wastedlocker | 6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e

Analysis

max time kernel
27s
max time network
15s
platform
windows7_x64
resource
win7v20201028
submitted
03/11/2020, 14:20

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General

Target

6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e.bin.exe
Size

60KB
MD5

9b5f5e7d14bd7d73b5adda12d4015ef4
SHA1

a41daf00a0193a8d8583801f8cb20405d9678296
SHA256

6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e
SHA512

83042c7a33d27edd86e1d9303fb587c1456017d2a87ab82bba80a9360569432197ecc599b2b810d0f71c91d6f3116e390ea6244fc0630a972a50da8f825e18de

Score

10^/10

wastedlocker discovery exploit persistence ransomware

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

Executes dropped EXE 2 IoCs

pid	Process
1796	Co:bin
760	Co.exe

Modifies extensions of user files 9 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\SetStep.crw => C:\Users\Admin\Pictures\SetStep.crw.garminwasted	Co.exe
File opened for modification	C:\Users\Admin\Pictures\SetStep.crw.garminwasted	Co.exe
File renamed	C:\Users\Admin\Pictures\ImportUnregister.tif => C:\Users\Admin\Pictures\ImportUnregister.tif.garminwasted	Co.exe
File opened for modification	C:\Users\Admin\Pictures\ImportUnregister.tif.garminwasted	Co.exe
File created	C:\Users\Admin\Pictures\MergeApprove.tif.garminwasted_info	Co.exe
File renamed	C:\Users\Admin\Pictures\MergeApprove.tif => C:\Users\Admin\Pictures\MergeApprove.tif.garminwasted	Co.exe
File opened for modification	C:\Users\Admin\Pictures\MergeApprove.tif.garminwasted	Co.exe
File created	C:\Users\Admin\Pictures\SetStep.crw.garminwasted_info	Co.exe
File created	C:\Users\Admin\Pictures\ImportUnregister.tif.garminwasted_info	Co.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
784	takeown.exe
840	icacls.exe

Deletes itself 1 IoCs

pid	Process
1600	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
740	6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e.bin.exe
740	6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e.bin.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
840	icacls.exe
784	takeown.exe

Drops file in System32 directory 2 IoCs

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

Modifies service 2 TTPs 5 IoCs

persistence

Modify Registry

T1112

Modify Existing Service

T1031

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Registry Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\COM+ REGDB Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\ASR Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Shadow Copy Optimization Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\SwProvider_{b5946137-7b9f-4925-af80-51abd60b20d5}	vssvc.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
1976	vssadmin.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Co:bin	6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e.bin.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	2040	vssvc.exe
Token: SeRestorePrivilege	2040	vssvc.exe
Token: SeAuditPrivilege	2040	vssvc.exe

