6639d3dc2bffe9651043f784b97140b8d9925e482d6c69e9d958f94f86f3d7d7

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/04/2024, 03:25

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General

Target

2024-04-28_16b6b9c4372c26a30e4cf14027745021_cryptolocker.exe
Size

38KB
MD5

16b6b9c4372c26a30e4cf14027745021
SHA1

e750086b3c63a0c71e9facc9a4148341d8edcddc
SHA256

6639d3dc2bffe9651043f784b97140b8d9925e482d6c69e9d958f94f86f3d7d7
SHA512

1e74cdc0c48b7aa4676c501f1c4cf7e121cfcdb119f79b5d7fceca01a26d72460518300906dde2e903547a39f151cab58310c12c05872a931cb221c30ad9be63
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYabT:qDdFJy3QMOtEvwDpjjWMl7Td/

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4820-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002325a-13.dat	CryptoLocker_rule2
behavioral2/memory/4820-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4352-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4820-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002325a-13.dat	CryptoLocker_set1
behavioral2/memory/4820-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4352-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4820-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002325a-13.dat	UPX
behavioral2/memory/4820-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4352-27-0x0000000000500000-0x0000000000510000-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	2024-04-28_16b6b9c4372c26a30e4cf14027745021_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4352	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4820-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000800000002325a-13.dat	upx
behavioral2/memory/4820-26-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4352-27-0x0000000000500000-0x0000000000510000-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 4820 wrote to memory of 4352	4820	2024-04-28_16b6b9c4372c26a30e4cf14027745021_cryptolocker.exe	94
PID 4820 wrote to memory of 4352	4820	2024-04-28_16b6b9c4372c26a30e4cf14027745021_cryptolocker.exe	94
PID 4820 wrote to memory of 4352	4820	2024-04-28_16b6b9c4372c26a30e4cf14027745021_cryptolocker.exe	94

C:\Users\Admin\AppData\Local\Temp\2024-04-28_16b6b9c4372c26a30e4cf14027745021_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_16b6b9c4372c26a30e4cf14027745021_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4820
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4352

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=4056 --field-trial-handle=2328,i,5873823382323802923,13134441441264702821,262144 --variations-seed-version /prefetch:8
1⤵
PID:5100

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
889d63633efd897c42bb19bffac4b85d

SHA1
f34a8e252840395e57c570ca8f1460d797c1075c

SHA256
c07370584d4b757f691f123b5014e28c1f2dc3e89e7a616753cb23332c779b94

SHA512
68b5a85b075ad14562d5977b365e0b8cacb709cc2ab0f92054d46eae32e3e8cb7df2508d7c1b543ae7d5934bf1afd4c6b8414e15a52275d5a3df9c228bcef149

Download Submit
memory/4352-18-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4352-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4820-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4820-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4820-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4820-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4820-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download