3d3106851950018e0d1a33bbfb8f84157019bab06d18d8888e0d61303bd00ec3

General

Target

2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe
Size

39KB
MD5

fabbd2708bc61db2fae455d651fe142f
SHA1

b63745195d55ad18bcafbe531bd74fdedd101461
SHA256

3d3106851950018e0d1a33bbfb8f84157019bab06d18d8888e0d61303bd00ec3
SHA512

6f76cf5c8c53dda6ed080eb17306650de78a4acaff793e7cc940b0858a966454baf53c87c2ea1e7f67fec802d258a857af9600795e84e77a715cf338c1d51127
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBY:qDdFJy3QMOtEvwDpjjWMl7TdK

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2400-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2580-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2400-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2580-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2400-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2580-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2400-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2580-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2400-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2580-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2400-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2580-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2580 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe

pid process

2400 2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe

pid	process
2580	asih.exe

pid	process
2400	2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2400-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2580-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2400-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2580-27-0x0000000000500000-0x0000000000510000-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_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe

description	pid	process	target process
PID 2400 wrote to memory of 2580	2400	2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe	asih.exe
PID 2400 wrote to memory of 2580	2400	2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe	asih.exe
PID 2400 wrote to memory of 2580	2400	2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe	asih.exe
PID 2400 wrote to memory of 2580	2400	2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_fabbd2708bc61db2fae455d651fe142f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2400

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2580

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
40KB

MD5
0c3bb868150e16b154fba3a33aff40a6

SHA1
3f3c04372f697ab2cd9aef7fe87c41cc01b98380

SHA256
5b6a8a1c5705fcf62689f8fab9965232c306053566d6b36b380e03ab72561c1c

SHA512
d709e21096b404215176c0b00a3d3c458fc0285f1bdbfefb620a91dd1d908920c1f84b8078ab9444c265fe9f44802a4211a5bef10f1d9f67cedbd9700576a7e3

Download Submit
memory/2400-0-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2400-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2400-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2400-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2400-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2580-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2580-19-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2580-26-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/2580-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads