wannacry | ed01ebfbc9eb5bbea545af4d01bf5f1071661840480439c6e5babe8e080e41aa

Analysis

max time kernel
150s
max time network
154s
platform
windows10_x64
resource
win10v20210408
submitted
11-05-2021 14:05

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General

Target

wannacry.exe
Size

3.4MB
MD5

84c82835a5d21bbcf75a61706d8ab549
SHA1

5ff465afaabcbf0150d1a3ab2c2e74f3a4426467
SHA256

ed01ebfbc9eb5bbea545af4d01bf5f1071661840480439c6e5babe8e080e41aa
SHA512

90723a50c20ba3643d625595fd6be8dcf88d70ff7f4b4719a88f055d5b3149a4231018ea30d375171507a147e59f73478c0c27948590794554d031e7d54b7244

Score

10^/10

wannacry discovery persistence ransomware spyware stealer worm

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\@[email protected]

Family

wannacry

Ransom Note

Q: What's wrong with my files? A: Ooops, your important files are encrypted. It means you will not be able to access them anymore until they are decrypted. If you follow our instructions, we guarantee that you can decrypt all your files quickly and safely! Let's start decrypting! Q: What do I do? A: First, you need to pay service fees for the decryption. Please send $300 worth of bitcoin to this bitcoin address: 115p7UMMngoj1pMvkpHijcRdfJNXj6LrLn Next, please find an application file named "@[email protected]". It is the decrypt software. Run and follow the instructions! (You may need to disable your antivirus for a while.) Q: How can I trust? A: Don't worry about decryption. We will decrypt your files surely because nobody will trust us if we cheat users. * If you need our assistance, send a message by clicking <Contact Us> on the decryptor window. �

Wallets

115p7UMMngoj1pMvkpHijcRdfJNXj6LrLn

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 16 IoCs

pid	Process
1480	taskdl.exe
3036	@[email protected]
2900	@[email protected]
1316	taskhsvc.exe
3180	taskse.exe
3952	@[email protected]
3708	taskdl.exe
680	taskdl.exe
2212	taskse.exe
3380	@[email protected]
2204	taskdl.exe
1276	taskse.exe
8	@[email protected]
2460	taskdl.exe
3456	taskse.exe
1096	@[email protected]

Modifies extensions of user files 12 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File opened for modification	C:\Users\Admin\Pictures\SuspendRestore.png.WNCRY	wannacry.exe
File renamed	C:\Users\Admin\Pictures\TraceConvertFrom.png.WNCRYT => C:\Users\Admin\Pictures\TraceConvertFrom.png.WNCRY	wannacry.exe
File opened for modification	C:\Users\Admin\Pictures\TraceConvertFrom.png.WNCRY	wannacry.exe
File created	C:\Users\Admin\Pictures\BackupRedo.tif.WNCRYT	wannacry.exe
File opened for modification	C:\Users\Admin\Pictures\BackupRedo.tif.WNCRY	wannacry.exe
File created	C:\Users\Admin\Pictures\JoinEnable.tif.WNCRYT	wannacry.exe
File renamed	C:\Users\Admin\Pictures\JoinEnable.tif.WNCRYT => C:\Users\Admin\Pictures\JoinEnable.tif.WNCRY	wannacry.exe
File created	C:\Users\Admin\Pictures\TraceConvertFrom.png.WNCRYT	wannacry.exe
File renamed	C:\Users\Admin\Pictures\BackupRedo.tif.WNCRYT => C:\Users\Admin\Pictures\BackupRedo.tif.WNCRY	wannacry.exe
File opened for modification	C:\Users\Admin\Pictures\JoinEnable.tif.WNCRY	wannacry.exe
File created	C:\Users\Admin\Pictures\SuspendRestore.png.WNCRYT	wannacry.exe
File renamed	C:\Users\Admin\Pictures\SuspendRestore.png.WNCRYT => C:\Users\Admin\Pictures\SuspendRestore.png.WNCRY	wannacry.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\~SD6C38.tmp	wannacry.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\~SD6C6E.tmp	wannacry.exe

Loads dropped DLL 8 IoCs

pid	Process
1316	taskhsvc.exe
1316	taskhsvc.exe
1316	taskhsvc.exe
1316	taskhsvc.exe
1316	taskhsvc.exe
1316	taskhsvc.exe
1316	taskhsvc.exe
1316	taskhsvc.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2084	icacls.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

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\brtxwnpzjg866 = "\"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

