b8743ecbf34a52abdba0d9cfadfa3250e630cc465006a28763f514deb9bbedfd

Analysis

max time kernel
149s
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
28-03-2024 19:37

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General

Target

2024-03-28_bc3d7c3722ca929e0126d61f393f4fc1_cryptolocker.exe
Size

40KB
MD5

bc3d7c3722ca929e0126d61f393f4fc1
SHA1

45701cc53fe47466f0abdff53b8e6a23dca7cdf6
SHA256

b8743ecbf34a52abdba0d9cfadfa3250e630cc465006a28763f514deb9bbedfd
SHA512

7d4d78696587d10104dcdc173fc447fe34a22f246cceb762955ea0e1c7ff57e76a69ed3f20743e0e4da5738f4cb7dbab730f5a0f84ee80a350c37df1b16fa62a
SSDEEP

768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjLenQLJJziCs:ZzFbxmLPWQMOtEvwDpjLeU3C

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023238-13.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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-03-28_bc3d7c3722ca929e0126d61f393f4fc1_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	misid.exe

Executes dropped EXE 1 IoCs

pid	Process
4800	misid.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 2676 wrote to memory of 4800	2676	2024-03-28_bc3d7c3722ca929e0126d61f393f4fc1_cryptolocker.exe	87
PID 2676 wrote to memory of 4800	2676	2024-03-28_bc3d7c3722ca929e0126d61f393f4fc1_cryptolocker.exe	87
PID 2676 wrote to memory of 4800	2676	2024-03-28_bc3d7c3722ca929e0126d61f393f4fc1_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-03-28_bc3d7c3722ca929e0126d61f393f4fc1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_bc3d7c3722ca929e0126d61f393f4fc1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2676
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:4800

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\misid.exe

Filesize
40KB

MD5
f04f0279183aaa21cb83ef150f5c7bc9

SHA1
f2887c45e26c4fcb430f0332d4eb34d642458027

SHA256
3819de93f259c16e864f384efdaa1357847e43730cf443eaf95b2009d47e6827

SHA512
2beeb8175479a5ca767fafd22ceb4626fb55a07e52f383285bf184b027eea7a8d31694c0bc5ad500e41d3346d4bf9853f6d45b30d06b646b25d0e68c4b45f51b

Download Submit
memory/2676-0-0x00000000004E0000-0x00000000004E3000-memory.dmp

Filesize
12KB

Download
memory/2676-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2676-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2676-3-0x0000000000790000-0x0000000000796000-memory.dmp

Filesize
24KB

Download
memory/2676-19-0x00000000004E0000-0x00000000004E3000-memory.dmp

Filesize
12KB

Download
memory/4800-17-0x00000000004E0000-0x00000000004E3000-memory.dmp

Filesize
12KB

Download
memory/4800-20-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/4800-21-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download