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 740 wrote to memory of 1796	740	6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e.bin.exe	25
PID 740 wrote to memory of 1796	740	6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e.bin.exe	25
PID 740 wrote to memory of 1796	740	6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e.bin.exe	25
PID 740 wrote to memory of 1796	740	6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e.bin.exe	25
PID 1796 wrote to memory of 1976	1796	Co:bin	26
PID 1796 wrote to memory of 1976	1796	Co:bin	26
PID 1796 wrote to memory of 1976	1796	Co:bin	26
PID 1796 wrote to memory of 1976	1796	Co:bin	26
PID 1796 wrote to memory of 784	1796	Co:bin	34
PID 1796 wrote to memory of 784	1796	Co:bin	34
PID 1796 wrote to memory of 784	1796	Co:bin	34
PID 1796 wrote to memory of 784	1796	Co:bin	34
PID 1796 wrote to memory of 840	1796	Co:bin	36
PID 1796 wrote to memory of 840	1796	Co:bin	36
PID 1796 wrote to memory of 840	1796	Co:bin	36
PID 1796 wrote to memory of 840	1796	Co:bin	36
PID 760 wrote to memory of 1304	760	Co.exe	40
PID 760 wrote to memory of 1304	760	Co.exe	40
PID 760 wrote to memory of 1304	760	Co.exe	40
PID 760 wrote to memory of 1304	760	Co.exe	40
PID 1304 wrote to memory of 1000	1304	cmd.exe	42
PID 1304 wrote to memory of 1000	1304	cmd.exe	42
PID 1304 wrote to memory of 1000	1304	cmd.exe	42
PID 1304 wrote to memory of 1000	1304	cmd.exe	42
PID 1796 wrote to memory of 1324	1796	Co:bin	43
PID 1796 wrote to memory of 1324	1796	Co:bin	43
PID 1796 wrote to memory of 1324	1796	Co:bin	43
PID 1796 wrote to memory of 1324	1796	Co:bin	43
PID 740 wrote to memory of 1600	740	6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e.bin.exe	44
PID 740 wrote to memory of 1600	740	6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e.bin.exe	44
PID 740 wrote to memory of 1600	740	6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e.bin.exe	44
PID 740 wrote to memory of 1600	740	6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e.bin.exe	44
PID 1324 wrote to memory of 1620	1324	cmd.exe	47
PID 1324 wrote to memory of 1620	1324	cmd.exe	47
PID 1324 wrote to memory of 1620	1324	cmd.exe	47
PID 1324 wrote to memory of 1620	1324	cmd.exe	47
PID 1600 wrote to memory of 1468	1600	cmd.exe	48
PID 1600 wrote to memory of 1468	1600	cmd.exe	48
PID 1600 wrote to memory of 1468	1600	cmd.exe	48
PID 1600 wrote to memory of 1468	1600	cmd.exe	48
PID 1304 wrote to memory of 464	1304	cmd.exe	49
PID 1304 wrote to memory of 464	1304	cmd.exe	49
PID 1304 wrote to memory of 464	1304	cmd.exe	49
PID 1304 wrote to memory of 464	1304	cmd.exe	49
PID 1324 wrote to memory of 728	1324	cmd.exe	50
PID 1324 wrote to memory of 728	1324	cmd.exe	50
PID 1324 wrote to memory of 728	1324	cmd.exe	50
PID 1324 wrote to memory of 728	1324	cmd.exe	50
PID 1600 wrote to memory of 576	1600	cmd.exe	51
PID 1600 wrote to memory of 576	1600	cmd.exe	51
PID 1600 wrote to memory of 576	1600	cmd.exe	51
PID 1600 wrote to memory of 576	1600	cmd.exe	51

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
464	attrib.exe
728	attrib.exe
576	attrib.exe

C:\Users\Admin\AppData\Local\Temp\6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e.bin.exe
"C:\Users\Admin\AppData\Local\Temp\6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e.bin.exe"
1⤵
- Loads dropped DLL
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:740
- C:\Users\Admin\AppData\Roaming\Co:bin
  C:\Users\Admin\AppData\Roaming\Co:bin -r
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:1796
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:1976
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Co.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:784
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Co.exe /reset
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:840
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Co" & del "C:\Users\Admin\AppData\Roaming\Co"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1324
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:1620
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Co"
      4⤵
      Views/modifies file attributes
      PID:728
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e.bin.exe" & del "C:\Users\Admin\AppData\Local\Temp\6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e.bin.exe"
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1600
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:1468
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\6d35b01dbe014c6efc18d587c2be5e12617e1681cc670ba5c49fe7ead9de780e.bin.exe"
    3⤵
    - Views/modifies file attributes
    PID:576

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
PID:2040

C:\Windows\SysWOW64\Co.exe
C:\Windows\SysWOW64\Co.exe -s
1⤵
- Executes dropped EXE
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
PID:760
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Co.exe" & del "C:\Windows\SysWOW64\Co.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1304
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:1000
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Co.exe"
    3⤵
    - Drops file in System32 directory
    - Views/modifies file attributes
    PID:464

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Modify Existing Service

T1031

Privilege Escalation

Defense Evasion

File Deletion

T1107

File and Directory Permissions Modification

T1222

Hidden Files and Directories

T1158

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

T1490

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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