f0c00d222d8add24eb4e65f7da97f6326ca7df1a17e93a291d182c0344cee41c

Analysis

max time kernel
154s
max time network
167s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
20/03/2024, 00:42

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General

Target

2024-03-20_72007eec410507248db359d818a6929a_cryptolocker.exe
Size

57KB
MD5

72007eec410507248db359d818a6929a
SHA1

aa934f15bc6298cbc34d79761e1be9918e20cb10
SHA256

f0c00d222d8add24eb4e65f7da97f6326ca7df1a17e93a291d182c0344cee41c
SHA512

7fc0fd2d48c8fb8553912fe7c136f76ad70fd6abedd6349c09aaf1437c5bbcaa54c25678cc008d14258bbdc8e8aa3f66a06bcd30bf0fee629233cf746bbe8744
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5axcE9Gz:z6QFElP6n+gKmddpMOtEvwDpj9aYa59a

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/876-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002326b-13.dat	CryptoLocker_rule2
behavioral2/memory/876-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4888-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/876-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002326b-13.dat	CryptoLocker_set1
behavioral2/memory/876-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4888-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/876-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002326b-13.dat	UPX
behavioral2/memory/876-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4888-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-03-20_72007eec410507248db359d818a6929a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4888	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/876-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000800000002326b-13.dat	upx
behavioral2/memory/876-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4888-26-0x0000000000500000-0x0000000000510000-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 876 wrote to memory of 4888	876	2024-03-20_72007eec410507248db359d818a6929a_cryptolocker.exe	100
PID 876 wrote to memory of 4888	876	2024-03-20_72007eec410507248db359d818a6929a_cryptolocker.exe	100
PID 876 wrote to memory of 4888	876	2024-03-20_72007eec410507248db359d818a6929a_cryptolocker.exe	100

C:\Users\Admin\AppData\Local\Temp\2024-03-20_72007eec410507248db359d818a6929a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-20_72007eec410507248db359d818a6929a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:876
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4888

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=5164 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8
1⤵
PID:1496

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
57KB

MD5
97b45cfbf3349c0e47cfe55d920eb90e

SHA1
0b25bc98275979503cd92dbfd47e0d6b64b35cc7

SHA256
53e61ecb375790f8acfdff9f61497184b34ae832b9a693fc8f0caea8155edce3

SHA512
510426ba79a3e81762c6b37490f442f2fe8289df7979027ddfb9c8b75ef77434d337a7ebac967d319882a69446b8552920aa0e3c8447759f48afb6e0154a0405

Download Submit
memory/876-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/876-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/876-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/876-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/876-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4888-18-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4888-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4888-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download