wannacry | ed01ebfbc9eb5bbea545af4d01bf5f1071661840480439c6e5babe8e080e41aa

General

Target

wanacryptor.exe
Size

3.4MB
MD5

84c82835a5d21bbcf75a61706d8ab549
SHA1

5ff465afaabcbf0150d1a3ab2c2e74f3a4426467
SHA256

ed01ebfbc9eb5bbea545af4d01bf5f1071661840480439c6e5babe8e080e41aa
SHA512

90723a50c20ba3643d625595fd6be8dcf88d70ff7f4b4719a88f055d5b3149a4231018ea30d375171507a147e59f73478c0c27948590794554d031e7d54b7244

Score

10^/10

wannacry discovery persistence ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
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 10 IoCs

Processes:

taskdl.exe@[email protected]@[email protected]taskhsvc.exetaskdl.exetaskse.exe@[email protected]taskdl.exetaskse.exe@[email protected]

pid	process
1644	taskdl.exe
2044	@[email protected]
2004	@[email protected]
848	taskhsvc.exe
2092	taskdl.exe
2112	taskse.exe
2128	@[email protected]
2248	taskdl.exe
2276	taskse.exe
2292	@[email protected]

Drops startup file 1 IoCs

Processes:

wanacryptor.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\~SDFDBF.tmp	wanacryptor.exe

Loads dropped DLL 27 IoCs

Processes:

wanacryptor.execscript.execmd.exe@[email protected]taskhsvc.exe

pid	process
832	wanacryptor.exe
832	wanacryptor.exe
1812	cscript.exe
832	wanacryptor.exe
832	wanacryptor.exe
1716	cmd.exe
1716	cmd.exe
2044	@[email protected]
2044	@[email protected]
848	taskhsvc.exe
848	taskhsvc.exe
848	taskhsvc.exe
848	taskhsvc.exe
848	taskhsvc.exe
848	taskhsvc.exe
832	wanacryptor.exe
832	wanacryptor.exe
832	wanacryptor.exe
832	wanacryptor.exe
832	wanacryptor.exe
832	wanacryptor.exe
832	wanacryptor.exe
832	wanacryptor.exe
832	wanacryptor.exe
832	wanacryptor.exe
832	wanacryptor.exe
832	wanacryptor.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File Permissions Modification
T1222

Processes:

icacls.exe

pid process

1816 icacls.exe

pid	process
1816	icacls.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\shlszrguggsj862 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\tasksche.exe\""	reg.exe

Sets desktop wallpaper using registry 2 TTPs 2 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

Processes:

wanacryptor.exe@[email protected]

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1989557640-2751554375-944500773-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Desktop\\@[email protected]"	wanacryptor.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1989557640-2751554375-944500773-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Desktop\\@[email protected]"	@[email protected]

Detects application with GUI, possible interaction required
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

Processes:

vssadmin.exe

pid process

1236 vssadmin.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

reg.exe

pid process

2176 reg.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

taskhsvc.exe

pid process

848 taskhsvc.exe
848 taskhsvc.exe
848 taskhsvc.exe

pid	process
1236	vssadmin.exe

pid	process
2176	reg.exe

pid	process
848	taskhsvc.exe
848	taskhsvc.exe
848	taskhsvc.exe

Suspicious use of AdjustPrivilegeToken 47 IoCs

Processes:

