wannacry | 222300534ae7c6e8390677ed8f46a5fdf0623e9cd1cec973ef36d3a33d618f6e

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
16-09-2024 16:27

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General

Target

e5283d7cad73eeb1085e3759669f7133_JaffaCakes118.dll
Size

5.0MB
MD5

e5283d7cad73eeb1085e3759669f7133
SHA1

e66ac36a28e118fcd4a317df4960e4c21c573f42
SHA256

222300534ae7c6e8390677ed8f46a5fdf0623e9cd1cec973ef36d3a33d618f6e
SHA512

c7f36a4379c78cf57ddc324422f121bd5e7164ce1e296368c09b07bfabcadca8bea4eb43e35d931c94b61ac128c6cdd1617b9c79ec363df1dbca64b6d8f84ebd
SSDEEP

98304:TDqPoBhz1aRxcSUDk36SAEdhvxWa9E93R8yAVp2H:TDqPe1Cxcxk3ZAEUaIR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3263) 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
1652	mssecsvc.exe
4512	mssecsvc.exe
4656	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\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 2088 wrote to memory of 816	2088	rundll32.exe	91
PID 2088 wrote to memory of 816	2088	rundll32.exe	91
PID 2088 wrote to memory of 816	2088	rundll32.exe	91
PID 816 wrote to memory of 1652	816	rundll32.exe	92
PID 816 wrote to memory of 1652	816	rundll32.exe	92
PID 816 wrote to memory of 1652	816	rundll32.exe	92

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e5283d7cad73eeb1085e3759669f7133_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2088
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e5283d7cad73eeb1085e3759669f7133_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:816
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1652
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4656

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:4512

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=4248,i,15436195446242760253,4000484513008731869,262144 --variations-seed-version --mojo-platform-channel-handle=1308 /prefetch:8
1⤵
PID:3532

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
2af2d969f584d38d43629d0b79f84091

SHA1
7e85ebd4b4eb232c4a308ff42df95dd1d95166bc

SHA256
e29626b985d6149f9ff0f1d4ac12c0313deeb91d313f0b5b576782da7ebc83d7

SHA512
bdc304abfabcbe21462b7be02e36e95eb79051a70261951baf2917f6d19d19f9f59680f6dc5f9b6a97b93643e2c361cd41d97255362a07372f719c25139eef59

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
f78a86fa8c5e78e6840fc0751a284d2e

SHA1
06140394d139c2db05e3e9f9fd5a67cc706c467a

SHA256
3fac4ebb902c5af67b6a6a67732b9c4fd9c6cd8f9fb6860c023da1a68a28ac02

SHA512
a63817d889c3ab74d0ef55018d22bfee9ef0365ff9f852becbda8dfb24320d45d68fd1733365a52ee031ad2b0de550bd68a8e3843ef1496de40ee36407601ae4

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