999279437b25f2967e11ef7ef9042a368d2701e596ac8fb2bbf139ef7ccba4ac

Analysis

max time kernel
148s
max time network
152s
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, 03:49

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General

Target

2024-05-25_53a5f7bbbe48c36ebc9b151627aec2f3_cryptolocker.exe
Size

89KB
MD5

53a5f7bbbe48c36ebc9b151627aec2f3
SHA1

e1d1f445cc66ded01362fdba3ac2fd60ae4290b6
SHA256

999279437b25f2967e11ef7ef9042a368d2701e596ac8fb2bbf139ef7ccba4ac
SHA512

cc604995d71c11a79f9e9e620062e6451d97a32b9b343adaece32eb9e450f38d91dc47e867ddca4b76b8af03ae38d45de66dd096534f5742c87507a69d970578
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgiD:AnBdOOtEvwDpj6zY

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4292-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000235ad-13.dat	CryptoLocker_rule2
behavioral2/memory/4632-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4292-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4632-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4292-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00090000000235ad-13.dat	CryptoLocker_set1
behavioral2/memory/4632-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4292-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4632-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4292-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x00090000000235ad-13.dat	UPX
behavioral2/memory/4632-19-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4292-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4632-28-0x0000000000500000-0x000000000050F000-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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-25_53a5f7bbbe48c36ebc9b151627aec2f3_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4632	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4292-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x00090000000235ad-13.dat	upx
behavioral2/memory/4632-19-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4292-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4632-28-0x0000000000500000-0x000000000050F000-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 4292 wrote to memory of 4632	4292	2024-05-25_53a5f7bbbe48c36ebc9b151627aec2f3_cryptolocker.exe	90
PID 4292 wrote to memory of 4632	4292	2024-05-25_53a5f7bbbe48c36ebc9b151627aec2f3_cryptolocker.exe	90
PID 4292 wrote to memory of 4632	4292	2024-05-25_53a5f7bbbe48c36ebc9b151627aec2f3_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-05-25_53a5f7bbbe48c36ebc9b151627aec2f3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-25_53a5f7bbbe48c36ebc9b151627aec2f3_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4292
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4632

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=1428,i,6576818814118437872,11004518367271063231,262144 --variations-seed-version --mojo-platform-channel-handle=4088 /prefetch:8
1⤵
PID:1720

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
89KB

MD5
23638335c339a0194ea3b72ed79797f8

SHA1
1d25e77f03b2b810f029830a7a811b3263135bf0

SHA256
86d3947c536f1f72c8ae87c8de04723b4d4d47e3ae245b7422d9097481fbc2d8

SHA512
121d1c3d095c124a3bc406e93521deae07a925e8bb776cf99f7da46e2a93727fb0d0cb80227dcc2f7ed63661eda23a39fadba36329cfcae49769377012de58fe

Download Submit
memory/4292-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4292-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4292-2-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4292-9-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4292-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4632-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4632-21-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/4632-27-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4632-28-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download