wannacry | 7d8644271eb48be35e35f1d4c06649ba6878b4672f3d57bdea1f2ff9074bc434

General

Target

e9d1ba0ee54fcdf37cf458cd3209c9f3_JaffaCakes118.dll
Size

5.0MB
MD5

e9d1ba0ee54fcdf37cf458cd3209c9f3
SHA1

77970fdacd24e82e89547f0d6087f866126469ca
SHA256

7d8644271eb48be35e35f1d4c06649ba6878b4672f3d57bdea1f2ff9074bc434
SHA512

5dbc5b9afc7f15b5dc48650b136621aec4486f036f626fd91f786ee4375007f1a2501a954285c08763319f332657b1b883cd991ba0c678f39d4d19cbfbb3cc0c
SSDEEP

49152:RnpEKUacBVQej/1INRx+TSqTdX1HkQo6SAARdhnv:1pyfBhz1aRxcSUDk36SAEdhv

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3194) 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
3680	mssecsvr.exe
4576	mssecsvr.exe
2084	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 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	mssecsvr.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\__tmp_rar_sfx_access_check_240614265	tasksche.exe
File created	C:\Windows\eee.exe	tasksche.exe
File created	C:\WINDOWS\mssecsvr.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvr.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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tasksche.exe

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft	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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows	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\AutoDetect = "0"	mssecsvr.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2128 wrote to memory of 1576	2128	rundll32.exe	82
PID 2128 wrote to memory of 1576	2128	rundll32.exe	82
PID 2128 wrote to memory of 1576	2128	rundll32.exe	82
PID 1576 wrote to memory of 3680	1576	rundll32.exe	83
PID 1576 wrote to memory of 3680	1576	rundll32.exe	83
PID 1576 wrote to memory of 3680	1576	rundll32.exe	83
PID 3680 wrote to memory of 2084	3680	mssecsvr.exe	85
PID 3680 wrote to memory of 2084	3680	mssecsvr.exe	85
PID 3680 wrote to memory of 2084	3680	mssecsvr.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e9d1ba0ee54fcdf37cf458cd3209c9f3_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2128
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e9d1ba0ee54fcdf37cf458cd3209c9f3_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1576
- - 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:3680
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      PID:2084

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:4576

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\mssecsvr.exe

Filesize
2.2MB

MD5
142db3228dd9177f5fdaec26d0f0e19a

SHA1
f4f080d897a4fe16aa557a3499a7d495db62148b

SHA256
458d19c4e0d41353ade3b5eb94815436ac911ad13c2fa525f753d5ef182f417f

SHA512
07a24755cc8e53669065d3dcfaee9ff6670670242b4e7f5ddd82f75501923372a394063f3b6a9fcd27cf67eb84a152e3b7b7c7d0327d22e2591fb47dec9053cf

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C:\Windows\tasksche.exe

Filesize
2.0MB

MD5
beb8a27fc024962e045c32aa58d07d0e

SHA1
796d3613673f323135865c42272abef347add163

SHA256
ea2ad4d3bb98673b88e18eea1bf06c371c206b64246a9193b2a64ba4fe4f4900

SHA512
e84c03f6f4399b28e0d258b743831f36c621325d9b199cbbdd6982ed51280facfc5a953a2393788bbc54efb653f95c9f75ea29c93c147c9227aff3395f788179

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Analysis

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