2bf2bbfc68bbcb4d7ddc2c39da394a8b0fd195eba82bd9e2ef1cda9c4419159f

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
20/05/2024, 06:34

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General

Target

2024-05-20_4cfcb7d8d1c4fd897dc6e1c52720fa0a_cryptolocker.exe
Size

46KB
MD5

4cfcb7d8d1c4fd897dc6e1c52720fa0a
SHA1

b5bc2b0b1422ddeb69897ab8c3ca65d0a5f06967
SHA256

2bf2bbfc68bbcb4d7ddc2c39da394a8b0fd195eba82bd9e2ef1cda9c4419159f
SHA512

ae03edd38819074bc2e4711ca4ad5bb628d4cb19d5d32a3e09bba0244bd641848b6ba691453c4aa1d5c66da41bd492a3aecbd4b9f6cca41d6f68718a961b722d
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoLY:qmbhXDmjr5MOtEvwDpj5cDtKkQZQu

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1112-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023297-13.dat	CryptoLocker_rule2
behavioral2/memory/2920-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1112-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2920-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/2920-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1112-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2920-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1112-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023297-13.dat	UPX
behavioral2/memory/2920-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1112-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2920-27-0x0000000000500000-0x0000000000510000-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-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	2024-05-20_4cfcb7d8d1c4fd897dc6e1c52720fa0a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2920	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 1112 wrote to memory of 2920	1112	2024-05-20_4cfcb7d8d1c4fd897dc6e1c52720fa0a_cryptolocker.exe	82
PID 1112 wrote to memory of 2920	1112	2024-05-20_4cfcb7d8d1c4fd897dc6e1c52720fa0a_cryptolocker.exe	82
PID 1112 wrote to memory of 2920	1112	2024-05-20_4cfcb7d8d1c4fd897dc6e1c52720fa0a_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-20_4cfcb7d8d1c4fd897dc6e1c52720fa0a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-20_4cfcb7d8d1c4fd897dc6e1c52720fa0a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1112
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2920

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
46KB

MD5
6bd97ade1425ccd413bd55645d732401

SHA1
dc0df8762fc343b113a8a9e0d1cc51c5f9c2b422

SHA256
4ecfe6ceab22e3cfcc7f3c2a581c6f5aeca99158b9634da01dddc4c66aebdc1e

SHA512
a72da67bd66bacf213f8ba6b42d7142193cf8a98bfec3bbd0211654a656ece37d41a75633408715e8dc96fb2ff14004ec8c0d01958ec5142ad756a55b916c39a

Download Submit
memory/1112-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1112-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1112-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1112-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1112-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2920-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2920-26-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/2920-20-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/2920-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download