699173b9ff42e259c3b5e2cc9c3b6e66944942f6deff29fe72d9d36bb182706c

Analysis

max time kernel
143s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
11/04/2024, 03:28

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General

Target

2024-04-11_25e2c9120978d4fbd3fc9dd618ddc72a_cryptolocker.exe
Size

60KB
MD5

25e2c9120978d4fbd3fc9dd618ddc72a
SHA1

30e963457e7383752824064cae83960201d2b6f7
SHA256

699173b9ff42e259c3b5e2cc9c3b6e66944942f6deff29fe72d9d36bb182706c
SHA512

c553a5b84dce8db03f351720ebdff4076939512cab3afd14c58d4890f346d714d5341941a9da1b3928c8cf2922749f3ad755ea09a787dcbb8cbdeda4d5308e91
SSDEEP

1536:V6QFElP6n+gMQMOtEvwDpjyaLccVCbt5S:V6a+pOtEvwDpjvL

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x001100000002324d-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x001100000002324d-12.dat	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	2024-04-11_25e2c9120978d4fbd3fc9dd618ddc72a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1920	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 4848 wrote to memory of 1920	4848	2024-04-11_25e2c9120978d4fbd3fc9dd618ddc72a_cryptolocker.exe	90
PID 4848 wrote to memory of 1920	4848	2024-04-11_25e2c9120978d4fbd3fc9dd618ddc72a_cryptolocker.exe	90
PID 4848 wrote to memory of 1920	4848	2024-04-11_25e2c9120978d4fbd3fc9dd618ddc72a_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-04-11_25e2c9120978d4fbd3fc9dd618ddc72a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-11_25e2c9120978d4fbd3fc9dd618ddc72a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4848
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1920

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=1316 --field-trial-handle=2280,i,11703952675008463361,17436195144517971517,262144 --variations-seed-version /prefetch:8
1⤵
PID:3936

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
60KB

MD5
5200d2ae2dffd272f9d4cb179a024c70

SHA1
08ed025a032a7c9a8b6b11d8b10dce68d55eeee5

SHA256
d73d11a1d22a076573479b2c0818f66d28302577f91c27c5c7d06c9244cee910

SHA512
cfd5d092e977831fce5b930d2a9b881e1f5d140df55b491c824480694e9c25c080ae4f790a2c1a90f26f2b2875a690445488a40bdfcc2a937f6f404cbef3a5be

Download Submit
memory/1920-17-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1920-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4848-0-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4848-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4848-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download