cfc522c86dc5c88f79f8309e39526eba68c561c337f7cc9ac7cdfcd9e3133943

Analysis

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

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
03-04-2024 06:43

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General

Target

2024-04-03_8977a92816cbe7f7d8210c29e100bffc_cryptolocker.exe
Size

44KB
MD5

8977a92816cbe7f7d8210c29e100bffc
SHA1

838cf97276fc5a42928fe73178920cf8ea714eeb
SHA256

cfc522c86dc5c88f79f8309e39526eba68c561c337f7cc9ac7cdfcd9e3133943
SHA512

5205a2f183ae84415035ec4430dd768731ada24acdb9c624f5eec2960186ecabe300b00405909ee804969dff8089b414de5fafc65913df3632ba55a9ffbe8e8c
SSDEEP

768:bxNQIE0eBhkL2Fo1CCwgfjOg1tsJ6zeen754XcwxbFqRoN6e:bxNrC7kYo1Fxf3s05rwxbFvN6e

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

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

Processes:

2024-04-03_8977a92816cbe7f7d8210c29e100bffc_cryptolocker.exepissa.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	2024-04-03_8977a92816cbe7f7d8210c29e100bffc_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	pissa.exe

Executes dropped EXE 1 IoCs

Processes:

pissa.exe

pid process

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

System Information Discovery
T1082

pid	process
820	pissa.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-03_8977a92816cbe7f7d8210c29e100bffc_cryptolocker.exe

description	pid	process	target process
PID 4352 wrote to memory of 820	4352	2024-04-03_8977a92816cbe7f7d8210c29e100bffc_cryptolocker.exe	pissa.exe
PID 4352 wrote to memory of 820	4352	2024-04-03_8977a92816cbe7f7d8210c29e100bffc_cryptolocker.exe	pissa.exe
PID 4352 wrote to memory of 820	4352	2024-04-03_8977a92816cbe7f7d8210c29e100bffc_cryptolocker.exe	pissa.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-03_8977a92816cbe7f7d8210c29e100bffc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-03_8977a92816cbe7f7d8210c29e100bffc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4352

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:820

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\pissa.exe

Filesize
44KB

MD5
7ab94442c197f7be2eec50de53d97f7d

SHA1
157cf071b2cbb8d1b03663475241bcb5ccd6d36d

SHA256
a50d69441caa8916307ad803606190905df7ced64b95e3c41b9f621143a86e80

SHA512
6dc8140cfe04779f890d3ee35885c100ea6e942acd0a40a4158351167f512bfffc0e18543b1a1f699e9b29131909601145b46def958b12e566a63ad3f6d73ba0

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

Filesize
261B

MD5
11bed1c06d8f4680de5154405be20365

SHA1
9c3095f1aa0b02924c23592d1e86673bb0081ca1

SHA256
bcc0582f122db6e61d2aa06628275f5b882c01ca037699427d0f68e48d744666

SHA512
050bb38ff33ab7e8e8aa647cffb26d2b0a54074340e79f0acf0db8f076c421505f1e4c1ce169d55aeacd4085ce258a78d24327c9393650642963beb130517da8

Download Submit
memory/820-17-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/820-19-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/4352-0-0x0000000002260000-0x0000000002266000-memory.dmp

Filesize
24KB

Download
memory/4352-2-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/4352-1-0x0000000002260000-0x0000000002266000-memory.dmp

Filesize
24KB

Download