1b8156b25d86a12127e0dcb30ee92aa952c0a3062d38d919959cb6b9a78651b6

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
20/04/2024, 08:45

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General

Target

2024-04-20_f545647b72755c0c53a635c18db1d0ea_cryptolocker.exe
Size

38KB
MD5

f545647b72755c0c53a635c18db1d0ea
SHA1

0e4c1aa550cd71023c26c798339908faa2ee6d01
SHA256

1b8156b25d86a12127e0dcb30ee92aa952c0a3062d38d919959cb6b9a78651b6
SHA512

d129c2f992de73f47be7c23d841f83c11dfdb7938fe83521102779d7378b0d579cbc4b9f5f821e783eb330fae4ec683597286ce0c1225d0ff9c5a22f062ae4a9
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITsl:qDdFJy3QMOtEvwDpjjWMl7Tsl

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/696-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e970-13.dat	CryptoLocker_rule2
behavioral2/memory/696-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1588-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/696-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e970-13.dat	CryptoLocker_set1
behavioral2/memory/696-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1588-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/696-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000001e970-13.dat	UPX
behavioral2/memory/696-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1588-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation	2024-04-20_f545647b72755c0c53a635c18db1d0ea_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1588	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/696-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000300000001e970-13.dat	upx
behavioral2/memory/696-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1588-26-0x0000000000500000-0x0000000000510000-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 696 wrote to memory of 1588	696	2024-04-20_f545647b72755c0c53a635c18db1d0ea_cryptolocker.exe	86
PID 696 wrote to memory of 1588	696	2024-04-20_f545647b72755c0c53a635c18db1d0ea_cryptolocker.exe	86
PID 696 wrote to memory of 1588	696	2024-04-20_f545647b72755c0c53a635c18db1d0ea_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-20_f545647b72755c0c53a635c18db1d0ea_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_f545647b72755c0c53a635c18db1d0ea_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:696
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1588

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
38KB

MD5
428eee7dba7d2cc6e2c8f7ca4d567f0b

SHA1
470601c66c7fd8ec14c4dbaf3d61d47337c2a7dd

SHA256
768fc5322f937aed6d89c2931ec1e6e756430f2f045fed75feb1b3f65bb4f426

SHA512
c08cb31a4e29c3828bac4f84c76403cba8980da498afeb919e23d43cba15ac5bc7cc2d5ab8e606f17cc09dade3c8fc0acbbab572fb47011784d729dea2a045c3

Download Submit
memory/696-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/696-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/696-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/696-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/696-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1588-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/1588-20-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1588-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download