f19c0d878ef868ee19cf3bf9c3879c2568d4821e2429b99686059a8f1528d0c7

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
12/03/2024, 01:56

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General

Target

2024-03-12_bee6a316be130c0aa5e275fd2e3dd81e_cryptolocker.exe
Size

30KB
MD5

bee6a316be130c0aa5e275fd2e3dd81e
SHA1

fbb961bbc6772c029157d65c5d3d2a98f0bc5231
SHA256

f19c0d878ef868ee19cf3bf9c3879c2568d4821e2429b99686059a8f1528d0c7
SHA512

f0e988d7559cdcce12ee1435a5dacee8526b6e94378edd8a6c08bbd6597d0eaacd156641f9ed9cd4fe21c8262b5cdc31d1685cf50c1497f0c4bf1e5a008f9b69
SSDEEP

768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIO/xuhx:q0zizzOSxMOtEvwDpj/arQH

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2352-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e9a0-13.dat	CryptoLocker_rule2
behavioral2/memory/2352-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1104-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/2352-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1104-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2352-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000001e9a0-13.dat	UPX
behavioral2/memory/2352-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1104-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

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-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation	2024-03-12_bee6a316be130c0aa5e275fd2e3dd81e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1104	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 2352 wrote to memory of 1104	2352	2024-03-12_bee6a316be130c0aa5e275fd2e3dd81e_cryptolocker.exe	89
PID 2352 wrote to memory of 1104	2352	2024-03-12_bee6a316be130c0aa5e275fd2e3dd81e_cryptolocker.exe	89
PID 2352 wrote to memory of 1104	2352	2024-03-12_bee6a316be130c0aa5e275fd2e3dd81e_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-03-12_bee6a316be130c0aa5e275fd2e3dd81e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-12_bee6a316be130c0aa5e275fd2e3dd81e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2352
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1104

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
30KB

MD5
57c1d1e8bec615d5f872352b595e10bd

SHA1
52f44ef1eb134d0aaac82852046bee0d13f0ea5d

SHA256
8f5661c9a46f46f3fee802344738ac4da1edd2e513f4cc5771c7695fe4cff900

SHA512
28e6d0e1602bfa4b4b995577670dd50d5cae47454e5900c34acfd4a4481ebd45469dca21a9c6a24ffd1bdd7e7cc6dc2a98b628495ca6beca955bc2c76b919a2e

Download Submit
memory/1104-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2352-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2352-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2352-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2352-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2352-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download