7b8a4bc6e57e167df540340234f3b9cc2168b72899d840263d2149f7147f5c19

Analysis

max time kernel
148s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 04:25

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General

Target

2024-05-24_2d651969e61737bcbb3fb3cb037915fc_cryptolocker.exe
Size

64KB
MD5

2d651969e61737bcbb3fb3cb037915fc
SHA1

084c0015f292c7b6e3dd1a94d5104285df6ed4fd
SHA256

7b8a4bc6e57e167df540340234f3b9cc2168b72899d840263d2149f7147f5c19
SHA512

78bfd1ec8d13c6292f74f3ff65d775f700f7542bf6c76974356228bc659495a45f0a971fda52a591363f19cb60bd954e34a8ee7c6481e8e58b8f365cf5c3a3fd
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8xDwY:1nK6a+qdOOtEvwDpjn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4992-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4992-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1292-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4992-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4992-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/1292-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4992-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4992-25-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/1292-26-0x0000000000500000-0x000000000050F311-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

Processes:

2024-05-24_2d651969e61737bcbb3fb3cb037915fc_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-24_2d651969e61737bcbb3fb3cb037915fc_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1292 asih.exe

pid	process
1292	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4992-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4992-25-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/1292-26-0x0000000000500000-0x000000000050F311-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

Processes:

2024-05-24_2d651969e61737bcbb3fb3cb037915fc_cryptolocker.exe

description	pid	process	target process
PID 4992 wrote to memory of 1292	4992	2024-05-24_2d651969e61737bcbb3fb3cb037915fc_cryptolocker.exe	asih.exe
PID 4992 wrote to memory of 1292	4992	2024-05-24_2d651969e61737bcbb3fb3cb037915fc_cryptolocker.exe	asih.exe
PID 4992 wrote to memory of 1292	4992	2024-05-24_2d651969e61737bcbb3fb3cb037915fc_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_2d651969e61737bcbb3fb3cb037915fc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_2d651969e61737bcbb3fb3cb037915fc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4992
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1292

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=4192 --field-trial-handle=2276,i,5697607538120380977,9987005253899555344,262144 --variations-seed-version /prefetch:8
1⤵
PID:4928

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
65KB

MD5
90a1aa893c82ef39d2d3d11f8054c3de

SHA1
d4e8050785856cd4b8a62a32ab2cd2ed0725ae27

SHA256
0b3e9a50aa5a526f61aa10aa08f7de243bf8e5f4af44edfdfeb75278846ce28e

SHA512
375b604904feae09feec3619517a7266b8b00e1485613820b7d39b1b16a71fe17698bef857186935ba9c6576d05596e7b422987bc7d9c78ab3be3b4850692e0b

Download Submit
memory/1292-18-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1292-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/1292-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4992-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4992-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4992-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4992-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4992-25-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download