f7c3dfa12b25de93ef2855cbe051ce717681dd62f38c3b896a48215aa9e5ce6e

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 22:31

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General

Target

2024-05-22_97d572bf1217b39e61c5475f4f996d87_cryptolocker.exe
Size

79KB
MD5

97d572bf1217b39e61c5475f4f996d87
SHA1

72e15b7d4a54cc30d130e8adfe4a2f5a1891f68b
SHA256

f7c3dfa12b25de93ef2855cbe051ce717681dd62f38c3b896a48215aa9e5ce6e
SHA512

4cb390bfa82d2933b6d3d74ebfe113274d82149d73ff4b5c62437ec754229f6462d5b0f3fad1494adc07256ed9788772849916a4cff0a49a5f0f34e06246d095
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxB1U:T6a+rdOOtEvwDpjNtHP/

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3076-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3076-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2292-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3076-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3076-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2292-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3076-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3076-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2292-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_97d572bf1217b39e61c5475f4f996d87_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	2024-05-22_97d572bf1217b39e61c5475f4f996d87_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2292 asih.exe

pid	process
2292	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3076-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/3076-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2292-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_97d572bf1217b39e61c5475f4f996d87_cryptolocker.exe

description	pid	process	target process
PID 3076 wrote to memory of 2292	3076	2024-05-22_97d572bf1217b39e61c5475f4f996d87_cryptolocker.exe	asih.exe
PID 3076 wrote to memory of 2292	3076	2024-05-22_97d572bf1217b39e61c5475f4f996d87_cryptolocker.exe	asih.exe
PID 3076 wrote to memory of 2292	3076	2024-05-22_97d572bf1217b39e61c5475f4f996d87_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_97d572bf1217b39e61c5475f4f996d87_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_97d572bf1217b39e61c5475f4f996d87_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3076
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2292

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
79KB

MD5
663f27d597a89ae19da26187e293e0fb

SHA1
ee84b5d53ef9f59f6125f93b2717a6c69a16b131

SHA256
68ec8d1e335189635c97d4bc988ed1f8daca28afcac00548d46dfb851e12dc64

SHA512
fd562ab9e26c2cb9aaba7954ef318789a0a541d188c8af2950d42c2bff9a7ecece95e9389d430d54bd652df4cd31a73efdc0e0007912e59c4c205223900d9640

Download Submit
memory/2292-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2292-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2292-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3076-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3076-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/3076-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/3076-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3076-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download