31f9868f7fa6240915397545e128dcab2afd24aaa2150beb8e83dc0efb09a817

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28-02-2024 21:38

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General

Target

2024-02-28_ae768995240257efeb2a1d3690f1015a_cryptolocker.exe
Size

56KB
MD5

ae768995240257efeb2a1d3690f1015a
SHA1

2122e99729c9a152b9d83e142c233e4cb3b6a171
SHA256

31f9868f7fa6240915397545e128dcab2afd24aaa2150beb8e83dc0efb09a817
SHA512

2b4f651bf5a097026bd344a2db280f998b11ed3cdf95569d166f1c2104f9e10cd9f4dbf65e1b6c85037e77dfdc93ac5ea9867b1f59028a2415b252d145004639
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5axcE9G3:z6QFElP6n+gKmddpMOtEvwDpj9aYa59G

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4496-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002322e-13.dat	CryptoLocker_rule2
behavioral2/memory/4496-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2188-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4496-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002322e-13.dat	CryptoLocker_set1
behavioral2/memory/4496-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2188-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4496-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002322e-13.dat	UPX
behavioral2/memory/4496-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2188-26-0x0000000000500000-0x0000000000510000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-02-28_ae768995240257efeb2a1d3690f1015a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2188	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4496-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000800000002322e-13.dat	upx
behavioral2/memory/4496-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2188-26-0x0000000000500000-0x0000000000510000-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 4496 wrote to memory of 2188	4496	2024-02-28_ae768995240257efeb2a1d3690f1015a_cryptolocker.exe	87
PID 4496 wrote to memory of 2188	4496	2024-02-28_ae768995240257efeb2a1d3690f1015a_cryptolocker.exe	87
PID 4496 wrote to memory of 2188	4496	2024-02-28_ae768995240257efeb2a1d3690f1015a_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-02-28_ae768995240257efeb2a1d3690f1015a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_ae768995240257efeb2a1d3690f1015a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4496
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2188

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
56KB

MD5
d0234bd0505a55a4050e8d2e16b202c7

SHA1
826a0bcfcf7eab17cf5f4faee96f6f4102eb6709

SHA256
4278e44e7cd5f9729598983bd8e00031a798dd4df579e44db74f0f8e13b590bd

SHA512
31f239a77d5ae668a4ee6e51d7ea02f30949420d9bfa529bb907c7b7b68f6ff7ba0aa88a696fccc7e0366f535dce514c6b1f57627ee3cd19e51465c0705cc3f0

Download Submit
memory/2188-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2188-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2188-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4496-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4496-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4496-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4496-3-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4496-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download