9e72aafeae5617c2dbe24c4fdf571c928bcf2e5f940b7ac26d7dd4d5189ad558

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
24-02-2024 06:04

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General

Target

2024-02-24_f95d4d754ef6ab082761424b917ad47c_cryptolocker.exe
Size

117KB
MD5

f95d4d754ef6ab082761424b917ad47c
SHA1

2180fb68c04e9df4cf90b6833a78e17b097f2bef
SHA256

9e72aafeae5617c2dbe24c4fdf571c928bcf2e5f940b7ac26d7dd4d5189ad558
SHA512

5611ac8a8966b88b11b770fe9d5643a604e476c2b0d1839d9b03a1fc2bf4a0e990f5df5b77d5489950c95625e259610062d02e6862668c40c07a5c17cc756fbe
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01Qam:z6a+CdOOtEvwDpjczw

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1156-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023256-13.dat	CryptoLocker_rule2
behavioral2/memory/1156-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3168-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3168-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1156-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023256-13.dat	CryptoLocker_set1
behavioral2/memory/1156-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3168-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3168-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1156-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023256-13.dat	UPX
behavioral2/memory/1156-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3168-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3168-27-0x0000000000500000-0x0000000000510000-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-1-5-21-910440534-423636034-2318342392-1000\Control Panel\International\Geo\Nation	2024-02-24_f95d4d754ef6ab082761424b917ad47c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3168	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1156-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023256-13.dat	upx
behavioral2/memory/1156-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3168-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3168-27-0x0000000000500000-0x0000000000510000-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 1156 wrote to memory of 3168	1156	2024-02-24_f95d4d754ef6ab082761424b917ad47c_cryptolocker.exe	86
PID 1156 wrote to memory of 3168	1156	2024-02-24_f95d4d754ef6ab082761424b917ad47c_cryptolocker.exe	86
PID 1156 wrote to memory of 3168	1156	2024-02-24_f95d4d754ef6ab082761424b917ad47c_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-24_f95d4d754ef6ab082761424b917ad47c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-24_f95d4d754ef6ab082761424b917ad47c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1156
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3168

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
118KB

MD5
fe02b7a5b81ab9aa0323d66b98e12294

SHA1
108c5858bece82249d8cae616a3cdb000162c715

SHA256
8e930506feefd94733b74dee1b89f5d4f0953aecaaca27b174f8bf661761ed53

SHA512
bbcd06f3101e85c74e5ca020816cfed44078b34f44b317637f82e7e2661abe48e412a96f35d4ec078caccc014e254e6a3be6b8dff61c826a04965d09915952fb

Download Submit
memory/1156-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1156-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/1156-2-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/1156-3-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/1156-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3168-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3168-20-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/3168-23-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3168-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download