baa357e6b7a668181cd00fe40c4c1b6562e33861fc38bc2b3e46d09f51ab11a6

General

Target

2024-05-23_3acb03055347d54be2378309fd803f1a_cryptolocker.exe
Size

39KB
MD5

3acb03055347d54be2378309fd803f1a
SHA1

c28a95780d0b7d0873e6da2cba8e00fdb9bd213c
SHA256

baa357e6b7a668181cd00fe40c4c1b6562e33861fc38bc2b3e46d09f51ab11a6
SHA512

a85f07e17ff1f11d763ea20c83519c3229101deb8c512568ff21990f1a3589c2e01c3ba6b48dd95c3c2d6091b2dda8a73f575253e604564b9773e352b7199a21
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYX6:qDdFJy3QMOtEvwDpjjWMl7Tj

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2488-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1620-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2488-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2488-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1620-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2488-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2488-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1620-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2488-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2488 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_3acb03055347d54be2378309fd803f1a_cryptolocker.exe

pid process

1620 2024-05-23_3acb03055347d54be2378309fd803f1a_cryptolocker.exe

pid	process
2488	asih.exe

pid	process
1620	2024-05-23_3acb03055347d54be2378309fd803f1a_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2488-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1620-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2488-27-0x0000000000500000-0x0000000000510000-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:

2024-05-23_3acb03055347d54be2378309fd803f1a_cryptolocker.exe

description	pid	process	target process
PID 1620 wrote to memory of 2488	1620	2024-05-23_3acb03055347d54be2378309fd803f1a_cryptolocker.exe	asih.exe
PID 1620 wrote to memory of 2488	1620	2024-05-23_3acb03055347d54be2378309fd803f1a_cryptolocker.exe	asih.exe
PID 1620 wrote to memory of 2488	1620	2024-05-23_3acb03055347d54be2378309fd803f1a_cryptolocker.exe	asih.exe
PID 1620 wrote to memory of 2488	1620	2024-05-23_3acb03055347d54be2378309fd803f1a_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_3acb03055347d54be2378309fd803f1a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_3acb03055347d54be2378309fd803f1a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1620

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2488

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
39KB

MD5
d83cfa1b76892926efac659cf294c918

SHA1
f09b449bda6caa3ff6b811c5f787297b9331fff3

SHA256
d679fb5e6803dfdbe83fbda90fbd818704d5964b2b8f6eaddaa3917cd1b45e18

SHA512
0916db7c7f157e586d9762938d341de27b797dd0ea5641c0c88c9f18e179fa3a8dda4dd1d08f243f0c9dda15ffda571e297ed056dcf1fa9dec9b6c8d57366332

Download Submit
memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1620-1-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/1620-2-0x0000000000350000-0x0000000000356000-memory.dmp

Filesize
24KB

Download
memory/1620-9-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/1620-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2488-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2488-19-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2488-26-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2488-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads