4f97c35cb6101e48c1b1073d0e9729426dad3f225da3551328fcb56e928ebdec

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
09/04/2024, 01:42

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General

Target

2024-04-09_1e5c64084733f9d7c5b5493a26bbdecc_cryptolocker.exe
Size

52KB
MD5

1e5c64084733f9d7c5b5493a26bbdecc
SHA1

732f41005ef062ab17dcd46d2334c92ff4b8534d
SHA256

4f97c35cb6101e48c1b1073d0e9729426dad3f225da3551328fcb56e928ebdec
SHA512

0bf6e6e5d87858ffd962fa817976ea86912fc62becbcccac1cfbe46a45e9bfb326d0b7718868eb75bbc91400626bc708b39d65a7c7d053d312dcae1ac1785139
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb6ImpyeW:BbdDmjr+OtEvwDpjME

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1704-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023310-13.dat	CryptoLocker_rule2
behavioral2/memory/1704-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5028-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/1704-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5028-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1704-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023310-13.dat	UPX
behavioral2/memory/1704-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5028-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	2024-04-09_1e5c64084733f9d7c5b5493a26bbdecc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5028	asih.exe

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 1704 wrote to memory of 5028	1704	2024-04-09_1e5c64084733f9d7c5b5493a26bbdecc_cryptolocker.exe	94
PID 1704 wrote to memory of 5028	1704	2024-04-09_1e5c64084733f9d7c5b5493a26bbdecc_cryptolocker.exe	94
PID 1704 wrote to memory of 5028	1704	2024-04-09_1e5c64084733f9d7c5b5493a26bbdecc_cryptolocker.exe	94

C:\Users\Admin\AppData\Local\Temp\2024-04-09_1e5c64084733f9d7c5b5493a26bbdecc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-09_1e5c64084733f9d7c5b5493a26bbdecc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1704
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5028

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=3952 --field-trial-handle=2264,i,7010714054498059916,1862725710331979271,262144 --variations-seed-version /prefetch:8
1⤵
PID:1048

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
52KB

MD5
21f433bb1d00ae02ba52b7823d8109c1

SHA1
cc018683ed549fe7d13073d26fab73d147528690

SHA256
c1b8dfa36ec4a8a28846dc50de9ef84e90d835112dbe66bcb55b79e9cd04c8c4

SHA512
c94ea3dd118c3a0a0cd0ea9f56cadbb9e271056bdda39f8cd675ba8df65dd2aa66f58d04112985dbf0c5371a912be9cb83ac0cd48fd49b09932d7c61f5c62f71

Download Submit
memory/1704-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1704-1-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/1704-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/1704-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1704-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5028-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/5028-21-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/5028-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download