ce68b6e12521e3fdb126cba388e98b3ebeda44b4751339e57fb2a9a532af21aa

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
21-05-2024 16:37

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General

Target

2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe
Size

60KB
MD5

4f26203729e8b75dcb7fa88269997e52
SHA1

9802af3e4ab140739481f241ca6a881cccc27d2e
SHA256

ce68b6e12521e3fdb126cba388e98b3ebeda44b4751339e57fb2a9a532af21aa
SHA512

3084699a47f05f37d3b0d77da48aa181c0ee7aee70f163d54d19c78749f5b472873d003f4cad5b58e6c2fb804eeafb77d358e75924aa78b9dafa0b2c856e72ce
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaUf3I:z6a+CdOOtEvwDpjQz

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1976-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1976-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1688-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1688-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1976-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/1976-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1688-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1688-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1976-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1976-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1688-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1688-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1688 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe

pid process

1976 2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe

pid	process
1688	asih.exe

pid	process
1976	2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1976-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/1976-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1688-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1688-25-0x0000000000500000-0x0000000000510000-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:

2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe

description	pid	process	target process
PID 1976 wrote to memory of 1688	1976	2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe	asih.exe
PID 1976 wrote to memory of 1688	1976	2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe	asih.exe
PID 1976 wrote to memory of 1688	1976	2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe	asih.exe
PID 1976 wrote to memory of 1688	1976	2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_4f26203729e8b75dcb7fa88269997e52_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1976

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:1688

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
60KB

MD5
ae3ef3d953486e45cef8cb665a4ea776

SHA1
55d206b70b3790cd24b8b6c75a2b8692064f64fa

SHA256
4b37cf42d58b2ebb59ab80b1114a6223fe5d8bf4ae928d289323a21b1d8d4db9

SHA512
6c78350508f51fe40b0dfb9b7d8dd32fdbe2d10dfb4af379544d7809fbf9e29e8807ef964e33e4bc05def581550ea20e3ba044af92ec1253ed67918f02c2461b

Download Submit
memory/1688-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1688-18-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/1688-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1976-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1976-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1976-2-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/1976-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1976-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download