9748b5fc6cc9e73ba4d4923f3878a4d1d857454ac4b7240add41709a249e81fe

General

Target

2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe
Size

40KB
MD5

73e2522bc10147eb0b46ab145c1ac281
SHA1

257792256c6eb77af6ba0e91cc7d9bdfc9bdffa3
SHA256

9748b5fc6cc9e73ba4d4923f3878a4d1d857454ac4b7240add41709a249e81fe
SHA512

9538182be6fb011f04f5583b3c85d8f9bffed606c054687946f63e85fc159ef8bdc912d5784550db1cc663f347f84d785a239c966d6b5e4d6bef72659d854ddc
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBIn:qDdFJy3QMOtEvwDpjjWMl7Tdc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2872-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2872-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2560-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2560-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2872-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2872-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2560-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2560-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2872-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2872-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2560-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2560-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2560 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe

pid process

2872 2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe

pid	process
2560	asih.exe

pid	process
2872	2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2872-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2872-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2560-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2560-27-0x0000000000500000-0x0000000000510000-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_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe

description	pid	process	target process
PID 2872 wrote to memory of 2560	2872	2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe	asih.exe
PID 2872 wrote to memory of 2560	2872	2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe	asih.exe
PID 2872 wrote to memory of 2560	2872	2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe	asih.exe
PID 2872 wrote to memory of 2560	2872	2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_73e2522bc10147eb0b46ab145c1ac281_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2872

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2560

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
40KB

MD5
2a9419b275218f593ed4c03cd41fb4c4

SHA1
6ee5f26841bcd4c216588a009bd77a8daee5a1d8

SHA256
b7470d8b5966bab725688833154818bbab8b68381d427cf5cf499c30912898c2

SHA512
e230e29528823c272fbddad3da172a55204bdae138c1e58522dadc73f8a03a3cf6f48ead04bd7c2af128278e80067b6c91d204b44e67b3e247d817f25fee0a7a

Download Submit
memory/2560-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2560-26-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2560-19-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2560-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2872-1-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2872-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2872-2-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2872-9-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2872-15-0x0000000000500000-0x0000000000510000-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