29e9f79ce58f57c2dee464783b5ed06f2f200ea494d6f050311c86223182f349

Analysis

max time kernel
148s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
20/04/2024, 11:47

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-04-20_ad59ac766cdc68f4d3ab70cb6cc9a649_cryptolocker.exe
Size

67KB
MD5

ad59ac766cdc68f4d3ab70cb6cc9a649
SHA1

355d4066481b84daa082c60788585ca65e8f1c7d
SHA256

29e9f79ce58f57c2dee464783b5ed06f2f200ea494d6f050311c86223182f349
SHA512

d7ff35febfe1c360e0f6945ed3223b9c9bbe9e5bb6dcda8c3c11a77ab0432f7a765cb71e84fef5d0cd9f255bc7fdbf35c7a2be31e5a878773d5ed900d61c6398
SSDEEP

768:quVbxjgQNQXtckstOOtEvwDpjAaDOK6PsED3VK2+ZtyOjgO4r9vFAg2rq6W1A1P6:quJu9cvMOtEvwDpjWYTjipvF2bx1PQA6

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3844-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3844-10-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023248-14.dat	CryptoLocker_rule2
behavioral2/memory/1520-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3844-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3844-10-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023248-14.dat	CryptoLocker_set1
behavioral2/memory/1520-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3844-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3844-10-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0008000000023248-14.dat	UPX
behavioral2/memory/1520-28-0x0000000000500000-0x000000000050F000-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	2024-04-20_ad59ac766cdc68f4d3ab70cb6cc9a649_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1520	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3844-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3844-10-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0008000000023248-14.dat	upx
behavioral2/memory/1520-28-0x0000000000500000-0x000000000050F000-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 3844 wrote to memory of 1520	3844	2024-04-20_ad59ac766cdc68f4d3ab70cb6cc9a649_cryptolocker.exe	90
PID 3844 wrote to memory of 1520	3844	2024-04-20_ad59ac766cdc68f4d3ab70cb6cc9a649_cryptolocker.exe	90
PID 3844 wrote to memory of 1520	3844	2024-04-20_ad59ac766cdc68f4d3ab70cb6cc9a649_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-04-20_ad59ac766cdc68f4d3ab70cb6cc9a649_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_ad59ac766cdc68f4d3ab70cb6cc9a649_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3844
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1520

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=2760 --field-trial-handle=2304,i,6987730730348465820,3913273227385401271,262144 --variations-seed-version /prefetch:8
1⤵
PID:1768

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
67KB

MD5
5efa1a470af4387cbeeb8a540a5c0cd6

SHA1
f6689717c9d67d183044e65b91415eaf5d22ee4b

SHA256
8706527b362e40fe2cc0115de6bf3c67af6f7b1ccc15f3a4595b84ee49abeb1c

SHA512
e3ee8d5221f03f80866ca63cc4dedddf83cf94f4450f79d8608d94e1e7de40c5e4cbbf9dea663480f6f5b701b10a3b7dfff8074a103506efffa959433871a744

Download Submit
memory/1520-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1520-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1520-28-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3844-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3844-1-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/3844-2-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/3844-3-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/3844-10-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download