b72ee8946f5a4e0bc20ed03a751c0709478e6b68508bc6231a3f2402ea9e365d

Analysis

max time kernel
148s
max time network
151s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 20:58

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General

Target

2024-05-22_88717b7d0c312cc2230c08cfd325a33c_cryptolocker.exe
Size

91KB
MD5

88717b7d0c312cc2230c08cfd325a33c
SHA1

3a21c43f7f2ea9205a68125116b013f1664f7235
SHA256

b72ee8946f5a4e0bc20ed03a751c0709478e6b68508bc6231a3f2402ea9e365d
SHA512

8d35cb6025bb7d069d9f146b57411d6040cbf4cb2d561e0608100186adce6701d1f1562765bd7820b198c3a59f141b8187b610f5a402c4d053d3cbb6c73be969
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgddN:AnBdOOtEvwDpj6zp

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3016-8-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2992-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2992-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3016-8-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2992-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2992-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3016-8-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2992-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2992-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2992 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_88717b7d0c312cc2230c08cfd325a33c_cryptolocker.exe

pid process

3016 2024-05-22_88717b7d0c312cc2230c08cfd325a33c_cryptolocker.exe

pid	process
2992	asih.exe

pid	process
3016	2024-05-22_88717b7d0c312cc2230c08cfd325a33c_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/3016-8-0x0000000000500000-0x000000000050F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2992-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2992-26-0x0000000000500000-0x000000000050F000-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

Processes:

2024-05-22_88717b7d0c312cc2230c08cfd325a33c_cryptolocker.exe

description	pid	process	target process
PID 3016 wrote to memory of 2992	3016	2024-05-22_88717b7d0c312cc2230c08cfd325a33c_cryptolocker.exe	asih.exe
PID 3016 wrote to memory of 2992	3016	2024-05-22_88717b7d0c312cc2230c08cfd325a33c_cryptolocker.exe	asih.exe
PID 3016 wrote to memory of 2992	3016	2024-05-22_88717b7d0c312cc2230c08cfd325a33c_cryptolocker.exe	asih.exe
PID 3016 wrote to memory of 2992	3016	2024-05-22_88717b7d0c312cc2230c08cfd325a33c_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_88717b7d0c312cc2230c08cfd325a33c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_88717b7d0c312cc2230c08cfd325a33c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3016
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2992

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
91KB

MD5
0f00c8b04e5a2a44f0ca0fe6ad157568

SHA1
8c0e08becb5528cd0c8641b153c9a524034a75d8

SHA256
b1b0d48b819f3dd7942f6ca3f9d80d8b29b54471779cae573f6e14419155096d

SHA512
6349c38e52404ab863c945171dd1985640a941fa55970b2dcd21d1393c217ec560ef4956d9c3aa0faafdf304bf43090fe55eb718aad7eb6d5d714b41f7a6fecb

Download Submit
memory/2992-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2992-18-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2992-25-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2992-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3016-9-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/3016-8-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3016-1-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/3016-0-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download