f513b3c0534e13857172298aa946b4d4c702a6687ae136123949aa7b5be3c3bd

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
28/03/2024, 09:51

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General

Target

2024-03-28_a57b4335531fb7e975e74a9aac3b01b7_cryptolocker.exe
Size

55KB
MD5

a57b4335531fb7e975e74a9aac3b01b7
SHA1

8b8ddf0a8c24715a497fd5281fe5adac29fb77e1
SHA256

f513b3c0534e13857172298aa946b4d4c702a6687ae136123949aa7b5be3c3bd
SHA512

e306a4bebe8f09c2c2f707a577f0e8eb412b55625587fc0fb903392e5379d17261b02ec9c48631b8a6137a1c38b1ec0900dd8a4a8e051b97099833f89bbf3e8f
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/iVTab3GRuv3VylSV/CdMduYJ:79mqyNhQMOtEvwDpjBPY7xv3g8ZdtJ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/2392-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023177-13.dat	CryptoLocker_rule2
behavioral2/memory/2392-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/2392-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023177-13.dat	CryptoLocker_set1
behavioral2/memory/2392-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

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	2024-03-28_a57b4335531fb7e975e74a9aac3b01b7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
916	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 2392 wrote to memory of 916	2392	2024-03-28_a57b4335531fb7e975e74a9aac3b01b7_cryptolocker.exe	84
PID 2392 wrote to memory of 916	2392	2024-03-28_a57b4335531fb7e975e74a9aac3b01b7_cryptolocker.exe	84
PID 2392 wrote to memory of 916	2392	2024-03-28_a57b4335531fb7e975e74a9aac3b01b7_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-03-28_a57b4335531fb7e975e74a9aac3b01b7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_a57b4335531fb7e975e74a9aac3b01b7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2392
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:916

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
dc35c17596595bad7e4f5a757dfd3b7d

SHA1
456a88d16c88ad09b3ef75d412b0ead1c01b96ac

SHA256
2b4d666452883b0401b73851e56b4d9dd6d0ebd0aa79c19fae4dec5ac855af02

SHA512
26e9cc4ae40f5ce1d8643c54232ca34dfae6e5c3c2c63609363b3ab5a6190d0570cdc766e829a8242880adfde4b8635d5168a834cea119dff59c2fa00bca63dd

Download Submit
memory/916-19-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/916-21-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/2392-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2392-1-0x0000000002320000-0x0000000002326000-memory.dmp

Filesize
24KB

Download
memory/2392-2-0x0000000002320000-0x0000000002326000-memory.dmp

Filesize
24KB

Download
memory/2392-3-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/2392-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download