837ff8a578e71650581f73167237c2e62cf4bbfd18bd253ef08e260dfc4fbdf4

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
30/05/2024, 04:29

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General

Target

2024-05-30_e09dd4bee54fc244314008996c650fc4_cryptolocker.exe
Size

39KB
MD5

e09dd4bee54fc244314008996c650fc4
SHA1

e243989272f813a393f8cb8554eb5e5e230486c6
SHA256

837ff8a578e71650581f73167237c2e62cf4bbfd18bd253ef08e260dfc4fbdf4
SHA512

7c77657d0b79c14fbb3349b3638e77004bd181315a8ab4df1a486450cd2b0448e63f2a55b4f06595a8a644c1bdb9385003f211b71304512ec805c74eb3c6c24c
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5axK38noyj:qUmnpomddpMOtEvwDpjjaYaQ8J

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3016-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00050000000232a4-13.dat	CryptoLocker_rule2
behavioral2/memory/2656-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3016-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2656-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3016-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00050000000232a4-13.dat	CryptoLocker_set1
behavioral2/memory/2656-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3016-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2656-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3016-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x00050000000232a4-13.dat	UPX
behavioral2/memory/2656-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3016-19-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2656-28-0x0000000000500000-0x000000000050F000-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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	2024-05-30_e09dd4bee54fc244314008996c650fc4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2656	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3016-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x00050000000232a4-13.dat	upx
behavioral2/memory/2656-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3016-19-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2656-28-0x0000000000500000-0x000000000050F000-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 3016 wrote to memory of 2656	3016	2024-05-30_e09dd4bee54fc244314008996c650fc4_cryptolocker.exe	83
PID 3016 wrote to memory of 2656	3016	2024-05-30_e09dd4bee54fc244314008996c650fc4_cryptolocker.exe	83
PID 3016 wrote to memory of 2656	3016	2024-05-30_e09dd4bee54fc244314008996c650fc4_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-30_e09dd4bee54fc244314008996c650fc4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-30_e09dd4bee54fc244314008996c650fc4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3016
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2656

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
39KB

MD5
fe12eb1948642955248b9675ac6b9a90

SHA1
225e0acd0f93b4b467696f7661e19fa7957675f3

SHA256
ef5c29ef8dea9e3e02a84ac900cfa320b4980f37beb629e319319eb03b0a71bc

SHA512
a5e8b3e428378e23f39570c644b45474beaf6cc300820b925ea96e7689caa67035757858b2aacc16a1ce7e1833ba3b6ea02ab3a69f736e49b792cc737f69269d

Download Submit
memory/2656-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2656-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2656-27-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2656-28-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3016-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3016-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3016-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/3016-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3016-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download