a75d09dbc668b1081175137338050b745860143bc87875e48d200f06606ebe6c

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
30-04-2024 05:38

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General

Target

2024-04-30_dae40904d62d344264f1a309396c0d9b_cryptolocker.exe
Size

90KB
MD5

dae40904d62d344264f1a309396c0d9b
SHA1

538af07acd2b1256efb33948e004d41ccaee7cd9
SHA256

a75d09dbc668b1081175137338050b745860143bc87875e48d200f06606ebe6c
SHA512

3c8c1168471725fbaa7e8c3984f4e0bc0117e134040fa410f5f9fb6e47792e24cbd0ed93b293e07d3e41a0a64d6276174dcf5aad228a4e13ac6c3945fa020ee0
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgdd0:AnBdOOtEvwDpj6zQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4164-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b4d-13.dat	CryptoLocker_rule2
behavioral2/memory/4164-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3888-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3888-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4164-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023b4d-13.dat	CryptoLocker_set1
behavioral2/memory/4164-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3888-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3888-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4164-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000c000000023b4d-13.dat	UPX
behavioral2/memory/4164-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3888-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3888-27-0x0000000000500000-0x000000000050F000-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-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	2024-04-30_dae40904d62d344264f1a309396c0d9b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3888	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4164-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000c000000023b4d-13.dat	upx
behavioral2/memory/4164-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3888-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3888-27-0x0000000000500000-0x000000000050F000-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 4164 wrote to memory of 3888	4164	2024-04-30_dae40904d62d344264f1a309396c0d9b_cryptolocker.exe	83
PID 4164 wrote to memory of 3888	4164	2024-04-30_dae40904d62d344264f1a309396c0d9b_cryptolocker.exe	83
PID 4164 wrote to memory of 3888	4164	2024-04-30_dae40904d62d344264f1a309396c0d9b_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-04-30_dae40904d62d344264f1a309396c0d9b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_dae40904d62d344264f1a309396c0d9b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4164
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3888

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
90KB

MD5
4134ad4d6d5d5bc769ca24901b7bc548

SHA1
4602c57891f9bff90f5af4a9438803e6820f002d

SHA256
cebe77b3c20273ed43da16ac69123113ac3d948878c3b7afdc3461c6bc45466a

SHA512
b70b57d67ea23c630f9a4de3f0521740bd43fdfe82ccf7d23e6bfb90fdb688177a85f8b8db575b47680878ba1a1635d734ccd2a27f9578df618fa72e917680de

Download Submit
memory/3888-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3888-26-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/3888-20-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3888-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4164-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4164-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4164-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4164-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4164-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download