wannacry | f285cc074fe34b901caf02c39b43191ac3e2841645a995b31079d434a032e2c0

Analysis

max time kernel
145s
max time network
131s
platform
windows10_x64
resource
win10v20210410
submitted
11-06-2021 14:52

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General

Target

muestra1.bin.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: 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

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
1072	taskdl.exe
2832	@[email protected]
2344	@[email protected]
2736	taskhsvc.exe
3776	taskdl.exe
3868	taskse.exe
2288	@[email protected]
1492	taskdl.exe
1260	taskse.exe
2368	@[email protected]
3888	taskdl.exe
2228	taskse.exe
2256	@[email protected]
3928	taskse.exe
3224	@[email protected]
3868	taskdl.exe

Modifies extensions of user files 3 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\ExportBlock.raw.WNCRYT => C:\Users\Admin\Pictures\ExportBlock.raw.WNCRY	muestra1.bin.exe
File opened for modification	C:\Users\Admin\Pictures\ExportBlock.raw.WNCRY	muestra1.bin.exe
File created	C:\Users\Admin\Pictures\ExportBlock.raw.WNCRYT	muestra1.bin.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\~SD3717.tmp	muestra1.bin.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\~SD371E.tmp	muestra1.bin.exe

Loads dropped DLL 7 IoCs

pid	Process
2736	taskhsvc.exe
2736	taskhsvc.exe
2736	taskhsvc.exe
2736	taskhsvc.exe
2736	taskhsvc.exe
2736	taskhsvc.exe
2736	taskhsvc.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
816	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\dfevzalm316 = "\"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-1-5-21-3686645723-710336880-414668232-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Desktop\\@[email protected]"	muestra1.bin.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\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
500	vssadmin.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
2332	reg.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2736	taskhsvc.exe
2736	taskhsvc.exe
2736	taskhsvc.exe
2736	taskhsvc.exe
2736	taskhsvc.exe
2736	taskhsvc.exe

Suspicious use of AdjustPrivilegeToken 53 IoCs

description	pid	Process
Token: SeBackupPrivilege	2148	vssvc.exe
Token: SeRestorePrivilege	2148	vssvc.exe
Token: SeAuditPrivilege	2148	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2836	WMIC.exe
Token: SeSecurityPrivilege	2836	WMIC.exe
Token: SeTakeOwnershipPrivilege	2836	WMIC.exe
Token: SeLoadDriverPrivilege	2836	WMIC.exe
Token: SeSystemProfilePrivilege	2836	WMIC.exe
Token: SeSystemtimePrivilege	2836	WMIC.exe
Token: SeProfSingleProcessPrivilege	2836	WMIC.exe
Token: SeIncBasePriorityPrivilege	2836	WMIC.exe
Token: SeCreatePagefilePrivilege	2836	WMIC.exe
Token: SeBackupPrivilege	2836	WMIC.exe
Token: SeRestorePrivilege	2836	WMIC.exe
Token: SeShutdownPrivilege	2836	WMIC.exe
Token: SeDebugPrivilege	2836	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2836	WMIC.exe
Token: SeRemoteShutdownPrivilege	2836	WMIC.exe
Token: SeUndockPrivilege	2836	WMIC.exe
Token: SeManageVolumePrivilege	2836	WMIC.exe
Token: 33	2836	WMIC.exe
Token: 34	2836	WMIC.exe
Token: 35	2836	WMIC.exe
Token: 36	2836	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2836	WMIC.exe
Token: SeSecurityPrivilege	2836	WMIC.exe
Token: SeTakeOwnershipPrivilege	2836	WMIC.exe
Token: SeLoadDriverPrivilege	2836	WMIC.exe
Token: SeSystemProfilePrivilege	2836	WMIC.exe
Token: SeSystemtimePrivilege	2836	WMIC.exe
Token: SeProfSingleProcessPrivilege	2836	WMIC.exe
Token: SeIncBasePriorityPrivilege	2836	WMIC.exe
Token: SeCreatePagefilePrivilege	2836	WMIC.exe
Token: SeBackupPrivilege	2836	WMIC.exe
Token: SeRestorePrivilege	2836	WMIC.exe
Token: SeShutdownPrivilege	2836	WMIC.exe
Token: SeDebugPrivilege	2836	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2836	WMIC.exe
Token: SeRemoteShutdownPrivilege	2836	WMIC.exe
Token: SeUndockPrivilege	2836	WMIC.exe
Token: SeManageVolumePrivilege	2836	WMIC.exe
Token: 33	2836	WMIC.exe
Token: 34	2836	WMIC.exe
Token: 35	2836	WMIC.exe
Token: 36	2836	WMIC.exe
Token: SeTcbPrivilege	3868	taskse.exe
Token: SeTcbPrivilege	3868	taskse.exe
Token: SeTcbPrivilege	1260	taskse.exe
Token: SeTcbPrivilege	1260	taskse.exe
Token: SeTcbPrivilege	2228	taskse.exe
Token: SeTcbPrivilege	2228	taskse.exe
Token: SeTcbPrivilege	3928	taskse.exe
Token: SeTcbPrivilege	3928	taskse.exe

