3a717c95aa83637439965da0e9621550b52f2059feb4f1dd2e3f1c9c1cac6623

Analysis

max time kernel
145s
max time network
163s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
24-06-2024 18:24

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General

Target

2024-06-24_0a3a79c2b5ab709aea28d8234c94c6a2_cryptolocker.exe
Size

92KB
MD5

0a3a79c2b5ab709aea28d8234c94c6a2
SHA1

5cc00270403aae675665bcad36dcfdf905439493
SHA256

3a717c95aa83637439965da0e9621550b52f2059feb4f1dd2e3f1c9c1cac6623
SHA512

15b1811e157f46e470286212b1c9cc7eaa95eaf19bf7fe5d28cf8e1e3c9b27a1391444645f00f962bf0d78aedbb65975ee0c67fde8b6095cf9abbda99852e48f
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgddBK:AnBdOOtEvwDpj6zM

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3264-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3264-10-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002325f-14.dat	CryptoLocker_rule2
behavioral2/memory/4580-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3264-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3264-10-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000900000002325f-14.dat	CryptoLocker_set1
behavioral2/memory/4580-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3264-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3264-10-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000900000002325f-14.dat	UPX
behavioral2/memory/4580-27-0x0000000000500000-0x000000000050F000-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	2024-06-24_0a3a79c2b5ab709aea28d8234c94c6a2_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4580	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3264-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3264-10-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000900000002325f-14.dat	upx
behavioral2/memory/4580-27-0x0000000000500000-0x000000000050F000-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 3264 wrote to memory of 4580	3264	2024-06-24_0a3a79c2b5ab709aea28d8234c94c6a2_cryptolocker.exe	91
PID 3264 wrote to memory of 4580	3264	2024-06-24_0a3a79c2b5ab709aea28d8234c94c6a2_cryptolocker.exe	91
PID 3264 wrote to memory of 4580	3264	2024-06-24_0a3a79c2b5ab709aea28d8234c94c6a2_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-06-24_0a3a79c2b5ab709aea28d8234c94c6a2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-24_0a3a79c2b5ab709aea28d8234c94c6a2_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3264
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4580

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=3456 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8
1⤵
PID:3888

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
92KB

MD5
bfc6d18db6dc59f9e97bdb21bf1041e4

SHA1
bd3c9bb5edfa2cf899b20b9a60d997104ec3b980

SHA256
df19691edfc835747af86b73a925588ead15a4faa07e29128e4e31dd9f6035e1

SHA512
56714625af8a30b51a2efcdfb1eabbc8c6c3863c88ab7e3517a1c430ea01c16b3fb6cfb80ac48653ce57a8a2485e046500d4864640c87a65a4995d60a875aff8

Download Submit
memory/3264-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3264-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3264-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3264-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3264-10-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4580-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download