2155f439475fd2fa534db20144eeb5a7a116134cc59e70ef67473c2c1b5583b8

Analysis

max time kernel
145s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05/04/2024, 02:58

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General

Target

2024-04-05_e88a9595c67f543a3cd3b3e6c8e90909_cryptolocker.exe
Size

34KB
MD5

e88a9595c67f543a3cd3b3e6c8e90909
SHA1

2b753bb897ff07409bcef0c6220672b38a9c8af3
SHA256

2155f439475fd2fa534db20144eeb5a7a116134cc59e70ef67473c2c1b5583b8
SHA512

7d530298ba24120212e782d63a4c7eda3699b1dec52e9535805cc5ddba24ba3e07321da79bde346f448a49b27b1de27b6d23830e695a457f9f1e95e7ebb70fe2
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5axIM:qUmnpomddpMOtEvwDpjjaYaV

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3508-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3508-10-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002326d-14.dat	CryptoLocker_rule2
behavioral2/memory/1012-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3508-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3508-10-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000900000002326d-14.dat	CryptoLocker_set1
behavioral2/memory/1012-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3508-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3508-10-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000900000002326d-14.dat	UPX
behavioral2/memory/1012-27-0x0000000000500000-0x000000000050F000-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	2024-04-05_e88a9595c67f543a3cd3b3e6c8e90909_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1012	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3508-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3508-10-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000900000002326d-14.dat	upx
behavioral2/memory/1012-27-0x0000000000500000-0x000000000050F000-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 3508 wrote to memory of 1012	3508	2024-04-05_e88a9595c67f543a3cd3b3e6c8e90909_cryptolocker.exe	94
PID 3508 wrote to memory of 1012	3508	2024-04-05_e88a9595c67f543a3cd3b3e6c8e90909_cryptolocker.exe	94
PID 3508 wrote to memory of 1012	3508	2024-04-05_e88a9595c67f543a3cd3b3e6c8e90909_cryptolocker.exe	94

C:\Users\Admin\AppData\Local\Temp\2024-04-05_e88a9595c67f543a3cd3b3e6c8e90909_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-05_e88a9595c67f543a3cd3b3e6c8e90909_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3508
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1012

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=1424 --field-trial-handle=2180,i,12780723798465539942,12010519452607841069,262144 --variations-seed-version /prefetch:8
1⤵
PID:1956

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
34KB

MD5
ed7e54e41cf54e3dc0cc2b7c7c838a64

SHA1
1cea3d90499752c992ac6f563b7cf922211e3368

SHA256
baaa1b08673e09a52386114b7937bdef9cacc2dc61006b4a028791a9b1ed0877

SHA512
62fcb84af52b9b8d63c797a8ed74513d01b04867ab3c7b8179fc6375439041124b460eaf85d69f8b5f73abcbf22f1e8ea8728c3f066497600617e37dc86e04e3

Download Submit
memory/1012-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/1012-20-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1012-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3508-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3508-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3508-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3508-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3508-10-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download