f250ab1904621a7e368450a917402bbb55eb85bc4e1dee34bec3007368143614

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
26/04/2024, 04:25

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General

Target

2024-04-26_0ce01ba894374b2d5d97364b8929072d_cryptolocker.exe
Size

89KB
MD5

0ce01ba894374b2d5d97364b8929072d
SHA1

ac450e603eef79c4437372909abf9b4f7d39ce46
SHA256

f250ab1904621a7e368450a917402bbb55eb85bc4e1dee34bec3007368143614
SHA512

d6c3cf22288ae159b98f5b5abe5387493a0c864aa5c9ac71c3b99f73054a64c710752a1ab789017d2e8447f3d8c8a4a85cddca7ae881553f1dd6fef58f23cafa
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgddB:AnBdOOtEvwDpj6zV

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4360-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e9b1-13.dat	CryptoLocker_rule2
behavioral2/memory/4360-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2156-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4360-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e9b1-13.dat	CryptoLocker_set1
behavioral2/memory/4360-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2156-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4360-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000300000001e9b1-13.dat	UPX
behavioral2/memory/4360-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2156-26-0x0000000000500000-0x000000000050F000-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	2024-04-26_0ce01ba894374b2d5d97364b8929072d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2156	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4360-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000300000001e9b1-13.dat	upx
behavioral2/memory/4360-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2156-26-0x0000000000500000-0x000000000050F000-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 4360 wrote to memory of 2156	4360	2024-04-26_0ce01ba894374b2d5d97364b8929072d_cryptolocker.exe	89
PID 4360 wrote to memory of 2156	4360	2024-04-26_0ce01ba894374b2d5d97364b8929072d_cryptolocker.exe	89
PID 4360 wrote to memory of 2156	4360	2024-04-26_0ce01ba894374b2d5d97364b8929072d_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-04-26_0ce01ba894374b2d5d97364b8929072d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-26_0ce01ba894374b2d5d97364b8929072d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4360
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2156

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
89KB

MD5
d6346d05c32508a53ea6586479d68653

SHA1
cb0a86802e4a36a0a3032b079c14706c590125cd

SHA256
c9fd62edbd5cf76abf6e030b80da5f4687fa86f862df720ce0251f168979d92d

SHA512
863233e36eb8d366745a5c7f6f8421f5ae04fe92554659ad8075040c932b0b0f1847bb512cd92e6976b8ac37936ed164ba6169334c0796db18e19d1e16c455ac

Download Submit
memory/2156-19-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/2156-25-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/2156-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4360-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4360-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4360-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4360-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/4360-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download