wannacry | 1c2cb3a8cbcfd685562e382651218cc0f0b18589482402ae4d3c4a5ab266c39d

General

Target

e6855434ad2a02e8bc34813775695668_JaffaCakes118.dll
Size

5.0MB
MD5

e6855434ad2a02e8bc34813775695668
SHA1

ff68c8f1f3b9d8954f77d6884bcd29d4c7d48af1
SHA256

1c2cb3a8cbcfd685562e382651218cc0f0b18589482402ae4d3c4a5ab266c39d
SHA512

6057946841388660d82708aaac0fab22547d631b1a2c0dfd0aebf56ac07116ee583fe8dda31e45fa1e1069791cf3f42cc699639a47556b778bf546b8847545af
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2H:+DqPe1Cxcxk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3292) 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 5 IoCs

pid	Process
1388	mssecsvc.exe
1408	mssecsvc.exe
4324	tasksche.exe
3840	tasksche.exe
4408	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\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe

Program crash 3 IoCs

pid	pid_target	Process	procid_target
1348	3840	WerFault.exe	94
2960	4408	WerFault.exe	108
4168	4324	WerFault.exe	92

System Location Discovery: System Language Discovery 1 TTPs 6 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	tasksche.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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tasksche.exe

Modifies data under HKEY_USERS 5 IoCs

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

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 752 wrote to memory of 3308	752	rundll32.exe	89
PID 752 wrote to memory of 3308	752	rundll32.exe	89
PID 752 wrote to memory of 3308	752	rundll32.exe	89
PID 3308 wrote to memory of 1388	3308	rundll32.exe	90
PID 3308 wrote to memory of 1388	3308	rundll32.exe	90
PID 3308 wrote to memory of 1388	3308	rundll32.exe	90
PID 1388 wrote to memory of 4324	1388	mssecsvc.exe	92
PID 1388 wrote to memory of 4324	1388	mssecsvc.exe	92
PID 1388 wrote to memory of 4324	1388	mssecsvc.exe	92
PID 2036 wrote to memory of 3840	2036	cmd.exe	94
PID 2036 wrote to memory of 3840	2036	cmd.exe	94
PID 2036 wrote to memory of 3840	2036	cmd.exe	94
PID 4324 wrote to memory of 4408	4324	tasksche.exe	108
PID 4324 wrote to memory of 4408	4324	tasksche.exe	108
PID 4324 wrote to memory of 4408	4324	tasksche.exe	108

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e6855434ad2a02e8bc34813775695668_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:752
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e6855434ad2a02e8bc34813775695668_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3308
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1388
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:4324
    - - C:\ProgramData\rbeoqsjruepbaol925\tasksche.exe
        
        C:\ProgramData\rbeoqsjruepbaol925\tasksche.exe
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        
        PID:4408
      - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4408 -s 252
        6⤵
        Program crash
        
        PID:2960
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4324 -s 324
        5⤵
        Program crash
        
        PID:4168

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:1408

C:\Windows\system32\cmd.exe
cmd.exe /c "C:\ProgramData\rbeoqsjruepbaol925\tasksche.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2036
- C:\ProgramData\rbeoqsjruepbaol925\tasksche.exe
  C:\ProgramData\rbeoqsjruepbaol925\tasksche.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:3840
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3840 -s 252
    3⤵
    - Program crash
    PID:1348

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3840 -ip 3840
1⤵
PID:2872

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4228,i,10369132178352108590,11047993562598554317,262144 --variations-seed-version --mojo-platform-channel-handle=3740 /prefetch:8
1⤵
PID:4368

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 372 -p 4408 -ip 4408
1⤵
PID:2064

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4324 -ip 4324
1⤵
PID:628

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\mssecsvc.exe

Filesize
3.6MB

MD5
c223a0feb037ab17cc273a40856395b0

SHA1
d4f498435c23027ee324bc93494f871dfe8ad7a9

SHA256
47a0caff0fa7159652f377ab3ac01b70771aa45cbd3b1567f752194c38f4ee6c

SHA512
69ea8339e33c5c7706411da7e2d0c8d2b8cdd4516f72a05aa62ba9093014e3d7542345af9c00e9f36c53f674b1cc2a6546bdad2c303c1cb3aae795bbdba01be9

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
e56fca813e300a87483824b2924a9b45

SHA1
e2055d48fc7999dd8cc9f5b3e94ba12948d5a8e2

SHA256
bf9b9e4b3b71a9cc47af24acbd525dd76a7c956049029e714c3e31b21507c70b

SHA512
246a0868b687a0ed8c22b5cfcdf8a8b36d3e40100c8ddad65a491418192889ba9a77ed238ed3c921812a1654287b7de437f89a014070dbf3f5378c547cb45e10

Download Submit

Analysis

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