4de7f3e991e9b1ebdeb48dfac8056d366ae0214caaed44ae4a1b175ae428378e

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
27/05/2024, 19:44

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General

Target

2024-05-27_b398cc6d62c4e88f2ac307ec57b0071b_cryptolocker.exe
Size

60KB
MD5

b398cc6d62c4e88f2ac307ec57b0071b
SHA1

44a9b395c020869a359d602e55a0c4befa940960
SHA256

4de7f3e991e9b1ebdeb48dfac8056d366ae0214caaed44ae4a1b175ae428378e
SHA512

6d09566a1d8259eaae875d71cfc6d3b2fd193e6555081bc4331bc6ac6ca4848cecc275b3b98fc0a291fde806f2491d96f921c83fcbe1ad6f9a1e461a4b380cec
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaQ8vO:z6a+CdOOtEvwDpjQ8

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4472-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c0000000233be-13.dat	CryptoLocker_rule2
behavioral2/memory/4472-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/916-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4472-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c0000000233be-13.dat	CryptoLocker_set1
behavioral2/memory/4472-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/916-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4472-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c0000000233be-13.dat	UPX
behavioral2/memory/4472-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/916-26-0x0000000000500000-0x0000000000510000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-27_b398cc6d62c4e88f2ac307ec57b0071b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
916	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4472-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000c0000000233be-13.dat	upx
behavioral2/memory/4472-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/916-26-0x0000000000500000-0x0000000000510000-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 4472 wrote to memory of 916	4472	2024-05-27_b398cc6d62c4e88f2ac307ec57b0071b_cryptolocker.exe	84
PID 4472 wrote to memory of 916	4472	2024-05-27_b398cc6d62c4e88f2ac307ec57b0071b_cryptolocker.exe	84
PID 4472 wrote to memory of 916	4472	2024-05-27_b398cc6d62c4e88f2ac307ec57b0071b_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-27_b398cc6d62c4e88f2ac307ec57b0071b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_b398cc6d62c4e88f2ac307ec57b0071b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4472
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:916

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
582d756dc22dca5a00819ff8bf7fdb35

SHA1
4838ad9b2d6d59beea701758ff387e687173c7f8

SHA256
836d42a187b2fa941c0a1cb4c72318b6c1e86afd9ce7439ed0e503b158bd1e6b

SHA512
94f0b9d818a80fd31948eee33790c758b38b40e1a0d8f6957c191963290e23e2b328280d23bff65fb2b93c34be60883eed378db4fb26e80b89484052fd8f4fac

Download Submit
memory/916-25-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/916-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4472-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4472-1-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/4472-2-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4472-9-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/4472-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download