341b9ea0ed83d3abc6e75692e692840ee81a50f71be00702d5fc5ac7dbf5a08e

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
20/04/2024, 03:46

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General

Target

2024-04-20_73bd04a1ab2bb6be6e5cc22334e0403e_cryptolocker.exe
Size

88KB
MD5

73bd04a1ab2bb6be6e5cc22334e0403e
SHA1

d04af3356470d691ec41deb98b3259da9e33aed8
SHA256

341b9ea0ed83d3abc6e75692e692840ee81a50f71be00702d5fc5ac7dbf5a08e
SHA512

682f272f152efc06fd6ffea832b077bd4bd49f42294012c0111b90bc3f9bb930893227dbaca2fb800c2ec987b77e37d88678c10368ad3c958ae2ca8178738ae2
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQA1:n6a+1SEOtEvwDpjYYvQd2P1

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3160-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e970-13.dat	CryptoLocker_rule2
behavioral2/memory/3160-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4716-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3160-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e970-13.dat	CryptoLocker_set1
behavioral2/memory/3160-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4716-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3160-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000001e970-13.dat	UPX
behavioral2/memory/3160-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4716-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation	2024-04-20_73bd04a1ab2bb6be6e5cc22334e0403e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4716	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3160-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000300000001e970-13.dat	upx
behavioral2/memory/3160-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4716-26-0x0000000000500000-0x0000000000510000-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 3160 wrote to memory of 4716	3160	2024-04-20_73bd04a1ab2bb6be6e5cc22334e0403e_cryptolocker.exe	86
PID 3160 wrote to memory of 4716	3160	2024-04-20_73bd04a1ab2bb6be6e5cc22334e0403e_cryptolocker.exe	86
PID 3160 wrote to memory of 4716	3160	2024-04-20_73bd04a1ab2bb6be6e5cc22334e0403e_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-20_73bd04a1ab2bb6be6e5cc22334e0403e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_73bd04a1ab2bb6be6e5cc22334e0403e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3160
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4716

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
88KB

MD5
5451d522c34066127c05db349ea06a64

SHA1
ecf44055a01433d167c47ceccde842904531c755

SHA256
98b71b29a39065ce194a053d9d0580f22d257f50cbd37e535717df92f492c6f9

SHA512
9f1948f08628684aa0e3941e4f829ebc9f4c8d98ab02b58af5208d77c592b4ee085a77a2d3ca63b4d248dd39b8954cee3cc79411f609b50cf5bd3c322c435a9b

Download Submit
memory/3160-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3160-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3160-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3160-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3160-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4716-19-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/4716-21-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/4716-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download