b8747794ae2a734a0f4b82b831bd177da65dbea3e72baf3ffd21c7a825c03a05

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
29-04-2024 03:43

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General

Target

2024-04-29_8e1891f40d200dae8a9a9745a7b09d30_cryptolocker.exe
Size

89KB
MD5

8e1891f40d200dae8a9a9745a7b09d30
SHA1

121a54696d0b07cf84a8eeb7f31f0925aac787cb
SHA256

b8747794ae2a734a0f4b82b831bd177da65dbea3e72baf3ffd21c7a825c03a05
SHA512

4fc6c30b61b3c2ea63d0aab54fe45bb5e524fef48d2b67d9dd21b8078fea7a016a4b81f457d9a65fb25161a3554391c42620c907ceed10cee52561834827f975
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAM:n6a+1SEOtEvwDpjYYvQd2PM

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/920-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023b25-13.dat	CryptoLocker_rule2
behavioral2/memory/920-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/968-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/920-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000d000000023b25-13.dat	CryptoLocker_set1
behavioral2/memory/920-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/968-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/920-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000d000000023b25-13.dat	UPX
behavioral2/memory/920-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/968-26-0x0000000000500000-0x0000000000510000-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-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	2024-04-29_8e1891f40d200dae8a9a9745a7b09d30_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
968	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/920-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000d000000023b25-13.dat	upx
behavioral2/memory/920-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/968-26-0x0000000000500000-0x0000000000510000-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 920 wrote to memory of 968	920	2024-04-29_8e1891f40d200dae8a9a9745a7b09d30_cryptolocker.exe	83
PID 920 wrote to memory of 968	920	2024-04-29_8e1891f40d200dae8a9a9745a7b09d30_cryptolocker.exe	83
PID 920 wrote to memory of 968	920	2024-04-29_8e1891f40d200dae8a9a9745a7b09d30_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-04-29_8e1891f40d200dae8a9a9745a7b09d30_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-29_8e1891f40d200dae8a9a9745a7b09d30_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:920
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:968

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
89KB

MD5
a1affe8833689fd47cd04dab768a6b57

SHA1
4c5ca31196c767f8def7d2c33559a6a6fa787409

SHA256
1ae4d5b20bf29a7d14996c29226bd37842f88b55541b90bc3417bc1b21754d83

SHA512
4ddf822d5ced9fc7e416537be2f45f43a7c46344d0831a5c216eaa363110c900b869d47a98a2e0e4e9e25b0e58ecfc70af1f7e6acc6a90f5ed53efbe2bc50420

Download Submit
memory/920-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/920-1-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/920-2-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/920-9-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/920-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/968-20-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/968-25-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/968-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download