b8c8c4c5b99d9209652a43ebe4b8dd062c4ddb071cbdea39dc3fe9a4dc933b8f

Analysis

max time kernel
147s
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
23-05-2024 02:28

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General

Target

2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe
Size

39KB
MD5

3e7c55ddfe2918c0f715ff0a48f2f3bf
SHA1

6174b11dd1e16767fec4cb8244bd7d714ea71843
SHA256

b8c8c4c5b99d9209652a43ebe4b8dd062c4ddb071cbdea39dc3fe9a4dc933b8f
SHA512

1282c1914281ecb0a9516e46ce89c3da411bda72a55cc833eb70e1e8309e0ed1e2b7491b55c600777516f6c5d13e0e71f5ce72db875de5fb2bcfcfbaeb6cfc86
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYn:qDdFJy3QMOtEvwDpjjWMl7T+

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4068-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4068-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2752-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4068-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4068-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2752-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4068-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4068-10-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2752-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_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_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2752 asih.exe

pid	process
2752	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4068-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4068-10-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2752-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe

description	pid	process	target process
PID 4068 wrote to memory of 2752	4068	2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe	asih.exe
PID 4068 wrote to memory of 2752	4068	2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe	asih.exe
PID 4068 wrote to memory of 2752	4068	2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4068

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2752

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=2268 --field-trial-handle=2244,i,11878111470816612087,2265290141962607370,262144 --variations-seed-version /prefetch:8
1⤵
PID:5076

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
40KB

MD5
4dc1ab367aa7ca716006dc426dde17d0

SHA1
2da31d8ede60210e07c9492a2456b562d043046f

SHA256
7e5bec920edc929df2625cbf0af3f19af4a0faff11f74de45ff9e4ca80ee8357

SHA512
af876bac669c9c6df73af19eb55f1ca0050a1eb41c28afa1457b886d3ffdf783b338e111641e3b2c918ae4406e2c8017652183703c551dacb79bc67b95ad2082

Download Submit
memory/2752-19-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/2752-25-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2752-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4068-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4068-1-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4068-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4068-3-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4068-10-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download