42d302667b9b830bbbb37b640fed43ca39540e87c618d10b247aa7d0c69c0cd9

Analysis

max time kernel
155s
max time network
162s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
16/03/2024, 04:35

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-03-16_a0776c5fdbfb6a43760bc9ad2fedf60f_cryptolocker.exe
Size

88KB
MD5

a0776c5fdbfb6a43760bc9ad2fedf60f
SHA1

ad767137d131786e14d75095b573a28ab5cb1620
SHA256

42d302667b9b830bbbb37b640fed43ca39540e87c618d10b247aa7d0c69c0cd9
SHA512

2125de2a88d4e7a04eb7a502fdb710b044a634e1dcc52a67089940ee6c591a0d6af82400ab6153b96588be9be2a8d058c27a6265f0109291254a4e298de24b6b
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgSfl:AnBdOOtEvwDpj6zA

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3248-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023256-13.dat	CryptoLocker_rule2
behavioral2/memory/3248-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4040-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3248-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023256-13.dat	CryptoLocker_set1
behavioral2/memory/3248-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4040-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3248-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0008000000023256-13.dat	UPX
behavioral2/memory/3248-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4040-26-0x0000000000500000-0x000000000050F000-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	2024-03-16_a0776c5fdbfb6a43760bc9ad2fedf60f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4040	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3248-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0008000000023256-13.dat	upx
behavioral2/memory/3248-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4040-26-0x0000000000500000-0x000000000050F000-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 3248 wrote to memory of 4040	3248	2024-03-16_a0776c5fdbfb6a43760bc9ad2fedf60f_cryptolocker.exe	95
PID 3248 wrote to memory of 4040	3248	2024-03-16_a0776c5fdbfb6a43760bc9ad2fedf60f_cryptolocker.exe	95
PID 3248 wrote to memory of 4040	3248	2024-03-16_a0776c5fdbfb6a43760bc9ad2fedf60f_cryptolocker.exe	95

C:\Users\Admin\AppData\Local\Temp\2024-03-16_a0776c5fdbfb6a43760bc9ad2fedf60f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-16_a0776c5fdbfb6a43760bc9ad2fedf60f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3248
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4040

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=4072 --field-trial-handle=2272,i,4858140932023865871,5726683989663339295,262144 --variations-seed-version /prefetch:8
1⤵
PID:512

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
88KB

MD5
f79f4739ec6440a6520e54840a4de61f

SHA1
9eb7cd0f894d0dd786ec1124259e01e715020033

SHA256
b138465fcccf7513cf7e9ea1d66bfe26844a39d3fa92b46d272688873dea185d

SHA512
18e139bc722ce43506371b5d3fcedabadd73adc0d020522d634d5b16725f5a64dc9596103180c10a9373e99a20ac22ddb13e37e366cc98c0b623d4202be05634

Download Submit
memory/3248-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3248-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3248-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3248-3-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/3248-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4040-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4040-19-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/4040-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download