54e3918e6276e836d2d1482098ec7d874ee66a5fea6a59d802b5ebb959f21747

Analysis

max time kernel
145s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27/02/2024, 15:30

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General

Target

2024-02-27_2fc839c994acf259d6f7d3a925935c09_cryptolocker.exe
Size

104KB
MD5

2fc839c994acf259d6f7d3a925935c09
SHA1

f6d383dcaea8bd56540fdfa104fcdc7c37a65625
SHA256

54e3918e6276e836d2d1482098ec7d874ee66a5fea6a59d802b5ebb959f21747
SHA512

58c9c9416bb27889fb26da2f67021c46a2717ab1b14d25cc24c3a6e7c4ad0050417f1126bdc0fe76430ae639f621dc9cf1a3ebfccbd780bc8d0377d60d5ac8be
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GksN:1nK6a+qdOOtEvwDpjN

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1208-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023277-13.dat	CryptoLocker_rule2
behavioral2/memory/1208-24-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1104-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1208-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023277-13.dat	CryptoLocker_set1
behavioral2/memory/1208-24-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/1104-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1208-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0008000000023277-13.dat	UPX
behavioral2/memory/1208-24-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/1104-25-0x0000000000500000-0x000000000050F311-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-02-27_2fc839c994acf259d6f7d3a925935c09_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1104	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1208-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0008000000023277-13.dat	upx
behavioral2/memory/1208-24-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/1104-25-0x0000000000500000-0x000000000050F311-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 1208 wrote to memory of 1104	1208	2024-02-27_2fc839c994acf259d6f7d3a925935c09_cryptolocker.exe	99
PID 1208 wrote to memory of 1104	1208	2024-02-27_2fc839c994acf259d6f7d3a925935c09_cryptolocker.exe	99
PID 1208 wrote to memory of 1104	1208	2024-02-27_2fc839c994acf259d6f7d3a925935c09_cryptolocker.exe	99

C:\Users\Admin\AppData\Local\Temp\2024-02-27_2fc839c994acf259d6f7d3a925935c09_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-27_2fc839c994acf259d6f7d3a925935c09_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1208
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1104

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=3756 --field-trial-handle=2248,i,10247514684337323751,15511974759131734137,262144 --variations-seed-version /prefetch:8
1⤵
PID:3524

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
104KB

MD5
3b9d5972642c5cff069f131c288f3aa0

SHA1
7367b8ace5ffa0da5fa7c9aa9e8b2b88ceda6058

SHA256
e32efa428d56ac7703b8cc57da86db207bd131e40950e9db54270d8709fe8019

SHA512
fb4244098e93b72eae626e5a09424564f8933bfc23e7951adef7dd5ee0f7f34dcaf92d4dcb363ce34f53cf6a847b88c8cf41003c99f298a8305cd0a7a9048fb9

Download Submit
memory/1104-18-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/1104-25-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1208-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1208-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/1208-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/1208-3-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1208-24-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download