wannacry | b6bf5f773318037e9b2b0a7483f43355896cccbf1aabe6ffd53cb18cdbfb6168

General

Target

e0020ea03cbb99306ed0dc33b4906829_JaffaCakes118.dll
Size

5.0MB
MD5

e0020ea03cbb99306ed0dc33b4906829
SHA1

7530d9f8292c9d5fa4ed1afb231a774124492aaf
SHA256

b6bf5f773318037e9b2b0a7483f43355896cccbf1aabe6ffd53cb18cdbfb6168
SHA512

69ad1881a2e98746ddbecef74af210a1c786eac63c51091dddee15207f5cecb8596cbc92d016c9056b9ef2b93b5544050fe00e937945d5d014cd5a24300cc549
SSDEEP

98304:gzqPoBhz1aRxcSUdYdhvxWa9P593R8yAVp2H:gzqPe1CxccUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3078) 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
2496	mssecsvc.exe
2096	mssecsvc.exe
2772	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	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 21 IoCs

description	ioc	Process
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\Wpad\{D496DE85-8C5F-4B8D-8DCB-5F9AE7EB0DC3}\WpadDecisionTime = c048714d9106db01	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{D496DE85-8C5F-4B8D-8DCB-5F9AE7EB0DC3}\b2-a3-e3-73-7c-8b	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\b2-a3-e3-73-7c-8b\WpadDecision = "0"	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\Wpad\{D496DE85-8C5F-4B8D-8DCB-5F9AE7EB0DC3}	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	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0190000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{D496DE85-8C5F-4B8D-8DCB-5F9AE7EB0DC3}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{D496DE85-8C5F-4B8D-8DCB-5F9AE7EB0DC3}\WpadNetworkName = "Network 3"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\b2-a3-e3-73-7c-8b\WpadDecisionReason = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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\Wpad\{D496DE85-8C5F-4B8D-8DCB-5F9AE7EB0DC3}\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\b2-a3-e3-73-7c-8b	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\b2-a3-e3-73-7c-8b\WpadDecisionTime = c048714d9106db01	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1680 wrote to memory of 2112	1680	rundll32.exe	30
PID 1680 wrote to memory of 2112	1680	rundll32.exe	30
PID 1680 wrote to memory of 2112	1680	rundll32.exe	30
PID 1680 wrote to memory of 2112	1680	rundll32.exe	30
PID 1680 wrote to memory of 2112	1680	rundll32.exe	30
PID 1680 wrote to memory of 2112	1680	rundll32.exe	30
PID 1680 wrote to memory of 2112	1680	rundll32.exe	30
PID 2112 wrote to memory of 2496	2112	rundll32.exe	31
PID 2112 wrote to memory of 2496	2112	rundll32.exe	31
PID 2112 wrote to memory of 2496	2112	rundll32.exe	31
PID 2112 wrote to memory of 2496	2112	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e0020ea03cbb99306ed0dc33b4906829_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1680
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e0020ea03cbb99306ed0dc33b4906829_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2112
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2496
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2772

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:2096

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
5a15274fabb6bbbf505e66370dd84599

SHA1
0301510da02da1ac9b4eb70d458a09e59dd84299

SHA256
de4f6432fcadb8b0dad7967a4fffa2c44de162d6991033e5a5bd5e623a54750c

SHA512
8bf46bed5299d8e14e0c27162b01dc8013342b829f8478c9649d0b2ce77fcf4ff97b9f19526c7d542714bc0aca4015c9173aa32d90659dc57841ad33f929bd52

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
cd4442236ad799dde0c32f8af6a27175

SHA1
df97b6a4fd84181c94f22fa76da0b3e707931420

SHA256
4baf1c1fbdd3bc8ec6a867e407d309a704ca61bc472d8d39678a3c425968070f

SHA512
a84820a927541f8318c432b728b3b10e631e0b31049e2d1deded9137b51e0f32559dfaab1abd2714677a69d9f9ec8b594dc789f9df4f89ea0bc601dafbb66261

Download Submit

Analysis

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