55145fb3c34be80187806a87a2818dab61836fa9d1a4a3afd693d32fa1c40085

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
01/02/2024, 16:42

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General

Target

2024-02-01_d2327dae7db21509f2895a9e23fbf291_cryptolocker.exe
Size

94KB
MD5

d2327dae7db21509f2895a9e23fbf291
SHA1

a4c6ad1c643151bff0b2b7b5fce828057e49e579
SHA256

55145fb3c34be80187806a87a2818dab61836fa9d1a4a3afd693d32fa1c40085
SHA512

7bc5cfbeba983e82a1e2724f5cd9f59fc0a69a6f8bd0730c2463d32f698f413302c7428b77eb859be2dff86e08451ba2ed99c8344151e6a86e8ccb8c22b78f26
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp01y+:AnBdOOtEvwDpj6zH

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1276-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002324a-13.dat	CryptoLocker_rule2
behavioral2/memory/1276-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/712-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1276-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002324a-13.dat	CryptoLocker_set1
behavioral2/memory/1276-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/712-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1276-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000700000002324a-13.dat	UPX
behavioral2/memory/1276-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/712-26-0x0000000000500000-0x000000000050F000-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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-02-01_d2327dae7db21509f2895a9e23fbf291_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
712	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1276-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000700000002324a-13.dat	upx
behavioral2/memory/1276-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/712-26-0x0000000000500000-0x000000000050F000-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 1276 wrote to memory of 712	1276	2024-02-01_d2327dae7db21509f2895a9e23fbf291_cryptolocker.exe	89
PID 1276 wrote to memory of 712	1276	2024-02-01_d2327dae7db21509f2895a9e23fbf291_cryptolocker.exe	89
PID 1276 wrote to memory of 712	1276	2024-02-01_d2327dae7db21509f2895a9e23fbf291_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-02-01_d2327dae7db21509f2895a9e23fbf291_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-01_d2327dae7db21509f2895a9e23fbf291_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1276
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:712

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
94KB

MD5
27c288a2968ef15592aea3af9a27591d

SHA1
2b472ae4ed33455e4c3c7274721b04f4240f55e4

SHA256
f0a3d547fd9afa7cb9e991eaf57fb375628843870ceedb621676d8d9ab612063

SHA512
685903d917e8b9baaa67a0543d4ca1cc38d3f26250d846b58ed322fa611977608f3fc364662e27935da2640e1bf27874b882e434a52d4d08de58631fc88e330b

Download Submit
memory/712-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/712-25-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/712-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1276-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1276-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1276-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1276-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1276-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download