70e8af88b09ac39f8163285a3f4a734ceca10bed8416b9fc0f2851c42da9abb1

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
08/04/2024, 12:54

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General

Target

2024-04-08_d9d661e105bf876d2ee1ae637dcd36e8_cryptolocker.exe
Size

45KB
MD5

d9d661e105bf876d2ee1ae637dcd36e8
SHA1

8882e084492189d0fd47e5c129a42c8e43e43dcd
SHA256

70e8af88b09ac39f8163285a3f4a734ceca10bed8416b9fc0f2851c42da9abb1
SHA512

6f6bd4c124ce38c382ba8b8611dc8a3dbc99e55a444f556ac2e7e562022ef675e985211b91933d984e763d8f3f3b5aede45d233c654500b977e1125090d37240
SSDEEP

768:P6LsoEEeegiZPvEhHS5+Mh/QtOOtEvwDpjBpaD3TUogs/VXpAPo9:P6QFElP6k+MRQMOtEvwDpjBQpVXz9

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2572-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000231ff-13.dat	CryptoLocker_rule2
behavioral2/memory/2572-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3888-26-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2572-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00080000000231ff-13.dat	CryptoLocker_set1
behavioral2/memory/2572-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3888-26-0x0000000000500000-0x000000000050B000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-04-08_d9d661e105bf876d2ee1ae637dcd36e8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3888	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 2572 wrote to memory of 3888	2572	2024-04-08_d9d661e105bf876d2ee1ae637dcd36e8_cryptolocker.exe	86
PID 2572 wrote to memory of 3888	2572	2024-04-08_d9d661e105bf876d2ee1ae637dcd36e8_cryptolocker.exe	86
PID 2572 wrote to memory of 3888	2572	2024-04-08_d9d661e105bf876d2ee1ae637dcd36e8_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-08_d9d661e105bf876d2ee1ae637dcd36e8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-08_d9d661e105bf876d2ee1ae637dcd36e8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2572
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3888

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
45KB

MD5
4be7df1164ccac9d15f3e219edcbf584

SHA1
7d8a7ed41427bf05847f07784af314edfefdab8e

SHA256
7920f85baf3bc99d713d8dc2c925c4c15432d3421201fb007e8f1b3102479540

SHA512
59af2365b2cdd54f9661dc22074fb06c6593b25e32ee78d3588ffc8f21cc78caa822ec63e52ad6ea3092f995008219dcd76af85e7aee9594bd18bd92420a5064

Download Submit
memory/2572-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/2572-1-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/2572-2-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/2572-3-0x0000000002240000-0x0000000002246000-memory.dmp

Filesize
24KB

Download
memory/2572-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3888-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3888-25-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/3888-26-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download