acd21330821937a8e5c830cb1d6b396a085962870b23df696783cd67096216ec

Analysis

max time kernel
124s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
14/05/2024, 04:30

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General

Target

2024-05-14_48a2b4ded03f37a671ba06eeca645455_cryptolocker.exe
Size

51KB
MD5

48a2b4ded03f37a671ba06eeca645455
SHA1

e7242e42b4cc9b27356b179c35f99fb680777372
SHA256

acd21330821937a8e5c830cb1d6b396a085962870b23df696783cd67096216ec
SHA512

cfb66f5df7988307b5f47812e7c52b10fee641ad02e7603a2330f86b1c41ab5bd97764126def62a5d1fdd08d172fde3c7cf4196116a3ff9ab24a1b2009d74ab0
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOL:bODOw9acifAoc+v4

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4800-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023288-13.dat	CryptoLocker_rule2
behavioral2/memory/3516-18-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4800-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3516-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4800-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x0006000000023288-13.dat	UPX
behavioral2/memory/3516-18-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/4800-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/3516-27-0x0000000008000000-0x000000000800F000-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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2024-05-14_48a2b4ded03f37a671ba06eeca645455_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3516	lossy.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4800-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x0006000000023288-13.dat	upx
behavioral2/memory/3516-18-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/4800-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/3516-27-0x0000000008000000-0x000000000800F000-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 4800 wrote to memory of 3516	4800	2024-05-14_48a2b4ded03f37a671ba06eeca645455_cryptolocker.exe	82
PID 4800 wrote to memory of 3516	4800	2024-05-14_48a2b4ded03f37a671ba06eeca645455_cryptolocker.exe	82
PID 4800 wrote to memory of 3516	4800	2024-05-14_48a2b4ded03f37a671ba06eeca645455_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-14_48a2b4ded03f37a671ba06eeca645455_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-14_48a2b4ded03f37a671ba06eeca645455_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4800
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:3516

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\lossy.exe

Filesize
52KB

MD5
da2a7c383493e53e46c2c54b896021a9

SHA1
0c3e80c1703270146f715c4224c0b3045af0b3a8

SHA256
9a35c7da03cafc1f4e762450c6ddc636b500539e7a812b8342d8043590b5f5ba

SHA512
82de20dab6730b2dc14c968ab6eddaa1a10fb6c7373c12e773fbad723d76034f6fcab2e8d1d8d1b86c870444836034f5679540cb86e9d71bde199183af096b26

Download Submit
memory/3516-20-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3516-26-0x0000000002130000-0x0000000002136000-memory.dmp

Filesize
24KB

Download
memory/3516-18-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3516-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4800-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4800-9-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4800-2-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/4800-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4800-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download