655eee17fdbf24947e0e98df8d1bada32fedaa4d792f9d56d1faa370e617e478

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
14/05/2024, 21:25

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General

Target

2024-05-14_1af6302b46ad9422bef250904742bcf9_cryptolocker.exe
Size

38KB
MD5

1af6302b46ad9422bef250904742bcf9
SHA1

57430e6de8870e1f30e435b113c47e64bf38f77d
SHA256

655eee17fdbf24947e0e98df8d1bada32fedaa4d792f9d56d1faa370e617e478
SHA512

771644e724c699074477a103fe5e722e1d25220d920a1fd3548968c9b4e8c1422689f1328b7a03e250db67fb812c180391997bf3a87b3b817a8e9f2eba62bfe2
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY9ji:qDdFJy3QMOtEvwDpjjWMl7TUi

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2124-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a000000021677-13.dat	CryptoLocker_rule2
behavioral2/memory/2124-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5084-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2124-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000a000000021677-13.dat	CryptoLocker_set1
behavioral2/memory/2124-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5084-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2124-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000a000000021677-13.dat	UPX
behavioral2/memory/2124-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5084-26-0x0000000000500000-0x0000000000510000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-14_1af6302b46ad9422bef250904742bcf9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5084	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2124-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000a000000021677-13.dat	upx
behavioral2/memory/2124-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/5084-26-0x0000000000500000-0x0000000000510000-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 2124 wrote to memory of 5084	2124	2024-05-14_1af6302b46ad9422bef250904742bcf9_cryptolocker.exe	82
PID 2124 wrote to memory of 5084	2124	2024-05-14_1af6302b46ad9422bef250904742bcf9_cryptolocker.exe	82
PID 2124 wrote to memory of 5084	2124	2024-05-14_1af6302b46ad9422bef250904742bcf9_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-14_1af6302b46ad9422bef250904742bcf9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-14_1af6302b46ad9422bef250904742bcf9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2124
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5084

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
39KB

MD5
0bb8bac3c6db61759ec71874f7bd117d

SHA1
3c67cfbcdbab7bdebdbc1e4a0e60f4619367d88f

SHA256
5d15a115397ac81e782e3928e14e70b4a846258bea38446f30629b37660d0479

SHA512
2950bb364fb3a778485ad6db9c4e2d6d73314a217b81c3bea4c1d255575c2c04108f588bca2df899f4086354bf556525f490b2562e7daa03efe0f494b41d6cc4

Download Submit
memory/2124-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2124-1-0x00000000007C0000-0x00000000007C6000-memory.dmp

Filesize
24KB

Download
memory/2124-3-0x00000000007E0000-0x00000000007E6000-memory.dmp

Filesize
24KB

Download
memory/2124-2-0x00000000007C0000-0x00000000007C6000-memory.dmp

Filesize
24KB

Download
memory/2124-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5084-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5084-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5084-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download