wannacry | 84855a4c23222f861135a3b0be879a573cb91ec7827a7fa6d119f38c43b3730b

General

Target

fecedeedc700847c52753f372c6b6357_JaffaCakes118.dll
Size

5.0MB
MD5

fecedeedc700847c52753f372c6b6357
SHA1

23d16ed7723dcdc9a858bcb5171c9793150b5c03
SHA256

84855a4c23222f861135a3b0be879a573cb91ec7827a7fa6d119f38c43b3730b
SHA512

b2caf9e615aecba44c684d6207048e251e8c78da8243c06942a183418da57351d2b7c643ba2fedabbf941dadbf5cdf8696f72cf5cd93f77719b44efa771389e1
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA:+DqPoBhz1aRxcSUDk36SA

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3272) 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
2824	mssecsvc.exe
2912	mssecsvc.exe
2880	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 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvc.exe

Drops file in Windows directory 2 IoCs

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

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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe

Modifies data under HKEY_USERS 24 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{FDB7842C-ACF5-46F2-AAEA-B7EC40169877}\WpadDecisionTime = f078839b8312db01	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\f6-b6-bc-7b-95-ca	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{FDB7842C-ACF5-46F2-AAEA-B7EC40169877}\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00ba000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{FDB7842C-ACF5-46F2-AAEA-B7EC40169877}	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{FDB7842C-ACF5-46F2-AAEA-B7EC40169877}\f6-b6-bc-7b-95-ca	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\f6-b6-bc-7b-95-ca\WpadDecisionTime = f078839b8312db01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\f6-b6-bc-7b-95-ca\WpadDecision = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{FDB7842C-ACF5-46F2-AAEA-B7EC40169877}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{FDB7842C-ACF5-46F2-AAEA-B7EC40169877}\WpadNetworkName = "Network 3"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\f6-b6-bc-7b-95-ca\WpadDecisionReason = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2720 wrote to memory of 2924	2720	rundll32.exe	29
PID 2720 wrote to memory of 2924	2720	rundll32.exe	29
PID 2720 wrote to memory of 2924	2720	rundll32.exe	29
PID 2720 wrote to memory of 2924	2720	rundll32.exe	29
PID 2720 wrote to memory of 2924	2720	rundll32.exe	29
PID 2720 wrote to memory of 2924	2720	rundll32.exe	29
PID 2720 wrote to memory of 2924	2720	rundll32.exe	29
PID 2924 wrote to memory of 2824	2924	rundll32.exe	30
PID 2924 wrote to memory of 2824	2924	rundll32.exe	30
PID 2924 wrote to memory of 2824	2924	rundll32.exe	30
PID 2924 wrote to memory of 2824	2924	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\fecedeedc700847c52753f372c6b6357_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2720
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\fecedeedc700847c52753f372c6b6357_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2924
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2824
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2880

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:2912

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

Loading Replay Monitor...

Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
dc2b74dbafe163c2ed412eae6ec728e4

SHA1
47679695be93b5ab13ba2b55e20ae4b386941f60

SHA256
ec388367fe497f2bce224fd82835817342afe567852acd7e75d8e339b65b4ed6

SHA512
7cc2bfaa0663387dd06f74afea54c898d11b0cfa26ba2ca70c9864f23ce0df0683ddb8cada6d5802edb16fae7d586a26d544bacd2aab8622bce7936f235d022d

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
cc1d8f689465d8dc8b80caee4b87719f

SHA1
4c1f41519e74b06bd04e76d1e938656049a25a8c

SHA256
c3f41bb4eb5e136359c396296f2c44893107780fc269100ea9e9fbb5848d3d95

SHA512
e70ccd8776a65adeea90c682a44a185ad4b65f53d6cd9eb5646f1452754ffbf92f44408f725848e03e7eeb8295f7a6c884792422f0a66c0170dd8f8e1d6ec64d

Download Submit

Analysis

Sharing