wannacry | 5f77ec5a76d7aeedf0071714d72c6e012db30ac40b9f26793f5aae58b6267197

General

Target

5f77ec5a76d7aeedf0071714d72c6e012db30ac40b9f26793f5aae58b6267197.dll
Size

5.0MB
MD5

508a10e644641d0663201a34d1f34a3e
SHA1

938032b48266a294ac966a632bf39510112ee052
SHA256

5f77ec5a76d7aeedf0071714d72c6e012db30ac40b9f26793f5aae58b6267197
SHA512

c7bff89cca236eec09f8c736f8bed56c0b17314397053b610c29e274c97b660b725a847dd622f306c1ac3bf7d91b0baceb078664270ae7da522b9fde9dd6a24b
SSDEEP

98304:TDqPoBhz1aRxcSUDk36SAEa593R8yAVp2H:TDqPe1Cxcxk3ZAEazR8yc4H

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 (3235) 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
2000	mssecsvc.exe
2564	mssecsvc.exe
2092	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\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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\Wpad\{2A8EB253-935E-4A00-A6FC-377A73112556}\WpadDecisionTime = d0c25520c167db01	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2A8EB253-935E-4A00-A6FC-377A73112556}\4a-84-6f-90-cf-3b	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\4a-84-6f-90-cf-3b\WpadDecisionReason = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	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\4a-84-6f-90-cf-3b\WpadDecision = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2A8EB253-935E-4A00-A6FC-377A73112556}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2A8EB253-935E-4A00-A6FC-377A73112556}\WpadNetworkName = "Network 3"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\4a-84-6f-90-cf-3b\WpadDecisionTime = d0c25520c167db01	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
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 = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0162000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2A8EB253-935E-4A00-A6FC-377A73112556}	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\4a-84-6f-90-cf-3b	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\Connections	mssecsvc.exe
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\UNCAsIntranet = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2A8EB253-935E-4A00-A6FC-377A73112556}\WpadDecision = "0"	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2900 wrote to memory of 788	2900	rundll32.exe	28
PID 2900 wrote to memory of 788	2900	rundll32.exe	28
PID 2900 wrote to memory of 788	2900	rundll32.exe	28
PID 2900 wrote to memory of 788	2900	rundll32.exe	28
PID 2900 wrote to memory of 788	2900	rundll32.exe	28
PID 2900 wrote to memory of 788	2900	rundll32.exe	28
PID 2900 wrote to memory of 788	2900	rundll32.exe	28
PID 788 wrote to memory of 2000	788	rundll32.exe	29
PID 788 wrote to memory of 2000	788	rundll32.exe	29
PID 788 wrote to memory of 2000	788	rundll32.exe	29
PID 788 wrote to memory of 2000	788	rundll32.exe	29

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5f77ec5a76d7aeedf0071714d72c6e012db30ac40b9f26793f5aae58b6267197.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2900
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\5f77ec5a76d7aeedf0071714d72c6e012db30ac40b9f26793f5aae58b6267197.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:788
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2000
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2092

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:2564

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
1147ea38fa9c8262147edfca8d05c25b

SHA1
c269024fff089b2df3939b934ca8ee75cc40d6b7

SHA256
0a9ec2f6c2c9acf8b0d69e4478951ddfadfc2f7208a564ebfae9d28738c51e5f

SHA512
f26fc6d40d5976cf7163cca2255f1d56d623cdb58d4a6df40b112b210cd128624d0d5947723c15152c57e109ea5e5332ae2edb037a843c9d4b2882fa844f2086

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
8db30a1308d4b53a26a76b814813b8b4

SHA1
61791a7326af11ef6bbe3007dec1d43d172edd8b

SHA256
ced6e1ab61223c75546bc6c10abfdf75419a8092a7803789817052d48ddf0714

SHA512
1bbd5ccb904aeca6dc9eb42d6f75925175cbbc13ced43f6d4bf999fcefb56d033c5e27bfd13efb493e76ec50aa8b01e6cc07f53102f83411b32c6c29cf269750

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Analysis

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