e247b2c843f708ba0e80c544ddb3b0aeb15da5cc79007d50ec01c5b69c78f258

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
23/02/2024, 23:28

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General

Target

2024-02-23_4e1c88a16a135fbfc29a99f401149ffc_cryptolocker.exe
Size

47KB
MD5

4e1c88a16a135fbfc29a99f401149ffc
SHA1

80803ae553b26cf28e7d62ff55f88f074427c370
SHA256

e247b2c843f708ba0e80c544ddb3b0aeb15da5cc79007d50ec01c5b69c78f258
SHA512

76bb0fa0af670c1c2019d0e67cbbbdc647d95d8e3530e820bf8aa0dc0fb8e0e4fd7654bf7192c4d5f8a2f491dd47bea39e315db9c4d79c7f2517ea926a709eed
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mo2pn:qmbhXDmjr5MOtEvwDpj5cDtKkQZQe

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/0x000b00000001e597-13.dat	CryptoLocker_rule2
behavioral2/memory/4168-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5348-25-0x0000000000500000-0x0000000000510000-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/5348-25-0x0000000000500000-0x0000000000510000-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/0x000b00000001e597-13.dat	UPX
behavioral2/memory/4168-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5348-25-0x0000000000500000-0x0000000000510000-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-1-5-21-1712835645-2080934712-2142796781-1000\Control Panel\International\Geo\Nation	2024-02-23_4e1c88a16a135fbfc29a99f401149ffc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5348	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 5348	4168	2024-02-23_4e1c88a16a135fbfc29a99f401149ffc_cryptolocker.exe	86
PID 4168 wrote to memory of 5348	4168	2024-02-23_4e1c88a16a135fbfc29a99f401149ffc_cryptolocker.exe	86
PID 4168 wrote to memory of 5348	4168	2024-02-23_4e1c88a16a135fbfc29a99f401149ffc_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-23_4e1c88a16a135fbfc29a99f401149ffc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_4e1c88a16a135fbfc29a99f401149ffc_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:5348

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
47KB

MD5
adae7315aabfede52f885e5a2a01d3f8

SHA1
f75090710e8f498c4f979e6d0a97a086b554473e

SHA256
6e31a443576266b95f03404b9b9b613240b4f060fd659e17171046fa401bfdd0

SHA512
b62fb3d0329a925f84a4d3024c4ed3537097095ce23e9a24c4937e22e88527e85b010e675939473dc24285c5c8ddbb043e64fd3ec30a618117b568bd87420b31

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

Filesize
64KB

Download
memory/4168-1-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/4168-2-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/4168-3-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

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

Filesize
64KB

Download
memory/5348-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download