7de87b488d21c14cca14914472591060c92b79ca13da8528abcc68205e284946

Analysis

max time kernel
147s
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
10-05-2024 07:56

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General

Target

2024-05-10_fdb91a7e1678e81b5ef06438d90e4e8f_cryptolocker.exe
Size

38KB
MD5

fdb91a7e1678e81b5ef06438d90e4e8f
SHA1

e01047b7c08d4204cb83a4198344448c0e81bd33
SHA256

7de87b488d21c14cca14914472591060c92b79ca13da8528abcc68205e284946
SHA512

55a91867ebae7c049ade0db7f652ad04186002483c313ed69fe66959dbc8eff614fd240a30e42a8a55e13e9fdccd0c16580151532ab6b9022096166af64e584d
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan/U:qDdFJy3QMOtEvwDpjjWMl7Tdn/U

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3312-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b00000002340a-13.dat	CryptoLocker_rule2
behavioral2/memory/3312-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4144-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3312-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000b00000002340a-13.dat	CryptoLocker_set1
behavioral2/memory/3312-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4144-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3312-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000b00000002340a-13.dat	UPX
behavioral2/memory/3312-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4144-27-0x0000000000500000-0x0000000000510000-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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-05-10_fdb91a7e1678e81b5ef06438d90e4e8f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4144	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3312-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000b00000002340a-13.dat	upx
behavioral2/memory/3312-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4144-27-0x0000000000500000-0x0000000000510000-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 3312 wrote to memory of 4144	3312	2024-05-10_fdb91a7e1678e81b5ef06438d90e4e8f_cryptolocker.exe	83
PID 3312 wrote to memory of 4144	3312	2024-05-10_fdb91a7e1678e81b5ef06438d90e4e8f_cryptolocker.exe	83
PID 3312 wrote to memory of 4144	3312	2024-05-10_fdb91a7e1678e81b5ef06438d90e4e8f_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-10_fdb91a7e1678e81b5ef06438d90e4e8f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_fdb91a7e1678e81b5ef06438d90e4e8f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3312
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4144

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
39KB

MD5
3a12c971b84bfbfcd9a78da4968cca4b

SHA1
4807eca40ca1ff60caf5a21e226dc7895646a59c

SHA256
f97974f15c90e57dcb0ed2decba509bfa5f326a7819dc7d8810c939a3d8cb2c3

SHA512
75c6234c62f9208f77a3e2dc3931e05eb0f2be0e6b0624b621576bdadef25d7144d00b331bdfa2ddecb144a64c061d4c9ea4294fb38295a6a83e83776ad22f79

Download Submit
memory/3312-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3312-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3312-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3312-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3312-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4144-26-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4144-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4144-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download