f806b7a1d649a832551c2e78dfdd55b8ac5e5537e16435af6c46347ed619b397

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
01/05/2024, 04:10

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General

Target

2024-05-01_486331eb19e276959d7a919ec67fad69_cryptolocker.exe
Size

60KB
MD5

486331eb19e276959d7a919ec67fad69
SHA1

22e93d949c6899fd2c2e6d32e2ce53b84b2015d8
SHA256

f806b7a1d649a832551c2e78dfdd55b8ac5e5537e16435af6c46347ed619b397
SHA512

b3f8dcaa763a862f91687e103851656c19b597212989fd253238f2dce68c7b8b97b3970a621239ff5e6312c98ff174453dd59df4d2677fa68f3d8d019045bde3
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5appq:z6QFElP6n+gKmddpMOtEvwDpj9aYa6

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3920-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023b1e-13.dat	CryptoLocker_rule2
behavioral2/memory/3920-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1016-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3920-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000d000000023b1e-13.dat	CryptoLocker_set1
behavioral2/memory/3920-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1016-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3920-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000d000000023b1e-13.dat	UPX
behavioral2/memory/3920-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1016-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	2024-05-01_486331eb19e276959d7a919ec67fad69_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1016	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3920-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000d000000023b1e-13.dat	upx
behavioral2/memory/3920-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1016-26-0x0000000000500000-0x0000000000510000-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 3920 wrote to memory of 1016	3920	2024-05-01_486331eb19e276959d7a919ec67fad69_cryptolocker.exe	84
PID 3920 wrote to memory of 1016	3920	2024-05-01_486331eb19e276959d7a919ec67fad69_cryptolocker.exe	84
PID 3920 wrote to memory of 1016	3920	2024-05-01_486331eb19e276959d7a919ec67fad69_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-01_486331eb19e276959d7a919ec67fad69_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-01_486331eb19e276959d7a919ec67fad69_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3920
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1016

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
60KB

MD5
8a136acfe072e8ee0c92286f9f762c64

SHA1
e88262858b970e7d09cfbeed16182cf319636339

SHA256
ecbed3c7c945fa1eac5ab0e747fb47c4b36497781865df854cd65a2262ba8afe

SHA512
47254c4dfd9ffb1134d5e9c3c14a84155d61147f551e569acff0bd63d1b0e1a50dcc725823348cecd28fffb0838fa2504909ab3052ba9b2539b0f380fef9393d

Download Submit
memory/1016-19-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/1016-25-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/1016-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3920-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3920-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3920-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3920-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3920-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download