f068e42e101d78d727f0b896d6829d537dd49ed7f4e45ba345de8868a0fe83f7

Analysis

max time kernel
150s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/02/2024, 16:51

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General

Target

2024-02-28_a43ec4dcffe27f0953375004b630b675_cryptolocker.exe
Size

57KB
MD5

a43ec4dcffe27f0953375004b630b675
SHA1

4d874c7d7efcec363bff86ef09a6f5e12cc39c80
SHA256

f068e42e101d78d727f0b896d6829d537dd49ed7f4e45ba345de8868a0fe83f7
SHA512

14b9d68f017cd41ca239b3538bfe5260c88b4b13a43e17dc6234c68dab638e31148314101fb9e125a3164de51552330a9cb096bf073703c1bf1e04ee18dcc182
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61l:BbdDmjr+OtEvwDpjMT

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3956-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023252-13.dat	CryptoLocker_rule2
behavioral2/memory/3956-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/212-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/3956-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/212-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3956-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023252-13.dat	UPX
behavioral2/memory/3956-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/212-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-02-28_a43ec4dcffe27f0953375004b630b675_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
212	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 3956 wrote to memory of 212	3956	2024-02-28_a43ec4dcffe27f0953375004b630b675_cryptolocker.exe	98
PID 3956 wrote to memory of 212	3956	2024-02-28_a43ec4dcffe27f0953375004b630b675_cryptolocker.exe	98
PID 3956 wrote to memory of 212	3956	2024-02-28_a43ec4dcffe27f0953375004b630b675_cryptolocker.exe	98

C:\Users\Admin\AppData\Local\Temp\2024-02-28_a43ec4dcffe27f0953375004b630b675_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_a43ec4dcffe27f0953375004b630b675_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3956
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:212

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=4068 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:8
1⤵
PID:3828

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
57KB

MD5
33c5f4ec807265e7063b2302ecbebac6

SHA1
c0f273bdacd1abdd61698ed298334fd15c292d2c

SHA256
bda474a493d006468fe4c87d553f950fe124440420fb65943bc802f8de98f664

SHA512
feac97a67a3e566de650773cc3b45699ad5f3f1c55a0c44e708e9434194ba8999940a809a87d483a37270495718e3d25f20b56aab676f72a71f52fb568bb0379

Download Submit
memory/212-21-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/212-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/212-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3956-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3956-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3956-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3956-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/3956-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download