dd32a8393e24c67342c2ecf3c539caa7924654ebe67bde08db4fb5ea1e082f1d

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
24-05-2024 04:13

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General

Target

dd32a8393e24c67342c2ecf3c539caa7924654ebe67bde08db4fb5ea1e082f1d.exe
Size

39KB
MD5

820ac1958f78f9b7d0f517548553da87
SHA1

3f67a90ad07818ff3c05befb21e0e7828bbdde57
SHA256

dd32a8393e24c67342c2ecf3c539caa7924654ebe67bde08db4fb5ea1e082f1d
SHA512

369cbec5abf5ac1bb9cd0d01b20c91af3cce307235f2ad9a0da663834a15b994405151d918f4f48c37edb2001f28c89f2b3d677e007358108bea46f183678b44
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/q:qDdFJy3QMOtEvwDpjjWMl7Tb

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2240-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4740-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2240-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4740-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2240-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4740-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2240-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4740-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2240-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4740-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2240-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4740-28-0x0000000000500000-0x0000000000510000-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:

dd32a8393e24c67342c2ecf3c539caa7924654ebe67bde08db4fb5ea1e082f1d.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	dd32a8393e24c67342c2ecf3c539caa7924654ebe67bde08db4fb5ea1e082f1d.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4740 asih.exe

pid	process
4740	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2240-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4740-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2240-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4740-28-0x0000000000500000-0x0000000000510000-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:

dd32a8393e24c67342c2ecf3c539caa7924654ebe67bde08db4fb5ea1e082f1d.exe

description	pid	process	target process
PID 2240 wrote to memory of 4740	2240	dd32a8393e24c67342c2ecf3c539caa7924654ebe67bde08db4fb5ea1e082f1d.exe	asih.exe
PID 2240 wrote to memory of 4740	2240	dd32a8393e24c67342c2ecf3c539caa7924654ebe67bde08db4fb5ea1e082f1d.exe	asih.exe
PID 2240 wrote to memory of 4740	2240	dd32a8393e24c67342c2ecf3c539caa7924654ebe67bde08db4fb5ea1e082f1d.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\dd32a8393e24c67342c2ecf3c539caa7924654ebe67bde08db4fb5ea1e082f1d.exe
"C:\Users\Admin\AppData\Local\Temp\dd32a8393e24c67342c2ecf3c539caa7924654ebe67bde08db4fb5ea1e082f1d.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2240

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4740

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
11b5d16c71b67f70a6dc734cbd5954c2

SHA1
3f5c6f377129474f82ef1541fe83cef37af5441b

SHA256
9f160a532d747e64fe1ca2e369f37125805608e91fc8d680e9f8a5c2b3ab2800

SHA512
e986870d2e47fb1fbdaac635cd1744276506037aaeb9b0cda0576c52061801c211b78c0e88d51593c82e269bfba63d0c12fae37b942eb4e1d88fee92fb5c3ce9

Download Submit
memory/2240-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2240-1-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/2240-2-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/2240-9-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/2240-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4740-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4740-21-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4740-22-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/4740-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download