5a96a8532e438520585af48a3556508d8749deb013edcc8e619f6d2b0811b3f2

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2024, 08:52

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General

Target

2024-02-19_c5db8b49a28cfda9d8c86c54104e1e89_cryptolocker.exe
Size

46KB
MD5

c5db8b49a28cfda9d8c86c54104e1e89
SHA1

01814312a96ffe0e53b191ab4f922ad1e0842e1f
SHA256

5a96a8532e438520585af48a3556508d8749deb013edcc8e619f6d2b0811b3f2
SHA512

3fac67df0e6a93989bdb5777e128cac4504973c7e8e6c61dd5dc527dc026bc2721b83d319762a532d6a993fceef87eb6374f870db7230a2cad8b59d9108e6022
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoN:qmbhXDmjr5MOtEvwDpj5cDtKkQZQT

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2020-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023201-13.dat	CryptoLocker_rule2
behavioral2/memory/2020-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4676-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/2020-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4676-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2020-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023201-13.dat	UPX
behavioral2/memory/2020-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4676-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	2024-02-19_c5db8b49a28cfda9d8c86c54104e1e89_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4676	asih.exe

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 2020 wrote to memory of 4676	2020	2024-02-19_c5db8b49a28cfda9d8c86c54104e1e89_cryptolocker.exe	84
PID 2020 wrote to memory of 4676	2020	2024-02-19_c5db8b49a28cfda9d8c86c54104e1e89_cryptolocker.exe	84
PID 2020 wrote to memory of 4676	2020	2024-02-19_c5db8b49a28cfda9d8c86c54104e1e89_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-19_c5db8b49a28cfda9d8c86c54104e1e89_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_c5db8b49a28cfda9d8c86c54104e1e89_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2020
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4676

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
47KB

MD5
906777c3ae952d17c42680ec2d16312a

SHA1
ec537f605fdeac93ef9496e520edebbc8ae22a89

SHA256
9c3527488723a5a84ec636f0f91e5ffa6198a5394524630f1e2b94b1dfa11f39

SHA512
97f9435255b08a2a700d988d1b3e66509e14d5e84d652076b6efe1b40e25ca2d6fd449df1a39ffb354c955de6e497b59d80638b334118287be5ce31a62218c57

Download Submit
memory/2020-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2020-1-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/2020-2-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/2020-3-0x0000000000690000-0x0000000000696000-memory.dmp

Filesize
24KB

Download
memory/2020-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4676-20-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4676-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4676-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download