9d3f0ba32ea2c2aea2c4ded38fbeeafa533e4b5d833800138765f6b793d2bcce

Analysis

max time kernel
147s
max time network
150s
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 02:46

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General

Target

2024-05-22_ba0f9df005b2c5e9b7825a0499b212a6_cryptolocker.exe
Size

40KB
MD5

ba0f9df005b2c5e9b7825a0499b212a6
SHA1

667bac22dc37d7692970a5eaeb7f5c278219557d
SHA256

9d3f0ba32ea2c2aea2c4ded38fbeeafa533e4b5d833800138765f6b793d2bcce
SHA512

84dd0893bdf049fb23537cf524070978bc1e14480b3196f58b3eafe9b63ed3d94b62d71abe95a8c80c65ee3f3448cb1f686fa5c097e9ead2fb5483908cb2af6c
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan/M/:qDdFJy3QMOtEvwDpjjWMl7Tdn/S

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1384-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1384-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3584-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3584-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1384-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/1384-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3584-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3584-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1384-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1384-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3584-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3584-28-0x0000000000500000-0x0000000000510000-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_ba0f9df005b2c5e9b7825a0499b212a6_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_ba0f9df005b2c5e9b7825a0499b212a6_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3584 asih.exe

pid	process
3584	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1384-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1384-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3584-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3584-28-0x0000000000500000-0x0000000000510000-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_ba0f9df005b2c5e9b7825a0499b212a6_cryptolocker.exe

description	pid	process	target process
PID 1384 wrote to memory of 3584	1384	2024-05-22_ba0f9df005b2c5e9b7825a0499b212a6_cryptolocker.exe	asih.exe
PID 1384 wrote to memory of 3584	1384	2024-05-22_ba0f9df005b2c5e9b7825a0499b212a6_cryptolocker.exe	asih.exe
PID 1384 wrote to memory of 3584	1384	2024-05-22_ba0f9df005b2c5e9b7825a0499b212a6_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_ba0f9df005b2c5e9b7825a0499b212a6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_ba0f9df005b2c5e9b7825a0499b212a6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1384

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3584

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
40KB

MD5
5680412cbeef7841cdd1eb7704154855

SHA1
3032a264c53ac83dae1b020ebf267118224055af

SHA256
510bb81c907c268001c9efe533148044702c4129badd46d68bc277eba81c3388

SHA512
f8065becdd5512148f586ff2bb3c3434585496a6fecc3134320496e80dc305e3a488885d7ecd3e603a018a80227c45a9ed0ac9367432b865c2091350c04755b7

Download Submit
memory/1384-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1384-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1384-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1384-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1384-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3584-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3584-21-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3584-27-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3584-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download