fd5be67b4759e29340f53feaf6e4c1e8eb4e751b69dd642ccce053c02639a927

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 19:52

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-22_4d9f7f5500ae29193e79b16f1f1161ad_cryptolocker.exe
Size

40KB
MD5

4d9f7f5500ae29193e79b16f1f1161ad
SHA1

cf212fa3c349570403b89a688f3aab964095f2da
SHA256

fd5be67b4759e29340f53feaf6e4c1e8eb4e751b69dd642ccce053c02639a927
SHA512

43efbb28e81aa8045aa52973e85170923632dd6c3a1dcecdae13cba7996c42a6c9efefccffeac41052706c1a1cfd3c888b10a23ee631a48182eb4a1ecc4fc04f
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaB0gd:qDdFJy3QMOtEvwDpjjWMl7TdCgd

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2256-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2256-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2256-14-0x00000000006E0000-0x00000000006F0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3044-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2256-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2256-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2256-14-0x00000000006E0000-0x00000000006F0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3044-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2256-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2256-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2256-14-0x00000000006E0000-0x00000000006F0000-memory.dmp	UPX
behavioral1/memory/3044-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3044 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_4d9f7f5500ae29193e79b16f1f1161ad_cryptolocker.exe

pid process

2256 2024-05-22_4d9f7f5500ae29193e79b16f1f1161ad_cryptolocker.exe

pid	process
3044	asih.exe

pid	process
2256	2024-05-22_4d9f7f5500ae29193e79b16f1f1161ad_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2256-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2256-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2256-14-0x00000000006E0000-0x00000000006F0000-memory.dmp	upx
behavioral1/memory/3044-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_4d9f7f5500ae29193e79b16f1f1161ad_cryptolocker.exe

description	pid	process	target process
PID 2256 wrote to memory of 3044	2256	2024-05-22_4d9f7f5500ae29193e79b16f1f1161ad_cryptolocker.exe	asih.exe
PID 2256 wrote to memory of 3044	2256	2024-05-22_4d9f7f5500ae29193e79b16f1f1161ad_cryptolocker.exe	asih.exe
PID 2256 wrote to memory of 3044	2256	2024-05-22_4d9f7f5500ae29193e79b16f1f1161ad_cryptolocker.exe	asih.exe
PID 2256 wrote to memory of 3044	2256	2024-05-22_4d9f7f5500ae29193e79b16f1f1161ad_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_4d9f7f5500ae29193e79b16f1f1161ad_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_4d9f7f5500ae29193e79b16f1f1161ad_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2256

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3044

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

Loading Replay Monitor...

Downloads

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

Filesize
40KB

MD5
8d8ca9fbc1b86da3f400d8534dc4c0bd

SHA1
59d36808b1dfdb3bf94219e12f13a56f97e61ce4

SHA256
fbe9efed4511261e4d031380a18169bba4a9f002ab7170030f7218cca54ad088

SHA512
2a9ddb5f842201e42b89e63bd77259ff85db7a2f30ba3662cddaf87d1e21c18343d7453078458b8801feacef023748bccea7346e3cb30e60632570ddf6b88462

Download Submit
memory/2256-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2256-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2256-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2256-2-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2256-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2256-14-0x00000000006E0000-0x00000000006F0000-memory.dmp

Filesize
64KB

Download
memory/3044-26-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/3044-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download