9ad5ecbe456b85a26b97b775353dfc74cd4c678f19febee7ed46874e7fb0e1b3

General

Target

2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe
Size

77KB
MD5

bb8bdc9688621afd9fdc7f163eae51ee
SHA1

d67c6c3e935625d027ab5611d332ed505dbc071d
SHA256

9ad5ecbe456b85a26b97b775353dfc74cd4c678f19febee7ed46874e7fb0e1b3
SHA512

8a079160bb57b94ef566595fb4a76827900e34960832c475c010dfa2d0bae76c7b3764ec90bdc067918e36d414aeeaefd2b0b99dddc5d2297946b9d6abad2fd8
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxzV:T6a+rdOOtEvwDpjNtHPy

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2804-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d00000001224c-11.dat	CryptoLocker_rule2
behavioral1/memory/2804-12-0x00000000004E0000-0x00000000004F0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2804-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2064-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2064-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2804-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d00000001224c-11.dat	CryptoLocker_set1
behavioral1/memory/2804-12-0x00000000004E0000-0x00000000004F0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2804-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2064-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2064-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2804-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000d00000001224c-11.dat	UPX
behavioral1/memory/2804-12-0x00000000004E0000-0x00000000004F0000-memory.dmp	UPX
behavioral1/memory/2804-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2064-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2064-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2064	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2804	2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2804-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000d00000001224c-11.dat	upx
behavioral1/memory/2804-12-0x00000000004E0000-0x00000000004F0000-memory.dmp	upx
behavioral1/memory/2804-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2064-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2064-27-0x0000000000500000-0x0000000000510000-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 2804 wrote to memory of 2064	2804	2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe	28
PID 2804 wrote to memory of 2064	2804	2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe	28
PID 2804 wrote to memory of 2064	2804	2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe	28
PID 2804 wrote to memory of 2064	2804	2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2804
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2064

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
77KB

MD5
af3d45d5d91a68ef84c790824d3149c5

SHA1
f93b1bc76647e8dafe13e12707122850e6f214a3

SHA256
3d770b3cd152bee6dc399b95a5d8da207c1c61269ce7d275b93a1ec07ee3ec6e

SHA512
9e040c024028115884ff81f5ca1048b71157c036c4f1a88bcac70738afd8311d58e0e31e846f0e4825f3de450df59562629548fc33e5cc67ffdb9d88d8818fe9

Download Submit
memory/2064-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2064-19-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2064-21-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2064-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2804-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2804-1-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2804-2-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2804-4-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2804-12-0x00000000004E0000-0x00000000004F0000-memory.dmp

Filesize
64KB

Download
memory/2804-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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