e4fc241496bd0c1ff886bbb7560fce1e1797e3b2d89e39e5c9895a3e6e6d83a5

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
23-05-2024 00:24

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General

Target

2024-05-23_10b25386bc32e25f67bc03a4f4ed7ce9_cryptolocker.exe
Size

60KB
MD5

10b25386bc32e25f67bc03a4f4ed7ce9
SHA1

2052c3bd6e94b75619779b2c8a5bf24a6ab4c160
SHA256

e4fc241496bd0c1ff886bbb7560fce1e1797e3b2d89e39e5c9895a3e6e6d83a5
SHA512

910c8e98ff799dfc4ff7fc50246e3fa8b4a8b12ae3c7ff670a4f0a66647bf53445c8f333de6a4ed86bde068b7002e3cc904407019fa21886202febfd7d448763
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaUf3y:z6a+CdOOtEvwDpjQ1

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2356-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2212-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2356-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2212-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2356-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2212-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2356-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2212-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2356-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2212-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2356-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2212-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2212 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_10b25386bc32e25f67bc03a4f4ed7ce9_cryptolocker.exe

pid process

2356 2024-05-23_10b25386bc32e25f67bc03a4f4ed7ce9_cryptolocker.exe

pid	process
2212	asih.exe

pid	process
2356	2024-05-23_10b25386bc32e25f67bc03a4f4ed7ce9_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2356-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2212-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2356-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2212-25-0x0000000000500000-0x0000000000510000-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:

2024-05-23_10b25386bc32e25f67bc03a4f4ed7ce9_cryptolocker.exe

description	pid	process	target process
PID 2356 wrote to memory of 2212	2356	2024-05-23_10b25386bc32e25f67bc03a4f4ed7ce9_cryptolocker.exe	asih.exe
PID 2356 wrote to memory of 2212	2356	2024-05-23_10b25386bc32e25f67bc03a4f4ed7ce9_cryptolocker.exe	asih.exe
PID 2356 wrote to memory of 2212	2356	2024-05-23_10b25386bc32e25f67bc03a4f4ed7ce9_cryptolocker.exe	asih.exe
PID 2356 wrote to memory of 2212	2356	2024-05-23_10b25386bc32e25f67bc03a4f4ed7ce9_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_10b25386bc32e25f67bc03a4f4ed7ce9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_10b25386bc32e25f67bc03a4f4ed7ce9_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2356

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2212

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

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Downloads

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

Filesize
61KB

MD5
872745d29ea33d2da258d60bbbbbb7de

SHA1
9cc7fa9974013397506c33be29b1ca11361d2565

SHA256
19a2944911f1ffc12d2b1aabb85fd85c119fe576815e9a8075241353846fbf58

SHA512
8ff3143cafcf4cc4281021add9e627aeadaa22ba0d8890ded0c45755f3fbb47d317765f4463fd7bdfd4c53b6fc995b9c316cd3465e0e8a8cda3f97819ace5fde

Download Submit
memory/2212-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2212-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2356-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2356-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2356-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2356-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2356-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download