5c3ee05eb82616006432352489d9afff766b4bafa6d87a3160e0164b13c30fd9

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
01/05/2024, 19:28

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General

Target

2024-05-01_751a22a46b646c7c06b6dfd17ea7d5f2_cryptolocker.exe
Size

58KB
MD5

751a22a46b646c7c06b6dfd17ea7d5f2
SHA1

098180ab0cc048828b1d9b7b3a853c09f247bdf7
SHA256

5c3ee05eb82616006432352489d9afff766b4bafa6d87a3160e0164b13c30fd9
SHA512

4cd306584e1721142ba75cf09a02ff9703363a954abfd0e5cbd70d1c4dc627dd27194310a3f9872e35fc0dc72b1268743752ef7a131df1fd7a63a27111441ce6
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAPj2:H6QFElP6n+gou9cvMOtEvwDpjCpVX/

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4232-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b7c-13.dat	CryptoLocker_rule2
behavioral2/memory/4232-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4008-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4232-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023b7c-13.dat	CryptoLocker_set1
behavioral2/memory/4232-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4008-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4232-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c000000023b7c-13.dat	UPX
behavioral2/memory/4232-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4008-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	2024-05-01_751a22a46b646c7c06b6dfd17ea7d5f2_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4008	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4232-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000c000000023b7c-13.dat	upx
behavioral2/memory/4232-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4008-26-0x0000000000500000-0x0000000000510000-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 4232 wrote to memory of 4008	4232	2024-05-01_751a22a46b646c7c06b6dfd17ea7d5f2_cryptolocker.exe	83
PID 4232 wrote to memory of 4008	4232	2024-05-01_751a22a46b646c7c06b6dfd17ea7d5f2_cryptolocker.exe	83
PID 4232 wrote to memory of 4008	4232	2024-05-01_751a22a46b646c7c06b6dfd17ea7d5f2_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-01_751a22a46b646c7c06b6dfd17ea7d5f2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-01_751a22a46b646c7c06b6dfd17ea7d5f2_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4232
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4008

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
58KB

MD5
21579bc4106600533b0d7613ba093dc2

SHA1
634ddffda8f31a88aca2fc64fd9d19b1e8905b05

SHA256
2b5e0f6600ea53f1b9c6271bdc4791f7f2021c3c1744b898a5778b2c859478fc

SHA512
5639bc032e59969b87c6be83b2ac458e1257390c5c9a2e12e475c5db9b18b95eedb7f2ad4452f85b700ee82853479e8f95fc66597243a868d4e49644ef8890e7

Download Submit
memory/4008-19-0x0000000000860000-0x0000000000866000-memory.dmp

Filesize
24KB

Download
memory/4008-25-0x0000000000840000-0x0000000000846000-memory.dmp

Filesize
24KB

Download
memory/4008-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4232-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4232-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/4232-2-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4232-9-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/4232-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download