b85c4af5ca96216a701c1562fac0d8215f1840bc29c1c8b742a07c9c6402ce93

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 00:56

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General

Target

2024-05-23_d96964648e89e0a9ab36ab7ca98ec377_cryptolocker.exe
Size

39KB
MD5

d96964648e89e0a9ab36ab7ca98ec377
SHA1

b1a932828d1081e5aba1c2a4ce478e8a7480f565
SHA256

b85c4af5ca96216a701c1562fac0d8215f1840bc29c1c8b742a07c9c6402ce93
SHA512

9bb5803454cf4a4ee927cebd8372d26a9849b46942af90c00a1d7d16546375eae35a6a51b8a5ef244edc07ab03afc66685ccc9f10b081d03af21f0201412901b
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYlQ:qDdFJy3QMOtEvwDpjjWMl7T6Q

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/372-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/372-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4844-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/372-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/372-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4844-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/372-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/372-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4844-26-0x0000000000500000-0x0000000000510000-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:

2024-05-23_d96964648e89e0a9ab36ab7ca98ec377_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-05-23_d96964648e89e0a9ab36ab7ca98ec377_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4844 asih.exe

pid	process
4844	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/372-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/372-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4844-26-0x0000000000500000-0x0000000000510000-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:

2024-05-23_d96964648e89e0a9ab36ab7ca98ec377_cryptolocker.exe

description	pid	process	target process
PID 372 wrote to memory of 4844	372	2024-05-23_d96964648e89e0a9ab36ab7ca98ec377_cryptolocker.exe	asih.exe
PID 372 wrote to memory of 4844	372	2024-05-23_d96964648e89e0a9ab36ab7ca98ec377_cryptolocker.exe	asih.exe
PID 372 wrote to memory of 4844	372	2024-05-23_d96964648e89e0a9ab36ab7ca98ec377_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_d96964648e89e0a9ab36ab7ca98ec377_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_d96964648e89e0a9ab36ab7ca98ec377_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:372

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4844

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
39KB

MD5
d1e48a7d5d79eecca6e1cc3c3ad7b627

SHA1
dbcfee354397b31c521b7e34e03a42b3512cbd2e

SHA256
bd8f9d776dabef1681b4112c930e35539bd31f95764cfbcd0c727a287432b0f4

SHA512
71dcbde1ab2ee09d558fdf6d711275bde261532a9c8992844c145b97824d40e18127a42357c975c5cfcbf93b51564c19a9002168fb25bacdd05cdc9c8d8e4a03

Download Submit
memory/372-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/372-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/372-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/372-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/372-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4844-19-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/4844-25-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/4844-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download