5a2a031a31d9229603d8ec1b5591933c3eff79b126ab27f3411d8e3532fcb2d1

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19/04/2024, 16:52

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General

Target

2024-04-19_a847a5c5a23fd7f1f6ea71d746e9a4e5_cryptolocker.exe
Size

62KB
MD5

a847a5c5a23fd7f1f6ea71d746e9a4e5
SHA1

4d5aaa15499e000a25ca925283325a1e3402aceb
SHA256

5a2a031a31d9229603d8ec1b5591933c3eff79b126ab27f3411d8e3532fcb2d1
SHA512

d6e825165b95ab13fc78db649da65c6f44199677202e4966954df5efde1a4a11a177e5d0c5bb26445e53dbc9c4f37da9a10a2f5258404cdfa872fc103f2ab06b
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiu:BbdDmjr+OtEvwDpjM8z

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4812-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_rule2
behavioral2/memory/4812-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4020-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4020-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4812-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4020-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4020-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4812-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x001c00000001e97e-13.dat	UPX
behavioral2/memory/4812-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4020-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4020-27-0x0000000000500000-0x0000000000510000-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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	2024-04-19_a847a5c5a23fd7f1f6ea71d746e9a4e5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4020	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 4812 wrote to memory of 4020	4812	2024-04-19_a847a5c5a23fd7f1f6ea71d746e9a4e5_cryptolocker.exe	85
PID 4812 wrote to memory of 4020	4812	2024-04-19_a847a5c5a23fd7f1f6ea71d746e9a4e5_cryptolocker.exe	85
PID 4812 wrote to memory of 4020	4812	2024-04-19_a847a5c5a23fd7f1f6ea71d746e9a4e5_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-19_a847a5c5a23fd7f1f6ea71d746e9a4e5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-19_a847a5c5a23fd7f1f6ea71d746e9a4e5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4812
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4020

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
62KB

MD5
3a6893115b8e5464fefefa918d66b1f6

SHA1
06d3480a23b1a6eb4e592ccf939e4fd63edbfa62

SHA256
6b989c837408ecd0ab2dd971e50168c684cb5d305410ca426d9efa8e331dbf9c

SHA512
9e9ef775a7c863f6c4b7a8b965799ad4a361c99820a0ea6586d6c11d01c3d4e46024e1840c00e390f248cfa2796ec864194fd4ded98da0a79910b9cf333e1c3c

Download Submit
memory/4020-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4020-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4020-22-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4020-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4812-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4812-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4812-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4812-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4812-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download