ad74bc2ef1a4981f2dbf8eefc41b129314edcbae503257a2f57f47067d324c8e

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27-02-2024 23:26

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General

Target

2024-02-27_4738d5ad97a6bf3cd36378e07693b6c0_cryptolocker.exe
Size

78KB
MD5

4738d5ad97a6bf3cd36378e07693b6c0
SHA1

42ecf4c795339bfa4eb204047f51b7d887f1adac
SHA256

ad74bc2ef1a4981f2dbf8eefc41b129314edcbae503257a2f57f47067d324c8e
SHA512

cb9705ace1c71f3e1fbf95d1011a24668cd5af14fc3f790b92c660829505d2d72cadac518c5c27fab544a6b4c357dc7251a2b67f5cc5699107233dce75b4f69c
SSDEEP

1536:vj+jsMQMOtEvwDpj5HwYYTjipvF2hBfIuf7GJ:vCjsIOtEvwDpj5H9YvQd2G

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000300000001e9a0-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000300000001e9a0-12.dat	CryptoLocker_set1

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-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation	2024-02-27_4738d5ad97a6bf3cd36378e07693b6c0_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation	misid.exe

Executes dropped EXE 1 IoCs

pid	Process
1492	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 4764 wrote to memory of 1492	4764	2024-02-27_4738d5ad97a6bf3cd36378e07693b6c0_cryptolocker.exe	90
PID 4764 wrote to memory of 1492	4764	2024-02-27_4738d5ad97a6bf3cd36378e07693b6c0_cryptolocker.exe	90
PID 4764 wrote to memory of 1492	4764	2024-02-27_4738d5ad97a6bf3cd36378e07693b6c0_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-02-27_4738d5ad97a6bf3cd36378e07693b6c0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-27_4738d5ad97a6bf3cd36378e07693b6c0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4764
- 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:1492

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\misid.exe

Filesize
78KB

MD5
cd12dff0187b2713778ccbcbaabc12eb

SHA1
6771486d318a2ea137cfd2d35bf4369826ef9dc5

SHA256
f99238e4ea5234e6ff4c306bb5d14735bda69075d822e5a3299fc0b62098131c

SHA512
bc049675e540b5af1e2a8b9b47a418dc35fc86d1858325d5fe8a2103dad1dda7549e69cdc0851893bdada31a421f605a4c95ab2cc393dc6cb28eb5c6d79e9f24

Download Submit
memory/1492-17-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1492-21-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4764-0-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4764-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4764-2-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download