wastedlocker | db665f26dbc4ca92d326f2cb98faafb9e84d404346b201cd88bec91ce4206bb2

Resubmissions

16/03/2021, 14:56

210316-kx75lxvtys10

14/03/2021, 20:10

210314-cba5cgrcvn10

Analysis

max time kernel
21s
max time network
151s
platform
windows10_x64
resource
win10v20201028
submitted
14/03/2021, 20:10

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General

Target
db665f26dbc4ca92d326f2cb98faafb9e84d404346b201cd88bec91ce4206bb2.bin.exe
Size 1.2MB
Sample210314-cba5cgrcvn
SHA256 db665f26dbc4ca92d326f2cb98faafb9e84d404346b201cd88bec91ce4206bb2
MD5 82d841869e912a772413bb37f30307b0
SHA1 b75ab0170c1206c345d2fb82506e816098328ee8
SHA512 48078796a9aa03e685bebd14539586c099f30c3a1e18639d4acb810dc3bbb0dc14b09066797e79c34dcd91a120b08537aadf228585e226101384ade3fe2252c6
MD5 SHA1 SHA512

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
behavioral2/files/0x000200000001ab5f-5.dat	cryptone
behavioral2/files/0x000200000001ab5f-6.dat	cryptone
behavioral2/files/0x0003000000014bbd-11.dat	cryptone
behavioral2/files/0x0003000000014bbd-13.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
2668	Sam:bin
2700	Sam.exe

Modifies extensions of user files 12 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File created	C:\Users\Admin\Pictures\RemoveDismount.raw.howto_seccrypt	Sam.exe
File renamed	C:\Users\Admin\Pictures\RemoveDismount.raw => C:\Users\Admin\Pictures\RemoveDismount.raw.seccrypt	Sam.exe
File renamed	C:\Users\Admin\Pictures\ConvertExport.png => C:\Users\Admin\Pictures\ConvertExport.png.seccrypt	Sam.exe
File opened for modification	C:\Users\Admin\Pictures\ConvertExport.png.seccrypt	Sam.exe
File created	C:\Users\Admin\Pictures\NewRequest.raw.howto_seccrypt	Sam.exe
File created	C:\Users\Admin\Pictures\OptimizeClear.tif.howto_seccrypt	Sam.exe
File opened for modification	C:\Users\Admin\Pictures\OptimizeClear.tif.seccrypt	Sam.exe
File opened for modification	C:\Users\Admin\Pictures\RemoveDismount.raw.seccrypt	Sam.exe
File created	C:\Users\Admin\Pictures\ConvertExport.png.howto_seccrypt	Sam.exe
File renamed	C:\Users\Admin\Pictures\NewRequest.raw => C:\Users\Admin\Pictures\NewRequest.raw.seccrypt	Sam.exe
File opened for modification	C:\Users\Admin\Pictures\NewRequest.raw.seccrypt	Sam.exe
File renamed	C:\Users\Admin\Pictures\OptimizeClear.tif => C:\Users\Admin\Pictures\OptimizeClear.tif.seccrypt	Sam.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
2920	takeown.exe
1436	icacls.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2920	takeown.exe
1436	icacls.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Sam.exe	Sam:bin
File opened for modification	C:\Windows\SysWOW64\Sam.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
3308	vssadmin.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Sam:bin	db665f26dbc4ca92d326f2cb98faafb9e84d404346b201cd88bec91ce4206bb2.bin.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	2512	vssvc.exe
Token: SeRestorePrivilege	2512	vssvc.exe
Token: SeAuditPrivilege	2512	vssvc.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 728 wrote to memory of 2668	728	db665f26dbc4ca92d326f2cb98faafb9e84d404346b201cd88bec91ce4206bb2.bin.exe	75
PID 728 wrote to memory of 2668	728	db665f26dbc4ca92d326f2cb98faafb9e84d404346b201cd88bec91ce4206bb2.bin.exe	75
PID 728 wrote to memory of 2668	728	db665f26dbc4ca92d326f2cb98faafb9e84d404346b201cd88bec91ce4206bb2.bin.exe	75
PID 2668 wrote to memory of 3308	2668	Sam:bin	76
PID 2668 wrote to memory of 3308	2668	Sam:bin	76
PID 2668 wrote to memory of 2920	2668	Sam:bin	80
PID 2668 wrote to memory of 2920	2668	Sam:bin	80
PID 2668 wrote to memory of 2920	2668	Sam:bin	80
PID 2668 wrote to memory of 1436	2668	Sam:bin	82
PID 2668 wrote to memory of 1436	2668	Sam:bin	82
PID 2668 wrote to memory of 1436	2668	Sam:bin	82
PID 2700 wrote to memory of 1492	2700	Sam.exe	88
PID 2700 wrote to memory of 1492	2700	Sam.exe	88
PID 2700 wrote to memory of 1492	2700	Sam.exe	88
PID 1492 wrote to memory of 1872	1492	cmd.exe	90
PID 1492 wrote to memory of 1872	1492	cmd.exe	90
PID 1492 wrote to memory of 1872	1492	cmd.exe	90
PID 2668 wrote to memory of 2436	2668	Sam:bin	91
PID 2668 wrote to memory of 2436	2668	Sam:bin	91
PID 2668 wrote to memory of 2436	2668	Sam:bin	91
PID 728 wrote to memory of 2732	728	db665f26dbc4ca92d326f2cb98faafb9e84d404346b201cd88bec91ce4206bb2.bin.exe	93
PID 728 wrote to memory of 2732	728	db665f26dbc4ca92d326f2cb98faafb9e84d404346b201cd88bec91ce4206bb2.bin.exe	93
PID 728 wrote to memory of 2732	728	db665f26dbc4ca92d326f2cb98faafb9e84d404346b201cd88bec91ce4206bb2.bin.exe	93
PID 2436 wrote to memory of 264	2436	cmd.exe	96
PID 2436 wrote to memory of 264	2436	cmd.exe	96
PID 2436 wrote to memory of 264	2436	cmd.exe	96
PID 2732 wrote to memory of 276	2732	cmd.exe	95
PID 2732 wrote to memory of 276	2732	cmd.exe	95
PID 2732 wrote to memory of 276	2732	cmd.exe	95
PID 1492 wrote to memory of 1288	1492	cmd.exe	99
PID 1492 wrote to memory of 1288	1492	cmd.exe	99
PID 1492 wrote to memory of 1288	1492	cmd.exe	99
PID 2436 wrote to memory of 1592	2436	cmd.exe	100
PID 2436 wrote to memory of 1592	2436	cmd.exe	100
PID 2436 wrote to memory of 1592	2436	cmd.exe	100
PID 2732 wrote to memory of 3824	2732	cmd.exe	101
PID 2732 wrote to memory of 3824	2732	cmd.exe	101
PID 2732 wrote to memory of 3824	2732	cmd.exe	101

