02f12cbef656b3826d0a9feeaf2a675bde061ce4857f1e3e956f33f7e07a12bf

Analysis

max time kernel
150s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
09-05-2024 20:24

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General

Target

2024-05-09_353392bf04bd1d9eb5ae2af9f4e260e7_cryptolocker.exe
Size

39KB
MD5

353392bf04bd1d9eb5ae2af9f4e260e7
SHA1

e4d8d26714c32c95a5bc9644b993e6cafb76f5e8
SHA256

02f12cbef656b3826d0a9feeaf2a675bde061ce4857f1e3e956f33f7e07a12bf
SHA512

6d156c1a5c4d157943eb462428bd455328bfc21440f061f16793f0a6e28027d0921fa7dd23e6ba2a52d9401d5039866f9fcc2440f7fc7fc80fe4b600c9fae9a7
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBI:qDdFJy3QMOtEvwDpjjWMl7Td6

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4068-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4068-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023244-14.dat	CryptoLocker_rule2
behavioral2/memory/3260-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4068-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4068-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023244-14.dat	CryptoLocker_set1
behavioral2/memory/3260-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4068-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4068-10-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023244-14.dat	UPX
behavioral2/memory/3260-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

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	2024-05-09_353392bf04bd1d9eb5ae2af9f4e260e7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3260	asih.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4068-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4068-10-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023244-14.dat	upx
behavioral2/memory/3260-27-0x0000000000500000-0x0000000000510000-memory.dmp	upx

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 4068 wrote to memory of 3260	4068	2024-05-09_353392bf04bd1d9eb5ae2af9f4e260e7_cryptolocker.exe	90
PID 4068 wrote to memory of 3260	4068	2024-05-09_353392bf04bd1d9eb5ae2af9f4e260e7_cryptolocker.exe	90
PID 4068 wrote to memory of 3260	4068	2024-05-09_353392bf04bd1d9eb5ae2af9f4e260e7_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-05-09_353392bf04bd1d9eb5ae2af9f4e260e7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-09_353392bf04bd1d9eb5ae2af9f4e260e7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4068
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3260

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=3916 --field-trial-handle=2244,i,11878111470816612087,2265290141962607370,262144 --variations-seed-version /prefetch:8
1⤵
PID:840

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
39KB

MD5
1189a53cba64bfce55a542e39d8ab722

SHA1
10ed3b03f696a8a7ccf2b939132ab70eda14dafe

SHA256
8482539ef26429495042cf6e16f23c7a6ed857eb2a42462fd7a95123fdf6ca52

SHA512
ba5cddf9b2756adb581f46fc0bda24d5774806a85ce22956692182133b5ee836bb41cffc4aafd2119b8b1c0957854b4165904a3d1a7cef8021d39ae094fb11cb

Download Submit
memory/3260-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3260-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3260-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4068-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4068-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/4068-2-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/4068-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4068-10-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download