a4e0babe37ab49001c39af7ba793ce1403854d0c048003d7db7efa775393bae5

Analysis

max time kernel
144s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
24/04/2024, 15:23

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General

Target

2024-04-24_2a9a7f59c5467e5adc9a2059183023e1_cryptolocker.exe
Size

89KB
MD5

2a9a7f59c5467e5adc9a2059183023e1
SHA1

92eeb4d997a26d770cf954e04de833b1f91eafd3
SHA256

a4e0babe37ab49001c39af7ba793ce1403854d0c048003d7db7efa775393bae5
SHA512

ed7b21dac21f51bd17646b6a21d6a874ced1129f51e14f560abec4ef186ca066c383511fe535420d71d934947142b7b8e899a0f7c526f885d80b3eb08994f2d4
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAAn:n6a+1SEOtEvwDpjYYvQd2P4

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3400-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023247-13.dat	CryptoLocker_rule2
behavioral2/memory/3400-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4688-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3400-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023247-13.dat	CryptoLocker_set1
behavioral2/memory/3400-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4688-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3400-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023247-13.dat	UPX
behavioral2/memory/3400-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4688-26-0x0000000000500000-0x0000000000510000-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	2024-04-24_2a9a7f59c5467e5adc9a2059183023e1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4688	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3400-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023247-13.dat	upx
behavioral2/memory/3400-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4688-26-0x0000000000500000-0x0000000000510000-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 3400 wrote to memory of 4688	3400	2024-04-24_2a9a7f59c5467e5adc9a2059183023e1_cryptolocker.exe	91
PID 3400 wrote to memory of 4688	3400	2024-04-24_2a9a7f59c5467e5adc9a2059183023e1_cryptolocker.exe	91
PID 3400 wrote to memory of 4688	3400	2024-04-24_2a9a7f59c5467e5adc9a2059183023e1_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-24_2a9a7f59c5467e5adc9a2059183023e1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_2a9a7f59c5467e5adc9a2059183023e1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3400
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4688

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=3972 --field-trial-handle=2900,i,14549994492153927475,12895178890800740987,262144 --variations-seed-version /prefetch:8
1⤵
PID:4132

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
89KB

MD5
282e113fa86213e867b62d2126ef906b

SHA1
dd10812366d94971cac71f508beadeffa4de9cd4

SHA256
542d4ccf26e418730b19b7563bdb210dfc42c6934910f4a6465c616582b8685d

SHA512
eb93e0f5ace4d3c892432a3e633a560c5754fe69820747d855adec140bda13054bed6c8245ee3272bb7b828c024f75743c4d43e4e27f772f25c87a964f4568c3

Download Submit
memory/3400-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3400-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3400-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3400-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/3400-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4688-19-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/4688-20-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/4688-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download