12d3bfe702d11e779725e7f92daedab3395185f96c2e75be115f7f3e54da2394

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
12/03/2024, 10:25

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General

Target

2024-03-12_02203404e98eb10ffba6e6e94de2ca59_cryptolocker.exe
Size

108KB
MD5

02203404e98eb10ffba6e6e94de2ca59
SHA1

38573c57844f0433a00841795e60cd28b2f35387
SHA256

12d3bfe702d11e779725e7f92daedab3395185f96c2e75be115f7f3e54da2394
SHA512

d99f98096d7f7f154c60c6f4d9ed9d0a0da725271358c5ffdbd1fab668677db5cd1800830fe54b3beafa2fb266446a595c0f31f7f391fda1e4f18b052d245052
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GkszfW:1nK6a+qdOOtEvwDpj6

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3348-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023240-13.dat	CryptoLocker_rule2
behavioral2/memory/3348-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4740-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3348-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023240-13.dat	CryptoLocker_set1
behavioral2/memory/3348-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4740-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3348-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0008000000023240-13.dat	UPX
behavioral2/memory/3348-25-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4740-26-0x0000000000500000-0x000000000050F311-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	2024-03-12_02203404e98eb10ffba6e6e94de2ca59_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4740	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3348-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0008000000023240-13.dat	upx
behavioral2/memory/3348-25-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4740-26-0x0000000000500000-0x000000000050F311-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 3348 wrote to memory of 4740	3348	2024-03-12_02203404e98eb10ffba6e6e94de2ca59_cryptolocker.exe	98
PID 3348 wrote to memory of 4740	3348	2024-03-12_02203404e98eb10ffba6e6e94de2ca59_cryptolocker.exe	98
PID 3348 wrote to memory of 4740	3348	2024-03-12_02203404e98eb10ffba6e6e94de2ca59_cryptolocker.exe	98

C:\Users\Admin\AppData\Local\Temp\2024-03-12_02203404e98eb10ffba6e6e94de2ca59_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-12_02203404e98eb10ffba6e6e94de2ca59_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3348
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4740

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=3792 --field-trial-handle=2356,i,13261194862334667799,7441241219475888176,262144 --variations-seed-version /prefetch:8
1⤵
PID:1944

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
108KB

MD5
02e360eed674f0a45ef50d44a8772673

SHA1
74e7fa739beb0751ff7bac43e0e93d09dfb300dd

SHA256
6c52dec76ae84c3f4944a47a91a21f96179d76de46bd1aaffe1e8a13068526c6

SHA512
13f5eac893fcd45ebb8d1f9b82b0f8a6c6d07c9be9a373851cd1dc054542183fec0281536719f5caab3eb1758e79ca02cee8b71fb10e5d9edbfdcfec161d633c

Download Submit
memory/3348-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3348-1-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3348-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3348-3-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/3348-25-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4740-18-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4740-19-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/4740-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download