vssvc.exeWMIC.exetaskse.exetaskse.exe

description	pid	process
Token: SeBackupPrivilege	1492	vssvc.exe
Token: SeRestorePrivilege	1492	vssvc.exe
Token: SeAuditPrivilege	1492	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1916	WMIC.exe
Token: SeSecurityPrivilege	1916	WMIC.exe
Token: SeTakeOwnershipPrivilege	1916	WMIC.exe
Token: SeLoadDriverPrivilege	1916	WMIC.exe
Token: SeSystemProfilePrivilege	1916	WMIC.exe
Token: SeSystemtimePrivilege	1916	WMIC.exe
Token: SeProfSingleProcessPrivilege	1916	WMIC.exe
Token: SeIncBasePriorityPrivilege	1916	WMIC.exe
Token: SeCreatePagefilePrivilege	1916	WMIC.exe
Token: SeBackupPrivilege	1916	WMIC.exe
Token: SeRestorePrivilege	1916	WMIC.exe
Token: SeShutdownPrivilege	1916	WMIC.exe
Token: SeDebugPrivilege	1916	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1916	WMIC.exe
Token: SeRemoteShutdownPrivilege	1916	WMIC.exe
Token: SeUndockPrivilege	1916	WMIC.exe
Token: SeManageVolumePrivilege	1916	WMIC.exe
Token: 33	1916	WMIC.exe
Token: 34	1916	WMIC.exe
Token: 35	1916	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1916	WMIC.exe
Token: SeSecurityPrivilege	1916	WMIC.exe
Token: SeTakeOwnershipPrivilege	1916	WMIC.exe
Token: SeLoadDriverPrivilege	1916	WMIC.exe
Token: SeSystemProfilePrivilege	1916	WMIC.exe
Token: SeSystemtimePrivilege	1916	WMIC.exe
Token: SeProfSingleProcessPrivilege	1916	WMIC.exe
Token: SeIncBasePriorityPrivilege	1916	WMIC.exe
Token: SeCreatePagefilePrivilege	1916	WMIC.exe
Token: SeBackupPrivilege	1916	WMIC.exe
Token: SeRestorePrivilege	1916	WMIC.exe
Token: SeShutdownPrivilege	1916	WMIC.exe
Token: SeDebugPrivilege	1916	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1916	WMIC.exe
Token: SeRemoteShutdownPrivilege	1916	WMIC.exe
Token: SeUndockPrivilege	1916	WMIC.exe
Token: SeManageVolumePrivilege	1916	WMIC.exe
Token: 33	1916	WMIC.exe
Token: 34	1916	WMIC.exe
Token: 35	1916	WMIC.exe
Token: SeTcbPrivilege	2112	taskse.exe
Token: SeTcbPrivilege	2112	taskse.exe
Token: SeTcbPrivilege	2276	taskse.exe
Token: SeTcbPrivilege	2276	taskse.exe

Suspicious use of SetWindowsHookEx 7 IoCs

Processes:

@[email protected]@[email protected]@[email protected]@[email protected]

pid	process
2004	@[email protected]
2044	@[email protected]
2004	@[email protected]
2044	@[email protected]
2128	@[email protected]
2128	@[email protected]
2292	@[email protected]

