f8a26bd30ddb718dba4716263737a16bf05759fc8c7b821144d6fd544851d852

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2024, 11:52

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General

Target

2024-02-19_b4dffb050cc6ff97fbc72e618fa70ad7_cryptolocker.exe
Size

62KB
MD5

b4dffb050cc6ff97fbc72e618fa70ad7
SHA1

b8dd7c4d366656a34eff0e5de76e4053d223f74b
SHA256

f8a26bd30ddb718dba4716263737a16bf05759fc8c7b821144d6fd544851d852
SHA512

02d598b8feb3e7debc65515f9bab61919fe65391cae82fb97dc2e3a913ab4fe75608983c3c5b6f056421865e42ccd45c9bf14528485ff39414c75a5f54d5ba92
SSDEEP

768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mnVG:zj+soPSMOtEvwDpj4kpmeLmng

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/60-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023167-13.dat	CryptoLocker_rule2
behavioral2/memory/60-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1476-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1476-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/60-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000d000000023167-13.dat	CryptoLocker_set1
behavioral2/memory/60-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1476-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1476-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/60-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000d000000023167-13.dat	UPX
behavioral2/memory/60-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1476-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1476-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	2024-02-19_b4dffb050cc6ff97fbc72e618fa70ad7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1476	misid.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/60-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000d000000023167-13.dat	upx
behavioral2/memory/60-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1476-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1476-27-0x0000000000500000-0x0000000000510000-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 60 wrote to memory of 1476	60	2024-02-19_b4dffb050cc6ff97fbc72e618fa70ad7_cryptolocker.exe	84
PID 60 wrote to memory of 1476	60	2024-02-19_b4dffb050cc6ff97fbc72e618fa70ad7_cryptolocker.exe	84
PID 60 wrote to memory of 1476	60	2024-02-19_b4dffb050cc6ff97fbc72e618fa70ad7_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-19_b4dffb050cc6ff97fbc72e618fa70ad7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_b4dffb050cc6ff97fbc72e618fa70ad7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:60
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:1476

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\misid.exe

Filesize
62KB

MD5
4ce83802b7bff6460d4c0a597081bc96

SHA1
da07f2075dbbe4515bc9cefaba9045d2ef691372

SHA256
56e50253bc49e292f52ac5500241d8ba9ba01fbaf1ff08d443f34062e11eaab7

SHA512
5e420483745da7c8e04f2f7330c0fc600d0db2636ba73559c42e0f926a1f685c6d42e25162aeb8bfda1aadc5f1c6e084301f27023418e6dc7c2b63697855432c

Download Submit
memory/60-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/60-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/60-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/60-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/60-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1476-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1476-22-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1476-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1476-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download