wannacry | 69f8b23f36c5fa8f8f67d17af01709292e0c29bd49c3c018b2410d869aa7fd5e

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
22-09-2024 01:05

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General

Target

f0fa71254202486a4d3fbf5085a93be8_JaffaCakes118.dll
Size

5.0MB
MD5

f0fa71254202486a4d3fbf5085a93be8
SHA1

66607b832d867c09c86e001ccc99c560d3a2e817
SHA256

69f8b23f36c5fa8f8f67d17af01709292e0c29bd49c3c018b2410d869aa7fd5e
SHA512

fc42144a4b847225e9fb8559f325c49fbf92607c485a148163f8b1612dd2c16e8a1ad92c062d2d31861e3a9b953755d6cb45140203b102b79bdc3f404b244f37
SSDEEP

24576:SbLgddQhfdmMSirYbcMNgef0QeQjG/D8kIqRYoAdNLKz6626M+vbOSSqTPV:SnAQqMSPbcBVQej/1INRx+TSqTd

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3190) 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
4744	mssecsvc.exe
4604	mssecsvc.exe
1388	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 3968 wrote to memory of 3064	3968	rundll32.exe	89
PID 3968 wrote to memory of 3064	3968	rundll32.exe	89
PID 3968 wrote to memory of 3064	3968	rundll32.exe	89
PID 3064 wrote to memory of 4744	3064	rundll32.exe	90
PID 3064 wrote to memory of 4744	3064	rundll32.exe	90
PID 3064 wrote to memory of 4744	3064	rundll32.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f0fa71254202486a4d3fbf5085a93be8_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3968
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f0fa71254202486a4d3fbf5085a93be8_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3064
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4744
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1388

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:4604

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=3768,i,15336851255456239337,16379811035920490645,262144 --variations-seed-version --mojo-platform-channel-handle=4012 /prefetch:8
1⤵
PID:2880

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
227456eb9bea44c4c3db307bf8dd4b0d

SHA1
02a2db460828ffc5677ec6b1b9634b4601852cdb

SHA256
b583df88836c30588583d167fd72da896706ff725c07a1ee7243b33a04474e55

SHA512
038ae686871ddb835fb34afa49853dfb092b3845f7a47fe3f58b532118cab65bc38ad4f73595e119c7fa75bfa5d3bdcb4a59ebb13a06a66fdbdd7c1e9e1d97da

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
98cd60a861aec71fd3207002df70ca53

SHA1
b2b4b10a286cc7b482dbb39fad72dd7a8422a45a

SHA256
9e99c7816bdd4af43590c251536825d1aba3f2dfe165484fa65440364db0d8b7

SHA512
95b97f7f72502127583b86a14508a9968cf4d41e7a89473928ee5c1847ea8efd74cff261ef2ef06ae84293d36e2644eb579fa8f960a8fe3cfedf105268684e3e

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