b0e08bca5aea3b25fc5ddd8c099079cefbd9c8e2019320b388e41cc07a0bd2ff

Analysis

max time kernel
146s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
15/03/2024, 09:43

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General

Target

2024-03-15_531589e44d397a891fe0b6d0199c48bb_cryptolocker.exe
Size

80KB
MD5

531589e44d397a891fe0b6d0199c48bb
SHA1

c5b2f3c61c536c9980ee0cef32eb22ebbf6e1c03
SHA256

b0e08bca5aea3b25fc5ddd8c099079cefbd9c8e2019320b388e41cc07a0bd2ff
SHA512

54dd34e52cc8fc987ab5ec8cb3b9bf7e74a80a50e6865e4f74aeff05bbb5fa4b530bba9208f87a2d7e523b5552e1873f3fc32464825a17623928bef758aced45
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT78:T6a+rdOOtEvwDpjNw

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/844-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002321b-13.dat	CryptoLocker_rule2
behavioral2/memory/844-17-0x0000000000500000-0x0000000000510000-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/844-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002321b-13.dat	CryptoLocker_set1
behavioral2/memory/844-17-0x0000000000500000-0x0000000000510000-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/844-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000002321b-13.dat	UPX
behavioral2/memory/844-17-0x0000000000500000-0x0000000000510000-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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	2024-03-15_531589e44d397a891fe0b6d0199c48bb_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/844-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000700000002321b-13.dat	upx
behavioral2/memory/844-17-0x0000000000500000-0x0000000000510000-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 844 wrote to memory of 4716	844	2024-03-15_531589e44d397a891fe0b6d0199c48bb_cryptolocker.exe	91
PID 844 wrote to memory of 4716	844	2024-03-15_531589e44d397a891fe0b6d0199c48bb_cryptolocker.exe	91
PID 844 wrote to memory of 4716	844	2024-03-15_531589e44d397a891fe0b6d0199c48bb_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-03-15_531589e44d397a891fe0b6d0199c48bb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-15_531589e44d397a891fe0b6d0199c48bb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:844
- 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
80KB

MD5
cd52fbda50f3ec2bbf86cd1820a9c3cd

SHA1
2fc3d8c650ed10aca426ada4e1fb8fc31518bebd

SHA256
964b665eb192e633415c2e7b83b0cf3c51a690ad0a377c9eead2ba2706db75cc

SHA512
5e613351c59066a4ffe17baecc6d72360c4c3fa9a016f912b4e57bfa27c50dd44d71888969a1525c383e276d3e86c8297c31e650815bfa3ee0cea8a36d2b9818

Download Submit
memory/844-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/844-1-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/844-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/844-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/844-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4716-21-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4716-19-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

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

Filesize
64KB

Download