41a5401a11d6cbf0ca5ea163e83b9e387e1e72bea0007fad183ab0828abbbc17

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
11/03/2024, 14:32

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General

Target

2024-03-11_868cbf4c621d4619deddc9af7fec1bea_cryptolocker.exe
Size

127KB
MD5

868cbf4c621d4619deddc9af7fec1bea
SHA1

05fc12722edf61bbb47add9fdb2eb8f4afa7d841
SHA256

41a5401a11d6cbf0ca5ea163e83b9e387e1e72bea0007fad183ab0828abbbc17
SHA512

d51abd8676218de9cf9b11039df8a6c4bea5b1c260b191fed3de2a53e52935bb003a5d6780297efe9e468f021d677f66433a594c430da991b8a617a51a69f564
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eIEZ:AnBdOOtEvwDpj6zn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2892-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023235-13.dat	CryptoLocker_rule2
behavioral2/memory/2892-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4904-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2892-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023235-13.dat	CryptoLocker_set1
behavioral2/memory/2892-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4904-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2892-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0007000000023235-13.dat	UPX
behavioral2/memory/2892-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4904-26-0x0000000000500000-0x000000000050F000-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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	2024-03-11_868cbf4c621d4619deddc9af7fec1bea_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4904	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2892-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0007000000023235-13.dat	upx
behavioral2/memory/2892-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4904-26-0x0000000000500000-0x000000000050F000-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 2892 wrote to memory of 4904	2892	2024-03-11_868cbf4c621d4619deddc9af7fec1bea_cryptolocker.exe	90
PID 2892 wrote to memory of 4904	2892	2024-03-11_868cbf4c621d4619deddc9af7fec1bea_cryptolocker.exe	90
PID 2892 wrote to memory of 4904	2892	2024-03-11_868cbf4c621d4619deddc9af7fec1bea_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-11_868cbf4c621d4619deddc9af7fec1bea_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-11_868cbf4c621d4619deddc9af7fec1bea_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2892
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4904

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
127KB

MD5
db430547736426612fc98108b4e8a1cd

SHA1
3aa0576795f72663f7e6a8d4d7ee0481606dbdb1

SHA256
358f1ddfb62ef8f897454e97ba903994b96fb1d7bb1e5eaa5351ca64d067a804

SHA512
638e7d07cd450001ad74b99cb43bf5aec7e65098c7c0b422eb321e30f7301633d309315be647f4835489cf85c971750fa0409e514b7017af7ed72e3f3328019c

Download Submit
memory/2892-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2892-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2892-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2892-3-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/2892-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4904-19-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/4904-25-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4904-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download