3a0808cc4350d94bf2f8be14ec4639ea64635af171ec650e6839fceb44780085

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
02/02/2024, 02:40

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General

Target

2024-02-02_db38518b258229325782b2050162ab76_cryptolocker.exe
Size

55KB
MD5

db38518b258229325782b2050162ab76
SHA1

a2eef1e98fca6139a059c5bf3c865aff47601ea3
SHA256

3a0808cc4350d94bf2f8be14ec4639ea64635af171ec650e6839fceb44780085
SHA512

8cf20066d390c493c10d30b65924c31ae090991ee0d47bb7cca29257db5800e9af8b8f5baa03513b766a6b0f8f834ed389db51204d1db5f4ed8ca6d203d84c49
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5ax84uf:z6QFElP6n+gKmddpMOtEvwDpj9aYaO

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4936-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4936-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002322f-16.dat	CryptoLocker_rule2
behavioral2/memory/1512-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4936-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4936-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002322f-16.dat	CryptoLocker_set1
behavioral2/memory/1512-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4936-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4936-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000002322f-16.dat	UPX
behavioral2/memory/1512-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-02-02_db38518b258229325782b2050162ab76_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1512	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4936-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4936-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000700000002322f-16.dat	upx
behavioral2/memory/1512-26-0x0000000000500000-0x0000000000510000-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 4936 wrote to memory of 1512	4936	2024-02-02_db38518b258229325782b2050162ab76_cryptolocker.exe	37
PID 4936 wrote to memory of 1512	4936	2024-02-02_db38518b258229325782b2050162ab76_cryptolocker.exe	37
PID 4936 wrote to memory of 1512	4936	2024-02-02_db38518b258229325782b2050162ab76_cryptolocker.exe	37

C:\Users\Admin\AppData\Local\Temp\2024-02-02_db38518b258229325782b2050162ab76_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-02_db38518b258229325782b2050162ab76_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4936
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1512

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
55KB

MD5
2852ba609d42df29d5601f9071dd13fe

SHA1
4c9490e28f2f7201b4e10996d6008071fe9a1ee5

SHA256
42d2a9d3c1463ae1f7ac21b7b2124ab370a904b487dc9d9e872de73f867d6733

SHA512
bb6e5adfd85632209591bd79bd2f066db4bbaca58e9ab38cb6970cf665d34b661afd359436a76f8633921f0fded381fa9a021994ba2ed16c0866c4b7644e8b11

Download Submit
memory/1512-19-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/1512-25-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/1512-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4936-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4936-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4936-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4936-2-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4936-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download