e395856761fb8ded58e91229383dabb754d4ee3d769a8ec40a62ffa62d0dc0eb

Analysis

max time kernel
148s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
31/05/2024, 20:45

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General

Target

2024-05-31_30faaad2f811a5c818ee16225635bc65_cryptolocker.exe
Size

59KB
MD5

30faaad2f811a5c818ee16225635bc65
SHA1

799724ef85f1abfbb55f055d84a88c0033bfb4ea
SHA256

e395856761fb8ded58e91229383dabb754d4ee3d769a8ec40a62ffa62d0dc0eb
SHA512

1135d8b3c2a8aa73f9940db23553f063144b410a360c6080da36207f7713f5b910953a68c89487dd8a0cc8177a4b363afc0fefe4a0acfe169ffd46298bfe75c5
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAPjM:H6QFElP6n+gou9cvMOtEvwDpjCpVXp

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4224-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002327d-13.dat	CryptoLocker_rule2
behavioral2/memory/4224-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2540-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4224-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002327d-13.dat	CryptoLocker_set1
behavioral2/memory/4224-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2540-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4224-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000002327d-13.dat	UPX
behavioral2/memory/4224-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2540-26-0x0000000000500000-0x0000000000510000-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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-05-31_30faaad2f811a5c818ee16225635bc65_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2540	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4224-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000700000002327d-13.dat	upx
behavioral2/memory/4224-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2540-26-0x0000000000500000-0x0000000000510000-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 4224 wrote to memory of 2540	4224	2024-05-31_30faaad2f811a5c818ee16225635bc65_cryptolocker.exe	81
PID 4224 wrote to memory of 2540	4224	2024-05-31_30faaad2f811a5c818ee16225635bc65_cryptolocker.exe	81
PID 4224 wrote to memory of 2540	4224	2024-05-31_30faaad2f811a5c818ee16225635bc65_cryptolocker.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-05-31_30faaad2f811a5c818ee16225635bc65_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_30faaad2f811a5c818ee16225635bc65_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4224
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2540

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
60KB

MD5
8b4e8ae8f3ef6a7edf29b2aaea61a005

SHA1
b81ddd3a8c8ccd133ce0bdba353ecc0b334ab3d5

SHA256
4637eb8ce03eb2ab0c471b140d6a26c945c862c7e2724332dc7b79b8d3152051

SHA512
c9978d12837489cba00047de568672c3ef28759dea4d346ce076b5db46b5d337b8b20c19f32dc8a82c1377153f430d09e69492c7fe5954a993ac2450486bf2ad

Download Submit
memory/2540-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/2540-25-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/2540-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4224-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4224-1-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/4224-2-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/4224-9-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/4224-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download