097f548154a9da627bbe0766bac12b9b7677323bed6e8b266785fcbdfb608bc6

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
17/04/2024, 10:38

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General

Target

2024-04-17_736c5cec89956ec9901ec4922ab8387c_cryptolocker.exe
Size

50KB
MD5

736c5cec89956ec9901ec4922ab8387c
SHA1

70f75893537d505b6beec78fd633d2186acd8e79
SHA256

097f548154a9da627bbe0766bac12b9b7677323bed6e8b266785fcbdfb608bc6
SHA512

f75be1eaf9de83ac966083f31dc2eacb92a7b3271aa06000f5805818e56c56d2cb6a63f5292b243b5b608373eb7061856a7470d294e658b1b07eb490230c4533
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtP:bODOw9acifAoc+vP

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4012-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002340c-13.dat	CryptoLocker_rule2
behavioral2/memory/4012-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2572-26-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4012-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x000700000002340c-13.dat	UPX
behavioral2/memory/4012-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/2572-26-0x0000000008000000-0x000000000800F000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1826666146-2574340311-1877551059-1000\Control Panel\International\Geo\Nation	2024-04-17_736c5cec89956ec9901ec4922ab8387c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2572	lossy.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4012-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x000700000002340c-13.dat	upx
behavioral2/memory/4012-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/2572-26-0x0000000008000000-0x000000000800F000-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

description	pid	Process	procid_target
PID 4012 wrote to memory of 2572	4012	2024-04-17_736c5cec89956ec9901ec4922ab8387c_cryptolocker.exe	85
PID 4012 wrote to memory of 2572	4012	2024-04-17_736c5cec89956ec9901ec4922ab8387c_cryptolocker.exe	85
PID 4012 wrote to memory of 2572	4012	2024-04-17_736c5cec89956ec9901ec4922ab8387c_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-17_736c5cec89956ec9901ec4922ab8387c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-17_736c5cec89956ec9901ec4922ab8387c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4012
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2572

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
50KB

MD5
833492506fde25eb0f5ca135ca0d8381

SHA1
41f4423735ae8399e4c66a7a64dbf942c1e77a0f

SHA256
986cf9fd7d9fca357241ff8341ad528991d5ab9dd87d5beb7662f82405eb38d4

SHA512
46e23b7fca94054b068112430004161e810bfa3bd8caf61e192a705e5a5dbe265d92ceecf91a624cfb960f410758e67d45deadd957fb5c0b83537b6c56ca6725

Download Submit
memory/2572-21-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/2572-19-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/2572-26-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4012-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4012-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/4012-2-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/4012-3-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/4012-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download