3fec955cf2ce513d4f7f789b4a5edffb4207116ce0b7dff67627470bd7b9a5c8

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
30/05/2024, 21:16

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General

Target

2024-05-30_77f5cca9da87d72c50c8db8eebd53614_cryptolocker.exe
Size

47KB
MD5

77f5cca9da87d72c50c8db8eebd53614
SHA1

a85863ece983e90c8106635704496d14f7e50916
SHA256

3fec955cf2ce513d4f7f789b4a5edffb4207116ce0b7dff67627470bd7b9a5c8
SHA512

2209b97a2631e90bed607c841fb250d9f34a520e2741a93108caeecf26538e918cea61ad4ce300ca3e02376b7aedff94eb0133d32096d0c4ea065b0e6c9a3890
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoAVV:qmbhXDmjr5MOtEvwDpj5cDtKkQZQWV

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/924-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_rule2
behavioral2/memory/4480-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/924-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4480-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/924-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/924-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4480-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/924-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000022f51-13.dat	UPX
behavioral2/memory/4480-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/924-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4480-28-0x0000000000500000-0x0000000000510000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-30_77f5cca9da87d72c50c8db8eebd53614_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4480	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 924 wrote to memory of 4480	924	2024-05-30_77f5cca9da87d72c50c8db8eebd53614_cryptolocker.exe	82
PID 924 wrote to memory of 4480	924	2024-05-30_77f5cca9da87d72c50c8db8eebd53614_cryptolocker.exe	82
PID 924 wrote to memory of 4480	924	2024-05-30_77f5cca9da87d72c50c8db8eebd53614_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-30_77f5cca9da87d72c50c8db8eebd53614_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-30_77f5cca9da87d72c50c8db8eebd53614_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:924
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4480

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
48KB

MD5
21d9d6bdf9af0f7e70cc743ee81a039d

SHA1
0a9a9b7c7bbde48506940a4ba7cfe885c20c83c4

SHA256
3dc14b28e7cc55a5f5eb50ae7a66dcd651de2c32c2bebacc81ad54e8ae7b8095

SHA512
88db40760e69dda7114ff055460bff276867c1f1b7c43c6155a21716c44a7b914d149cac6b8efae0c3af4830feeea07e838fd765e7eca33b51c7d176c5d20b27

Download Submit
memory/924-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/924-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/924-9-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/924-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/924-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4480-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4480-21-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4480-27-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4480-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download