eeb61b3ec77073f1bf940203095cc08fb330e52be85c2701c1ad4862006888eb

General

Target

2024-06-15_b9face1318fd3c19904eaf706eef4abf_cryptolocker.exe
Size

42KB
MD5

b9face1318fd3c19904eaf706eef4abf
SHA1

485ada8036ef294adc479a07a7d9db31d0b08aa2
SHA256

eeb61b3ec77073f1bf940203095cc08fb330e52be85c2701c1ad4862006888eb
SHA512

eded327ee44dbdb54e50ce74719b7fb249ac673a8544e5acb2319e56f28a6c02ffbb655c3b011a8b3072f8acf5c1de0924abb5d447ecf65f3dd68df2c4d44d94
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYljv:qDdFJy3QMOtEvwDpjjWMl7T6L

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/1720-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b0000000144ac-11.dat	CryptoLocker_rule2
behavioral1/memory/1720-13-0x0000000000640000-0x0000000000650000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1720-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2964-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2964-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/1720-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b0000000144ac-11.dat	CryptoLocker_set1
behavioral1/memory/1720-13-0x0000000000640000-0x0000000000650000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1720-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2964-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2964-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/1720-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b0000000144ac-11.dat	UPX
behavioral1/memory/1720-13-0x0000000000640000-0x0000000000650000-memory.dmp	UPX
behavioral1/memory/1720-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2964-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2964-28-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2964	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1720	2024-06-15_b9face1318fd3c19904eaf706eef4abf_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1720-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b0000000144ac-11.dat	upx
behavioral1/memory/1720-13-0x0000000000640000-0x0000000000650000-memory.dmp	upx
behavioral1/memory/1720-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2964-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2964-28-0x0000000000500000-0x0000000000510000-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 4 IoCs

description	pid	Process	procid_target
PID 1720 wrote to memory of 2964	1720	2024-06-15_b9face1318fd3c19904eaf706eef4abf_cryptolocker.exe	28
PID 1720 wrote to memory of 2964	1720	2024-06-15_b9face1318fd3c19904eaf706eef4abf_cryptolocker.exe	28
PID 1720 wrote to memory of 2964	1720	2024-06-15_b9face1318fd3c19904eaf706eef4abf_cryptolocker.exe	28
PID 1720 wrote to memory of 2964	1720	2024-06-15_b9face1318fd3c19904eaf706eef4abf_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-15_b9face1318fd3c19904eaf706eef4abf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-15_b9face1318fd3c19904eaf706eef4abf_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1720
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2964

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
42KB

MD5
d771da7ee9ac30238691cad1d90c2c9e

SHA1
88c0fbb1cb1c913f908532269ea43c90c3ad872e

SHA256
63a440959b063047a3619c75bf3deacbb6b86856f104122e5fe6a110102113b0

SHA512
f5dfd00d06727068a78dc46255034d72818a90dab85f3f58e610f1763a6f05be57daeed7555c923589e5b4c5729c8f8689bf691b79cf82934b3491f2abfa02e3

Download Submit
memory/1720-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1720-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1720-2-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/1720-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1720-13-0x0000000000640000-0x0000000000650000-memory.dmp

Filesize
64KB

Download
memory/1720-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2964-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2964-20-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/2964-27-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2964-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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