b4fbd65029a36862570eae57ab082015c57ec8cb955bb3e2f3add23ae3c94b93

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
26/01/2024, 13:43

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General

Target

2024-01-26_d28d9a746196306ee9d6609d631fbe30_cryptolocker.exe
Size

107KB
MD5

d28d9a746196306ee9d6609d631fbe30
SHA1

d4598c3f042aa71cbe8a755e5507721108c880a0
SHA256

b4fbd65029a36862570eae57ab082015c57ec8cb955bb3e2f3add23ae3c94b93
SHA512

ed72cb8c43641ed1f5fb929504f9754fe63e6cfd9ecfe55a66941cbb4c0be3521f0b77632e10029f15abc10e21f8ec1e134c4eb9620351bcf7f4d2d255c86303
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GksgES:1nK6a+qdOOtEvwDpjY

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4564-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231fe-13.dat	CryptoLocker_rule2
behavioral2/memory/4272-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4564-20-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4272-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4564-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000231fe-13.dat	CryptoLocker_set1
behavioral2/memory/4272-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4564-20-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4272-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4564-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x00070000000231fe-13.dat	UPX
behavioral2/memory/4272-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4564-20-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4272-27-0x0000000000500000-0x000000000050F311-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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	2024-01-26_d28d9a746196306ee9d6609d631fbe30_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4272	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4564-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x00070000000231fe-13.dat	upx
behavioral2/memory/4272-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4564-20-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4272-27-0x0000000000500000-0x000000000050F311-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 4564 wrote to memory of 4272	4564	2024-01-26_d28d9a746196306ee9d6609d631fbe30_cryptolocker.exe	88
PID 4564 wrote to memory of 4272	4564	2024-01-26_d28d9a746196306ee9d6609d631fbe30_cryptolocker.exe	88
PID 4564 wrote to memory of 4272	4564	2024-01-26_d28d9a746196306ee9d6609d631fbe30_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-01-26_d28d9a746196306ee9d6609d631fbe30_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-26_d28d9a746196306ee9d6609d631fbe30_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4564
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4272

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
107KB

MD5
501dd61c14eee7249a949fb5c2116275

SHA1
20736c27e774bfb589ccab7df53233b1edbbb36c

SHA256
766e1b47b4f5162e875a064e0b663e9b7b175732be51dd3cb7b41b3ca50f7080

SHA512
7e54a021d6e513fbd25ce28f9b88d809dabd859ef22bce44bffdba49483cdfc7bf1ddc88d9ae245b1916e482eb7b1b855f629c9e08b205ec002165dccf06e429

Download Submit
memory/4272-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4272-21-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/4272-19-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/4272-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4564-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4564-1-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4564-2-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4564-3-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/4564-20-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download