wannacry | ed01ebfbc9eb5bbea545af4d01bf5f1071661840480439c6e5babe8e080e41aa

Analysis

max time kernel
148s
max time network
149s
platform
windows10_x64
resource
win10v200217
submitted
20/03/2020, 09:02

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General

Target
1831.bin.exe
Size 3.4MB
Sample200320-kpvc8ebanj
SHA256 ed01ebfbc9eb5bbea545af4d01bf5f1071661840480439c6e5babe8e080e41aa
MD5 84c82835a5d21bbcf75a61706d8ab549
SHA1 5ff465afaabcbf0150d1a3ab2c2e74f3a4426467
SHA512 90723a50c20ba3643d625595fd6be8dcf88d70ff7f4b4719a88f055d5b3149a4231018ea30d375171507a147e59f73478c0c27948590794554d031e7d54b7244
MD5 SHA1 SHA512

Score

10^/10

discovery ransomware persistence worm wannacry

Malware Config

Extracted

Path

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

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: 12t9YDPgwueZ9NyMgw519p7AA8isjr6SMw 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

12t9YDPgwueZ9NyMgw519p7AA8isjr6SMw

Signatures

Adds Run entry 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\dzwzaxzeqy020 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\tasksche.exe\""	reg.exe

Modifies service 2 TTPs 4 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

Sets desktop wallpaper using registry 2 TTPs 2 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-638615289-2068236702-2426684043-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Desktop\\@[email protected]"	@[email protected]
Set value (str)	\REGISTRY\USER\S-1-5-21-638615289-2068236702-2426684043-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Desktop\\@[email protected]"	1831.bin.exe

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry

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
2940	vssadmin.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
976	icacls.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\~SD8ECC.tmp	1831.bin.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\~SD8EF2.tmp	1831.bin.exe

Loads dropped DLL 7 IoCs

pid	Process
3716	taskhsvc.exe
3716	taskhsvc.exe
3716	taskhsvc.exe
3716	taskhsvc.exe
3716	taskhsvc.exe
3716	taskhsvc.exe
3716	taskhsvc.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3716	taskhsvc.exe
3716	taskhsvc.exe
3716	taskhsvc.exe
3716	taskhsvc.exe
3716	taskhsvc.exe
3716	taskhsvc.exe

Suspicious use of SetWindowsHookEx 9 IoCs

pid	Process
2412	@[email protected]
3232	@[email protected]
3232	@[email protected]
2412	@[email protected]
3712	@[email protected]
3712	@[email protected]
2200	@[email protected]
1708	@[email protected]
2476	@[email protected]

Suspicious use of AdjustPrivilegeToken 53 IoCs

description	pid	Process
Token: SeTcbPrivilege	3492	taskse.exe
Token: SeTcbPrivilege	3492	taskse.exe
Token: SeBackupPrivilege	4080	vssvc.exe
Token: SeRestorePrivilege	4080	vssvc.exe
Token: SeAuditPrivilege	4080	vssvc.exe
Token: SeIncreaseQuotaPrivilege	716	WMIC.exe
Token: SeSecurityPrivilege	716	WMIC.exe
Token: SeTakeOwnershipPrivilege	716	WMIC.exe
Token: SeLoadDriverPrivilege	716	WMIC.exe
Token: SeSystemProfilePrivilege	716	WMIC.exe
Token: SeSystemtimePrivilege	716	WMIC.exe
Token: SeProfSingleProcessPrivilege	716	WMIC.exe
Token: SeIncBasePriorityPrivilege	716	WMIC.exe
Token: SeCreatePagefilePrivilege	716	WMIC.exe
Token: SeBackupPrivilege	716	WMIC.exe
Token: SeRestorePrivilege	716	WMIC.exe
Token: SeShutdownPrivilege	716	WMIC.exe
Token: SeDebugPrivilege	716	WMIC.exe
Token: SeSystemEnvironmentPrivilege	716	WMIC.exe
Token: SeRemoteShutdownPrivilege	716	WMIC.exe
Token: SeUndockPrivilege	716	WMIC.exe
Token: SeManageVolumePrivilege	716	WMIC.exe
Token: 33	716	WMIC.exe
Token: 34	716	WMIC.exe
Token: 35	716	WMIC.exe
Token: 36	716	WMIC.exe
Token: SeIncreaseQuotaPrivilege	716	WMIC.exe
Token: SeSecurityPrivilege	716	WMIC.exe
Token: SeTakeOwnershipPrivilege	716	WMIC.exe
Token: SeLoadDriverPrivilege	716	WMIC.exe
Token: SeSystemProfilePrivilege	716	WMIC.exe
Token: SeSystemtimePrivilege	716	WMIC.exe
Token: SeProfSingleProcessPrivilege	716	WMIC.exe
Token: SeIncBasePriorityPrivilege	716	WMIC.exe
Token: SeCreatePagefilePrivilege	716	WMIC.exe
Token: SeBackupPrivilege	716	WMIC.exe
Token: SeRestorePrivilege	716	WMIC.exe
Token: SeShutdownPrivilege	716	WMIC.exe
Token: SeDebugPrivilege	716	WMIC.exe
Token: SeSystemEnvironmentPrivilege	716	WMIC.exe
Token: SeRemoteShutdownPrivilege	716	WMIC.exe
Token: SeUndockPrivilege	716	WMIC.exe
Token: SeManageVolumePrivilege	716	WMIC.exe
Token: 33	716	WMIC.exe
Token: 34	716	WMIC.exe
Token: 35	716	WMIC.exe
Token: 36	716	WMIC.exe
Token: SeTcbPrivilege	2196	taskse.exe
Token: SeTcbPrivilege	2196	taskse.exe
Token: SeTcbPrivilege	584	taskse.exe
Token: SeTcbPrivilege	584	taskse.exe
Token: SeTcbPrivilege	3904	taskse.exe
Token: SeTcbPrivilege	3904	taskse.exe

Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
412	reg.exe

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
1404	attrib.exe

Suspicious use of WriteProcessMemory 78 IoCs

description	pid	Process	procid_target
PID 4052 wrote to memory of 1404	4052	1831.bin.exe	67
PID 4052 wrote to memory of 1404	4052	1831.bin.exe	67
PID 4052 wrote to memory of 1404	4052	1831.bin.exe	67
PID 4052 wrote to memory of 976	4052	1831.bin.exe	68
PID 4052 wrote to memory of 976	4052	1831.bin.exe	68
PID 4052 wrote to memory of 976	4052	1831.bin.exe	68
PID 4052 wrote to memory of 3140	4052	1831.bin.exe	71
PID 4052 wrote to memory of 3140	4052	1831.bin.exe	71
PID 4052 wrote to memory of 3140	4052	1831.bin.exe	71
PID 4052 wrote to memory of 3964	4052	1831.bin.exe	72
PID 4052 wrote to memory of 3964	4052	1831.bin.exe	72
PID 4052 wrote to memory of 3964	4052	1831.bin.exe	72
PID 3964 wrote to memory of 3956	3964	cmd.exe	74
PID 3964 wrote to memory of 3956	3964	cmd.exe	74
PID 3964 wrote to memory of 3956	3964	cmd.exe	74
PID 4052 wrote to memory of 3232	4052	1831.bin.exe	76
PID 4052 wrote to memory of 3232	4052	1831.bin.exe	76
PID 4052 wrote to memory of 3232	4052	1831.bin.exe	76
PID 4052 wrote to memory of 3340	4052	1831.bin.exe	77
PID 4052 wrote to memory of 3340	4052	1831.bin.exe	77
PID 4052 wrote to memory of 3340	4052	1831.bin.exe	77
PID 3340 wrote to memory of 2412	3340	cmd.exe	79
PID 3340 wrote to memory of 2412	3340	cmd.exe	79
PID 3340 wrote to memory of 2412	3340	cmd.exe	79
PID 4052 wrote to memory of 3492	4052	1831.bin.exe	81
PID 4052 wrote to memory of 3492	4052	1831.bin.exe	81
PID 4052 wrote to memory of 3492	4052	1831.bin.exe	81
PID 4052 wrote to memory of 3712	4052	1831.bin.exe	82
PID 4052 wrote to memory of 3712	4052	1831.bin.exe	82
PID 4052 wrote to memory of 3712	4052	1831.bin.exe	82
PID 4052 wrote to memory of 3704	4052	1831.bin.exe	83
PID 4052 wrote to memory of 3704	4052	1831.bin.exe	83
PID 4052 wrote to memory of 3704	4052	1831.bin.exe	83
PID 4052 wrote to memory of 420	4052	1831.bin.exe	85
PID 4052 wrote to memory of 420	4052	1831.bin.exe	85
PID 4052 wrote to memory of 420	4052	1831.bin.exe	85
PID 3232 wrote to memory of 3716	3232	@[email protected]	86
PID 3232 wrote to memory of 3716	3232	@[email protected]	86
PID 3232 wrote to memory of 3716	3232	@[email protected]	86
PID 3704 wrote to memory of 412	3704	cmd.exe	87
PID 3704 wrote to memory of 412	3704	cmd.exe	87
PID 3704 wrote to memory of 412	3704	cmd.exe	87
PID 2412 wrote to memory of 3928	2412	@[email protected]	89
PID 2412 wrote to memory of 3928	2412	@[email protected]	89
PID 2412 wrote to memory of 3928	2412	@[email protected]	89
PID 3928 wrote to memory of 2940	3928	cmd.exe	91
PID 3928 wrote to memory of 2940	3928	cmd.exe	91
PID 3928 wrote to memory of 2940	3928	cmd.exe	91
PID 3928 wrote to memory of 716	3928	cmd.exe	93
PID 3928 wrote to memory of 716	3928	cmd.exe	93
PID 3928 wrote to memory of 716	3928	cmd.exe	93
PID 4052 wrote to memory of 2248	4052	1831.bin.exe	95
PID 4052 wrote to memory of 2248	4052	1831.bin.exe	95
PID 4052 wrote to memory of 2248	4052	1831.bin.exe	95
PID 4052 wrote to memory of 2196	4052	1831.bin.exe	96
PID 4052 wrote to memory of 2196	4052	1831.bin.exe	96
PID 4052 wrote to memory of 2196	4052	1831.bin.exe	96
PID 4052 wrote to memory of 2200	4052	1831.bin.exe	97
PID 4052 wrote to memory of 2200	4052	1831.bin.exe	97
PID 4052 wrote to memory of 2200	4052	1831.bin.exe	97
PID 4052 wrote to memory of 636	4052	1831.bin.exe	99
PID 4052 wrote to memory of 636	4052	1831.bin.exe	99
PID 4052 wrote to memory of 636	4052	1831.bin.exe	99
PID 4052 wrote to memory of 584	4052	1831.bin.exe	100
PID 4052 wrote to memory of 584	4052	1831.bin.exe	100
PID 4052 wrote to memory of 584	4052	1831.bin.exe	100
PID 4052 wrote to memory of 1708	4052	1831.bin.exe	101
PID 4052 wrote to memory of 1708	4052	1831.bin.exe	101
PID 4052 wrote to memory of 1708	4052	1831.bin.exe	101
PID 4052 wrote to memory of 3904	4052	1831.bin.exe	108
PID 4052 wrote to memory of 3904	4052	1831.bin.exe	108
PID 4052 wrote to memory of 3904	4052	1831.bin.exe	108
PID 4052 wrote to memory of 2476	4052	1831.bin.exe	109
PID 4052 wrote to memory of 2476	4052	1831.bin.exe	109
PID 4052 wrote to memory of 2476	4052	1831.bin.exe	109
PID 4052 wrote to memory of 3084	4052	1831.bin.exe	110
PID 4052 wrote to memory of 3084	4052	1831.bin.exe	110
PID 4052 wrote to memory of 3084	4052	1831.bin.exe	110

