3cfa4c79963b90a47f6923b4f00c883e09e8f73a402d4a2ded9925dc2ecd6489

General

Target

2024-04-27_037507011db2942e93cf9faf3792d382_cryptolocker.exe
Size

38KB
MD5

037507011db2942e93cf9faf3792d382
SHA1

a3c07382676f1186ee6351623a41d8ccad7e896a
SHA256

3cfa4c79963b90a47f6923b4f00c883e09e8f73a402d4a2ded9925dc2ecd6489
SHA512

7e767dd4292f01cf22434ad19a76df4a29f0776372ee0c6691c7e59ba7ad32b5bf8b6fdfcfd65ed4f72e80026cacd6d76b11aadaf0d6f57b7fbc79b9cb2268c4
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaP5:qDdFJy3QMOtEvwDpjjWMl7Tdx

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2912-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2912-13-0x00000000005C0000-0x00000000005D0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2036-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2036-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2912-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2912-13-0x00000000005C0000-0x00000000005D0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2036-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2036-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2912-8-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2912-13-0x00000000005C0000-0x00000000005D0000-memory.dmp	UPX
behavioral1/memory/2036-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2036-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2036 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-04-27_037507011db2942e93cf9faf3792d382_cryptolocker.exe

pid process

2912 2024-04-27_037507011db2942e93cf9faf3792d382_cryptolocker.exe

pid	process
2036	asih.exe

pid	process
2912	2024-04-27_037507011db2942e93cf9faf3792d382_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2912-8-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2912-13-0x00000000005C0000-0x00000000005D0000-memory.dmp	upx
behavioral1/memory/2036-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2036-27-0x0000000000500000-0x0000000000510000-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:

2024-04-27_037507011db2942e93cf9faf3792d382_cryptolocker.exe

description	pid	process	target process
PID 2912 wrote to memory of 2036	2912	2024-04-27_037507011db2942e93cf9faf3792d382_cryptolocker.exe	asih.exe
PID 2912 wrote to memory of 2036	2912	2024-04-27_037507011db2942e93cf9faf3792d382_cryptolocker.exe	asih.exe
PID 2912 wrote to memory of 2036	2912	2024-04-27_037507011db2942e93cf9faf3792d382_cryptolocker.exe	asih.exe
PID 2912 wrote to memory of 2036	2912	2024-04-27_037507011db2942e93cf9faf3792d382_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-27_037507011db2942e93cf9faf3792d382_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_037507011db2942e93cf9faf3792d382_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2912

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2036

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
a88c238a254b88ff8573cca348f638ef

SHA1
e795b16c6d13896ce875990ca3de8775f3732e2d

SHA256
ee0a8233315d7a915af0d513bf6bb1a2a5416f944ae400387cea3dfc75288c3c

SHA512
5791bf517f0afc534dbb5a118e3171b71c520a84e53ac0ca0d38eb86d415899e411de125a987163b0bc060455872bac8cf501e81becda8f3a77dec9a323472e8

Download Submit
memory/2036-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2036-19-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2036-26-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2036-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2912-0-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2912-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2912-8-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2912-1-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2912-13-0x00000000005C0000-0x00000000005D0000-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