7ee7dc8e21d3ac1964ba238f80d757f47ba6aaa5167644d92a1a3b8f3e2b4072

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
15-04-2024 23:41

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General

Target

2024-04-15_bc3bafa2d2309860d70958bbcf317d9b_cryptolocker.exe
Size

37KB
MD5

bc3bafa2d2309860d70958bbcf317d9b
SHA1

0c06eee4ecdca1307bc9a521d06c10add0a9aa71
SHA256

7ee7dc8e21d3ac1964ba238f80d757f47ba6aaa5167644d92a1a3b8f3e2b4072
SHA512

15b184ec5774f1e32149dd430411a4e129a07137f3f4c27529eb60f23c66a4e14c22d9e3d6c9f54812ba3b6b141e03797106144fdbc3fb2c23add9dbfec0df04
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYao:qDdFJy3QMOtEvwDpjjWMl7Tdo

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1736-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e97a-13.dat	CryptoLocker_rule2
behavioral2/memory/1736-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4656-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1736-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e97a-13.dat	CryptoLocker_set1
behavioral2/memory/1736-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4656-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1736-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000001e97a-13.dat	UPX
behavioral2/memory/1736-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4656-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	2024-04-15_bc3bafa2d2309860d70958bbcf317d9b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4656	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1736-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000300000001e97a-13.dat	upx
behavioral2/memory/1736-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4656-26-0x0000000000500000-0x0000000000510000-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 1736 wrote to memory of 4656	1736	2024-04-15_bc3bafa2d2309860d70958bbcf317d9b_cryptolocker.exe	86
PID 1736 wrote to memory of 4656	1736	2024-04-15_bc3bafa2d2309860d70958bbcf317d9b_cryptolocker.exe	86
PID 1736 wrote to memory of 4656	1736	2024-04-15_bc3bafa2d2309860d70958bbcf317d9b_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-15_bc3bafa2d2309860d70958bbcf317d9b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_bc3bafa2d2309860d70958bbcf317d9b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1736
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4656

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
37KB

MD5
21cdccff736f2c8b32fe3c30b080703b

SHA1
c387a19ea189a3679a5373cac917e015e6196ef8

SHA256
2abd9f24189b7e5524c9d6804896c953ae05dc0979ed148247d0db108785c5b5

SHA512
586c0e11d3c95803ae71a1bc87c71188213fa58ca9235ded91fd8798b350b3588af652fd379bfbe8b7dfc2514ddbe454269dbaf04f6304313d61f1d57a4a8f3a

Download Submit
memory/1736-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1736-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1736-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1736-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/1736-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4656-19-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/4656-21-0x0000000001F60000-0x0000000001F66000-memory.dmp

Filesize
24KB

Download
memory/4656-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download