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

wanacryptor.execmd.execmd.exe@[email protected]@[email protected]cmd.exe

description	pid	process	target process
PID 832 wrote to memory of 1980	832	wanacryptor.exe	attrib.exe
PID 832 wrote to memory of 1980	832	wanacryptor.exe	attrib.exe
PID 832 wrote to memory of 1980	832	wanacryptor.exe	attrib.exe
PID 832 wrote to memory of 1980	832	wanacryptor.exe	attrib.exe
PID 832 wrote to memory of 1816	832	wanacryptor.exe	icacls.exe
PID 832 wrote to memory of 1816	832	wanacryptor.exe	icacls.exe
PID 832 wrote to memory of 1816	832	wanacryptor.exe	icacls.exe
PID 832 wrote to memory of 1816	832	wanacryptor.exe	icacls.exe
PID 832 wrote to memory of 1644	832	wanacryptor.exe	taskdl.exe
PID 832 wrote to memory of 1644	832	wanacryptor.exe	taskdl.exe
PID 832 wrote to memory of 1644	832	wanacryptor.exe	taskdl.exe
PID 832 wrote to memory of 1644	832	wanacryptor.exe	taskdl.exe
PID 832 wrote to memory of 1092	832	wanacryptor.exe	cmd.exe
PID 832 wrote to memory of 1092	832	wanacryptor.exe	cmd.exe
PID 832 wrote to memory of 1092	832	wanacryptor.exe	cmd.exe
PID 832 wrote to memory of 1092	832	wanacryptor.exe	cmd.exe
PID 1092 wrote to memory of 1812	1092	cmd.exe	cscript.exe
PID 1092 wrote to memory of 1812	1092	cmd.exe	cscript.exe
PID 1092 wrote to memory of 1812	1092	cmd.exe	cscript.exe
PID 1092 wrote to memory of 1812	1092	cmd.exe	cscript.exe
PID 832 wrote to memory of 2044	832	wanacryptor.exe	@[email protected]
PID 832 wrote to memory of 2044	832	wanacryptor.exe	@[email protected]
PID 832 wrote to memory of 2044	832	wanacryptor.exe	@[email protected]
PID 832 wrote to memory of 2044	832	wanacryptor.exe	@[email protected]
PID 832 wrote to memory of 1716	832	wanacryptor.exe	cmd.exe
PID 832 wrote to memory of 1716	832	wanacryptor.exe	cmd.exe
PID 832 wrote to memory of 1716	832	wanacryptor.exe	cmd.exe
PID 832 wrote to memory of 1716	832	wanacryptor.exe	cmd.exe
PID 1716 wrote to memory of 2004	1716	cmd.exe	@[email protected]
PID 1716 wrote to memory of 2004	1716	cmd.exe	@[email protected]
PID 1716 wrote to memory of 2004	1716	cmd.exe	@[email protected]
PID 1716 wrote to memory of 2004	1716	cmd.exe	@[email protected]
PID 2044 wrote to memory of 848	2044	@[email protected]	taskhsvc.exe
PID 2044 wrote to memory of 848	2044	@[email protected]	taskhsvc.exe
PID 2044 wrote to memory of 848	2044	@[email protected]	taskhsvc.exe
PID 2044 wrote to memory of 848	2044	@[email protected]	taskhsvc.exe
PID 2004 wrote to memory of 1108	2004	@[email protected]	cmd.exe
PID 2004 wrote to memory of 1108	2004	@[email protected]	cmd.exe
PID 2004 wrote to memory of 1108	2004	@[email protected]	cmd.exe
PID 2004 wrote to memory of 1108	2004	@[email protected]	cmd.exe
PID 1108 wrote to memory of 1236	1108	cmd.exe	vssadmin.exe
PID 1108 wrote to memory of 1236	1108	cmd.exe	vssadmin.exe
PID 1108 wrote to memory of 1236	1108	cmd.exe	vssadmin.exe
PID 1108 wrote to memory of 1236	1108	cmd.exe	vssadmin.exe
PID 1108 wrote to memory of 1916	1108	cmd.exe	WMIC.exe
PID 1108 wrote to memory of 1916	1108	cmd.exe	WMIC.exe
PID 1108 wrote to memory of 1916	1108	cmd.exe	WMIC.exe
PID 1108 wrote to memory of 1916	1108	cmd.exe	WMIC.exe
PID 832 wrote to memory of 2092	832	wanacryptor.exe	taskdl.exe
PID 832 wrote to memory of 2092	832	wanacryptor.exe	taskdl.exe
PID 832 wrote to memory of 2092	832	wanacryptor.exe	taskdl.exe
PID 832 wrote to memory of 2092	832	wanacryptor.exe	taskdl.exe
PID 832 wrote to memory of 2112	832	wanacryptor.exe	taskse.exe
PID 832 wrote to memory of 2112	832	wanacryptor.exe	taskse.exe
PID 832 wrote to memory of 2112	832	wanacryptor.exe	taskse.exe
PID 832 wrote to memory of 2112	832	wanacryptor.exe	taskse.exe
PID 832 wrote to memory of 2128	832	wanacryptor.exe	@[email protected]
PID 832 wrote to memory of 2128	832	wanacryptor.exe	@[email protected]
PID 832 wrote to memory of 2128	832	wanacryptor.exe	@[email protected]
PID 832 wrote to memory of 2128	832	wanacryptor.exe	@[email protected]
PID 832 wrote to memory of 2144	832	wanacryptor.exe	cmd.exe
PID 832 wrote to memory of 2144	832	wanacryptor.exe	cmd.exe
PID 832 wrote to memory of 2144	832	wanacryptor.exe	cmd.exe
PID 832 wrote to memory of 2144	832	wanacryptor.exe	cmd.exe