Executes dropped EXE 16 IoCs

pid	Process
3140	taskdl.exe
3232	@[email protected]
2412	@[email protected]
3492	taskse.exe
3712	@[email protected]
420	taskdl.exe
3716	taskhsvc.exe
2248	taskdl.exe
2196	taskse.exe
2200	@[email protected]
636	taskdl.exe
584	taskse.exe
1708	@[email protected]
3904	taskse.exe
2476	@[email protected]
3084	taskdl.exe

C:\Users\Admin\AppData\Local\Temp\1831.bin.exe
"C:\Users\Admin\AppData\Local\Temp\1831.bin.exe"
1⤵
- Sets desktop wallpaper using registry
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:4052
- C:\Windows\SysWOW64\attrib.exe
  attrib +h .
  2⤵
  - Views/modifies file attributes
  PID:1404
- C:\Windows\SysWOW64\icacls.exe
  icacls . /grant Everyone:F /T /C /Q
  2⤵
  - Modifies file permissions
  PID:976
- C:\Users\Admin\AppData\Local\Temp\taskdl.exe
  taskdl.exe
  2⤵
  - Executes dropped EXE
  PID:3140
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c 283351584698556.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3964
- - C:\Windows\SysWOW64\cscript.exe
    cscript.exe //nologo m.vbs
    3⤵
    PID:3956
- C:\Users\Admin\AppData\Local\Temp\@[email protected]
  @[email protected] co
  2⤵
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  - Executes dropped EXE
  PID:3232
- - C:\Users\Admin\AppData\Local\Temp\TaskData\Tor\taskhsvc.exe
    TaskData\Tor\taskhsvc.exe
    3⤵
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Executes dropped EXE
    PID:3716
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c start /b @[email protected] vs
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3340
- - C:\Users\Admin\AppData\Local\Temp\@[email protected]
    @[email protected] vs
    3⤵
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    - Executes dropped EXE
    PID:2412
  - - 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:3928
    - - C:\Windows\SysWOW64\vssadmin.exe
        
        vssadmin delete shadows /all /quiet
        5⤵
        Interacts with shadow copies
        
