eb4a76ca7812f0ea21522020deddb860643342372d378c6cbcb78d1b4618d0d2

General

Target

2024-03-14_a968bdc3832a455255d7408206d9a258_cryptolocker.exe
Size

109KB
MD5

a968bdc3832a455255d7408206d9a258
SHA1

511c88df45002bd4b75faf1a41d39bcc16015b05
SHA256

eb4a76ca7812f0ea21522020deddb860643342372d378c6cbcb78d1b4618d0d2
SHA512

f100f6c243fb0b4937f0fab2327ded0fdc4e9c3e1a2f149fdf043c61472f70a17ca783b498d48ba9ed49d528cd456836a5ef6c9c96d81a25789a293b59ecef50
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GksgEne9:1nK6a+qdOOtEvwDpjy

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/1348-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000012264-11.dat	CryptoLocker_rule2
behavioral1/memory/1348-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2600-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1348-12-0x0000000002800000-0x0000000002810000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2600-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/1348-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a000000012264-11.dat	CryptoLocker_set1
behavioral1/memory/1348-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2600-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/1348-12-0x0000000002800000-0x0000000002810000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2600-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/1348-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000a000000012264-11.dat	UPX
behavioral1/memory/1348-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2600-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/1348-12-0x0000000002800000-0x0000000002810000-memory.dmp	UPX
behavioral1/memory/2600-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2600	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1348	2024-03-14_a968bdc3832a455255d7408206d9a258_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1348-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000a000000012264-11.dat	upx
behavioral1/memory/1348-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2600-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/1348-12-0x0000000002800000-0x0000000002810000-memory.dmp	upx
behavioral1/memory/2600-27-0x0000000000500000-0x000000000050F311-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 4 IoCs

description	pid	Process	procid_target
PID 1348 wrote to memory of 2600	1348	2024-03-14_a968bdc3832a455255d7408206d9a258_cryptolocker.exe	28
PID 1348 wrote to memory of 2600	1348	2024-03-14_a968bdc3832a455255d7408206d9a258_cryptolocker.exe	28
PID 1348 wrote to memory of 2600	1348	2024-03-14_a968bdc3832a455255d7408206d9a258_cryptolocker.exe	28
PID 1348 wrote to memory of 2600	1348	2024-03-14_a968bdc3832a455255d7408206d9a258_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-14_a968bdc3832a455255d7408206d9a258_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-14_a968bdc3832a455255d7408206d9a258_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1348
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
109KB

MD5
d35675ecb2704a55de42f351b139fc22

SHA1
baec909fc5e342708b9bda83ef5452630e483cac

SHA256
c3aecd255d92c53ab75a9245eca19e45b8de07528b1755697c86f00cd9c0825d

SHA512
31273ac19f735da3cd2f75eff021115d420c0a2a9125cc7f011319ac5d9bdb08a30fc8e5f80f4aaccf858311c1c06617c6e10eaf3b6708283ed7ca696d0b3ff2

Download Submit
memory/1348-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1348-1-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/1348-2-0x0000000001CD0000-0x0000000001CD6000-memory.dmp

Filesize
24KB

Download
memory/1348-4-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/1348-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1348-12-0x0000000002800000-0x0000000002810000-memory.dmp

Filesize
64KB

Download
memory/2600-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2600-21-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2600-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

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