d3ce8239d867f220db9ed9680341b1b0aac157b97365df8b94f6e19fc92fa9b0

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
04/02/2024, 01:40

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General

Target

2024-02-04_a50e75361b06f370955c6c587f131fb3_cryptolocker.exe
Size

80KB
MD5

a50e75361b06f370955c6c587f131fb3
SHA1

51ee81bfd6a26a65402bdf925d5529e685f1629d
SHA256

d3ce8239d867f220db9ed9680341b1b0aac157b97365df8b94f6e19fc92fa9b0
SHA512

acbece244d6f8bb0e62feffad2bb76f323ef60e15db952332dd0562abe602b57b4b256378c6827aa9634691dda102d69240240a53410f7748ebbf4d6e8fc3392
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdWZ5:T6a+rdOOtEvwDpjNtk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1452-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023148-13.dat	CryptoLocker_rule2
behavioral2/memory/1452-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4628-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1452-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023148-13.dat	CryptoLocker_set1
behavioral2/memory/1452-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4628-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1452-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c000000023148-13.dat	UPX
behavioral2/memory/1452-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4628-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-02-04_a50e75361b06f370955c6c587f131fb3_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4628	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1452-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000c000000023148-13.dat	upx
behavioral2/memory/1452-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4628-26-0x0000000000500000-0x0000000000510000-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 1452 wrote to memory of 4628	1452	2024-02-04_a50e75361b06f370955c6c587f131fb3_cryptolocker.exe	83
PID 1452 wrote to memory of 4628	1452	2024-02-04_a50e75361b06f370955c6c587f131fb3_cryptolocker.exe	83
PID 1452 wrote to memory of 4628	1452	2024-02-04_a50e75361b06f370955c6c587f131fb3_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-04_a50e75361b06f370955c6c587f131fb3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_a50e75361b06f370955c6c587f131fb3_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1452
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4628

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
80KB

MD5
9954b008a03203d2204aabdf80496078

SHA1
58e2c1917e17e6568c8b6280c486a0aa37b9a640

SHA256
177e99f84b7676d65090c461063416adcb1a1ae167062e26b415114c7ade5fa4

SHA512
486eb0f539215c18d604d1eccbff30824b4f371a21f145631681e7511562082451e3c78942ec43fd95f57aed9f3a1c1ac3157fce44291554f25978bd7bf7f1af

Download Submit
memory/1452-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1452-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/1452-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1452-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1452-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4628-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4628-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4628-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download