2b1ca30d4d97874330ff573aebe7e5f97a61d03e5caeb33ad3cfdf806e7ed1fa

Analysis

max time kernel
144s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
18/04/2024, 04:27

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General

Target

2024-04-18_0fe6586333ba7d4953e264d86aa5da47_cryptolocker.exe
Size

64KB
MD5

0fe6586333ba7d4953e264d86aa5da47
SHA1

1206507cbeb15bcf30391d32f5e1cf4e3c1f7dce
SHA256

2b1ca30d4d97874330ff573aebe7e5f97a61d03e5caeb33ad3cfdf806e7ed1fa
SHA512

989bba8e3ccd13f95306277a23441da51bdb827e8f2421438139bce270dfdd6d3437dd6b349026b718f7fac84eafcb743bc94dea535058c49b6258affbee6378
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAoQRa:1nK6a+qdOOtEvwDpjb

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2172-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023524-13.dat	CryptoLocker_rule2
behavioral2/memory/2172-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4684-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2172-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023524-13.dat	CryptoLocker_set1
behavioral2/memory/2172-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4684-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2172-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0008000000023524-13.dat	UPX
behavioral2/memory/2172-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4684-26-0x0000000000500000-0x000000000050F311-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1230272463-3683322193-511842230-1000\Control Panel\International\Geo\Nation	2024-04-18_0fe6586333ba7d4953e264d86aa5da47_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4684	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2172-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0008000000023524-13.dat	upx
behavioral2/memory/2172-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4684-26-0x0000000000500000-0x000000000050F311-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

description	pid	Process	procid_target
PID 2172 wrote to memory of 4684	2172	2024-04-18_0fe6586333ba7d4953e264d86aa5da47_cryptolocker.exe	95
PID 2172 wrote to memory of 4684	2172	2024-04-18_0fe6586333ba7d4953e264d86aa5da47_cryptolocker.exe	95
PID 2172 wrote to memory of 4684	2172	2024-04-18_0fe6586333ba7d4953e264d86aa5da47_cryptolocker.exe	95

C:\Users\Admin\AppData\Local\Temp\2024-04-18_0fe6586333ba7d4953e264d86aa5da47_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-18_0fe6586333ba7d4953e264d86aa5da47_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2172
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4684

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=3916,i,15908197445916505728,3652410145502233610,262144 --variations-seed-version --mojo-platform-channel-handle=4188 /prefetch:8
1⤵
PID:4100

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
64KB

MD5
e2e98739fbb5177472b5e42313ce8687

SHA1
7b29c640c9a1f5552b91a211fedb8ad6bd922793

SHA256
acf17c62008e307402d3c370f6b7ffb3815e58a430de1899a6a5eec525214787

SHA512
17c495ab038639714b2cb2e5dfcda8b35385ad7d4c7c0b5de330504d326430bbf93987b21965a3577b9de3a580442ba204b9ee615950dd41ed19a3a32d5013a7

Download Submit
memory/2172-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2172-1-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/2172-2-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/2172-3-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/2172-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4684-19-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/4684-20-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/4684-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download