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Desktop\\@[email protected]"	wannacry.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Desktop\\@[email protected]"	@[email protected]

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

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
3288	vssadmin.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
3656	reg.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1316	taskhsvc.exe
1316	taskhsvc.exe
1316	taskhsvc.exe
1316	taskhsvc.exe
1316	taskhsvc.exe
1316	taskhsvc.exe

Suspicious use of AdjustPrivilegeToken 53 IoCs

description	pid	Process
Token: SeTcbPrivilege	3180	taskse.exe
Token: SeTcbPrivilege	3180	taskse.exe
Token: SeBackupPrivilege	512	vssvc.exe
Token: SeRestorePrivilege	512	vssvc.exe
Token: SeAuditPrivilege	512	vssvc.exe
Token: SeIncreaseQuotaPrivilege	3008	WMIC.exe
Token: SeSecurityPrivilege	3008	WMIC.exe
Token: SeTakeOwnershipPrivilege	3008	WMIC.exe
Token: SeLoadDriverPrivilege	3008	WMIC.exe
Token: SeSystemProfilePrivilege	3008	WMIC.exe
Token: SeSystemtimePrivilege	3008	WMIC.exe
Token: SeProfSingleProcessPrivilege	3008	WMIC.exe
Token: SeIncBasePriorityPrivilege	3008	WMIC.exe
Token: SeCreatePagefilePrivilege	3008	WMIC.exe
Token: SeBackupPrivilege	3008	WMIC.exe
Token: SeRestorePrivilege	3008	WMIC.exe
Token: SeShutdownPrivilege	3008	WMIC.exe
Token: SeDebugPrivilege	3008	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3008	WMIC.exe
Token: SeRemoteShutdownPrivilege	3008	WMIC.exe
Token: SeUndockPrivilege	3008	WMIC.exe
Token: SeManageVolumePrivilege	3008	WMIC.exe
Token: 33	3008	WMIC.exe
Token: 34	3008	WMIC.exe
Token: 35	3008	WMIC.exe
Token: 36	3008	WMIC.exe
Token: SeIncreaseQuotaPrivilege	3008	WMIC.exe
Token: SeSecurityPrivilege	3008	WMIC.exe
Token: SeTakeOwnershipPrivilege	3008	WMIC.exe
Token: SeLoadDriverPrivilege	3008	WMIC.exe
Token: SeSystemProfilePrivilege	3008	WMIC.exe
Token: SeSystemtimePrivilege	3008	WMIC.exe
Token: SeProfSingleProcessPrivilege	3008	WMIC.exe
Token: SeIncBasePriorityPrivilege	3008	WMIC.exe
Token: SeCreatePagefilePrivilege	3008	WMIC.exe
Token: SeBackupPrivilege	3008	WMIC.exe
Token: SeRestorePrivilege	3008	WMIC.exe
Token: SeShutdownPrivilege	3008	WMIC.exe
Token: SeDebugPrivilege	3008	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3008	WMIC.exe
Token: SeRemoteShutdownPrivilege	3008	WMIC.exe
Token: SeUndockPrivilege	3008	WMIC.exe
Token: SeManageVolumePrivilege	3008	WMIC.exe
Token: 33	3008	WMIC.exe
Token: 34	3008	WMIC.exe
Token: 35	3008	WMIC.exe
Token: 36	3008	WMIC.exe
Token: SeTcbPrivilege	2212	taskse.exe
Token: SeTcbPrivilege	2212	taskse.exe
Token: SeTcbPrivilege	1276	taskse.exe
Token: SeTcbPrivilege	1276	taskse.exe
Token: SeTcbPrivilege	3456	taskse.exe
Token: SeTcbPrivilege	3456	taskse.exe

Suspicious use of SetWindowsHookEx 9 IoCs

pid	Process
2900	@[email protected]
3036	@[email protected]
3036	@[email protected]
2900	@[email protected]
3952	@[email protected]
3952	@[email protected]
3380	@[email protected]
8	@[email protected]
1096	@[email protected]

