bbd3efce897c8fbec057476c6f57bbf9f05f71c0a22203b01accabb8115ae354

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
29/04/2024, 02:43

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General

Target

2024-04-29_ed16157ea6ee0bf39aa7436ca4916d39_cryptolocker.exe
Size

50KB
MD5

ed16157ea6ee0bf39aa7436ca4916d39
SHA1

e58682fd56e91e71bfd4685fdcba3cba65306562
SHA256

bbd3efce897c8fbec057476c6f57bbf9f05f71c0a22203b01accabb8115ae354
SHA512

df1365034e1917bd10d0c7fee3d2eddffc84c5e5ba79337ea475cafc9ab402826ee38aacfa875fc1cabb60071a467c8d30d269086d4176b62a39c1449bdaa18e
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoccL:qmbhXDmjr5MOtEvwDpj5cDtKkQZQt

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4168-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023289-13.dat	CryptoLocker_rule2
behavioral2/memory/4168-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1420-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4168-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1420-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4168-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023289-13.dat	UPX
behavioral2/memory/4168-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1420-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2024-04-29_ed16157ea6ee0bf39aa7436ca4916d39_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1420	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 4168 wrote to memory of 1420	4168	2024-04-29_ed16157ea6ee0bf39aa7436ca4916d39_cryptolocker.exe	83
PID 4168 wrote to memory of 1420	4168	2024-04-29_ed16157ea6ee0bf39aa7436ca4916d39_cryptolocker.exe	83
PID 4168 wrote to memory of 1420	4168	2024-04-29_ed16157ea6ee0bf39aa7436ca4916d39_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-04-29_ed16157ea6ee0bf39aa7436ca4916d39_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-29_ed16157ea6ee0bf39aa7436ca4916d39_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4168
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1420

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
50KB

MD5
7e150e40acd4c9b5e1751a99cab0f5a3

SHA1
522bb342f2f634185b21ce4ad87424bed75c0fc0

SHA256
c93d7d3c69c569954ee28dfa01060fbc4ff1a3350fe1804d3849c91e1cedd7f5

SHA512
52e37be1b03f347c47945e8e04ea597922fec4ff71297718de629937be818227d80ec77f1834a7a9792f92d605d6996da10494b8e366a4baca4daf33fd833393

Download Submit
memory/1420-19-0x0000000001F60000-0x0000000001F66000-memory.dmp

Filesize
24KB

Download
memory/1420-25-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/1420-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4168-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4168-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4168-3-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4168-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4168-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download