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
1288	attrib.exe
1592	attrib.exe
3824	attrib.exe

C:\Users\Admin\AppData\Local\Temp\db665f26dbc4ca92d326f2cb98faafb9e84d404346b201cd88bec91ce4206bb2.bin.exe
"C:\Users\Admin\AppData\Local\Temp\db665f26dbc4ca92d326f2cb98faafb9e84d404346b201cd88bec91ce4206bb2.bin.exe"
1⤵
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:728
- C:\Users\Admin\AppData\Roaming\Sam:bin
  C:\Users\Admin\AppData\Roaming\Sam:bin -r
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:2668
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:3308
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Sam.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:2920
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Sam.exe /reset
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:1436
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Sam" & del "C:\Users\Admin\AppData\Roaming\Sam"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2436
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:264
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Sam"
      4⤵
      Views/modifies file attributes
      PID:1592
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\db665f26dbc4ca92d326f2cb98faafb9e84d404346b201cd88bec91ce4206bb2.bin.exe" & del "C:\Users\Admin\AppData\Local\Temp\db665f26dbc4ca92d326f2cb98faafb9e84d404346b201cd88bec91ce4206bb2.bin.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2732
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:276
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\db665f26dbc4ca92d326f2cb98faafb9e84d404346b201cd88bec91ce4206bb2.bin.exe"
    3⤵
    - Views/modifies file attributes
    PID:3824

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2512

C:\Windows\SysWOW64\Sam.exe
C:\Windows\SysWOW64\Sam.exe -s
1⤵
- Executes dropped EXE
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
PID:2700
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Sam.exe" & del "C:\Windows\SysWOW64\Sam.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1492
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:1872
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Sam.exe"
    3⤵
    - Drops file in System32 directory
    - Views/modifies file attributes
    PID:1288

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/728-2-0x0000000000650000-0x0000000000660000-memory.dmp

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memory/728-3-0x0000000000400000-0x0000000000411000-memory.dmp

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Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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