Suspicious use of SetWindowsHookEx 9 IoCs

pid	Process
2832	@[email protected]
2832	@[email protected]
2344	@[email protected]
2344	@[email protected]
2288	@[email protected]
2288	@[email protected]
2368	@[email protected]
2256	@[email protected]
3224	@[email protected]

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2680 wrote to memory of 576	2680	muestra1.bin.exe	72
PID 2680 wrote to memory of 576	2680	muestra1.bin.exe	72
PID 2680 wrote to memory of 576	2680	muestra1.bin.exe	72
PID 2680 wrote to memory of 816	2680	muestra1.bin.exe	73
PID 2680 wrote to memory of 816	2680	muestra1.bin.exe	73
PID 2680 wrote to memory of 816	2680	muestra1.bin.exe	73
PID 2680 wrote to memory of 1072	2680	muestra1.bin.exe	80
PID 2680 wrote to memory of 1072	2680	muestra1.bin.exe	80
PID 2680 wrote to memory of 1072	2680	muestra1.bin.exe	80
PID 2680 wrote to memory of 748	2680	muestra1.bin.exe	81
PID 2680 wrote to memory of 748	2680	muestra1.bin.exe	81
PID 2680 wrote to memory of 748	2680	muestra1.bin.exe	81
PID 748 wrote to memory of 972	748	cmd.exe	83
PID 748 wrote to memory of 972	748	cmd.exe	83
PID 748 wrote to memory of 972	748	cmd.exe	83
PID 2680 wrote to memory of 2832	2680	muestra1.bin.exe	85
PID 2680 wrote to memory of 2832	2680	muestra1.bin.exe	85
PID 2680 wrote to memory of 2832	2680	muestra1.bin.exe	85
PID 2680 wrote to memory of 2876	2680	muestra1.bin.exe	86
PID 2680 wrote to memory of 2876	2680	muestra1.bin.exe	86
PID 2680 wrote to memory of 2876	2680	muestra1.bin.exe	86
PID 2876 wrote to memory of 2344	2876	cmd.exe	88
PID 2876 wrote to memory of 2344	2876	cmd.exe	88
PID 2876 wrote to memory of 2344	2876	cmd.exe	88
PID 2832 wrote to memory of 2736	2832	@[email protected]	90
PID 2832 wrote to memory of 2736	2832	@[email protected]	90
PID 2832 wrote to memory of 2736	2832	@[email protected]	90
PID 2344 wrote to memory of 2368	2344	@[email protected]	95
PID 2344 wrote to memory of 2368	2344	@[email protected]	95
PID 2344 wrote to memory of 2368	2344	@[email protected]	95
PID 2368 wrote to memory of 500	2368	cmd.exe	97
PID 2368 wrote to memory of 500	2368	cmd.exe	97
PID 2368 wrote to memory of 500	2368	cmd.exe	97
PID 2368 wrote to memory of 2836	2368	cmd.exe	99
PID 2368 wrote to memory of 2836	2368	cmd.exe	99
PID 2368 wrote to memory of 2836	2368	cmd.exe	99
PID 2680 wrote to memory of 3776	2680	muestra1.bin.exe	101
PID 2680 wrote to memory of 3776	2680	muestra1.bin.exe	101
PID 2680 wrote to memory of 3776	2680	muestra1.bin.exe	101
PID 2680 wrote to memory of 3868	2680	muestra1.bin.exe	102
PID 2680 wrote to memory of 3868	2680	muestra1.bin.exe	102
PID 2680 wrote to memory of 3868	2680	muestra1.bin.exe	102
PID 2680 wrote to memory of 2288	2680	muestra1.bin.exe	103
PID 2680 wrote to memory of 2288	2680	muestra1.bin.exe	103
PID 2680 wrote to memory of 2288	2680	muestra1.bin.exe	103
PID 2680 wrote to memory of 3064	2680	muestra1.bin.exe	105
PID 2680 wrote to memory of 3064	2680	muestra1.bin.exe	105
PID 2680 wrote to memory of 3064	2680	muestra1.bin.exe	105
PID 3064 wrote to memory of 2332	3064	cmd.exe	106
PID 3064 wrote to memory of 2332	3064	cmd.exe	106
PID 3064 wrote to memory of 2332	3064	cmd.exe	106
PID 2680 wrote to memory of 1492	2680	muestra1.bin.exe	107
PID 2680 wrote to memory of 1492	2680	muestra1.bin.exe	107
PID 2680 wrote to memory of 1492	2680	muestra1.bin.exe	107
PID 2680 wrote to memory of 1260	2680	muestra1.bin.exe	108
PID 2680 wrote to memory of 1260	2680	muestra1.bin.exe	108
PID 2680 wrote to memory of 1260	2680	muestra1.bin.exe	108
PID 2680 wrote to memory of 2368	2680	muestra1.bin.exe	109
PID 2680 wrote to memory of 2368	2680	muestra1.bin.exe	109
PID 2680 wrote to memory of 2368	2680	muestra1.bin.exe	109
PID 2680 wrote to memory of 3888	2680	muestra1.bin.exe	111
PID 2680 wrote to memory of 3888	2680	muestra1.bin.exe	111
PID 2680 wrote to memory of 3888	2680	muestra1.bin.exe	111
PID 2680 wrote to memory of 2228	2680	muestra1.bin.exe	112

