0f58d3a783d8354331bb218e250df2dea605825d2fbb4832ea24957d1e739940

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
31/05/2024, 06:25

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General

Target

2024-05-31_1a4cc52e1bd1864f19160b5ce581ace1_cryptolocker.exe
Size

91KB
MD5

1a4cc52e1bd1864f19160b5ce581ace1
SHA1

483537b0276d2264f70fdddf75603b186cd7582b
SHA256

0f58d3a783d8354331bb218e250df2dea605825d2fbb4832ea24957d1e739940
SHA512

6778b8fb5ffb779cb9683a8ecb14969ee61e31281e123144365c2f20a96764f213e5df87651effd64616add557edac00053164f095f705d3dbca9323d684f18e
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/E:n6a+1SEOtEvwDpjYYvQd2PL

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3612-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002342c-13.dat	CryptoLocker_rule2
behavioral2/memory/3612-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1952-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3612-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002342c-13.dat	CryptoLocker_set1
behavioral2/memory/3612-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1952-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3612-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002342c-13.dat	UPX
behavioral2/memory/3612-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1952-26-0x0000000000500000-0x0000000000510000-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	2024-05-31_1a4cc52e1bd1864f19160b5ce581ace1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1952	asih.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3612-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000800000002342c-13.dat	upx
behavioral2/memory/3612-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1952-26-0x0000000000500000-0x0000000000510000-memory.dmp	upx

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 3612 wrote to memory of 1952	3612	2024-05-31_1a4cc52e1bd1864f19160b5ce581ace1_cryptolocker.exe	81
PID 3612 wrote to memory of 1952	3612	2024-05-31_1a4cc52e1bd1864f19160b5ce581ace1_cryptolocker.exe	81
PID 3612 wrote to memory of 1952	3612	2024-05-31_1a4cc52e1bd1864f19160b5ce581ace1_cryptolocker.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-05-31_1a4cc52e1bd1864f19160b5ce581ace1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_1a4cc52e1bd1864f19160b5ce581ace1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3612
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1952

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
91KB

MD5
245eaf9b60cbe0cb8452e00c158330a3

SHA1
ac612e5582698ecb743860811c5a888617e59f8d

SHA256
d51891bab8abe993ccb7f4f6d3cadd2a741fdbc3a0d77360c07945372396f5e5

SHA512
c2260f78cdd04b1a7139bb23504cffc087c6f514489a35a84b6d990e07cbca39463003eb51f30a324e5d441b0a8980d37d81ca14559a19ec91c72960531c4cfc

Download Submit
memory/1952-25-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/1952-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/1952-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3612-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3612-1-0x0000000000840000-0x0000000000846000-memory.dmp

Filesize
24KB

Download
memory/3612-3-0x0000000000860000-0x0000000000866000-memory.dmp

Filesize
24KB

Download
memory/3612-9-0x0000000000840000-0x0000000000846000-memory.dmp

Filesize
24KB

Download
memory/3612-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download