4fcc49318840e6048a80e052b553d49dc312d1e609626d8ee4c598977d0dbea7

Analysis

max time kernel
138s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
20-02-2024 05:52

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General

Target

2024-02-20_709283b698b06fea239e0a5d4588a86f_cryptolocker.exe
Size

97KB
MD5

709283b698b06fea239e0a5d4588a86f
SHA1

ce99d5bcc5b96f211ae59dcbce399ba21863b178
SHA256

4fcc49318840e6048a80e052b553d49dc312d1e609626d8ee4c598977d0dbea7
SHA512

ff2b64b8e852619923fbc09526305df4f081ced028f41224f6e8104fac562e445714a20666e1001bc4eba6950bb9ec103cb290714127d32fba63f9e62fe4b757
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbbr/BKisD:z6a+CdOOtEvwDpjcgD

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3408-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023121-13.dat	CryptoLocker_rule2
behavioral2/memory/3408-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4072-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3408-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023121-13.dat	CryptoLocker_set1
behavioral2/memory/3408-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4072-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3408-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023121-13.dat	UPX
behavioral2/memory/3408-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4072-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-20_709283b698b06fea239e0a5d4588a86f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4072	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3408-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023121-13.dat	upx
behavioral2/memory/3408-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4072-26-0x0000000000500000-0x0000000000510000-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 3408 wrote to memory of 4072	3408	2024-02-20_709283b698b06fea239e0a5d4588a86f_cryptolocker.exe	84
PID 3408 wrote to memory of 4072	3408	2024-02-20_709283b698b06fea239e0a5d4588a86f_cryptolocker.exe	84
PID 3408 wrote to memory of 4072	3408	2024-02-20_709283b698b06fea239e0a5d4588a86f_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-20_709283b698b06fea239e0a5d4588a86f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-20_709283b698b06fea239e0a5d4588a86f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3408
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4072

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
98KB

MD5
52179f7b31b16665cef4e6d0fae76edb

SHA1
e1365e33998999f5c43cc2ffdf999a626baff891

SHA256
b7e7ae03aed5a0081aa4cfdbf60687b282a8ce8c0eb6ba438df660575b0a9263

SHA512
8d8c507e94b4353e2a8178c5ebb6b056bd5b0f331b2e01b818a0b27307b0f5a143db8a46e0a4f66dd8e35fcf7058e7eac83e9cefdfa18f27f9bb594afbaf2055

Download Submit
memory/3408-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3408-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3408-2-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3408-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3408-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4072-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4072-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4072-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download