0e09edc761dce03594d69d988f484f3b82d34a67167eb06943c32bef5d613c0c

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
03/05/2024, 03:38

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General

Target

2024-05-03_5f3062284b72522a3db81bbeb9f4f781_cryptolocker.exe
Size

77KB
MD5

5f3062284b72522a3db81bbeb9f4f781
SHA1

efbb8885fac329fd7aca63fe56390d67be27215e
SHA256

0e09edc761dce03594d69d988f484f3b82d34a67167eb06943c32bef5d613c0c
SHA512

2cc05331fab3351a4721b66eda27f69ada0d9686cfd5e159dce5c2ca689d84d422d3c44c01dd633f18e7d7e6c525d394e915f8acaac24037352d5f7526ab0179
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxnH:T6a+rdOOtEvwDpjNtHPo

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4500-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023b2a-13.dat	CryptoLocker_rule2
behavioral2/memory/4500-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4384-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4500-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000d000000023b2a-13.dat	CryptoLocker_set1
behavioral2/memory/4500-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4384-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4500-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000d000000023b2a-13.dat	UPX
behavioral2/memory/4500-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4384-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation	2024-05-03_5f3062284b72522a3db81bbeb9f4f781_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4384	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4500-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000d000000023b2a-13.dat	upx
behavioral2/memory/4500-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4384-26-0x0000000000500000-0x0000000000510000-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 4500 wrote to memory of 4384	4500	2024-05-03_5f3062284b72522a3db81bbeb9f4f781_cryptolocker.exe	83
PID 4500 wrote to memory of 4384	4500	2024-05-03_5f3062284b72522a3db81bbeb9f4f781_cryptolocker.exe	83
PID 4500 wrote to memory of 4384	4500	2024-05-03_5f3062284b72522a3db81bbeb9f4f781_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-03_5f3062284b72522a3db81bbeb9f4f781_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_5f3062284b72522a3db81bbeb9f4f781_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4500
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4384

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
77KB

MD5
b6bc9213ae1239892bec2b4692ac8e2d

SHA1
8961cd664087780f7d58f517e317c203199a4f31

SHA256
997b47c85c3911c02d22159fec187a0b99f708fc28b9f856a81082293b19cc7d

SHA512
c24e06258880b0ade8076adcd6ab4cbe10a68f7f729fb567d3b9cb6278a8b9c167613a1278d52d3d7c62f4813aa07230af1f83c989dd56c59045a8b6c84e760d

Download Submit
memory/4384-19-0x0000000000770000-0x0000000000776000-memory.dmp

Filesize
24KB

Download
memory/4384-25-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4384-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4500-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4500-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4500-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4500-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4500-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download