3fd824d0be3088b39cf060b9fcf8864318ed3ac1da026f65a0c11f94f5591e67

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
15-05-2024 15:21

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General

Target

2024-05-15_25bb91962c15d887d9f386d17591143b_cryptolocker.exe
Size

42KB
MD5

25bb91962c15d887d9f386d17591143b
SHA1

68b018e07894376dda83bf34accc393cd919aa5a
SHA256

3fd824d0be3088b39cf060b9fcf8864318ed3ac1da026f65a0c11f94f5591e67
SHA512

e219b8b167977d36e5e025ed27a6c7d41fc493af33e65528d32701a646033a82c2492a4d7268b5c27771fc7b13ac34bc880df2c5e0fdf0cd6a3d9ac0a19214f8
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAqtB:bCDOw9aMDooc+vAqtB

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4620-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023552-13.dat	CryptoLocker_rule2
behavioral2/memory/4620-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2724-26-0x0000000008000000-0x000000000800A000-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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-15_25bb91962c15d887d9f386d17591143b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2724	lossy.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 4620 wrote to memory of 2724	4620	2024-05-15_25bb91962c15d887d9f386d17591143b_cryptolocker.exe	89
PID 4620 wrote to memory of 2724	4620	2024-05-15_25bb91962c15d887d9f386d17591143b_cryptolocker.exe	89
PID 4620 wrote to memory of 2724	4620	2024-05-15_25bb91962c15d887d9f386d17591143b_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-05-15_25bb91962c15d887d9f386d17591143b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-15_25bb91962c15d887d9f386d17591143b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4620
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2724

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 --field-trial-handle=4404,i,5047420736443372512,9747851268033796534,262144 --variations-seed-version --mojo-platform-channel-handle=4356 /prefetch:8
1⤵
PID:3736

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\lossy.exe

Filesize
42KB

MD5
503d811dca545c56b0dafebe512fd151

SHA1
2a4b08cd3502bc08ffa8b21291ce68b72d0fa6f1

SHA256
19eed9686969a8010c33ad3e839391819961d52b2eb1b40e81698577c1e63e16

SHA512
d6c48acd8475bafbbd5a6f51375978d14b873362e536331778ba4a4fa35b073e1886172ee7126d9f128481dac22c8d09eeb0d3db7bc484d9e4eff07719af464c

Download Submit
memory/2724-19-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/2724-25-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/2724-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4620-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4620-1-0x00000000020C0000-0x00000000020C6000-memory.dmp

Filesize
24KB

Download
memory/4620-9-0x00000000020C0000-0x00000000020C6000-memory.dmp

Filesize
24KB

Download
memory/4620-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4620-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download