f1a48607094cd965ac8cb221abc935a8a96f99296cf8e262a338888e7b2ccdc8

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
31/05/2024, 05:27

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General

Target

2024-05-31_4aa3e5ad6eb2be68f60efcf9ae254112_cryptolocker.exe
Size

40KB
MD5

4aa3e5ad6eb2be68f60efcf9ae254112
SHA1

4a3bfa40e0dc36a97b6af1e22e018f61669594f1
SHA256

f1a48607094cd965ac8cb221abc935a8a96f99296cf8e262a338888e7b2ccdc8
SHA512

2107a1bb05fb4d5f43765cc23d1cb050c1ecb131d9af186a0063a4614a67336db425300ed1a4c6498c1b7a255b0f2033c0ccd07235e309b85d8ec5fd37916a00
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan8a:qDdFJy3QMOtEvwDpjjWMl7Tdn8a

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2136-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x00090000000141c0-11.dat	CryptoLocker_rule2
behavioral1/memory/3048-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3048-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/2136-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x00090000000141c0-11.dat	CryptoLocker_set1
behavioral1/memory/3048-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3048-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2136-8-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x00090000000141c0-11.dat	UPX
behavioral1/memory/3048-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3048-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3048	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2136	2024-05-31_4aa3e5ad6eb2be68f60efcf9ae254112_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2136-8-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x00090000000141c0-11.dat	upx
behavioral1/memory/3048-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3048-26-0x0000000000500000-0x0000000000510000-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 4 IoCs

description	pid	Process	procid_target
PID 2136 wrote to memory of 3048	2136	2024-05-31_4aa3e5ad6eb2be68f60efcf9ae254112_cryptolocker.exe	28
PID 2136 wrote to memory of 3048	2136	2024-05-31_4aa3e5ad6eb2be68f60efcf9ae254112_cryptolocker.exe	28
PID 2136 wrote to memory of 3048	2136	2024-05-31_4aa3e5ad6eb2be68f60efcf9ae254112_cryptolocker.exe	28
PID 2136 wrote to memory of 3048	2136	2024-05-31_4aa3e5ad6eb2be68f60efcf9ae254112_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-31_4aa3e5ad6eb2be68f60efcf9ae254112_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_4aa3e5ad6eb2be68f60efcf9ae254112_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2136
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3048

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
40KB

MD5
cdf332e53877c0cddd21b533bd90ca6e

SHA1
219682cabf59626b8538ad96b1e836fb285bad86

SHA256
3c4a35be48660e0669744b1d9e0b8d046466b055f6dc28b4b98a46d6b47ed600

SHA512
545740a9259b1bcb25f399ae99b23fd509f6f3a03b3a46b1345bd02c0fd815da9208dcbd9631998d6e054fa5adeab458e67d336320da9806baff7a89007a96cf

Download Submit
memory/2136-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2136-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2136-8-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2136-1-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/3048-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3048-18-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/3048-25-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/3048-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download