5737522f9e0641491b13e21409f8b292a9bf091dfd4a133a8de663789d539751

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 15:36

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General

Target

2024-05-21_58e14fa6a4bc5e1abc416863352b3109_cryptolocker.exe
Size

52KB
MD5

58e14fa6a4bc5e1abc416863352b3109
SHA1

8ede4fc8dab57627ebd6e3f31daea0e52cadbc19
SHA256

5737522f9e0641491b13e21409f8b292a9bf091dfd4a133a8de663789d539751
SHA512

189bbc80ec019003fe5abe8c9e63b2b5a982b7cd91fd7c7a4446b2ba85cdab86e9459165051b3d1d667eaad28e3e3b032c07fad874bbac69ae4bc46a5276c57c
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOeVf:z6QFElP6n+gKmddpMOtEvwDpj31iet

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4160-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3176-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4160-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3176-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4160-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3176-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4160-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3176-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4160-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3176-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4160-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3176-27-0x0000000000500000-0x0000000000510000-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:

2024-05-21_58e14fa6a4bc5e1abc416863352b3109_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-05-21_58e14fa6a4bc5e1abc416863352b3109_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3176 asih.exe

pid	process
3176	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4160-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/3176-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4160-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3176-27-0x0000000000500000-0x0000000000510000-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:

2024-05-21_58e14fa6a4bc5e1abc416863352b3109_cryptolocker.exe

description	pid	process	target process
PID 4160 wrote to memory of 3176	4160	2024-05-21_58e14fa6a4bc5e1abc416863352b3109_cryptolocker.exe	asih.exe
PID 4160 wrote to memory of 3176	4160	2024-05-21_58e14fa6a4bc5e1abc416863352b3109_cryptolocker.exe	asih.exe
PID 4160 wrote to memory of 3176	4160	2024-05-21_58e14fa6a4bc5e1abc416863352b3109_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_58e14fa6a4bc5e1abc416863352b3109_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_58e14fa6a4bc5e1abc416863352b3109_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4160

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3176

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
53KB

MD5
0769d98543e4a9625cfd38ec1c804dca

SHA1
81613f5f0ed8b032ea9cd1209d377cb8bcaea6d3

SHA256
e3a983fdba9da204f8352b0256fdfd68f9a380c768ad3a764f87f8561f5c5caa

SHA512
8e80dbc6519b6432606dc2daacbe9d11d7580920164d2b12e470790ab92b2a254cd4bd8bf9d6b2242154afa1d9400690a2f7638f447d38af993401fb72d14429

Download Submit
memory/3176-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3176-20-0x0000000002000000-0x0000000002006000-memory.dmp

Filesize
24KB

Download
memory/3176-26-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3176-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4160-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4160-1-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/4160-2-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4160-9-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/4160-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download