification	C:\Windows\SysWOW64\Nsi.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
1996	vssadmin.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Nsi:bin	82d841869e912a772413bb37f30307b0.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	1732	vssvc.exe
Token: SeRestorePrivilege	1732	vssvc.exe
Token: SeAuditPrivilege	1732	vssvc.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2028	notepad.exe

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 844 wrote to memory of 2036	844	82d841869e912a772413bb37f30307b0.exe	26
PID 844 wrote to memory of 2036	844	82d841869e912a772413bb37f30307b0.exe	26
PID 844 wrote to memory of 2036	844	82d841869e912a772413bb37f30307b0.exe	26
PID 844 wrote to memory of 2036	844	82d841869e912a772413bb37f30307b0.exe	26
PID 2036 wrote to memory of 1996	2036	Nsi:bin	27
PID 2036 wrote to memory of 1996	2036	Nsi:bin	27
PID 2036 wrote to memory of 1996	2036	Nsi:bin	27
PID 2036 wrote to memory of 1996	2036	Nsi:bin	27
PID 2036 wrote to memory of 1496	2036	Nsi:bin	31
PID 2036 wrote to memory of 1496	2036	Nsi:bin	31
PID 2036 wrote to memory of 1496	2036	Nsi:bin	31
PID 2036 wrote to memory of 1496	2036	Nsi:bin	31
PID 2036 wrote to memory of 1748	2036	Nsi:bin	33
PID 2036 wrote to memory of 1748	2036	Nsi:bin	33
PID 2036 wrote to memory of 1748	2036	Nsi:bin	33
PID 2036 wrote to memory of 1748	2036	Nsi:bin	33
PID 1180 wrote to memory of 568	1180	Nsi.exe	37
PID 1180 wrote to memory of 568	1180	Nsi.exe	37
PID 1180 wrote to memory of 568	1180	Nsi.exe	37
PID 1180 wrote to memory of 568	1180	Nsi.exe	37
PID 568 wrote to memory of 1176	568	cmd.exe	39
PID 568 wrote to memory of 1176	568	cmd.exe	39
PID 568 wrote to memory of 1176	568	cmd.exe	39
PID 568 wrote to memory of 1176	568	cmd.exe	39
PID 2036 wrote to memory of 1404	2036	Nsi:bin	43
PID 2036 wrote to memory of 1404	2036	Nsi:bin	43
PID 2036 wrote to memory of 1404	2036	Nsi:bin	43
PID 2036 wrote to memory of 1404	2036	Nsi:bin	43
PID 844 wrote to memory of 664	844	82d841869e912a772413bb37f30307b0.exe	45
PID 844 wrote to memory of 664	844	82d841869e912a772413bb37f30307b0.exe	45
PID 844 wrote to memory of 664	844	82d841869e912a772413bb37f30307b0.exe	45
PID 844 wrote to memory of 664	844	82d841869e912a772413bb37f30307b0.exe	45
PID 1404 wrote to memory of 1716	1404	cmd.exe	47
PID 1404 wrote to memory of 1716	1404	cmd.exe	47
PID 1404 wrote to memory of 1716	1404	cmd.exe	47
PID 1404 wrote to memory of 1716	1404	cmd.exe	47
PID 664 wrote to memory of 1684	664	cmd.exe	48
PID 664 wrote to memory of 1684	664	cmd.exe	48
PID 664 wrote to memory of 1684	664	cmd.exe	48
PID 664 wrote to memory of 1684	664	cmd.exe	48
PID 568 wrote to memory of 1480	568	cmd.exe	50
PID 568 wrote to memory of 1480	568	cmd.exe	50
PID 568 wrote to memory of 1480	568	cmd.exe	50
PID 568 wrote to memory of 1480	568	cmd.exe	50
PID 1404 wrote to memory of 1664	1404	cmd.exe	52
PID 1404 wrote to memory of 1664	1404	cmd.exe	52
PID 1404 wrote to memory of 1664	1404	cmd.exe	52
PID 1404 wrote to memory of 1664	1404	cmd.exe	52
PID 664 wrote to memory of 900	664	cmd.exe	53
PID 664 wrote to memory of 900	664	cmd.exe	53
PID 664 wrote to memory of 900	664	cmd.exe	53
PID 664 wrote to memory of 900	664	cmd.exe	53

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
900	attrib.exe
1480	attrib.exe
1664	attrib.exe

C:\Users\Admin\AppData\Local\Temp\82d841869e912a772413bb37f30307b0.exe
"C:\Users\Admin\AppData\Local\Temp\82d841869e912a772413bb37f30307b0.exe"
1⤵
- Loads dropped DLL
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:844
- C:\Users\Admin\AppData\Roaming\Nsi:bin
  C:\Users\Admin\AppData\Roaming\Nsi:bin -r
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:2036
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:1996
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Nsi.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:1496
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Nsi.exe /reset
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:1748
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Nsi" & del "C:\Users\Admin\AppData\Roaming\Nsi"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1404
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:1716
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Nsi"
      4⤵
      Views/modifies file attributes
      PID:1664
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\82d841869e912a772413bb37f30307b0.exe" & del "C:\Users\Admin\AppData\Local\Temp\82d841869e912a772413bb37f30307b0.exe"
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:664
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:1684
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\82d841869e912a772413bb37f30307b0.exe"
    3⤵
    - Views/modifies file attributes
    PID:900

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1732

C:\Windows\SysWOW64\Nsi.exe
C:\Windows\SysWOW64\Nsi.exe -s
1⤵
- Executes dropped EXE
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
PID:1180
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Nsi.exe" & del "C:\Windows\SysWOW64\Nsi.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:568
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:1176
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Nsi.exe"
    3⤵
    - Drops file in System32 directory
    - Views/modifies file attributes
    PID:1480

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:1348

C:\Windows\system32\notepad.exe
"C:\Windows\system32\notepad.exe"
1⤵
- Suspicious use of FindShellTrayWindow
PID:2028

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/324-33-0x000007FEF6790000-0x000007FEF6A0A000-memory.dmp

Filesize
2.5MB

Download
memory/844-9-0x0000000000220000-0x0000000000230000-memory.dmp

Filesize
64KB

Download
memory/844-10-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/844-2-0x0000000076881000-0x0000000076883000-memory.dmp

Filesize
8KB

Download
memory/1348-27-0x000007FEFC2B1000-0x000007FEFC2B3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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