46fb18851d0c81eaaf30cba79df3fb31cd653b0b102b4a9a7b95e6c4faa1a553

Analysis

max time kernel
143s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
29/03/2024, 16:38

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-03-29_34a002b3864b12429e3c0cd7ed2be4ad_cryptolocker.exe
Size

49KB
MD5

34a002b3864b12429e3c0cd7ed2be4ad
SHA1

33479dee8f0a965c7c3635b6c622a8233ad047d7
SHA256

46fb18851d0c81eaaf30cba79df3fb31cd653b0b102b4a9a7b95e6c4faa1a553
SHA512

de2a40d63276c686b74bb587faa9d5f6dd6e9f0dadc816982df7db3a0eef30297b392fa07fc2b1fecae9e96d99373a60531ba8c7c2406f5b5d4771ebdc9d3a78
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1tXjT:z6QFElP6n+gKmddpMOtEvwDpj3fv

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4620-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00030000000227e7-13.dat	CryptoLocker_rule2
behavioral2/memory/4620-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4672-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4620-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00030000000227e7-13.dat	CryptoLocker_set1
behavioral2/memory/4620-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4672-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4620-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00030000000227e7-13.dat	UPX
behavioral2/memory/4620-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4672-26-0x0000000000500000-0x0000000000510000-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	2024-03-29_34a002b3864b12429e3c0cd7ed2be4ad_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4672	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4620-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00030000000227e7-13.dat	upx
behavioral2/memory/4620-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4672-26-0x0000000000500000-0x0000000000510000-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 4620 wrote to memory of 4672	4620	2024-03-29_34a002b3864b12429e3c0cd7ed2be4ad_cryptolocker.exe	95
PID 4620 wrote to memory of 4672	4620	2024-03-29_34a002b3864b12429e3c0cd7ed2be4ad_cryptolocker.exe	95
PID 4620 wrote to memory of 4672	4620	2024-03-29_34a002b3864b12429e3c0cd7ed2be4ad_cryptolocker.exe	95

C:\Users\Admin\AppData\Local\Temp\2024-03-29_34a002b3864b12429e3c0cd7ed2be4ad_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-29_34a002b3864b12429e3c0cd7ed2be4ad_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4620
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4672

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=1408 --field-trial-handle=2276,i,5697607538120380977,9987005253899555344,262144 --variations-seed-version /prefetch:8
1⤵
PID:4444

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
49KB

MD5
577e642dcebf8be1e00a8b78e0fc9e3c

SHA1
93860b68bdebb290c6570accbb8130fc23f09030

SHA256
b848f9d0562025610af22345adc8bbe9f0e88525adc7d149b981ef17fa4331f0

SHA512
5a683efc24a031d073a40ebefef9e11aa2180006adfbe6880f980df31eabe154db8e79ca2d9e77e97e13433a80a31efd2f2b3de899298cf42cd5eec2693f1550

Download Submit
memory/4620-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4620-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4620-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4620-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/4620-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4672-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4672-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4672-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download