ad68dd19be158d8652974384cd0d6a56fde508c690ce006d05c25d41baf3c7af

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
09/06/2024, 05:28

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General

Target

2024-06-09_2f1e3d235c06cb94504fd3e9d2f84de8_cryptolocker.exe
Size

54KB
MD5

2f1e3d235c06cb94504fd3e9d2f84de8
SHA1

e67dd8d0bbebbbd144f278fa3cb1ea24372cc40e
SHA256

ad68dd19be158d8652974384cd0d6a56fde508c690ce006d05c25d41baf3c7af
SHA512

d1205946da4deeffe4c7e66e26b76d8afedbe5691bea92ee31d0f61e477aae4820ece4ea3aa95070361c8fcca07f53c5d1a71dd326e2d7bb0aa306b9e87243b8
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOE:z6QFElP6n+gKmddpMOtEvwDpj31iE

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3692-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000233fa-13.dat	CryptoLocker_rule2
behavioral2/memory/3692-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4416-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3692-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00090000000233fa-13.dat	CryptoLocker_set1
behavioral2/memory/3692-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4416-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3692-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00090000000233fa-13.dat	UPX
behavioral2/memory/3692-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4416-26-0x0000000000500000-0x0000000000510000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-06-09_2f1e3d235c06cb94504fd3e9d2f84de8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4416	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3692-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00090000000233fa-13.dat	upx
behavioral2/memory/3692-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4416-26-0x0000000000500000-0x0000000000510000-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 3692 wrote to memory of 4416	3692	2024-06-09_2f1e3d235c06cb94504fd3e9d2f84de8_cryptolocker.exe	82
PID 3692 wrote to memory of 4416	3692	2024-06-09_2f1e3d235c06cb94504fd3e9d2f84de8_cryptolocker.exe	82
PID 3692 wrote to memory of 4416	3692	2024-06-09_2f1e3d235c06cb94504fd3e9d2f84de8_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-09_2f1e3d235c06cb94504fd3e9d2f84de8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-09_2f1e3d235c06cb94504fd3e9d2f84de8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3692
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4416

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
54KB

MD5
4af5123814196ac72fd8f33db1a06126

SHA1
5f92dc066efc93df87146778c348faf3989ef648

SHA256
eeb7b5d36afb45d0f75f260c9615a387c4cc54a758457fb3c8090303e25ec16e

SHA512
a6de0c358e24984b8f3773f60f1cc4b361ec54837b807767edb8a57a4b8ff8566ec05f37f10e3017cf2a21fb128b05f8d2c7e804355d4ea72a3777b2dc466bb6

Download Submit
memory/3692-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3692-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3692-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3692-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3692-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4416-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4416-25-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4416-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download