wannacry | 133e1d4c87a3728c2888997025565651e654f5af74c5428f822c9c058ec3b35e

General

Target

a34d8bd7493c5f8c2bf381a0267de463.dll
Size

5.0MB
MD5

a34d8bd7493c5f8c2bf381a0267de463
SHA1

19326be1a905a053f95cef69a630d30cb298bd5b
SHA256

133e1d4c87a3728c2888997025565651e654f5af74c5428f822c9c058ec3b35e
SHA512

647452c6bb769e1a928aba3af6140a63f210f14c3208b68ef05b94580c368f5fb865885ee8ce37bf3ae508687f1b2ec5c99e3364d9416a80eb15c11739dcd789
SSDEEP

49152:RnpEKUacBVQej/1INRx+TSqTdX1HkQo6SAARdhOv:1pyfBhz1aRxcSUDk36SAEdhG

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Wannacry family
wannacry
Contacts a large (3214) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Executes dropped EXE 3 IoCs

pid	Process
2468	mssecsvr.exe
340	mssecsvr.exe
2704	tasksche.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\0CXEIPY9.txt	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\0CXEIPY9.txt	mssecsvr.exe
File created	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\OW62OOJU.txt	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\OW62OOJU.txt	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvr.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\WINDOWS\mssecsvr.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvr.exe
File created	C:\Windows\__tmp_rar_sfx_access_check_259432891	tasksche.exe
File created	C:\Windows\eee.exe	tasksche.exe

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tasksche.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvr.exe

Modifies data under HKEY_USERS 24 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00b3000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{7F09344F-F434-4334-A5FD-5B253E4512E2}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\7a-4c-78-35-66-25\WpadDecision = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{7F09344F-F434-4334-A5FD-5B253E4512E2}\WpadDecisionTime = 70f1212acd66db01	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{7F09344F-F434-4334-A5FD-5B253E4512E2}\WpadDecision = "0"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{7F09344F-F434-4334-A5FD-5B253E4512E2}\WpadNetworkName = "Network 3"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\7a-4c-78-35-66-25	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{7F09344F-F434-4334-A5FD-5B253E4512E2}\7a-4c-78-35-66-25	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\7a-4c-78-35-66-25\WpadDecisionTime = 70f1212acd66db01	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{7F09344F-F434-4334-A5FD-5B253E4512E2}	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\7a-4c-78-35-66-25\WpadDecisionReason = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvr.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2704	tasksche.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2680 wrote to memory of 1784	2680	rundll32.exe	30
PID 2680 wrote to memory of 1784	2680	rundll32.exe	30
PID 2680 wrote to memory of 1784	2680	rundll32.exe	30
PID 2680 wrote to memory of 1784	2680	rundll32.exe	30
PID 2680 wrote to memory of 1784	2680	rundll32.exe	30
PID 2680 wrote to memory of 1784	2680	rundll32.exe	30
PID 2680 wrote to memory of 1784	2680	rundll32.exe	30
PID 1784 wrote to memory of 2468	1784	rundll32.exe	31
PID 1784 wrote to memory of 2468	1784	rundll32.exe	31
PID 1784 wrote to memory of 2468	1784	rundll32.exe	31
PID 1784 wrote to memory of 2468	1784	rundll32.exe	31
PID 2468 wrote to memory of 2704	2468	mssecsvr.exe	33
PID 2468 wrote to memory of 2704	2468	mssecsvr.exe	33
PID 2468 wrote to memory of 2704	2468	mssecsvr.exe	33
PID 2468 wrote to memory of 2704	2468	mssecsvr.exe	33
PID 2468 wrote to memory of 2704	2468	mssecsvr.exe	33
PID 2468 wrote to memory of 2704	2468	mssecsvr.exe	33
PID 2468 wrote to memory of 2704	2468	mssecsvr.exe	33

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a34d8bd7493c5f8c2bf381a0267de463.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2680
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a34d8bd7493c5f8c2bf381a0267de463.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1784
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2468
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious behavior: GetForegroundWindowSpam
      PID:2704

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:340

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

2

T1046

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\WINDOWS\tasksche.exe

Filesize
2.0MB

MD5
cbb4be2403d2be4554aa9be6b49a7b62

SHA1
112d00c9fc32873f6186cca9484ce67b7d9004ec

SHA256
5677d02e02429ed7eef009420c5cde3b246f37e2489d73fed257d79bf11aa35a

SHA512
9a55b3968bb1996b251b8bce239adafe00d9f8b8d2e5cacc068a9638448cac4a7f952481cb9944a1f8ee68373927ea35cce6f8dfeeeb9f8cd4d8a90fe3b18112

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
ff830e078cb269b709c952bdf1f34d24

SHA1
da78ca7ae08aeee403a2d2fad36d6ef1f3caadf6

SHA256
b3ef46cd596b56a76182760e0d15053fc95fc95fadfaadac115c7ffaaead29c5

SHA512
2b6e9f5b862cb2959408c7806b3256c1ad994152e39979c97570ac3e6566154403c5d6d20e6f70bcad975afd72892985f203c0420d168f43dbe92c363ba2a54d

Download Submit

Analysis

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