a11b933a7cccdc924d7b02b06d9b450fc98e636006adfb36fb57da25cba2a024

Analysis

max time kernel
151s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27-05-2024 19:52

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General

Target

2024-05-27_eb17d7fa5fd9855ea8ea6b88f77ba142_cryptolocker.exe
Size

24KB
MD5

eb17d7fa5fd9855ea8ea6b88f77ba142
SHA1

ec3692e1434fcb3bce20e2a6e75285242f1e3d49
SHA256

a11b933a7cccdc924d7b02b06d9b450fc98e636006adfb36fb57da25cba2a024
SHA512

0d1827d1c47019f971ed390b2539cadd25ff011244dcd20ff33058ae9b575324b1c37aa18d08140060b4d7a91d4c8c76eb5f2e0bc6952124e31af267ea21fd3a
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMJ2Y:bVCPwFRo6CpwXFXSqQXfjAsJb

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3488-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002326d-13.dat	CryptoLocker_rule2
behavioral2/memory/3488-19-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4744-27-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3488-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x000900000002326d-13.dat	UPX
behavioral2/memory/3488-19-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/4744-27-0x0000000008000000-0x000000000800E000-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	2024-05-27_eb17d7fa5fd9855ea8ea6b88f77ba142_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4744	hasfj.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3488-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x000900000002326d-13.dat	upx
behavioral2/memory/3488-19-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/4744-27-0x0000000008000000-0x000000000800E000-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 3488 wrote to memory of 4744	3488	2024-05-27_eb17d7fa5fd9855ea8ea6b88f77ba142_cryptolocker.exe	91
PID 3488 wrote to memory of 4744	3488	2024-05-27_eb17d7fa5fd9855ea8ea6b88f77ba142_cryptolocker.exe	91
PID 3488 wrote to memory of 4744	3488	2024-05-27_eb17d7fa5fd9855ea8ea6b88f77ba142_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-05-27_eb17d7fa5fd9855ea8ea6b88f77ba142_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_eb17d7fa5fd9855ea8ea6b88f77ba142_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3488
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:4744

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=4156 --field-trial-handle=2180,i,12780723798465539942,12010519452607841069,262144 --variations-seed-version /prefetch:8
1⤵
PID:4024

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\hasfj.exe

Filesize
24KB

MD5
0d426d7daff290d9e5b6994e56502e5f

SHA1
843619ec1474e584a6bab49b6d9a33a1ca8d45dd

SHA256
e63cd605027bf430837b96f498f87a2a5b7a28d538dd43124fa48f9429b08605

SHA512
b4e2ec25bfe17c4f3a68dad8e6863f3dc6bfcd690d43bbc9272962de5e49f207a3894da51865fd02cf53fc4b3be73d08c15100c3501ab857eeafee3e0ebe271b

Download Submit
memory/3488-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/3488-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3488-2-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3488-3-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/3488-19-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/4744-20-0x00000000022C0000-0x00000000022C6000-memory.dmp

Filesize
24KB

Download
memory/4744-26-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4744-27-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download