wannacry | 8308d68effb72e3f1aa82573e70db3cbc6368641611e7b7f5900fb4509c8ba37

General

Target
8308d68effb72e3f1aa82573e70db3cbc6368641611e7b7f5900fb4509c8ba37.dll
Size 5.0MB
Sample260427-3ebccsev4m
SHA256 8308d68effb72e3f1aa82573e70db3cbc6368641611e7b7f5900fb4509c8ba37
MD5 f840bc1a69e7957631780e3282ea29f1
SHA1 ab13111ebf0a455d7fc39a3a4006dfab70d6b838
SHA512 7fd9728a2974234c83046e4975de27ea119efb78393249685ef6377ec8d473e381bd1a019031bc37aafe5d772a79dc3d162cecf5875a31da8818c84c683400d2
SSDEEP 49152:RnlMSPbcBVQej/1IN4+TSqTdX1HkQo6SAARdhnv:1lPoBhz1a4cSUDk36SAEdhv
TLSH
T19D36339971BC91FCD10519B480BB8A27B2B23C6E26FE5E0F9F4049661D43F5AF790B42
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery wannacry ransomware worm

Malware Config

Signatures

Family: Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3614) 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
4524	mssecsvr.exe
968	mssecsvr.exe
4172	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 Windows directory 2 IoCs

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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4768	4172	WerFault.exe	84

System Location Discovery: System Language Discovery 1 TTPs 3 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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvr.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
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\ProxyBypass = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvr.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 656 wrote to memory of 4128	656	rundll32.exe	80
PID 4128 wrote to memory of 4524	4128	rundll32.exe	81
PID 4524 wrote to memory of 4172	4524	mssecsvr.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8308d68effb72e3f1aa82573e70db3cbc6368641611e7b7f5900fb4509c8ba37.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:656
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\8308d68effb72e3f1aa82573e70db3cbc6368641611e7b7f5900fb4509c8ba37.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4128
- - 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:4524
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4172
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4172 -s 8
        5⤵
        Program crash
        
        PID:4768

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:968

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4172 -ip 4172
1⤵
PID:420

Network

MITRE ATT&CK Enterprise v16

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

mssecsvr.exe

Path C:\Windows\mssecsvr.exe
Size 2.2MB
SHA256 6a8a11f61d5b8c51af6d5a54339a8bb0a69fa35f5ecbe106a3b71b839a4a2669
MD5 6566910acea69da6378053a2a34ee3e8
SHA1 074c82de081acba0a2ce4c4b2407d79895fee1e2
SHA512 922fefc850c83e9977f7730b3bdd0eb26a2e3a1390c2e8a2da07e0447986d664e8031b7ba5480c8b55c60bea56657db52eecf7b5a08452ee60595f655d033cc2
SSDEEP 49152:QnlMSPbcBVQej/1IN4+TSqTdX1HkQo6SAARdhnvn:QlPoBhz1a4cSUDk36SAEdhvn
TLSH
T116B5339971BC91FCD10519B480BB8A27B2B23C6E26FE5E0F9F4049661D43F5AF790B42
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

tasksche.exe

Path C:\Windows\tasksche.exe
Size 2.0MB
SHA256 0e72ef216f44c322c253e2d74a130a9b52f7f34ca466f06be9db2582226ae416
MD5 d7ec9da64c4220e98545cb7ab06d1a5e
SHA1 e296402310ac3fd18e68990133641da9916e81b6
SHA512 8bfd1b1e46e0ecc9e80f4f1c7ed7f89a472d358c8930cc5c2adb06fb7d0e3f461d60b3291d8088d63124a73e02773b2ee68e63dc3e0d95a3382b42cf20b5e38c
SSDEEP 49152:/MSPbcBVQej/1IN4+TSqTdX1HkQo6SAARdhnvm:/PoBhz1a4cSUDk36SAEdhvm
TLSH
T1E09533E9B171A7BCD7062DF840AFC56736A134BA69EF2E01DB80046A6C46F1FD7805D2
MD5 SHA1 SHA512 SSDEEP TLSH