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 4044 wrote to memory of 1948	4044	wannacry.exe	74
PID 4044 wrote to memory of 1948	4044	wannacry.exe	74
PID 4044 wrote to memory of 1948	4044	wannacry.exe	74
PID 4044 wrote to memory of 2084	4044	wannacry.exe	76
PID 4044 wrote to memory of 2084	4044	wannacry.exe	76
PID 4044 wrote to memory of 2084	4044	wannacry.exe	76
PID 4044 wrote to memory of 1480	4044	wannacry.exe	79
PID 4044 wrote to memory of 1480	4044	wannacry.exe	79
PID 4044 wrote to memory of 1480	4044	wannacry.exe	79
PID 4044 wrote to memory of 3780	4044	wannacry.exe	80
PID 4044 wrote to memory of 3780	4044	wannacry.exe	80
PID 4044 wrote to memory of 3780	4044	wannacry.exe	80
PID 3780 wrote to memory of 3380	3780	cmd.exe	82
PID 3780 wrote to memory of 3380	3780	cmd.exe	82
PID 3780 wrote to memory of 3380	3780	cmd.exe	82
PID 4044 wrote to memory of 3036	4044	wannacry.exe	83
PID 4044 wrote to memory of 3036	4044	wannacry.exe	83
PID 4044 wrote to memory of 3036	4044	wannacry.exe	83
PID 4044 wrote to memory of 3984	4044	wannacry.exe	84
PID 4044 wrote to memory of 3984	4044	wannacry.exe	84
PID 4044 wrote to memory of 3984	4044	wannacry.exe	84
PID 3984 wrote to memory of 2900	3984	cmd.exe	86
PID 3984 wrote to memory of 2900	3984	cmd.exe	86
PID 3984 wrote to memory of 2900	3984	cmd.exe	86
PID 3036 wrote to memory of 1316	3036	@[email protected]	88
PID 3036 wrote to memory of 1316	3036	@[email protected]	88
PID 3036 wrote to memory of 1316	3036	@[email protected]	88
PID 4044 wrote to memory of 3180	4044	wannacry.exe	90
PID 4044 wrote to memory of 3180	4044	wannacry.exe	90
PID 4044 wrote to memory of 3180	4044	wannacry.exe	90
PID 4044 wrote to memory of 3952	4044	wannacry.exe	91
PID 4044 wrote to memory of 3952	4044	wannacry.exe	91
PID 4044 wrote to memory of 3952	4044	wannacry.exe	91
PID 4044 wrote to memory of 2352	4044	wannacry.exe	95
PID 4044 wrote to memory of 2352	4044	wannacry.exe	95
PID 4044 wrote to memory of 2352	4044	wannacry.exe	95
PID 4044 wrote to memory of 3708	4044	wannacry.exe	92
PID 4044 wrote to memory of 3708	4044	wannacry.exe	92
PID 4044 wrote to memory of 3708	4044	wannacry.exe	92
PID 2352 wrote to memory of 3656	2352	cmd.exe	93
PID 2352 wrote to memory of 3656	2352	cmd.exe	93
PID 2352 wrote to memory of 3656	2352	cmd.exe	93
PID 2900 wrote to memory of 2736	2900	@[email protected]	99
PID 2900 wrote to memory of 2736	2900	@[email protected]	99
PID 2900 wrote to memory of 2736	2900	@[email protected]	99
PID 2736 wrote to memory of 3288	2736	cmd.exe	101
PID 2736 wrote to memory of 3288	2736	cmd.exe	101
PID 2736 wrote to memory of 3288	2736	cmd.exe	101
PID 2736 wrote to memory of 3008	2736	cmd.exe	103
PID 2736 wrote to memory of 3008	2736	cmd.exe	103
PID 2736 wrote to memory of 3008	2736	cmd.exe	103
PID 4044 wrote to memory of 680	4044	wannacry.exe	105
PID 4044 wrote to memory of 680	4044	wannacry.exe	105
PID 4044 wrote to memory of 680	4044	wannacry.exe	105
PID 4044 wrote to memory of 2212	4044	wannacry.exe	106
PID 4044 wrote to memory of 2212	4044	wannacry.exe	106
PID 4044 wrote to memory of 2212	4044	wannacry.exe	106
PID 4044 wrote to memory of 3380	4044	wannacry.exe	107
PID 4044 wrote to memory of 3380	4044	wannacry.exe	107
PID 4044 wrote to memory of 3380	4044	wannacry.exe	107
PID 4044 wrote to memory of 2204	4044	wannacry.exe	109
PID 4044 wrote to memory of 2204	4044	wannacry.exe	109
PID 4044 wrote to memory of 2204	4044	wannacry.exe	109
PID 4044 wrote to memory of 1276	4044	wannacry.exe	110

