4bd45c77b89d4810a3adb64203b6885bfbf2a8e8cbdee1f1de0ed396e3edd4ae

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
16/05/2024, 19:45

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General

Target

2024-05-16_6a42033e9872b948758a0fdc77a47548_cryptolocker.exe
Size

39KB
MD5

6a42033e9872b948758a0fdc77a47548
SHA1

6033658d4d25dee125a583756e4b04377b63afd1
SHA256

4bd45c77b89d4810a3adb64203b6885bfbf2a8e8cbdee1f1de0ed396e3edd4ae
SHA512

3e91122f7448f7a6891302d39673bbe1adc724b5bd210beee35ee32f758d824031883be90c7e138fa342a0d802202c8abaf5ce233fc417469f84aef77644e60e
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYabDih:qDdFJy3QMOtEvwDpjjWMl7TdK

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/624-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_rule2
behavioral2/memory/624-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2924-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/624-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_set1
behavioral2/memory/624-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2924-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/624-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000022f51-13.dat	UPX
behavioral2/memory/624-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2924-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-16_6a42033e9872b948758a0fdc77a47548_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2924	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/624-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000022f51-13.dat	upx
behavioral2/memory/624-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2924-26-0x0000000000500000-0x0000000000510000-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 3 IoCs

description	pid	Process	procid_target
PID 624 wrote to memory of 2924	624	2024-05-16_6a42033e9872b948758a0fdc77a47548_cryptolocker.exe	83
PID 624 wrote to memory of 2924	624	2024-05-16_6a42033e9872b948758a0fdc77a47548_cryptolocker.exe	83
PID 624 wrote to memory of 2924	624	2024-05-16_6a42033e9872b948758a0fdc77a47548_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-16_6a42033e9872b948758a0fdc77a47548_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-16_6a42033e9872b948758a0fdc77a47548_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:624
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2924

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
39KB

MD5
31379f64bdee85bb4d5b17f680c4173d

SHA1
4b809ef63fc3b07840dba41623c2e87abf565a81

SHA256
12732186eb192ce61f7ca556e2ad5aa777931d4c6548a08e60e9e737796847dc

SHA512
de38c77b939ee8cb19b04c979bd755e6fbefd4b724b7afc531aec99c3990cdfbf0298895f7a7f4806c3670c7351f5f28d708ecdda4fefc97b36276582702e7d3

Download Submit
memory/624-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/624-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/624-2-0x0000000000870000-0x0000000000876000-memory.dmp

Filesize
24KB

Download
memory/624-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/624-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2924-19-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/2924-25-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/2924-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download