7b426bd77edbf0ab30ed4610ade852301caebd615a1b787e0ad46f86e26d6d5b

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27/03/2024, 03:30

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General

Target

2024-03-27_213f3186108253149d7de820b9a666cc_cryptolocker.exe
Size

64KB
MD5

213f3186108253149d7de820b9a666cc
SHA1

c2805055ebbc8058696e6b2d1adb1faee6a30759
SHA256

7b426bd77edbf0ab30ed4610ade852301caebd615a1b787e0ad46f86e26d6d5b
SHA512

1962195b972fcb7fd4e8d21a4559c3ee73ef3bf5c59ec533ac3f2f914f01a283338655fdc34ec78af32af50e64205fb1ef5e4244b111ceb2fd6bca1344d7ec3a
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAo5:1nK6a+qdOOtEvwDpjX

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/772-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000500000001e735-13.dat	CryptoLocker_rule2
behavioral2/memory/772-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/440-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/772-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000500000001e735-13.dat	CryptoLocker_set1
behavioral2/memory/772-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/440-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/772-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000500000001e735-13.dat	UPX
behavioral2/memory/772-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/440-26-0x0000000000500000-0x000000000050F311-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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	2024-03-27_213f3186108253149d7de820b9a666cc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
440	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/772-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000500000001e735-13.dat	upx
behavioral2/memory/772-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/440-26-0x0000000000500000-0x000000000050F311-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 772 wrote to memory of 440	772	2024-03-27_213f3186108253149d7de820b9a666cc_cryptolocker.exe	92
PID 772 wrote to memory of 440	772	2024-03-27_213f3186108253149d7de820b9a666cc_cryptolocker.exe	92
PID 772 wrote to memory of 440	772	2024-03-27_213f3186108253149d7de820b9a666cc_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-03-27_213f3186108253149d7de820b9a666cc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-27_213f3186108253149d7de820b9a666cc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:772
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:440

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
64KB

MD5
994b2f76c7beb991dff74b9f207b8e34

SHA1
50b88667541e611f3cf5fdbdf80316bdacf13241

SHA256
1ded014690a1eb483302cef1b34e3c96e87f63015a78efa335179cb4a68c9875

SHA512
1836eb5f45de85029628f3f9c5b213bfb935670996592a42933742e1f1a36209ceb56db25a91f65249a6e6d8d812e02d23f3c328f925049f451aae6603371a43

Download Submit
memory/440-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/440-23-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/440-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/772-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/772-1-0x0000000000690000-0x0000000000696000-memory.dmp

Filesize
24KB

Download
memory/772-2-0x0000000000690000-0x0000000000696000-memory.dmp

Filesize
24KB

Download
memory/772-3-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/772-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download