wannacry | efc053c239eb634721b5f7fd805b1ac3a5c9f63dac8fe536e5b284285bb915b2

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
27-09-2024 11:31

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General

Target

fa535790a14062a7194ec07246b7cf34_JaffaCakes118.dll
Size

5.0MB
MD5

fa535790a14062a7194ec07246b7cf34
SHA1

22543e3201137fac7ed9c4d4850a397e17141ba5
SHA256

efc053c239eb634721b5f7fd805b1ac3a5c9f63dac8fe536e5b284285bb915b2
SHA512

d662909337be1078ca2b08199948cfce95ac11940fddf54e97e03a0ca063dda8c5fba6d74ac40d2769c2ca464f4cde0b40317f03833f5bce679f0cfaf020b490
SSDEEP

98304:d8qPoBiz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2H:d8qPp1Cxcxk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3159) 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
2540	mssecsvc.exe
1212	mssecsvc.exe
2136	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 1 IoCs

description	ioc	Process
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 2380 wrote to memory of 2068	2380	rundll32.exe	30
PID 2380 wrote to memory of 2068	2380	rundll32.exe	30
PID 2380 wrote to memory of 2068	2380	rundll32.exe	30
PID 2380 wrote to memory of 2068	2380	rundll32.exe	30
PID 2380 wrote to memory of 2068	2380	rundll32.exe	30
PID 2380 wrote to memory of 2068	2380	rundll32.exe	30
PID 2380 wrote to memory of 2068	2380	rundll32.exe	30
PID 2068 wrote to memory of 2540	2068	rundll32.exe	31
PID 2068 wrote to memory of 2540	2068	rundll32.exe	31
PID 2068 wrote to memory of 2540	2068	rundll32.exe	31
PID 2068 wrote to memory of 2540	2068	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\fa535790a14062a7194ec07246b7cf34_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\fa535790a14062a7194ec07246b7cf34_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2068
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2540
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2136

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:1212

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
aeaa6b127b01d63c77830db675880bdf

SHA1
943ef182101920ae895ab2230c16ee06ebf6ad1e

SHA256
3b9b358e0a3f057796fb36f511b1696fbad4482c86b716649cf185fb31d5a3b0

SHA512
edfef0d720ca52e7d02110615f40fa8e7885c6fdb0ce274cda968de4cbe98b1be2722a512110fc6d50495c88b2bc9f07640cc39646e05487669fe7fec5eed472

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
fde685bad4953169db113ac9a23b3311

SHA1
731956d4e7279fe8e32ac680ac777be9d08c1c96

SHA256
1716a55ee73e2bc5b95e28037f70387bc3c11d6a3cb181d9b3161d07f656d1d1

SHA512
1e116e6797fd07708c44e50d6c3c7ec8a98ba2042fba3a12e84d2046012e25979b37b4f3c92d0a784a289b1e279e95b085b75f4476124ddf330e58b55b635c52

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