660e1162eb03dc6c89aa7e2958a8b99af8f9bd99ba402d7fd8d0a8b20f87a707

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08/03/2024, 03:32

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General

Target

2024-03-08_3ab83bde6989e5dbdad26b9cc684d8ee_cryptolocker.exe
Size

61KB
MD5

3ab83bde6989e5dbdad26b9cc684d8ee
SHA1

eaba23e48769aeba1fbd6e276a010a570e559442
SHA256

660e1162eb03dc6c89aa7e2958a8b99af8f9bd99ba402d7fd8d0a8b20f87a707
SHA512

9135ef0860cca10d2c4707c5098c4a3348e63f167ed5db89d8756896a25fe46647d7c52bf88e84d3938206791bf4bdd3b0fdd2ffa0cacd21397d20343245d0b1
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgts6j:BbdDmjr+OtEvwDpjM8+

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1256-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000001e59e-13.dat	CryptoLocker_rule2
behavioral2/memory/4648-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1256-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4648-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4648-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1256-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4648-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1256-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000001e59e-13.dat	UPX
behavioral2/memory/4648-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1256-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4648-27-0x0000000000500000-0x0000000000510000-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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	2024-03-08_3ab83bde6989e5dbdad26b9cc684d8ee_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4648	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 1256 wrote to memory of 4648	1256	2024-03-08_3ab83bde6989e5dbdad26b9cc684d8ee_cryptolocker.exe	90
PID 1256 wrote to memory of 4648	1256	2024-03-08_3ab83bde6989e5dbdad26b9cc684d8ee_cryptolocker.exe	90
PID 1256 wrote to memory of 4648	1256	2024-03-08_3ab83bde6989e5dbdad26b9cc684d8ee_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-08_3ab83bde6989e5dbdad26b9cc684d8ee_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-08_3ab83bde6989e5dbdad26b9cc684d8ee_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1256
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4648

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
be402e5b44a515d57a45c12b22a6261c

SHA1
2600a37cce1b54219c56a13808862ad73f3d5679

SHA256
7abeabf852be6ce23fe2f47e15d40b9e284f4ded7c27ff0d129caac588429147

SHA512
22077e4a1cdf59c9f674978531d0897536056ea15e9a3a981b22c8204545db87eaf93356d43963a39461b6e37fa08f98d0d4e3ee8a98a4914bc91f33d1fc86b3

Download Submit
memory/1256-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1256-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1256-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1256-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/1256-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4648-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4648-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4648-21-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4648-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download