f9da154eae5bd7a7991a557e7cd730fd4383b8193bfa9e2adc0ddd80812f3ef8

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
27-05-2024 08:29

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General

Target

2024-05-27_e2a28da1530ae97d08207e04e6b5bb3f_cryptolocker.exe
Size

53KB
MD5

e2a28da1530ae97d08207e04e6b5bb3f
SHA1

a10ad7df3f3161a81af1620fc1c0a37162e7be4f
SHA256

f9da154eae5bd7a7991a557e7cd730fd4383b8193bfa9e2adc0ddd80812f3ef8
SHA512

97038b25c0281b873d6a352959a70fd2b5cff8e1b62295df0e61746275d99341da41f2aa750241b7a561971e33d18a2bd4eebff58dfc92572e5d39d177f7ae96
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOk/v:z6QFElP6n+gKmddpMOtEvwDpj31ik/v

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2700-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a0000000233c2-13.dat	CryptoLocker_rule2
behavioral2/memory/2700-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4848-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2700-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000a0000000233c2-13.dat	CryptoLocker_set1
behavioral2/memory/2700-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4848-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2700-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000a0000000233c2-13.dat	UPX
behavioral2/memory/2700-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4848-26-0x0000000000500000-0x0000000000510000-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-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	2024-05-27_e2a28da1530ae97d08207e04e6b5bb3f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4848	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2700-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000a0000000233c2-13.dat	upx
behavioral2/memory/2700-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4848-26-0x0000000000500000-0x0000000000510000-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 2700 wrote to memory of 4848	2700	2024-05-27_e2a28da1530ae97d08207e04e6b5bb3f_cryptolocker.exe	83
PID 2700 wrote to memory of 4848	2700	2024-05-27_e2a28da1530ae97d08207e04e6b5bb3f_cryptolocker.exe	83
PID 2700 wrote to memory of 4848	2700	2024-05-27_e2a28da1530ae97d08207e04e6b5bb3f_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-27_e2a28da1530ae97d08207e04e6b5bb3f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_e2a28da1530ae97d08207e04e6b5bb3f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2700
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4848

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
53KB

MD5
9e8d59eed8520ed7a2fb2d58a39fc184

SHA1
4904dfb8c67d1d5add957ae94d3286c5be1bcb77

SHA256
7617265cb29cd758736e7383f27634d632ab3d913b126fcd4afd6fbc21c84212

SHA512
0b05a75c169d90184ab06179d478bbbdda847310f31ff54333e7290b7ea1bdda096ccc4929bd0b316bd97f25aff544dec04f184171dfe45dd9cf4fe4b413ae32

Download Submit
memory/2700-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2700-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2700-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2700-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2700-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4848-19-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4848-25-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4848-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download