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
576	attrib.exe

C:\Users\Admin\AppData\Local\Temp\muestra1.bin.exe
"C:\Users\Admin\AppData\Local\Temp\muestra1.bin.exe"
1⤵
- Modifies extensions of user files
- Drops startup file
- Sets desktop wallpaper using registry
- Suspicious use of WriteProcessMemory
PID:2680
- C:\Windows\SysWOW64\attrib.exe
  attrib +h .
  2⤵
  - Views/modifies file attributes
  PID:576
- C:\Windows\SysWOW64\icacls.exe
  icacls . /grant Everyone:F /T /C /Q
  2⤵
  - Modifies file permissions
  PID:816
- C:\Users\Admin\AppData\Local\Temp\taskdl.exe
  taskdl.exe
  2⤵
  - Executes dropped EXE
  PID:1072
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c 112611623423013.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:748
- - C:\Windows\SysWOW64\cscript.exe
    cscript.exe //nologo m.vbs
    3⤵
    PID:972
- C:\Users\Admin\AppData\Local\Temp\@[email protected]
  @[email protected] co
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2832
- - 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:2736
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c start /b @[email protected] vs
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2876
- - C:\Users\Admin\AppData\Local\Temp\@[email protected]
    @[email protected] vs
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2344
  - - 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:2368
    - - C:\Windows\SysWOW64\vssadmin.exe
        
        vssadmin delete shadows /all /quiet
        5⤵
        Interacts with shadow copies
        
        PID:500
    - - C:\Windows\SysWOW64\Wbem\WMIC.exe
        
        wmic shadowcopy delete
        5⤵
        Suspicious use of AdjustPrivilegeToken
        
        PID:2836
- C:\Users\Admin\AppData\Local\Temp\taskdl.exe
  taskdl.exe
  2⤵
  - Executes dropped EXE
  PID:3776
- 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:3868
- C:\Users\Admin\AppData\Local\Temp\@[email protected]
  @[email protected]
  2⤵
  - Executes dropped EXE
  - Sets desktop wallpaper using registry
  - Suspicious use of SetWindowsHookEx
  PID:2288
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v "dfevzalm316" /t REG_SZ /d "\"C:\Users\Admin\AppData\Local\Temp\tasksche.exe\"" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3064
- - C:\Windows\SysWOW64\reg.exe
    reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v "dfevzalm316" /t REG_SZ /d "\"C:\Users\Admin\AppData\Local\Temp\tasksche.exe\"" /f
    3⤵
    - Adds Run key to start application
    - Modifies registry key
    PID:2332
- C:\Users\Admin\AppData\Local\Temp\taskdl.exe
  taskdl.exe
  2⤵
  - Executes dropped EXE
  PID:1492
- 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:1260
- C:\Users\Admin\AppData\Local\Temp\@[email protected]
  @[email protected]
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:2368
- C:\Users\Admin\AppData\Local\Temp\taskdl.exe
  taskdl.exe
  2⤵
  - Executes dropped EXE
  PID:3888
- 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:2228
- C:\Users\Admin\AppData\Local\Temp\@[email protected]
  @[email protected]
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:2256
- 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:3928
- C:\Users\Admin\AppData\Local\Temp\@[email protected]
  @[email protected]
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:3224
- C:\Users\Admin\AppData\Local\Temp\taskdl.exe
  taskdl.exe
  2⤵
  - Executes dropped EXE
  PID:3868

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2148

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/2680-116-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/2736-193-0x0000000000960000-0x0000000000C5E000-memory.dmp

Filesize
3.0MB

Download
memory/2736-189-0x00000000730C0000-0x0000000073142000-memory.dmp

Filesize
520KB

Download
memory/2736-191-0x0000000072E70000-0x0000000072E92000-memory.dmp

Filesize
136KB

Download
memory/2736-192-0x0000000072E70000-0x0000000072E92000-memory.dmp

Filesize
136KB

Download
memory/2736-188-0x0000000072EA0000-0x00000000730BC000-memory.dmp

Filesize
2.1MB

Download
memory/2736-190-0x00000000730C0000-0x0000000073142000-memory.dmp

Filesize
520KB

Download
memory/2736-194-0x0000000000960000-0x0000000000C5E000-memory.dmp

Filesize
3.0MB

Download
memory/2736-187-0x00000000731F0000-0x0000000073272000-memory.dmp

Filesize
520KB

Download
memory/2736-185-0x00000000731F0000-0x0000000073272000-memory.dmp

Filesize
520KB

Download
memory/2736-186-0x0000000072EA0000-0x00000000730BC000-memory.dmp

Filesize
2.1MB

Download