a97c3e527f4fa0465ad13ae5eae6d07be0a6ccc4350cdb9d1f61b850b9f795d9

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
29/05/2024, 04:36

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General

Target

2024-05-29_aa71597e3dbeb4accf35ac989307f8b9_cryptolocker.exe
Size

95KB
MD5

aa71597e3dbeb4accf35ac989307f8b9
SHA1

43e63c09d325ae2cf9c142651b21c2db3cd4391c
SHA256

a97c3e527f4fa0465ad13ae5eae6d07be0a6ccc4350cdb9d1f61b850b9f795d9
SHA512

95f41ebcdac886b6f34b231f8de887216764b5e862f760a575cd99b02e531db2f0c5b7cd585b2b0cbc899d197513a0abe343c0c56f799e8b8595e4797875c03c
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp0+S:AnBdOOtEvwDpj6z1

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2184-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d00000001342e-11.dat	CryptoLocker_rule2
behavioral1/memory/3052-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2184-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3052-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2184-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d00000001342e-11.dat	CryptoLocker_set1
behavioral1/memory/3052-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2184-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3052-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2184-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000d00000001342e-11.dat	UPX
behavioral1/memory/3052-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2184-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/3052-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3052	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2184	2024-05-29_aa71597e3dbeb4accf35ac989307f8b9_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2184-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000d00000001342e-11.dat	upx
behavioral1/memory/3052-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2184-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/3052-26-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 2184 wrote to memory of 3052	2184	2024-05-29_aa71597e3dbeb4accf35ac989307f8b9_cryptolocker.exe	28
PID 2184 wrote to memory of 3052	2184	2024-05-29_aa71597e3dbeb4accf35ac989307f8b9_cryptolocker.exe	28
PID 2184 wrote to memory of 3052	2184	2024-05-29_aa71597e3dbeb4accf35ac989307f8b9_cryptolocker.exe	28
PID 2184 wrote to memory of 3052	2184	2024-05-29_aa71597e3dbeb4accf35ac989307f8b9_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-29_aa71597e3dbeb4accf35ac989307f8b9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_aa71597e3dbeb4accf35ac989307f8b9_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2184
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3052

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
95KB

MD5
98c9ca1e369af5b1cfe0eac14026470d

SHA1
24b5a64afa895bed33cb9ddae0656e709a1aed1c

SHA256
f85e9aaf0cafce339c00a250d458d2ad4e44def0fe6f261708e8cb4da945cdbb

SHA512
2fd52c4f0e7d8c438fb9c5a293574332180f60cf76491970deb9f46653746fb603341b7fe183a467bdfae0dd82df78e26d379947ccb3cbe47cb67cb4a3d598c9

Download Submit
memory/2184-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2184-1-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/2184-2-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/2184-9-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/2184-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3052-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3052-18-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/3052-25-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/3052-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download