        PID:2940
    - - C:\Windows\SysWOW64\Wbem\WMIC.exe
        
        wmic shadowcopy delete
        5⤵
        Suspicious use of AdjustPrivilegeToken
        
        PID:716
- C:\Users\Admin\AppData\Local\Temp\taskse.exe
  taskse.exe C:\Users\Admin\AppData\Local\Temp\@[email protected]
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Executes dropped EXE
  PID:3492
- C:\Users\Admin\AppData\Local\Temp\@[email protected]
  @[email protected]
  2⤵
  - Sets desktop wallpaper using registry
  - Suspicious use of SetWindowsHookEx
  - Executes dropped EXE
  PID:3712
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v "dzwzaxzeqy020" /t REG_SZ /d "\"C:\Users\Admin\AppData\Local\Temp\tasksche.exe\"" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3704
- - C:\Windows\SysWOW64\reg.exe
    reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v "dzwzaxzeqy020" /t REG_SZ /d "\"C:\Users\Admin\AppData\Local\Temp\tasksche.exe\"" /f
    3⤵
    - Adds Run entry to start application
    - Modifies registry key
    PID:412
- C:\Users\Admin\AppData\Local\Temp\taskdl.exe
  taskdl.exe
  2⤵
  - Executes dropped EXE
  PID:420
- 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⤵
  - Suspicious use of AdjustPrivilegeToken
  - Executes dropped EXE
  PID:2196
- C:\Users\Admin\AppData\Local\Temp\@[email protected]
  @[email protected]
  2⤵
  - Suspicious use of SetWindowsHookEx
  - Executes dropped EXE
  PID:2200
- C:\Users\Admin\AppData\Local\Temp\taskdl.exe
  taskdl.exe
  2⤵
  - Executes dropped EXE
  PID:636
- C:\Users\Admin\AppData\Local\Temp\taskse.exe
  taskse.exe C:\Users\Admin\AppData\Local\Temp\@[email protected]
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Executes dropped EXE
  PID:584
- C:\Users\Admin\AppData\Local\Temp\@[email protected]
  @[email protected]
  2⤵
  - Suspicious use of SetWindowsHookEx
  - Executes dropped EXE
  PID:1708
- C:\Users\Admin\AppData\Local\Temp\taskse.exe
  taskse.exe C:\Users\Admin\AppData\Local\Temp\@[email protected]
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Executes dropped EXE
  PID:3904
- C:\Users\Admin\AppData\Local\Temp\@[email protected]
  @[email protected]
  2⤵
  - Suspicious use of SetWindowsHookEx
  - Executes dropped EXE
  PID:2476
- C:\Users\Admin\AppData\Local\Temp\taskdl.exe
  taskdl.exe
  2⤵
  - Executes dropped EXE
  PID:3084

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
PID:4080

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Modify Existing Service

T1031

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

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

T1491

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

memory/3716-138-0x0000000002F00000-0x0000000002F01000-memory.dmp

Download

memory/3716-231-0x0000000002F00000-0x0000000002F01000-memory.dmp

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memory/3716-66-0x0000000003700000-0x0000000003701000-memory.dmp

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memory/3716-67-0x0000000002F00000-0x0000000002F01000-memory.dmp

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memory/3716-71-0x0000000002F00000-0x0000000002F01000-memory.dmp

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memory/3716-118-0x0000000002F00000-0x0000000002F01000-memory.dmp

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memory/3716-398-0x00000000034E0000-0x00000000034E1000-memory.dmp

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memory/3716-229-0x0000000002F00000-0x0000000002F01000-memory.dmp

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memory/3716-65-0x0000000002F00000-0x0000000002F01000-memory.dmp

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memory/3716-230-0x0000000003700000-0x0000000003701000-memory.dmp

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memory/3716-205-0x0000000002F00000-0x0000000002F01000-memory.dmp

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memory/3716-300-0x0000000002F00000-0x0000000002F01000-memory.dmp

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memory/3716-395-0x00000000034E0000-0x00000000034E1000-memory.dmp

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memory/3716-396-0x0000000003CE0000-0x0000000003CE1000-memory.dmp

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memory/4052-36-0x0000000010000000-0x0000000010010000-memory.dmp

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