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware
Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

1980 attrib.exe

pid	process
1980	attrib.exe

C:\Users\Admin\AppData\Local\Temp\wanacryptor.exe
C:\Users\Admin\AppData\Local\Temp\wanacryptor.exe
1⤵
- Drops startup file
- Loads dropped DLL
- Sets desktop wallpaper using registry
- Suspicious use of WriteProcessMemory
PID:832

C:\Windows\SysWOW64\attrib.exe
attrib +h .
2⤵
- Views/modifies file attributes
PID:1980

C:\Windows\SysWOW64\icacls.exe
icacls . /grant Everyone:F /T /C /Q
2⤵
- Modifies file permissions
PID:1816

C:\Users\Admin\AppData\Local\Temp\taskdl.exe
taskdl.exe
2⤵
- Executes dropped EXE
PID:1644

C:\Windows\SysWOW64\cmd.exe
cmd /c 123981557332750.bat
2⤵
- Suspicious use of WriteProcessMemory
PID:1092

C:\Windows\SysWOW64\cscript.exe
cscript.exe //nologo m.vbs
3⤵
- Loads dropped DLL
PID:1812

C:\Users\Admin\AppData\Local\Temp\@[email protected]
@[email protected] co
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2044

C:\Users\Admin\AppData\Local\Temp\TaskData\Tor\taskhsvc.exe
TaskData\Tor\taskhsvc.exe
3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
PID:848

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c start /b @[email protected] vs
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1716

C:\Users\Admin\AppData\Local\Temp\@[email protected]
@[email protected] vs
3⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2004

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c vssadmin delete shadows /all /quiet & wmic shadowcopy delete & bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no & wbadmin delete catalog -quiet
4⤵
- Suspicious use of WriteProcessMemory
PID:1108

C:\Windows\SysWOW64\vssadmin.exe
vssadmin delete shadows /all /quiet
5⤵
- Interacts with shadow copies
PID:1236

C:\Windows\SysWOW64\Wbem\WMIC.exe
wmic shadowcopy delete
5⤵
- Suspicious use of AdjustPrivilegeToken
PID:1916

C:\Users\Admin\AppData\Local\Temp\taskdl.exe
taskdl.exe
2⤵
- Executes dropped EXE
PID:2092

C:\Users\Admin\AppData\Local\Temp\taskse.exe
taskse.exe C:\Users\Admin\AppData\Local\Temp\@[email protected]
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2112

C:\Users\Admin\AppData\Local\Temp\@[email protected]
@[email protected]
2⤵
- Executes dropped EXE
- Sets desktop wallpaper using registry
- Suspicious use of SetWindowsHookEx
PID:2128

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v "shlszrguggsj862" /t REG_SZ /d "\"C:\Users\Admin\AppData\Local\Temp\tasksche.exe\"" /f
2⤵
PID:2144

C:\Windows\SysWOW64\reg.exe
reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v "shlszrguggsj862" /t REG_SZ /d "\"C:\Users\Admin\AppData\Local\Temp\tasksche.exe\"" /f
3⤵
- Adds Run key to start application
- Modifies registry key
PID:2176

C:\Users\Admin\AppData\Local\Temp\taskdl.exe
taskdl.exe
2⤵
- Executes dropped EXE
PID:2248

C:\Users\Admin\AppData\Local\Temp\taskse.exe
taskse.exe C:\Users\Admin\AppData\Local\Temp\@[email protected]
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2276