d25f06530424d4f26135325c02c2f890d51b14171bb8eaff0c146e6004c22228

Analysis

max time kernel
102s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20250313-en
resource tags

arch:x64arch:x86image:win10v2004-20250313-enlocale:en-usos:windows10-2004-x64system
submitted
21/03/2025, 08:03

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General

Target

2025-03-21_b35283ccdd867905443e8970b6557eef_cryptolocker.exe
Size

20KB
MD5

b35283ccdd867905443e8970b6557eef
SHA1

a9734c0d5c9f8cf74a11d6c3c5414df1cea67221
SHA256

d25f06530424d4f26135325c02c2f890d51b14171bb8eaff0c146e6004c22228
SHA512

965c57ef9b1f0dbc865479d02dd722a5beedd518597a9d5f451c687aa98c9f01ad1d6cf4bad918db97e54f2be871256e5dd10f8f314942f6f128e63f375cfe58
SSDEEP

384:xG8OlX7EG+2LEjwg8SD6SSFYDTujQAf+hoGaQwbqqTn:xGFD1L/g9BSFYe0iv1Tn

Score

7^/10

discovery upx

Malware Config

Signatures

Checks computer location settings 2 TTPs 2 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-1-5-21-1279544337-3716153908-718418795-1000\Control Panel\International\Geo\Nation	2025-03-21_b35283ccdd867905443e8970b6557eef_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1279544337-3716153908-718418795-1000\Control Panel\International\Geo\Nation	pissa.exe

Executes dropped EXE 1 IoCs

pid	Process
2736	pissa.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2352-0-0x0000000008000000-0x000000000800C000-memory.dmp	upx
behavioral2/files/0x0006000000023381-13.dat	upx
behavioral2/memory/2352-17-0x0000000008000000-0x000000000800C000-memory.dmp	upx
behavioral2/memory/2736-42-0x0000000008000000-0x000000000800C000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pissa.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-03-21_b35283ccdd867905443e8970b6557eef_cryptolocker.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2352 wrote to memory of 2736	2352	2025-03-21_b35283ccdd867905443e8970b6557eef_cryptolocker.exe	88
PID 2352 wrote to memory of 2736	2352	2025-03-21_b35283ccdd867905443e8970b6557eef_cryptolocker.exe	88
PID 2352 wrote to memory of 2736	2352	2025-03-21_b35283ccdd867905443e8970b6557eef_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2025-03-21_b35283ccdd867905443e8970b6557eef_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2025-03-21_b35283ccdd867905443e8970b6557eef_cryptolocker.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2352
- C:\Users\Admin\AppData\Local\Temp\pissa.exe
  "C:\Users\Admin\AppData\Local\Temp\pissa.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2736

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\pissa.exe

Filesize
20KB

MD5
ea7498dfb8e8de0831786b3617ea50eb

SHA1
6da2021888eac88380111d510cda61c2744f1eb6

SHA256
73e5943c27eb0216b46ccc6c0fd6d64fce59dcab6ca134c8bf142e4d707e08a5

SHA512
0473c86d2fa5d0635734030748bac24ec3b97fe9b8df07eaa237c387c4c2a2750362875fce9f43a5ca06d1574bbd9d7f5563c974e6f530b814ca5c0238922584

Download Submit
C:\Users\Admin\AppData\Local\Temp\pissec.exe

Filesize
114B

MD5
e89f75f918dbdcee28604d4e09dd71d7

SHA1
f9d9055e9878723a12063b47d4a1a5f58c3eb1e9

SHA256
6dc9c7fc93bb488bb0520a6c780a8d3c0fb5486a4711aca49b4c53fac7393023

SHA512
8df0ab2e3679b64a6174deff4259ae5680f88e3ae307e0ea2dfff88ec4ba14f3477c9fe3a5aa5da3a8e857601170a5108ed75f6d6975958ac7a314e4a336aed0

Download Submit
memory/2352-0-0x0000000008000000-0x000000000800C000-memory.dmp

Filesize
48KB

Download
memory/2352-1-0x0000000002180000-0x0000000002186000-memory.dmp

Filesize
24KB

Download
memory/2352-2-0x0000000002180000-0x0000000002186000-memory.dmp

Filesize
24KB

Download
memory/2352-3-0x0000000003000000-0x0000000003006000-memory.dmp

Filesize
24KB

Download
memory/2352-17-0x0000000008000000-0x000000000800C000-memory.dmp

Filesize
48KB

Download
memory/2736-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2736-25-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/2736-42-0x0000000008000000-0x000000000800C000-memory.dmp

Filesize
48KB

Download