be72a30b42bb3cb1c5f8c4512530c0f64aa5bb2826d5219e84c6137d6c6dd521

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 01:09

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General

Target

2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe
Size

40KB
MD5

ea4f0041cefd4976bd564a79105aab73
SHA1

25da0d5574e571423cbd7994607d8336d6accdf6
SHA256

be72a30b42bb3cb1c5f8c4512530c0f64aa5bb2826d5219e84c6137d6c6dd521
SHA512

90cfea2f628d150cae1bf0e8f0e330365b82cdf282061ef1bd5840281fccde2b2f44989eb1662018aa81c2d871e53a4a22a642a71dbe4923ee19c134325d11dd
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaB0gi:qDdFJy3QMOtEvwDpjjWMl7TdCgi

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2284-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2284-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3004-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3004-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2284-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2284-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3004-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3004-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2284-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2284-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3004-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3004-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3004 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe

pid process

2284 2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe

pid	process
3004	asih.exe

pid	process
2284	2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2284-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2284-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3004-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3004-26-0x0000000000500000-0x0000000000510000-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_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe

description	pid	process	target process
PID 2284 wrote to memory of 3004	2284	2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe	asih.exe
PID 2284 wrote to memory of 3004	2284	2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe	asih.exe
PID 2284 wrote to memory of 3004	2284	2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe	asih.exe
PID 2284 wrote to memory of 3004	2284	2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_ea4f0041cefd4976bd564a79105aab73_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2284

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3004

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
40KB

MD5
63eb628120e5b6b3a2eeefa884e34bce

SHA1
eb59b504639461960354631f001281fd931b0755

SHA256
48bcad6e146c9086ef3c2de726b066b3dea9566f2287ad9462583ec1c0d8a3ed

SHA512
1f3656bd27e645967615b77ed805ff6ed92498639778203f44da41507a569b14bac99056c442884c8eaf492b4a2b2434d220343ad3f2422cb3531f81bf91a2a6

Download Submit
memory/2284-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2284-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2284-3-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2284-2-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2284-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3004-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3004-19-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/3004-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download