wannacry | 7dff4036c0f6b9c18d53d8d64a42a9bbee68cf8d2a88a79005759ea5b0b9f2d7

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29-08-2024 14:14

240829-rj9j6sxgjq 10

29-08-2024 14:14

240829-rj1bhaxfrn 10

29-08-2024 14:02

240829-rb9j7svgkg 10

Analysis

max time kernel
1800s
max time network
1801s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
29-08-2024 14:14

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General

Target

c8f70ac7e9954b061f38978bac453fdc_JaffaCakes118.dll
Size

5.0MB
MD5

c8f70ac7e9954b061f38978bac453fdc
SHA1

608a4b167b7a4f5812decb0330959b2e4a825afb
SHA256

7dff4036c0f6b9c18d53d8d64a42a9bbee68cf8d2a88a79005759ea5b0b9f2d7
SHA512

e3fd00eb7db991eec1bcf6364520a34dd480059d9103bb7af78ab881b3adefb7ab1fc8f305a65e9ecc79df5a74ba31b46cc204d3f05df3e31160f0fbaec4587e
SSDEEP

98304:TDqPoBhz1aRxcSUDk36SAEdhvxWa9P593eAVp2H:TDqPe1Cxcxk3ZAEUadzec4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (36320) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
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

Executes dropped EXE 3 IoCs

pid	Process
4256	mssecsvc.exe
1676	mssecsvc.exe
1204	tasksche.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 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 6 IoCs

description	pid	Process	procid_target
PID 1772 wrote to memory of 1944	1772	rundll32.exe	93
PID 1772 wrote to memory of 1944	1772	rundll32.exe	93
PID 1772 wrote to memory of 1944	1772	rundll32.exe	93
PID 1944 wrote to memory of 4256	1944	rundll32.exe	94
PID 1944 wrote to memory of 4256	1944	rundll32.exe	94
PID 1944 wrote to memory of 4256	1944	rundll32.exe	94

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c8f70ac7e9954b061f38978bac453fdc_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1772
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c8f70ac7e9954b061f38978bac453fdc_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1944
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4256
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1204

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:1676

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=4460,i,10597648459838880772,16562651767759956329,262144 --variations-seed-version --mojo-platform-channel-handle=4344 /prefetch:8
1⤵
PID:948

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=4076,i,10597648459838880772,16562651767759956329,262144 --variations-seed-version --mojo-platform-channel-handle=4068 /prefetch:8
1⤵
PID:4300

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
873db523cf1a5c46201f70fa8d06477c

SHA1
27275b9858ecf9dcf7237a5f759b6c063d84d8c0

SHA256
46a7188e237cc7e06842567b30a21336f88140c8f6259d8b9bb0482644335932

SHA512
a17026a78f8d3390fa3b4dac2280ed27c3e504f9260da263c63aeaee8e60a9ed9f0b917e62a17ace38df828bd981c1f0f71582f0e85a2fef73bc7285505544fe

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
d7a781aa1f9da5d30708526320eba21b

SHA1
951a80a582b3a13286643bc8228dc3e2506a9b92

SHA256
d8cdfa66dfe433268ce31463dc1736ea21bbae75f21c0daf07febe16618d304a

SHA512
afa75828bcdf96b6530ee6ae391b5900851d8d9e3929add2e252363bf923b39d127fb71ffa27f13f4ebece4aeff027a46b3777dae805caf94e73b02c73b9e711

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