db0420194c3838bbe6594eb967885752838b09946e57e76c300a576061c986db

Analysis

max time kernel
152s
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
23-05-2024 02:22

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General

Target

2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe
Size

24KB
MD5

0cd7e81faf9c27f078ec2bce27242d2c
SHA1

ca2ff83a6b5419544506d35b330ccd3641084f36
SHA256

db0420194c3838bbe6594eb967885752838b09946e57e76c300a576061c986db
SHA512

b19126af58903c9110d39366003668871d1ecf81cd1574355be92d857f2b5fac7f8beecf7d7ef984143d5cd05264a505627862cd436e95ce0d4b24d78774e6e6
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMJ2C:bVCPwFRo6CpwXFXSqQXfjAsJ9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2916-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral2/memory/2916-19-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4920-27-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2916-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	UPX
behavioral2/memory/2916-19-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/4920-27-0x0000000008000000-0x000000000800E000-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

Processes:

2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

4920 hasfj.exe

pid	process
4920	hasfj.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2916-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	upx
behavioral2/memory/2916-19-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/4920-27-0x0000000008000000-0x000000000800E000-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

Processes:

2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe

description	pid	process	target process
PID 2916 wrote to memory of 4920	2916	2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe	hasfj.exe
PID 2916 wrote to memory of 4920	2916	2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe	hasfj.exe
PID 2916 wrote to memory of 4920	2916	2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_0cd7e81faf9c27f078ec2bce27242d2c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2916

C:\Users\Admin\AppData\Local\Temp\hasfj.exe
"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
2⤵
- Executes dropped EXE
PID:4920

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=4832 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:8
1⤵
PID:3460

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\hasfj.exe
Filesize
24KB

MD5
07099e91790eb8dceb7f4f84c01b3dc7

SHA1
f4c115b51edfe93ee34a1a69d72219e34f3cdb23

SHA256
742b9e0c76806a5b630f26e112126270b4320f90037fa235c1c14627028c6272

SHA512
b0d6a4a26959724c4004cffb14452cdf512638ccb8d6de49f55a89cc3cd79971f0c2a6b68faad88ab917adc5094413c3fb10fc54cf6cbe24dabec6735e799cd6

Download Submit
memory/2916-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2916-1-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/2916-2-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/2916-3-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/2916-19-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/4920-22-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/4920-20-0x0000000002ED0000-0x0000000002ED6000-memory.dmp

Filesize
24KB

Download
memory/4920-27-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download