77ef06717dac1881f01257a934ce9637fc8fff5064c6c9dea020a322dfd38d44

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27-03-2024 12:38

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General

Target

2024-03-27_78ff471af50625d58eceabfd094ad5de_cryptolocker.exe
Size

127KB
MD5

78ff471af50625d58eceabfd094ad5de
SHA1

534842503d33e4e70c229cc0606c0796c7b01132
SHA256

77ef06717dac1881f01257a934ce9637fc8fff5064c6c9dea020a322dfd38d44
SHA512

3f2300f3622d283dfb24d3aa47473664a0f992bd53ad38513117495f645a08eac7cb7c90ee0d7d2032b74a4fd7ee4c353ef4638feb300c2a0dd0dc4907ca10b0
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1ebbS:AnBdOOtEvwDpj6z8

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/228-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002325b-13.dat	CryptoLocker_rule2
behavioral2/memory/228-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4616-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/228-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002325b-13.dat	CryptoLocker_set1
behavioral2/memory/228-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4616-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/228-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000800000002325b-13.dat	UPX
behavioral2/memory/228-25-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4616-26-0x0000000000500000-0x000000000050F000-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	2024-03-27_78ff471af50625d58eceabfd094ad5de_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4616	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/228-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000800000002325b-13.dat	upx
behavioral2/memory/228-25-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4616-26-0x0000000000500000-0x000000000050F000-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 228 wrote to memory of 4616	228	2024-03-27_78ff471af50625d58eceabfd094ad5de_cryptolocker.exe	96
PID 228 wrote to memory of 4616	228	2024-03-27_78ff471af50625d58eceabfd094ad5de_cryptolocker.exe	96
PID 228 wrote to memory of 4616	228	2024-03-27_78ff471af50625d58eceabfd094ad5de_cryptolocker.exe	96

C:\Users\Admin\AppData\Local\Temp\2024-03-27_78ff471af50625d58eceabfd094ad5de_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-27_78ff471af50625d58eceabfd094ad5de_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:228
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4616

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=4148 --field-trial-handle=2280,i,4114443225282860369,4764091921472631035,262144 --variations-seed-version /prefetch:8
1⤵
PID:4808

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
128KB

MD5
3b194d68a1bfec8301fd4d30d9809e41

SHA1
aaebda10f93270fc67cb18fbf283333227033638

SHA256
407eaa19ad4cfb2e8b0e76d7b3408ae349af6cac1d9f70e4b3e9c30dc528a72a

SHA512
06509dd72182c4572271ab9ffb02d999ae5d844715da0aa88974f4fe73608d176241d00bbfae69f6311f75a1983b417bf53c8650435aaadb6beb3afdc69fab17

Download Submit
memory/228-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/228-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/228-2-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/228-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/228-25-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4616-19-0x0000000000850000-0x0000000000856000-memory.dmp

Filesize
24KB

Download
memory/4616-18-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4616-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download