a9b09d26d8c4ae40cf48b5f104fe3e58d0bb65f70943d0ba9b44b6dcdcf8b335

Analysis

max time kernel
151s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
31-05-2024 04:26

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General

Target

2024-05-31_1cbd69a6bf2e48eb60f2e217ace4efa7_cryptolocker.exe
Size

32KB
MD5

1cbd69a6bf2e48eb60f2e217ace4efa7
SHA1

8afe5abb43f9ed2fcc38f8e7a79d01de734b526d
SHA256

a9b09d26d8c4ae40cf48b5f104fe3e58d0bb65f70943d0ba9b44b6dcdcf8b335
SHA512

3bb37c3e56c3d078c613b55d2708db11e627860122937ab79b8d5c8f3b92183e7ef48e33eeafda0d2fa2a6f59a36768876254b40721d3f21daa699ac8921e594
SSDEEP

384:bG74uGLLQRcsdeQ72ngEr4K7YmE8j60nrlwfjDUGTG7X:bG74zYcgT/Ekd0ryfju

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/628-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023268-13.dat	CryptoLocker_rule2
behavioral2/memory/628-25-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3316-26-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-31_1cbd69a6bf2e48eb60f2e217ace4efa7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3316	hasfj.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 628 wrote to memory of 3316	628	2024-05-31_1cbd69a6bf2e48eb60f2e217ace4efa7_cryptolocker.exe	91
PID 628 wrote to memory of 3316	628	2024-05-31_1cbd69a6bf2e48eb60f2e217ace4efa7_cryptolocker.exe	91
PID 628 wrote to memory of 3316	628	2024-05-31_1cbd69a6bf2e48eb60f2e217ace4efa7_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-05-31_1cbd69a6bf2e48eb60f2e217ace4efa7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_1cbd69a6bf2e48eb60f2e217ace4efa7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:628
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:3316

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=4440 --field-trial-handle=2248,i,10247514684337323751,15511974759131734137,262144 --variations-seed-version /prefetch:8
1⤵
PID:4472

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\hasfj.exe

Filesize
32KB

MD5
6637ebc08beab190442d392bfc7f8ea0

SHA1
cbcd038ff983f6aabce8c6049199a7a23a0b8d80

SHA256
17c3f43a2787dd42c8fd75fa5f2eefe644869961f579078efb6fbd4ba1718405

SHA512
ad74a08ddfa0ec6f9b3354ee42969e7079edc8567001ad35cde4c3ea072a2642ba9c8dd10bdeeaf6d2c653b793ed469bc8c88489b5bcf4bf3d443319c5480a1e

Download Submit
memory/628-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/628-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/628-2-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/628-3-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/628-25-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3316-18-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download
memory/3316-19-0x0000000002380000-0x0000000002386000-memory.dmp

Filesize
24KB

Download
memory/3316-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download