0ee62cf82a1329e75566f2fea1ebe57a4fc5063e3c544a01e21560f4fd129796

Analysis

max time kernel
151s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
19/04/2024, 20:41

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General

Target

2024-04-19_65b820c29f966d3f5b4b8c1150973f09_cryptolocker.exe
Size

109KB
MD5

65b820c29f966d3f5b4b8c1150973f09
SHA1

bfe82dddb718b92d2df27267e3469d805bebb55b
SHA256

0ee62cf82a1329e75566f2fea1ebe57a4fc5063e3c544a01e21560f4fd129796
SHA512

d6b88b32915e82bb57ced2fb6ea93250d45f4d2f176a5fb17b01f3bdbbcb9d26044021c37525bab2131ada339fd34409471568b9b2d11db2cdf5d227e6257a7b
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwMgg:z6a+CdOOtEvwDpjcz0

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1284-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1284-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a000000016fa5-14.dat	CryptoLocker_rule2
behavioral2/memory/4136-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1284-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1284-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000a000000016fa5-14.dat	CryptoLocker_set1
behavioral2/memory/4136-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1284-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1284-10-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000a000000016fa5-14.dat	UPX
behavioral2/memory/4136-19-0x0000000000500000-0x0000000000510000-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	2024-04-19_65b820c29f966d3f5b4b8c1150973f09_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4136	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1284-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1284-10-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000a000000016fa5-14.dat	upx
behavioral2/memory/4136-19-0x0000000000500000-0x0000000000510000-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 1284 wrote to memory of 4136	1284	2024-04-19_65b820c29f966d3f5b4b8c1150973f09_cryptolocker.exe	93
PID 1284 wrote to memory of 4136	1284	2024-04-19_65b820c29f966d3f5b4b8c1150973f09_cryptolocker.exe	93
PID 1284 wrote to memory of 4136	1284	2024-04-19_65b820c29f966d3f5b4b8c1150973f09_cryptolocker.exe	93

C:\Users\Admin\AppData\Local\Temp\2024-04-19_65b820c29f966d3f5b4b8c1150973f09_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-19_65b820c29f966d3f5b4b8c1150973f09_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1284
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4136

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=3644 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:8
1⤵
PID:3536

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
109KB

MD5
68f8bff1a2ae47810e1bbd04f2450364

SHA1
6b609e7f3962fef56c4f88c3d4f43bc5aef92c35

SHA256
6d676a858d7d02e552e4dfb0a16f4d11d8951d9a5601dbe274cbc5f7b5c28374

SHA512
9f2868243111f8f4380a305ac23fe44b3868eff222d6cc014431946d129d1f704b2d9bac98465b02447a260be17bc140db390df53aa0170bb49f4aef90cbba3c

Download Submit
memory/1284-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1284-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1284-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1284-3-0x0000000000810000-0x0000000000816000-memory.dmp

Filesize
24KB

Download
memory/1284-10-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4136-22-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4136-20-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/4136-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download