231cfdb7d0fd4d9483a9a651717dbf49e152629e19c496fb98fb2d5d693458ab

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
04/02/2024, 01:23

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General

Target

2024-02-04_1899e5a458d1084f97ebb823128a978e_cryptolocker.exe
Size

81KB
MD5

1899e5a458d1084f97ebb823128a978e
SHA1

e8acbb1dd90e27d96591d3259709909b99328deb
SHA256

231cfdb7d0fd4d9483a9a651717dbf49e152629e19c496fb98fb2d5d693458ab
SHA512

3e243da1c68189aae0938504504dd79499dd7dc1cf17031895242123e5ed04787d0fdac5e58ca115d9ce3bb933546d1d66926f3c7617852c2a45e2c1972b7bf7
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT7vN:T6a+rdOOtEvwDpjN5

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/5952-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023229-13.dat	CryptoLocker_rule2
behavioral2/memory/3596-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5952-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3596-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/5952-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023229-13.dat	CryptoLocker_set1
behavioral2/memory/3596-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5952-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3596-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/5952-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023229-13.dat	UPX
behavioral2/memory/3596-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5952-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3596-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-02-04_1899e5a458d1084f97ebb823128a978e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3596	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5952-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023229-13.dat	upx
behavioral2/memory/3596-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/5952-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3596-27-0x0000000000500000-0x0000000000510000-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 5952 wrote to memory of 3596	5952	2024-02-04_1899e5a458d1084f97ebb823128a978e_cryptolocker.exe	27
PID 5952 wrote to memory of 3596	5952	2024-02-04_1899e5a458d1084f97ebb823128a978e_cryptolocker.exe	27
PID 5952 wrote to memory of 3596	5952	2024-02-04_1899e5a458d1084f97ebb823128a978e_cryptolocker.exe	27

C:\Users\Admin\AppData\Local\Temp\2024-02-04_1899e5a458d1084f97ebb823128a978e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_1899e5a458d1084f97ebb823128a978e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5952
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3596

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
81KB

MD5
6cfe58d3fe9e6bc5a88cf67e19f4725f

SHA1
3c095d12acd214be4966a5d356279ca0d8e436de

SHA256
32950b753a553a1012d2dc9bd349688fb4bd85c571e2c417122a21fb450babc5

SHA512
cda4b515dc94535ef142bf42954aa169c5121f09458b499178913ee927685051a57f1954e19909dea073a6b8fc12b98129d6462a7e002f5f4cc47a11e0681a90

Download Submit
memory/3596-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3596-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3596-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3596-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5952-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5952-2-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/5952-1-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/5952-3-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/5952-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download