954a5abdffbb11f0fa42390028c8d917253320cd3ea386dc865b6e785db44107

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
20/04/2024, 03:25

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General

Target

2024-04-20_0882fc70e3e597ec10ac16955d65eeb9_cryptolocker.exe
Size

93KB
MD5

0882fc70e3e597ec10ac16955d65eeb9
SHA1

8bff8ba8b9395abf0907387d9dc0bf3b557fb8d3
SHA256

954a5abdffbb11f0fa42390028c8d917253320cd3ea386dc865b6e785db44107
SHA512

0e5fd5c14cf4a1bcde30206d19f8c267fa3a02555b10e5030e10113a04d8d60f86150543c3927eab31d7c612ef19ded3b63911bf714f3c0e2080f0ab40de1ccb
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/1H:zCsanOtEvwDpjBN

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2500-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e97a-13.dat	CryptoLocker_rule2
behavioral2/memory/2500-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3556-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2500-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e97a-13.dat	CryptoLocker_set1
behavioral2/memory/2500-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3556-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2500-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000001e97a-13.dat	UPX
behavioral2/memory/2500-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3556-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	2024-04-20_0882fc70e3e597ec10ac16955d65eeb9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3556	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2500-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000300000001e97a-13.dat	upx
behavioral2/memory/2500-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3556-26-0x0000000000500000-0x0000000000510000-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 2500 wrote to memory of 3556	2500	2024-04-20_0882fc70e3e597ec10ac16955d65eeb9_cryptolocker.exe	85
PID 2500 wrote to memory of 3556	2500	2024-04-20_0882fc70e3e597ec10ac16955d65eeb9_cryptolocker.exe	85
PID 2500 wrote to memory of 3556	2500	2024-04-20_0882fc70e3e597ec10ac16955d65eeb9_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-20_0882fc70e3e597ec10ac16955d65eeb9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_0882fc70e3e597ec10ac16955d65eeb9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2500
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:3556

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
93KB

MD5
d93c25cbcd4a994ef56572146b386079

SHA1
26630ac84b2bafad17c913e49fbe9136d13c9d63

SHA256
3431c369c143ee02a8762a6122cc4c6afb1faecc0be9cb6060f4d023126de3da

SHA512
873a227523749e831a1d26c90fa2a6a86aea011486084848f8dd162a8fa25cf409653b3f733695f012bfa14e098228f55933e30a3ee21102777bca14753be0be

Download Submit
memory/2500-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2500-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2500-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2500-3-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/2500-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3556-19-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/3556-21-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/3556-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download