15eceb1fc32a9084cba4e2270b83587e862e83d6d922069de498d94a84e98737

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
20/04/2024, 07:35

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General

Target

2024-04-20_d34ce6b103c0bebce7d659a47de80c56_cryptolocker.exe
Size

67KB
MD5

d34ce6b103c0bebce7d659a47de80c56
SHA1

5ede667b26c10750010fa248055248ef6ef7be8b
SHA256

15eceb1fc32a9084cba4e2270b83587e862e83d6d922069de498d94a84e98737
SHA512

8758ddd526c3dc04afbb726e56a39eb24977f9fa2750ecd212ed799559e4616f651ba059979bb31036384c3cf7f3d558e45ed20688e5bbacf7ebe457b3bf766a
SSDEEP

768:quVbxjgQNQXtckstOOtEvwDpjAaDOK6PsED3VK2+ZtyOjgO4r9vFAg2rq6W1A1Pe:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAe

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4420-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e9b1-13.dat	CryptoLocker_rule2
behavioral2/memory/4420-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3648-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4420-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e9b1-13.dat	CryptoLocker_set1
behavioral2/memory/4420-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3648-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4420-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000300000001e9b1-13.dat	UPX
behavioral2/memory/4420-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3648-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	2024-04-20_d34ce6b103c0bebce7d659a47de80c56_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3648	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4420-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000300000001e9b1-13.dat	upx
behavioral2/memory/4420-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3648-26-0x0000000000500000-0x000000000050F000-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 3 IoCs

description	pid	Process	procid_target
PID 4420 wrote to memory of 3648	4420	2024-04-20_d34ce6b103c0bebce7d659a47de80c56_cryptolocker.exe	88
PID 4420 wrote to memory of 3648	4420	2024-04-20_d34ce6b103c0bebce7d659a47de80c56_cryptolocker.exe	88
PID 4420 wrote to memory of 3648	4420	2024-04-20_d34ce6b103c0bebce7d659a47de80c56_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-04-20_d34ce6b103c0bebce7d659a47de80c56_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_d34ce6b103c0bebce7d659a47de80c56_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4420
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3648

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
67KB

MD5
9123a334900e652822b1d1c0a5ac3427

SHA1
092e0ff53856d75d7802b9614cc968a0e0ac3470

SHA256
7cbcc3d3ef47a46d8881fd65a84951b31205640f388bdeddb39ba1e27ec251eb

SHA512
21aa3c79455595fc2cc446317b020f8df9c4637c77c274b8777575ebfdc50f66eefefba0e754413d55ccf1091ca11c186a2471dbee78bead8de5346a4c67e4c5

Download Submit
memory/3648-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3648-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3648-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4420-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4420-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4420-2-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4420-3-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/4420-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download