1a00bfe50d425f99be76ca7a77893e8fee52045e3b749894966abf4c8ebb9b74

Analysis

max time kernel
142s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 20:55

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General

Target

2024-05-22_618ebbee494fab9613586aa05b2dec26_cryptolocker.exe
Size

36KB
MD5

618ebbee494fab9613586aa05b2dec26
SHA1

cc965d11d8b274a98649a760e57a16cefb9ed2f5
SHA256

1a00bfe50d425f99be76ca7a77893e8fee52045e3b749894966abf4c8ebb9b74
SHA512

5ab237224775fb742074076cd19ed47ef51b5c840e2c0a60b3d521ecdf7e3d7b2994bdd6a465b997b538f63728b6d836156312b1e0e13d6730a0ce6f6bdaf1f2
SSDEEP

384:btBYQg/WIEhUCSNyepEjYnDOAlzVol6U/zzo+tkq4l8tFFxE2B0qG1HF:btB9g/WItCSsAGjX7r3BTaF

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\gewos.exe	CryptoLocker_rule2

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

2024-05-22_618ebbee494fab9613586aa05b2dec26_cryptolocker.exegewos.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-22_618ebbee494fab9613586aa05b2dec26_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

Processes:

gewos.exe

pid process

4424 gewos.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4424	gewos.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_618ebbee494fab9613586aa05b2dec26_cryptolocker.exe

description	pid	process	target process
PID 2468 wrote to memory of 4424	2468	2024-05-22_618ebbee494fab9613586aa05b2dec26_cryptolocker.exe	gewos.exe
PID 2468 wrote to memory of 4424	2468	2024-05-22_618ebbee494fab9613586aa05b2dec26_cryptolocker.exe	gewos.exe
PID 2468 wrote to memory of 4424	2468	2024-05-22_618ebbee494fab9613586aa05b2dec26_cryptolocker.exe	gewos.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_618ebbee494fab9613586aa05b2dec26_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_618ebbee494fab9613586aa05b2dec26_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2468
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:4424

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 --no-appcompat-clear --mojo-platform-channel-handle=3900 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:8
1⤵
PID:4152

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\gewos.exe

Filesize
36KB

MD5
8b4c96329ef6bfc5d980426cbd48624c

SHA1
853b1c9b5de22f47ba75620f6bc4e2323bc88d89

SHA256
7f23e5dd0d6a2ada3822889d49224ac1f23a673e035119a07b4908eda3142739

SHA512
b19ba77fc282f09a80b6ef8705095d7127dbb69cc0c6e15e4676146a3982da373c98e8ecdaa3e670b7570fae65b7409788a213993583342c096dc5fb60582363

Download Submit
C:\Users\Admin\AppData\Local\Temp\gewosik.exe

Filesize
185B

MD5
0676889a80a41c53295a732179f3b81a

SHA1
8dc8df2b439c78bbb377a498f88e81e05b2d9ae4

SHA256
949d1e4b20dee2e1cd86c3e95fc0930542bb1268b17bac9d7c80dbc754050272

SHA512
f227e96f9f4ce058c1ac51a28bd9e03967b0196f494600983ee0a952e3222e9066d4c7774de3989627275360e82af2c0b21f77067236df616c58799c6474fdf4

Download Submit
memory/2468-0-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/2468-1-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/2468-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4424-24-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download