bed2571c533504f79bd077b3c45ab07548c940123dfd9a8cd62f4d57809c59b9

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 03:28

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General

Target

2024-05-22_c04938556ed9a60c919173e83e12a49f_cryptolocker.exe
Size

39KB
MD5

c04938556ed9a60c919173e83e12a49f
SHA1

e5759a332f7f7714db9fb35e1ae57d1d9c9d3613
SHA256

bed2571c533504f79bd077b3c45ab07548c940123dfd9a8cd62f4d57809c59b9
SHA512

85e0d9b1371bf38d69ce89e11a501c0e3da2a01c04f4444803dc77f366410601753af62dd9ebdfd1e4943ded1da6b99ee07c996cf9e3b15fc2e43ef2d08327c3
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaQ8:qDdFJy3QMOtEvwDpjjWMl7Tdh

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1512-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2368-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2368-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1512-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2368-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2368-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1512-8-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2368-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2368-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2368 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_c04938556ed9a60c919173e83e12a49f_cryptolocker.exe

pid process

1512 2024-05-22_c04938556ed9a60c919173e83e12a49f_cryptolocker.exe

pid	process
2368	asih.exe

pid	process
1512	2024-05-22_c04938556ed9a60c919173e83e12a49f_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1512-8-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2368-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2368-26-0x0000000000500000-0x0000000000510000-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_c04938556ed9a60c919173e83e12a49f_cryptolocker.exe

description	pid	process	target process
PID 1512 wrote to memory of 2368	1512	2024-05-22_c04938556ed9a60c919173e83e12a49f_cryptolocker.exe	asih.exe
PID 1512 wrote to memory of 2368	1512	2024-05-22_c04938556ed9a60c919173e83e12a49f_cryptolocker.exe	asih.exe
PID 1512 wrote to memory of 2368	1512	2024-05-22_c04938556ed9a60c919173e83e12a49f_cryptolocker.exe	asih.exe
PID 1512 wrote to memory of 2368	1512	2024-05-22_c04938556ed9a60c919173e83e12a49f_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_c04938556ed9a60c919173e83e12a49f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_c04938556ed9a60c919173e83e12a49f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1512

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2368

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
39KB

MD5
eceaf139aac4594edd37f10710d12354

SHA1
e6674a46b68080dd0f9751b62d9921cab00cc62f

SHA256
c3df8ab1afe75616e2de33c1cda8c826bbdb6f19ecaa53280a8b250ab36d7d62

SHA512
84d60d047fe5ba17635aa355da6cee196df8b45bdb4addfb2787871f46a9a5ce026b5702d36309203787e067563a28c34208ff304297da3c335ba19861ba8b8b

Download Submit
memory/1512-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1512-1-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/1512-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1512-8-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2368-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2368-18-0x00000000004B0000-0x00000000004B6000-memory.dmp

Filesize
24KB

Download
memory/2368-25-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2368-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download