7f89ed7a39b2f438b4b7370085c0303872160f6130bd004f6a89a2b49983505f

Analysis

max time kernel
156s
max time network
169s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
20/04/2024, 19:03

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General

Target

2024-04-20_e75f6360a1eef6ec405567a76124b342_cryptolocker.exe
Size

57KB
MD5

e75f6360a1eef6ec405567a76124b342
SHA1

10ae57b151754017435d2612f8e92a3cc9adad25
SHA256

7f89ed7a39b2f438b4b7370085c0303872160f6130bd004f6a89a2b49983505f
SHA512

7a704b62845304dd8bdb2b7f9ca7ce6305e5b2e5b52b480a36e55bebd3b5e75f2e3619ca43b5e811480069413e4608f16d6b442df98923fe31c69dce1c692cc8
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAPO:H6QFElP6n+gou9cvMOtEvwDpjCpVXz

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4136-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023256-13.dat	CryptoLocker_rule2
behavioral2/memory/3248-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4136-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4136-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023256-13.dat	CryptoLocker_set1
behavioral2/memory/3248-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4136-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4136-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023256-13.dat	UPX
behavioral2/memory/3248-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4136-26-0x0000000000500000-0x0000000000510000-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	2024-04-20_e75f6360a1eef6ec405567a76124b342_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3248	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4136-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023256-13.dat	upx
behavioral2/memory/3248-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4136-26-0x0000000000500000-0x0000000000510000-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 4136 wrote to memory of 3248	4136	2024-04-20_e75f6360a1eef6ec405567a76124b342_cryptolocker.exe	91
PID 4136 wrote to memory of 3248	4136	2024-04-20_e75f6360a1eef6ec405567a76124b342_cryptolocker.exe	91
PID 4136 wrote to memory of 3248	4136	2024-04-20_e75f6360a1eef6ec405567a76124b342_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-20_e75f6360a1eef6ec405567a76124b342_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_e75f6360a1eef6ec405567a76124b342_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4136
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3248

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=1036 --field-trial-handle=2272,i,4858140932023865871,5726683989663339295,262144 --variations-seed-version /prefetch:8
1⤵
PID:4068

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
4732112450d5e51382b4655f09aecbdf

SHA1
5a8e428769f6d015f524ddc2bca5c56bc4d98199

SHA256
7065a54f99ed57bb740ed8ee5e3c3e9639b1f66d601c583f02ae1e65f2f30acf

SHA512
ad1d749d0b2e838f89c9e783f6b2617f0fec7bf2ee53de06a292e149e5cc6b28de2b381873ae0b847632a107ea3e60c1c97a323376e30e1160844f0b0328de0b

Download Submit
memory/3248-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3248-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3248-21-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4136-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4136-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4136-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4136-3-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4136-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download