d546d7c2c1b8a670f4ff229c454e1757362753384d082f2248fcad1dce44d8d5

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 00:58

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General

Target

2024-05-23_ed16d0a278a6f854dc73c4ad3b5f5b2a_cryptolocker.exe
Size

39KB
MD5

ed16d0a278a6f854dc73c4ad3b5f5b2a
SHA1

dd66cb1d04a89a89ab68f727124a4bb37c3af6a8
SHA256

d546d7c2c1b8a670f4ff229c454e1757362753384d082f2248fcad1dce44d8d5
SHA512

b4bfce0a9314d02b50a313f51721687db80fe5ea7b665fae4403c6bfa1ab8d39fec05bda1a6c40ef368cd62c985a1e13f7e02a84d294f7e7e6e822cc63f598af
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan8h:qDdFJy3QMOtEvwDpjjWMl7Tdn8h

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2392-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2392-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4564-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2392-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2392-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4564-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2392-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2392-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4564-27-0x0000000000500000-0x0000000000510000-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:

2024-05-23_ed16d0a278a6f854dc73c4ad3b5f5b2a_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-05-23_ed16d0a278a6f854dc73c4ad3b5f5b2a_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4564 asih.exe

pid	process
4564	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2392-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2392-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4564-27-0x0000000000500000-0x0000000000510000-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:

2024-05-23_ed16d0a278a6f854dc73c4ad3b5f5b2a_cryptolocker.exe

description	pid	process	target process
PID 2392 wrote to memory of 4564	2392	2024-05-23_ed16d0a278a6f854dc73c4ad3b5f5b2a_cryptolocker.exe	asih.exe
PID 2392 wrote to memory of 4564	2392	2024-05-23_ed16d0a278a6f854dc73c4ad3b5f5b2a_cryptolocker.exe	asih.exe
PID 2392 wrote to memory of 4564	2392	2024-05-23_ed16d0a278a6f854dc73c4ad3b5f5b2a_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_ed16d0a278a6f854dc73c4ad3b5f5b2a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_ed16d0a278a6f854dc73c4ad3b5f5b2a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2392

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4564

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
39KB

MD5
458c2f27470ae7ca5213aab57e5efd2b

SHA1
01776be1ba3e829f550a8e97505af9214a36b59f

SHA256
6c30773f97ae9129f1d969f0802e3323ab1e237e4877e9a7a12d49336a07c4fa

SHA512
a06ce96d7b65ec39690834a98b7f12b420333984b106991b42b7d45606540cbe3ba751f78a00e31c6c80b067c945fe69a16afabb9d46f2609e5fe504f2a57fcc

Download Submit
memory/2392-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2392-1-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/2392-9-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/2392-2-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/2392-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4564-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4564-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4564-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download