99b47830c57faa42e3b0bd98db002b0d4765ca5a74652d4290990bf6a16d20aa

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
15/04/2024, 10:04

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General

Target

2024-04-15_a49070c3b9de1c3bbc010535e195647e_cryptolocker.exe
Size

78KB
MD5

a49070c3b9de1c3bbc010535e195647e
SHA1

c0e03b55072b1100b5aff63059e492a0f18b2fac
SHA256

99b47830c57faa42e3b0bd98db002b0d4765ca5a74652d4290990bf6a16d20aa
SHA512

e2bb4e416f3a89e3d9322aedd3b8d668a3b7bac4b65670226114aeba2276ad35b4c6d6af8efad672e6dab64d8bd2dcf88251a1ddb7f1461c2d76b5d5eec7daba
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOA+YSafiPuqI:T6a+rdOOtEvwDpjNcT

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4032-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_rule2
behavioral2/memory/4032-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2412-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4032-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_set1
behavioral2/memory/4032-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2412-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4032-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x001c00000001e97e-13.dat	UPX
behavioral2/memory/4032-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2412-26-0x0000000000500000-0x0000000000510000-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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	2024-04-15_a49070c3b9de1c3bbc010535e195647e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2412	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4032-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x001c00000001e97e-13.dat	upx
behavioral2/memory/4032-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2412-26-0x0000000000500000-0x0000000000510000-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 4032 wrote to memory of 2412	4032	2024-04-15_a49070c3b9de1c3bbc010535e195647e_cryptolocker.exe	91
PID 4032 wrote to memory of 2412	4032	2024-04-15_a49070c3b9de1c3bbc010535e195647e_cryptolocker.exe	91
PID 4032 wrote to memory of 2412	4032	2024-04-15_a49070c3b9de1c3bbc010535e195647e_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-15_a49070c3b9de1c3bbc010535e195647e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_a49070c3b9de1c3bbc010535e195647e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4032
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2412

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
78KB

MD5
0ed5022821ee282ceb88088af843e5f5

SHA1
9054edd017d4f17e50f53f22e9639e5c99f65690

SHA256
c0c6d6820899b1969f497697af9d5668fef7977e175109aaeb818c95f87a23f3

SHA512
ff53115454489cc0803c1ed209891749521a925a07fdc79c29359642dc1d2d47bd34de49075f763d6b401625dfd74ba10d7aa563c4c51e12447cc94a205907ef

Download Submit
memory/2412-25-0x0000000000550000-0x0000000000556000-memory.dmp

Filesize
24KB

Download
memory/2412-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4032-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4032-1-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/4032-2-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/4032-3-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/4032-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download