wastedlocker | 887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d

Analysis

max time kernel
25s
max time network
55s
platform
windows7_x64
resource
win7v20210410
submitted
26-07-2021 12:42

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General

Target

887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe
Size

1.1MB
MD5

6b20ef8fb494cc6e455220356de298d0
SHA1

763d356d30e81d1cd15f6bc6a31f96181edb0b8f
SHA256

887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d
SHA512

ef53b73a911a608439bf929fa66a66fbf015ed274735b91c1d3b08128b14d6514d5514157e541441b9de0827d068c8f514cfd24a3a52fecb2d09764c4fb3311a

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/0x00040000000130f9-66.dat	cryptone
behavioral1/files/0x00040000000130f9-69.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
1232	Session:bin
692	Session.exe

Modifies extensions of user files 9 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File created	C:\Users\Admin\Pictures\NewFind.raw.bbawasted_info	Session.exe
File renamed	C:\Users\Admin\Pictures\RedoImport.crw => C:\Users\Admin\Pictures\RedoImport.crw.bbawasted	Session.exe
File created	C:\Users\Admin\Pictures\RenameLimit.tif.bbawasted_info	Session.exe
File renamed	C:\Users\Admin\Pictures\RenameLimit.tif => C:\Users\Admin\Pictures\RenameLimit.tif.bbawasted	Session.exe
File opened for modification	C:\Users\Admin\Pictures\RenameLimit.tif.bbawasted	Session.exe
File renamed	C:\Users\Admin\Pictures\NewFind.raw => C:\Users\Admin\Pictures\NewFind.raw.bbawasted	Session.exe
File opened for modification	C:\Users\Admin\Pictures\NewFind.raw.bbawasted	Session.exe
File created	C:\Users\Admin\Pictures\RedoImport.crw.bbawasted_info	Session.exe
File opened for modification	C:\Users\Admin\Pictures\RedoImport.crw.bbawasted	Session.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
1412	takeown.exe
268	icacls.exe

Deletes itself 1 IoCs

pid	Process
1668	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
1088	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe
1088	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1412	takeown.exe
268	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
1992	vssadmin.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Session:bin	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	1776	vssvc.exe
Token: SeRestorePrivilege	1776	vssvc.exe
Token: SeAuditPrivilege	1776	vssvc.exe

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 1088 wrote to memory of 1232	1088	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe	26
PID 1088 wrote to memory of 1232	1088	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe	26
PID 1088 wrote to memory of 1232	1088	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe	26
PID 1088 wrote to memory of 1232	1088	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe	26
PID 1232 wrote to memory of 1992	1232	Session:bin	27
PID 1232 wrote to memory of 1992	1232	Session:bin	27
PID 1232 wrote to memory of 1992	1232	Session:bin	27
PID 1232 wrote to memory of 1992	1232	Session:bin	27
PID 1232 wrote to memory of 1412	1232	Session:bin	31
PID 1232 wrote to memory of 1412	1232	Session:bin	31
PID 1232 wrote to memory of 1412	1232	Session:bin	31
PID 1232 wrote to memory of 1412	1232	Session:bin	31
PID 1232 wrote to memory of 268	1232	Session:bin	33
PID 1232 wrote to memory of 268	1232	Session:bin	33
PID 1232 wrote to memory of 268	1232	Session:bin	33
PID 1232 wrote to memory of 268	1232	Session:bin	33
PID 692 wrote to memory of 1860	692	Session.exe	40
PID 692 wrote to memory of 1860	692	Session.exe	40
PID 692 wrote to memory of 1860	692	Session.exe	40
PID 692 wrote to memory of 1860	692	Session.exe	40
PID 1860 wrote to memory of 292	1860	cmd.exe	42
PID 1860 wrote to memory of 292	1860	cmd.exe	42
PID 1860 wrote to memory of 292	1860	cmd.exe	42
PID 1860 wrote to memory of 292	1860	cmd.exe	42
PID 1232 wrote to memory of 952	1232	Session:bin	43
PID 1232 wrote to memory of 952	1232	Session:bin	43
PID 1232 wrote to memory of 952	1232	Session:bin	43
PID 1232 wrote to memory of 952	1232	Session:bin	43
PID 1088 wrote to memory of 1668	1088	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe	45
PID 1088 wrote to memory of 1668	1088	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe	45
PID 1088 wrote to memory of 1668	1088	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe	45
PID 1088 wrote to memory of 1668	1088	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe	45
PID 952 wrote to memory of 2004	952	cmd.exe	47
PID 952 wrote to memory of 2004	952	cmd.exe	47
PID 952 wrote to memory of 2004	952	cmd.exe	47
PID 952 wrote to memory of 2004	952	cmd.exe	47
PID 1668 wrote to memory of 1980	1668	cmd.exe	48
PID 1668 wrote to memory of 1980	1668	cmd.exe	48
PID 1668 wrote to memory of 1980	1668	cmd.exe	48
PID 1668 wrote to memory of 1980	1668	cmd.exe	48
PID 1860 wrote to memory of 1196	1860	cmd.exe	49
PID 1860 wrote to memory of 1196	1860	cmd.exe	49
PID 1860 wrote to memory of 1196	1860	cmd.exe	49
PID 1860 wrote to memory of 1196	1860	cmd.exe	49
PID 952 wrote to memory of 1364	952	cmd.exe	50
PID 952 wrote to memory of 1364	952	cmd.exe	50
PID 952 wrote to memory of 1364	952	cmd.exe	50
PID 952 wrote to memory of 1364	952	cmd.exe	50
PID 1668 wrote to memory of 1548	1668	cmd.exe	51
PID 1668 wrote to memory of 1548	1668	cmd.exe	51
PID 1668 wrote to memory of 1548	1668	cmd.exe	51
PID 1668 wrote to memory of 1548	1668	cmd.exe	51

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
1196	attrib.exe
1364	attrib.exe
1548	attrib.exe

C:\Users\Admin\AppData\Local\Temp\887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe
"C:\Users\Admin\AppData\Local\Temp\887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe"
1⤵
- Loads dropped DLL
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:1088
- 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:1232
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:1992
- - 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:1412
- - 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:268
- - 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:952
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:2004
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Session"
      4⤵
      Views/modifies file attributes
      PID:1364
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe" & del "C:\Users\Admin\AppData\Local\Temp\887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe"
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1668
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:1980
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.sample.exe"
    3⤵
    - Views/modifies file attributes
    PID:1548

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1776

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:692
- 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:1860
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:292
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Session.exe"
    3⤵
    - Drops file in System32 directory
    - Views/modifies file attributes
    PID:1196

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/692-75-0x0000000000400000-0x0000000000516000-memory.dmp

Filesize
1.1MB

Download
memory/1088-62-0x0000000000400000-0x0000000000516000-memory.dmp

Filesize
1.1MB

Download
memory/1088-61-0x0000000000220000-0x0000000000230000-memory.dmp

Filesize
64KB

Download
memory/1088-60-0x0000000075EF1000-0x0000000075EF3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads