4c257d3eac18f4680fea00029dbcd01632529ca68c44084e10bd95fbec7f1ffd

Analysis

max time kernel
91s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
04-04-2024 22:30

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General

Target

2024-04-04_8fa7d4b4321c5be1ac51f654059a19b2_cryptolocker.exe
Size

45KB
MD5

8fa7d4b4321c5be1ac51f654059a19b2
SHA1

4814b68d222214f54898518d5176a14d14221da7
SHA256

4c257d3eac18f4680fea00029dbcd01632529ca68c44084e10bd95fbec7f1ffd
SHA512

f490b1047f534f06918222380dcc9109c953ddeba9ea65a718fe905f04ec0316d91e7338753e00f9f7cba9d7cef44f1465ce3c196f29e9e5a6b43c6ad290f4e0
SSDEEP

768:bxNQIE0eBhkL2Fo1CCwgfjOg1tsJ6zeen754XcwxbFp1Yvb9NpD4:bxNrC7kYo1Fxf3s05rwxbF7YvbXpk

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000a000000023196-12.dat	CryptoLocker_rule2

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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	2024-04-04_8fa7d4b4321c5be1ac51f654059a19b2_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	pissa.exe

Executes dropped EXE 1 IoCs

pid	Process
4820	pissa.exe

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 5000 wrote to memory of 4820	5000	2024-04-04_8fa7d4b4321c5be1ac51f654059a19b2_cryptolocker.exe	87
PID 5000 wrote to memory of 4820	5000	2024-04-04_8fa7d4b4321c5be1ac51f654059a19b2_cryptolocker.exe	87
PID 5000 wrote to memory of 4820	5000	2024-04-04_8fa7d4b4321c5be1ac51f654059a19b2_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-04-04_8fa7d4b4321c5be1ac51f654059a19b2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-04_8fa7d4b4321c5be1ac51f654059a19b2_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5000
- C:\Users\Admin\AppData\Local\Temp\pissa.exe
  "C:\Users\Admin\AppData\Local\Temp\pissa.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:4820

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

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Downloads

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

Filesize
45KB

MD5
7ce5227d8109817d06faa36d57cee004

SHA1
177edfde7e7d1a681a7e7a8876239b9b5814e23e

SHA256
cda3ab9501e77a0710700f46176a2bd877338aa3eaa926b372d9aefb9be8d37f

SHA512
a042dfde497da6cbddd3b355f43f11f3e3091fd73e379e4e6fa3cfaa47ffb7524b163f7528fb427c1bcd66639e163cf965838f6c3e29cd2ebdd13579ee91aa8a

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

Filesize
261B

MD5
11bed1c06d8f4680de5154405be20365

SHA1
9c3095f1aa0b02924c23592d1e86673bb0081ca1

SHA256
bcc0582f122db6e61d2aa06628275f5b882c01ca037699427d0f68e48d744666

SHA512
050bb38ff33ab7e8e8aa647cffb26d2b0a54074340e79f0acf0db8f076c421505f1e4c1ce169d55aeacd4085ce258a78d24327c9393650642963beb130517da8

Download Submit
memory/4820-18-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/5000-0-0x0000000002180000-0x0000000002186000-memory.dmp

Filesize
24KB

Download
memory/5000-1-0x0000000002180000-0x0000000002186000-memory.dmp

Filesize
24KB

Download
memory/5000-2-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download