bfb98a0d6c5e754eb0d1cd166b7444918e852cced00f145ebdefda97deb93d71

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
25/05/2024, 08:24

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General

Target

2024-05-25_08b5fd877be4ce7169d5d554f9f6b2fc_cryptolocker.exe
Size

74KB
MD5

08b5fd877be4ce7169d5d554f9f6b2fc
SHA1

efd2e33c83fbe7d07bf7314e2c3bb1b66692c7a2
SHA256

bfb98a0d6c5e754eb0d1cd166b7444918e852cced00f145ebdefda97deb93d71
SHA512

701d5e50720e5a93525a277db6e9c8dca59c18805323715aaa5a76c0acd3b78bb4ccc7fc456432762320c5ff59867324ed285721a7bee0b30dd9d1bc39bda1f7
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal81G7:1nK6a+qdOOtEvwDpjK

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1788-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023547-13.dat	CryptoLocker_rule2
behavioral2/memory/1788-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/404-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/404-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1788-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000023547-13.dat	CryptoLocker_set1
behavioral2/memory/1788-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/404-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/404-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1788-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0009000000023547-13.dat	UPX
behavioral2/memory/1788-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/404-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/404-27-0x0000000000500000-0x000000000050F311-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-25_08b5fd877be4ce7169d5d554f9f6b2fc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
404	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1788-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0009000000023547-13.dat	upx
behavioral2/memory/1788-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/404-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/404-27-0x0000000000500000-0x000000000050F311-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

description	pid	Process	procid_target
PID 1788 wrote to memory of 404	1788	2024-05-25_08b5fd877be4ce7169d5d554f9f6b2fc_cryptolocker.exe	90
PID 1788 wrote to memory of 404	1788	2024-05-25_08b5fd877be4ce7169d5d554f9f6b2fc_cryptolocker.exe	90
PID 1788 wrote to memory of 404	1788	2024-05-25_08b5fd877be4ce7169d5d554f9f6b2fc_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-05-25_08b5fd877be4ce7169d5d554f9f6b2fc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-25_08b5fd877be4ce7169d5d554f9f6b2fc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1788
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:404

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 --field-trial-handle=4612,i,16710585221322798697,8586257254049248207,262144 --variations-seed-version --mojo-platform-channel-handle=4432 /prefetch:8
1⤵
PID:2932

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
75KB

MD5
b5d7ee1538cb265f6e74b3b6540ab5fe

SHA1
08e52d11735759b99a43bc6be898aab92e2a34e8

SHA256
93bf6020fb7b7587031bb77b43242af95ecba2bc79b0c16c5a9d235e8f7e737e

SHA512
c91869c78d8a68f48fe8640a312ff0028a9cfea3bf4c8e7d05d1f975c258723ffdea6a50c7231faf9ec103b5aefa404306ea2fdc3d9e5c78a59b7791459e40c2

Download Submit
memory/404-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/404-21-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/404-20-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/404-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1788-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1788-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1788-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1788-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1788-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download