6a9e8a0922586da5baad1b5e5073ef1f45134a188285343018abb708ed409c83

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2024, 04:52

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General

Target

2024-02-19_7a8367a0f659c90adf1ea90debb34fbc_cryptolocker.exe
Size

70KB
MD5

7a8367a0f659c90adf1ea90debb34fbc
SHA1

3b6d002bba594554718e1222b4c6d78ef71b8405
SHA256

6a9e8a0922586da5baad1b5e5073ef1f45134a188285343018abb708ed409c83
SHA512

751d6a6b417658564601eb522595e6d93f2d7cf083f92c96436e138ebd51a01cc7e29d486588540eaf417ae826598ce02271b6fca344be5eaf736fbf872729e9
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKUtbgS5:DW60sllyWOtEvwDpjwF85l

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/3736-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002321a-13.dat	CryptoLocker_rule2
behavioral2/memory/3736-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/3736-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002321a-13.dat	CryptoLocker_set1
behavioral2/memory/3736-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

Checks computer location settings 2 TTPs 1 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-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	2024-02-19_7a8367a0f659c90adf1ea90debb34fbc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4408	asih.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 3736 wrote to memory of 4408	3736	2024-02-19_7a8367a0f659c90adf1ea90debb34fbc_cryptolocker.exe	83
PID 3736 wrote to memory of 4408	3736	2024-02-19_7a8367a0f659c90adf1ea90debb34fbc_cryptolocker.exe	83
PID 3736 wrote to memory of 4408	3736	2024-02-19_7a8367a0f659c90adf1ea90debb34fbc_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-19_7a8367a0f659c90adf1ea90debb34fbc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_7a8367a0f659c90adf1ea90debb34fbc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3736
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4408

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\asih.exe

Filesize
71KB

MD5
a18474675339d4fb4759c1dd3b8ece2e

SHA1
c5edf73a1f94e100039df870fcf67b1fe9826054

SHA256
c0ae9e5af026532179b9ae62141e235ca37187d0a7ebee59c2dd492f2515244b

SHA512
aad8110b0415c6d07b8de4d04b2fffac5cbe828306c1c0df4b9ec4aa3b2c0a3d823d54c5585819544b5010acb871ba0cffac7d07e73f25f1b2272378fea03e5d

Download Submit
memory/3736-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3736-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/3736-2-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/3736-3-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/3736-18-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4408-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4408-25-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download