9fcbf62a1923bf992fd4e0faba0e81945fa8bfd0ff30b060a10c46be9a69dfe0

Analysis

max time kernel
141s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
29/03/2024, 02:39

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General

Target

2024-03-29_2ab576b9b03cca762a9b8ccee2b29e9c_cryptolocker.exe
Size

70KB
MD5

2ab576b9b03cca762a9b8ccee2b29e9c
SHA1

410794f3d7d80ef85ca4843106b8ed1c7cbf37cf
SHA256

9fcbf62a1923bf992fd4e0faba0e81945fa8bfd0ff30b060a10c46be9a69dfe0
SHA512

24c2cd9a40d9d61ff52d5b17f686dad634953c612da40ae0bdc289cbe3d7917e7ac42a60461d099bbcd99ace3a4b0f9700d64125f4a0cb8c375a8d42a1b5a664
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKUNZO7:DW60sllyWOtEvwDpjwF85c

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/4940-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00030000000227e7-13.dat	CryptoLocker_rule2
behavioral2/memory/4940-25-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4940-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00030000000227e7-13.dat	CryptoLocker_set1
behavioral2/memory/4940-25-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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	2024-03-29_2ab576b9b03cca762a9b8ccee2b29e9c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4620	asih.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 4940 wrote to memory of 4620	4940	2024-03-29_2ab576b9b03cca762a9b8ccee2b29e9c_cryptolocker.exe	98
PID 4940 wrote to memory of 4620	4940	2024-03-29_2ab576b9b03cca762a9b8ccee2b29e9c_cryptolocker.exe	98
PID 4940 wrote to memory of 4620	4940	2024-03-29_2ab576b9b03cca762a9b8ccee2b29e9c_cryptolocker.exe	98

C:\Users\Admin\AppData\Local\Temp\2024-03-29_2ab576b9b03cca762a9b8ccee2b29e9c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-29_2ab576b9b03cca762a9b8ccee2b29e9c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4940
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4620

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=4004 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:8
1⤵
PID:2256

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\asih.exe

Filesize
71KB

MD5
5a845c4bf1e7efcc09a280d342a9db44

SHA1
42eb214080a52ea30c095dee7c215c1a5f1cf29e

SHA256
599291f1d8997a9f8758b4343dd21f91c30f04248a36efbb68658c5dcb66d165

SHA512
30f34723ad71c0cdcf0309c646de6682811d9fc2495c2eb6c058bde9af0ffaa99c52c5d7b0a12fd613a0035add7607112a886bffc1267bea5bc9f1580708ade4

Download Submit
memory/4620-18-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4620-19-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/4940-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4940-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4940-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4940-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4940-25-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download