5a851ffac5c6388267534711f9f097791cee65496ab545526d53343da690accd

Analysis

max time kernel
156s
max time network
166s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08-03-2024 02:32

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General

Target

2024-03-08_2d8efeeebe0309e24863f29a1d63fa80_cryptolocker.exe
Size

47KB
MD5

2d8efeeebe0309e24863f29a1d63fa80
SHA1

fa85c887cf47c021649274bf21aadd5bee49119c
SHA256

5a851ffac5c6388267534711f9f097791cee65496ab545526d53343da690accd
SHA512

318e50c9c360cab0df001f221d15566c0e4f5c5972a55b3447ce0ca7ab44558325e728118b2d1098adbc903ce05448cfe4f8c991933de20b60db078905c33d66
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mo220:qmbhXDmjr5MOtEvwDpj5cDtKkQZQJ7o

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/5136-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5136-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000600000002271f-14.dat	CryptoLocker_rule2
behavioral2/memory/3860-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/5136-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3860-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/5136-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5136-10-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000600000002271f-14.dat	UPX
behavioral2/memory/3860-27-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-03-08_2d8efeeebe0309e24863f29a1d63fa80_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3860	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 5136 wrote to memory of 3860	5136	2024-03-08_2d8efeeebe0309e24863f29a1d63fa80_cryptolocker.exe	99
PID 5136 wrote to memory of 3860	5136	2024-03-08_2d8efeeebe0309e24863f29a1d63fa80_cryptolocker.exe	99
PID 5136 wrote to memory of 3860	5136	2024-03-08_2d8efeeebe0309e24863f29a1d63fa80_cryptolocker.exe	99

C:\Users\Admin\AppData\Local\Temp\2024-03-08_2d8efeeebe0309e24863f29a1d63fa80_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-08_2d8efeeebe0309e24863f29a1d63fa80_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5136
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3860

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=3104 --field-trial-handle=2280,i,1836084024518340990,18250262151825427757,262144 --variations-seed-version /prefetch:8
1⤵
PID:1516

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
47KB

MD5
3a9c0ed718b12abf1409ca6f8a1ce071

SHA1
cc8355b05e31a9f7787c402c0e5c0e688a868c2c

SHA256
2370925a49b9722a499423974fa52644601bcc9de16e656d7b1843f52a649ac8

SHA512
ad3d0b7cff596b9722b37add61c92f351bd9a3c34ef4e45c499e6ff83cce180fd56361d98f59fa63dde195f3d674d36085973da02db83963bfd94379419f121a

Download Submit
memory/3860-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3860-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3860-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5136-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5136-1-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/5136-2-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/5136-3-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/5136-10-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download