0da141c1902852a4ad51b0f5d326109404ba22d0b2fa2e401a05e9f718be322d

Analysis

max time kernel
143s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
17/04/2024, 06:07

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General

Target

2024-04-17_e77252ffeda95b9042ac9fc3a994d667_cryptolocker.exe
Size

106KB
MD5

e77252ffeda95b9042ac9fc3a994d667
SHA1

c0574f44297890430f4366b0449f3afdec635b5a
SHA256

0da141c1902852a4ad51b0f5d326109404ba22d0b2fa2e401a05e9f718be322d
SHA512

07777784e7076039350c56c8f72ca3cf6432774763c236fd9f6c9f8a613b4819b13abdb6baa3ad87d20beb26a1312802cd0185c8dbd3858aad2a1b3ccc039be4
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GksdEU:1nK6a+qdOOtEvwDpjn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1844-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023247-13.dat	CryptoLocker_rule2
behavioral2/memory/1844-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5076-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1844-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023247-13.dat	CryptoLocker_set1
behavioral2/memory/1844-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/5076-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1844-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0008000000023247-13.dat	UPX
behavioral2/memory/1844-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/5076-26-0x0000000000500000-0x000000000050F311-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	2024-04-17_e77252ffeda95b9042ac9fc3a994d667_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5076	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1844-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0008000000023247-13.dat	upx
behavioral2/memory/1844-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/5076-26-0x0000000000500000-0x000000000050F311-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 1844 wrote to memory of 5076	1844	2024-04-17_e77252ffeda95b9042ac9fc3a994d667_cryptolocker.exe	91
PID 1844 wrote to memory of 5076	1844	2024-04-17_e77252ffeda95b9042ac9fc3a994d667_cryptolocker.exe	91
PID 1844 wrote to memory of 5076	1844	2024-04-17_e77252ffeda95b9042ac9fc3a994d667_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-17_e77252ffeda95b9042ac9fc3a994d667_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-17_e77252ffeda95b9042ac9fc3a994d667_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1844
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5076

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=3972 --field-trial-handle=2900,i,14549994492153927475,12895178890800740987,262144 --variations-seed-version /prefetch:8
1⤵
PID:4384

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
106KB

MD5
13ef2e753af7566f518ee882be6cfc46

SHA1
ab9da0cda1d75449e0e66d2b13d931cc3ce92469

SHA256
c887461693345a5caf71ebccad77b86efa0db5c62600080ba8e3eb5d364bff68

SHA512
7cb4bbd273d6ef6dd530e1ad21d2d8fb8b3ec39944e3d3b8fae3f1db963cb3cf12add59271544d5b04093c515ba346a4b82744b91e9f58571943a7d34cc47055

Download Submit
memory/1844-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1844-1-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/1844-2-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/1844-3-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/1844-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/5076-19-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/5076-21-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/5076-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download