5a753a4104973be3a0f7e1b285d7497a0e4bcf5fa0c019834e416d1342ab6093

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 02:34

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General

Target

2024-05-22_52fe52829fe63c2eff11f64bf63c40ad_cryptolocker.exe
Size

59KB
MD5

52fe52829fe63c2eff11f64bf63c40ad
SHA1

b2bc6d01565299af92922a5390477b48099f4d9d
SHA256

5a753a4104973be3a0f7e1b285d7497a0e4bcf5fa0c019834e416d1342ab6093
SHA512

f162cee1e2066c879cdf86d62297eec1e671cd42f90b23ddbd936e1878918ab3ced10d7e878b37201f76a7cf3e061d2f6d53ba90c8f6196f7b8d9194ccf26ec1
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAP6pb:H6QFElP6n+gou9cvMOtEvwDpjCpVXl

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4084-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4084-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3232-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3232-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4084-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4084-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3232-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3232-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4084-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4084-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3232-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3232-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_52fe52829fe63c2eff11f64bf63c40ad_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	2024-05-22_52fe52829fe63c2eff11f64bf63c40ad_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3232 asih.exe

pid	process
3232	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4084-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4084-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3232-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3232-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_52fe52829fe63c2eff11f64bf63c40ad_cryptolocker.exe

description	pid	process	target process
PID 4084 wrote to memory of 3232	4084	2024-05-22_52fe52829fe63c2eff11f64bf63c40ad_cryptolocker.exe	asih.exe
PID 4084 wrote to memory of 3232	4084	2024-05-22_52fe52829fe63c2eff11f64bf63c40ad_cryptolocker.exe	asih.exe
PID 4084 wrote to memory of 3232	4084	2024-05-22_52fe52829fe63c2eff11f64bf63c40ad_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_52fe52829fe63c2eff11f64bf63c40ad_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_52fe52829fe63c2eff11f64bf63c40ad_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4084

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3232

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
60KB

MD5
f8ee0ddc8216e3b259df4e3189f7bc9e

SHA1
e11399a693a22a3e9cf469a0cb431ec52c5b50da

SHA256
2dc6fd0c8e12396a74842e5f1254aa0b9a96121e7c4e15fec2b32a8d37ecc8ec

SHA512
cc89721758bbfcf845247c0ef0de7312567f035443e9e664464c6ba0c03920f991158c2362955b1b9ea26f48384ee877842b60ffbf64fe85b376fcc0974e18dc

Download Submit
memory/3232-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3232-20-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/3232-26-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/3232-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4084-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4084-1-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/4084-2-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/4084-9-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/4084-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download