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
1948	attrib.exe

C:\Users\Admin\AppData\Local\Temp\wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\wannacry.exe"
1⤵
- Modifies extensions of user files
- Drops startup file
- Sets desktop wallpaper using registry
- Suspicious use of WriteProcessMemory
PID:4044
- C:\Windows\SysWOW64\attrib.exe
  attrib +h .
  2⤵
  - Views/modifies file attributes
  PID:1948
- C:\Windows\SysWOW64\icacls.exe
  icacls . /grant Everyone:F /T /C /Q
  2⤵
  - Modifies file permissions
  PID:2084
- C:\Users\Admin\AppData\Local\Temp\taskdl.exe
  taskdl.exe
  2⤵
  - Executes dropped EXE
  PID:1480
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c 42591620749027.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3780
- - C:\Windows\SysWOW64\cscript.exe
    cscript.exe //nologo m.vbs
    3⤵
    PID:3380
- C:\Users\Admin\AppData\Local\Temp\@[email protected]
  @[email protected] co
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3036
- - 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:1316
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c start /b @[email protected] vs
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3984
- - C:\Users\Admin\AppData\Local\Temp\@[email protected]
    @[email protected] vs
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2900
  - - 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:2736
    - - C:\Windows\SysWOW64\vssadmin.exe
        
        vssadmin delete shadows /all /quiet
        5⤵
        Interacts with shadow copies
        
        PID:3288
    - - C:\Windows\SysWOW64\Wbem\WMIC.exe
        
        wmic shadowcopy delete
        5⤵
        Suspicious use of AdjustPrivilegeToken
        
        PID:3008
- 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:3180
- C:\Users\Admin\AppData\Local\Temp\@[email protected]
  @[email protected]
  2⤵
  - Executes dropped EXE
  - Sets desktop wallpaper using registry
  - Suspicious use of SetWindowsHookEx
  PID:3952
- C:\Users\Admin\AppData\Local\Temp\taskdl.exe
  taskdl.exe
  2⤵
  - Executes dropped EXE
  PID:3708
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v "brtxwnpzjg866" /t REG_SZ /d "\"C:\Users\Admin\AppData\Local\Temp\tasksche.exe\"" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2352
- C:\Users\Admin\AppData\Local\Temp\taskdl.exe
  taskdl.exe
  2⤵
  - Executes dropped EXE
  PID:680
- 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:2212
- C:\Users\Admin\AppData\Local\Temp\@[email protected]
  @[email protected]
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:3380
- C:\Users\Admin\AppData\Local\Temp\taskdl.exe
  taskdl.exe
  2⤵
  - Executes dropped EXE
  PID:2204
- 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:1276
- C:\Users\Admin\AppData\Local\Temp\@[email protected]
  @[email protected]
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:8
- C:\Users\Admin\AppData\Local\Temp\taskdl.exe
  taskdl.exe
  2⤵
  - Executes dropped EXE
  PID:2460
- 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:3456
- C:\Users\Admin\AppData\Local\Temp\@[email protected]
  @[email protected]
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:1096

C:\Windows\SysWOW64\reg.exe
reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v "brtxwnpzjg866" /t REG_SZ /d "\"C:\Users\Admin\AppData\Local\Temp\tasksche.exe\"" /f
1⤵
- Adds Run key to start application
- Modifies registry key
PID:3656

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:512

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

File Deletion

T1107

File and Directory Permissions Modification

T1222

Hidden Files and Directories

T1158

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Defacement

T1491

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

memory/1316-194-0x0000000073150000-0x000000007336C000-memory.dmp

Filesize
2.1MB

Download
memory/1316-197-0x0000000073470000-0x00000000734F2000-memory.dmp

Filesize
520KB

Download
memory/1316-203-0x0000000001010000-0x000000000130E000-memory.dmp

Filesize
3.0MB

Download
memory/1316-202-0x0000000001010000-0x000000000130E000-memory.dmp

Filesize
3.0MB

Download
memory/1316-199-0x00000000733F0000-0x0000000073412000-memory.dmp

Filesize
136KB

Download
memory/1316-201-0x0000000073150000-0x000000007336C000-memory.dmp

Filesize
2.1MB

Download
memory/1316-198-0x0000000073470000-0x00000000734F2000-memory.dmp

Filesize
520KB

Download
memory/1316-195-0x0000000073520000-0x00000000735A2000-memory.dmp

Filesize
520KB

Download
memory/1316-193-0x0000000073520000-0x00000000735A2000-memory.dmp

Filesize
520KB

Download
memory/1316-200-0x00000000733F0000-0x0000000073412000-memory.dmp

Filesize
136KB

Download
memory/4044-152-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download