1fe5b98c5573e3ae91b607360795a6829b2b9dcc0110e925ee44f71c713a6d71

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
18/04/2024, 05:40

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General

Target

2024-04-18_8c08d733a231c2dddef20925204accbe_cryptolocker.exe
Size

62KB
MD5

8c08d733a231c2dddef20925204accbe
SHA1

ca39df62bb713e9400e807cd8a6f5e3c706fb149
SHA256

1fe5b98c5573e3ae91b607360795a6829b2b9dcc0110e925ee44f71c713a6d71
SHA512

d05c48c1c5f3c11329a1c6f839a8cc8b6b1d30f39d54bd40cfdd3e9cb6e1754a68b432d56d361e96732c708db0a126d893710c7d5362cd5900b1af07bee9a164
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsit:BbdDmjr+OtEvwDpjM80

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2448-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000600000002326c-13.dat	CryptoLocker_rule2
behavioral2/memory/2448-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1152-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/2448-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1152-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2448-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000600000002326c-13.dat	UPX
behavioral2/memory/2448-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1152-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1132431369-515282257-1998160155-1000\Control Panel\International\Geo\Nation	2024-04-18_8c08d733a231c2dddef20925204accbe_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1152	asih.exe

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 2448 wrote to memory of 1152	2448	2024-04-18_8c08d733a231c2dddef20925204accbe_cryptolocker.exe	83
PID 2448 wrote to memory of 1152	2448	2024-04-18_8c08d733a231c2dddef20925204accbe_cryptolocker.exe	83
PID 2448 wrote to memory of 1152	2448	2024-04-18_8c08d733a231c2dddef20925204accbe_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-04-18_8c08d733a231c2dddef20925204accbe_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-18_8c08d733a231c2dddef20925204accbe_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2448
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1152

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
62KB

MD5
e5714fa7cc6b038cab8d5cfa2196d630

SHA1
25c7d6b3458651991c498ecf7e81559c683bd96b

SHA256
2794de4b4393d88340ce900fe5c466e2c291a6551f6b6097425bae17fe28b97c

SHA512
ac34483c69a596cb01045ee28dad6deaecc3bd776ee5ff2dca64a9392f8541c194f4202eda23f58049c357ccf7e824a129ecc58d68c1975d91606e283fd9edad

Download Submit
memory/1152-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1152-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1152-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2448-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2448-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/2448-2-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/2448-3-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/2448-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download