cf1ed4a6ca27babaa84beaede34b7ae539e9d94c7545e5ed36a32c8756b4bd1e

Analysis

max time kernel
152s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
11-03-2024 12:33

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General

Target

2024-03-11_b8b8fe43e3ca21642515ccdc21e1e65c_cryptolocker.exe
Size

105KB
MD5

b8b8fe43e3ca21642515ccdc21e1e65c
SHA1

f86ac43cd61ae2d1a34f28457a595f51572f7938
SHA256

cf1ed4a6ca27babaa84beaede34b7ae539e9d94c7545e5ed36a32c8756b4bd1e
SHA512

9756e3799acc08ac80af0a5a2dc697fa6beb4087b00798020b9dd9fc16941ec6b4379c1bc9684d4147b772dbb25cf2f9d99c44ce13d06a116760a9015a760795
SSDEEP

1536:V6QFElP6n+gMQMOtEvwDpjQGYQbN/PKwNgpQbCJhE:V6a+pOtEvwDpjtzV

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0009000000023261-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x0009000000023261-12.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	2024-03-11_b8b8fe43e3ca21642515ccdc21e1e65c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3720	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 2484 wrote to memory of 3720	2484	2024-03-11_b8b8fe43e3ca21642515ccdc21e1e65c_cryptolocker.exe	98
PID 2484 wrote to memory of 3720	2484	2024-03-11_b8b8fe43e3ca21642515ccdc21e1e65c_cryptolocker.exe	98
PID 2484 wrote to memory of 3720	2484	2024-03-11_b8b8fe43e3ca21642515ccdc21e1e65c_cryptolocker.exe	98

C:\Users\Admin\AppData\Local\Temp\2024-03-11_b8b8fe43e3ca21642515ccdc21e1e65c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-11_b8b8fe43e3ca21642515ccdc21e1e65c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2484
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3720

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=2808 --field-trial-handle=2292,i,2103142837140538807,15881446839139365070,262144 --variations-seed-version /prefetch:8
1⤵
PID:404

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
106KB

MD5
8bf8b75c4445537b61d0a34a79fb625e

SHA1
4cce76bb42b055236437883dc3cafa7f271fc69a

SHA256
82f8fd147a316082a68a9d18fb9d1dd52001d7b2abb199f59aca8b1cadb008e5

SHA512
7ecc84ff4368e7862c1c91caf1f7e1023f3ba9ecc01bc4d93bf9323ad9dbeece27ff97c3453393d8991784ffa0dfc3d5c6a43fef07f1a139ab3eeb893315ad34

Download Submit
memory/2484-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2484-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2484-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3720-17-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3720-20-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download