f4e9b9bda829c829f2c95806372995fb54a4ea26d6468004cabb7e2b129522dc

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 20:51

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General

Target

2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe
Size

52KB
MD5

44c689d573bd05048100598756e6d8cf
SHA1

8b47c15f6b29a2a43278ff01c6caa07bf2ca9d04
SHA256

f4e9b9bda829c829f2c95806372995fb54a4ea26d6468004cabb7e2b129522dc
SHA512

770982a29239e5af1aa2b2d0184d393decb307d049da159085b09eeba71a8ac9eb66daed99d587a840a0e41f8bba1eac4c58e12676cee06cd029e7d9057c9792
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOnI:bODOw9acifAoc+vsI

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/776-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\lossy.exe	CryptoLocker_rule2
behavioral2/memory/3556-18-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/776-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3556-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/776-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\lossy.exe	UPX
behavioral2/memory/3556-18-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/776-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/3556-27-0x0000000008000000-0x000000000800F000-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_44c689d573bd05048100598756e6d8cf_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

lossy.exe

pid process

3556 lossy.exe

pid	process
3556	lossy.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/776-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\lossy.exe	upx
behavioral2/memory/3556-18-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/776-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/3556-27-0x0000000008000000-0x000000000800F000-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_44c689d573bd05048100598756e6d8cf_cryptolocker.exe

description	pid	process	target process
PID 776 wrote to memory of 3556	776	2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe	lossy.exe
PID 776 wrote to memory of 3556	776	2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe	lossy.exe
PID 776 wrote to memory of 3556	776	2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe	lossy.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_44c689d573bd05048100598756e6d8cf_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:776
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:3556

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\lossy.exe

Filesize
52KB

MD5
6292c102925b911831a6a37dbd5ddac5

SHA1
44e0fd0491a7f474bfdffa6d73b82930d9163adb

SHA256
b7505b3b717c70f85da4842302b318b4edfa4ddb298c88920773804b84458d13

SHA512
7ed5ba8425af953438ec78ad044c771e3f506d2266087b339e94df8594eff2e719aca80a88b5df964212d684eb73596bf7cc53fdc2b1b67f126c7f6ea118d071

Download Submit
memory/776-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/776-1-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/776-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/776-9-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/776-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3556-18-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3556-20-0x0000000001F60000-0x0000000001F66000-memory.dmp

Filesize
24KB

Download
memory/3556-26-0x0000000001F40000-0x0000000001F46000-memory.dmp

Filesize
24KB

Download
memory/3556-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download