9a1cc729c2af721f81888c0e92e83419701909b334b0a5c0c5605a97514de834

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 20:33

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General

Target

2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe
Size

60KB
MD5

545c5d1d7027747e8e54b6fbb54b39da
SHA1

6a498af401d5ee093d99a9a858b2bb3acea5b32d
SHA256

9a1cc729c2af721f81888c0e92e83419701909b334b0a5c0c5605a97514de834
SHA512

5fa3bb029ec38ad43e3f9b65d1d68a81ebae25f3ae4cebdbea41ad481117117403281fe7b96706cd2bd0615944a41d1e447cbfb6011550b456e0ddd27545fce6
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAP6pi:H6QFElP6n+gou9cvMOtEvwDpjCpVX4

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/624-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/624-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4880-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/624-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/624-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4880-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/624-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/624-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4880-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4880 asih.exe

pid	process
4880	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/624-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/624-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4880-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe

description	pid	process	target process
PID 624 wrote to memory of 4880	624	2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe	asih.exe
PID 624 wrote to memory of 4880	624	2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe	asih.exe
PID 624 wrote to memory of 4880	624	2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_545c5d1d7027747e8e54b6fbb54b39da_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:624

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4880

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
60KB

MD5
32fe8b92cfad7c1e4a286ba5634fc183

SHA1
031215325135f8028f6cfa8fe1935655f6e7cfb3

SHA256
2325399511f8da63c5c133b5d3a41fbade52dd76cf3191ddcf93267fa5b22c36

SHA512
2fbb2967360977c6eb2a1b4e0fa2feb1238fcc38250395c7916c522519336d93a49a25ce94eeb4a082add45f61a4c8e2eefdbfd5d10a76e14b4f2d26c3cb2008

Download Submit
memory/624-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/624-1-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/624-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/624-9-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/624-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4880-25-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4880-19-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4880-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download