d672f8dd566ed7c042591df0493f529cb233f47533183f8e2497a1e62903e712

Analysis

max time kernel
148s
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
08/04/2024, 15:47

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General

Target

2024-04-08_f22c89b807d44433ba84c073fa421a56_cryptolocker.exe
Size

53KB
MD5

f22c89b807d44433ba84c073fa421a56
SHA1

795c5cb0c2178b11a8cbd7e212153d3600376763
SHA256

d672f8dd566ed7c042591df0493f529cb233f47533183f8e2497a1e62903e712
SHA512

6a42aa7f2f8ecbd8843bb7811d08243f227a65275ec5a88d9794ac6726b132d3c7c83814bad99a10424e8c3ed11f6c35ff843cdf9ca5e1be71a582ce01aed1c1
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb6Impys:BbdDmjr+OtEvwDpjMH

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4532-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000e00000002314e-13.dat	CryptoLocker_rule2
behavioral2/memory/4532-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/532-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/532-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4532-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/532-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/532-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4532-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000e00000002314e-13.dat	UPX
behavioral2/memory/4532-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/532-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/532-27-0x0000000000500000-0x0000000000510000-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-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation	2024-04-08_f22c89b807d44433ba84c073fa421a56_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
532	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 4532 wrote to memory of 532	4532	2024-04-08_f22c89b807d44433ba84c073fa421a56_cryptolocker.exe	87
PID 4532 wrote to memory of 532	4532	2024-04-08_f22c89b807d44433ba84c073fa421a56_cryptolocker.exe	87
PID 4532 wrote to memory of 532	4532	2024-04-08_f22c89b807d44433ba84c073fa421a56_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-04-08_f22c89b807d44433ba84c073fa421a56_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-08_f22c89b807d44433ba84c073fa421a56_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4532
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:532

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
53KB

MD5
36e7b152299d165c49d9bcadb674ade1

SHA1
94413f7cef8957dd5af05227fa38bb831ef34119

SHA256
5864575e9c39745daf603ec3841f8d250fb3538b389188c0061b07a3d9d69762

SHA512
0644fee31b61abfb8d77f70bcaff4b25cbca67f25b75ec21e25d9ca5c124436f2c7b21a00b40a608a82e6eee651c5c1deb9c5381ef023fcd517aa2ee2eca1cb0

Download Submit
memory/532-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/532-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/532-23-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/532-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4532-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4532-1-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/4532-2-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/4532-3-0x0000000002240000-0x0000000002246000-memory.dmp

Filesize
24KB

Download
memory/4532-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download