ac987cd1afffbd4f6571db3acdf3ab59f1210435b6e097d0b8750d96115b172e

Analysis

max time kernel
149s
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
11/04/2024, 03:54

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General

Target

2024-04-11_d9ccf735a696896f0dc66ab57a607344_cryptolocker.exe
Size

45KB
MD5

d9ccf735a696896f0dc66ab57a607344
SHA1

9c7dc51bc4dac88772c019f2ea228b6403cc5e46
SHA256

ac987cd1afffbd4f6571db3acdf3ab59f1210435b6e097d0b8750d96115b172e
SHA512

75826679909a30a5b6d3e775e3ebcf573eac4dc791672f8eeb5fc6d964b77e76b7697bdf82d450abc5bf558e37419c49f1532418487a951d97cd5173d1c845e9
SSDEEP

768:P6LsoVEeegiZPvEhHSP+gp/QtOOtEvwDpjBBMLZdzuqpXsiE8Wq/DpkK:P6Q0ElP6G+gJQMOtEvwDpjB8WMlN

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3008-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000f00000002314a-13.dat	CryptoLocker_rule2
behavioral2/memory/3008-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/632-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/632-27-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3008-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000f00000002314a-13.dat	CryptoLocker_set1
behavioral2/memory/3008-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/632-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/632-27-0x0000000000500000-0x000000000050B000-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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	2024-04-11_d9ccf735a696896f0dc66ab57a607344_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
632	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 3008 wrote to memory of 632	3008	2024-04-11_d9ccf735a696896f0dc66ab57a607344_cryptolocker.exe	83
PID 3008 wrote to memory of 632	3008	2024-04-11_d9ccf735a696896f0dc66ab57a607344_cryptolocker.exe	83
PID 3008 wrote to memory of 632	3008	2024-04-11_d9ccf735a696896f0dc66ab57a607344_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-04-11_d9ccf735a696896f0dc66ab57a607344_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-11_d9ccf735a696896f0dc66ab57a607344_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3008
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:632

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
41b37d43602ccc62249569aaabb6bcab

SHA1
fc1aebc93e52a64539158fe5c62de5cb6433eaf5

SHA256
32cb512d928dce7c21a90d16de1190cbe12646c73734e4654fc824e8c90ff17a

SHA512
d74965773dae8ca5f6d1270802a2d5657c924d0ae3e51fca7702f9f636f96567d8f677dd6f74e08e3b20a1c927b65ebb0fb8533739d5efd78ab2489af328dc82

Download Submit
memory/632-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/632-20-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/632-22-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/632-27-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3008-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3008-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3008-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3008-3-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/3008-18-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download