4303207c332b4c38bfbf2e44e329f30e99e01b69f279817239f54632a17039e8

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
25/04/2024, 13:51

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General

Target

2024-04-25_5c2c1f3e3e73c3f9a0d53087646e8b90_cryptolocker.exe
Size

70KB
MD5

5c2c1f3e3e73c3f9a0d53087646e8b90
SHA1

50dcf12d5a2bea701b11ebbf63b41460cb341f04
SHA256

4303207c332b4c38bfbf2e44e329f30e99e01b69f279817239f54632a17039e8
SHA512

6381764580f22b49d28bfff7665e3e349dc82c88bcbbc020e394669c9829e68666a4db8e097464539aaddc38f67cc3197004265b160e9cc19aa01a0d0a4ce977
SSDEEP

1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9x:C4Q2c94OtEvwDpj4H8zo

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3056-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000600000002296e-13.dat	CryptoLocker_rule2
behavioral2/memory/3056-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4992-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4992-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/3056-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4992-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4992-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3056-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000600000002296e-13.dat	UPX
behavioral2/memory/3056-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4992-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4992-27-0x0000000000500000-0x0000000000510000-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-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	2024-04-25_5c2c1f3e3e73c3f9a0d53087646e8b90_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4992	misid.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3056-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000600000002296e-13.dat	upx
behavioral2/memory/3056-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4992-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4992-27-0x0000000000500000-0x0000000000510000-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 3056 wrote to memory of 4992	3056	2024-04-25_5c2c1f3e3e73c3f9a0d53087646e8b90_cryptolocker.exe	88
PID 3056 wrote to memory of 4992	3056	2024-04-25_5c2c1f3e3e73c3f9a0d53087646e8b90_cryptolocker.exe	88
PID 3056 wrote to memory of 4992	3056	2024-04-25_5c2c1f3e3e73c3f9a0d53087646e8b90_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-04-25_5c2c1f3e3e73c3f9a0d53087646e8b90_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-25_5c2c1f3e3e73c3f9a0d53087646e8b90_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3056
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:4992

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\misid.exe

Filesize
70KB

MD5
9615c4bdc63547d6a71ece08e118d0b1

SHA1
856012303d2aefc1a74eea0aaa93a21c9ac4cd3a

SHA256
d5fe814ecdeca982649943832903b0c583e356d4556600ca5c86f50e3c3423e5

SHA512
5edddabd818efcfcc387ca51f9c3eb516f4985b1e09c279092088f759ac9b1b4fbc18ce36a9c9e7a3d4ebd9288376daeefa27fe80b2982fb44c25bdc80677a49

Download Submit
memory/3056-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3056-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/3056-2-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/3056-3-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/3056-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4992-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4992-20-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/4992-22-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/4992-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download