62ebed8279905c5f1620f8185c93ab7ff204db11a2183d96eb9cf408b2177ad0

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
12-02-2024 18:23

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General

Target

2024-02-12_0c978cd8e9c00fdeffca5b0ba5050fe8_cryptolocker.exe
Size

80KB
MD5

0c978cd8e9c00fdeffca5b0ba5050fe8
SHA1

31f9495a6f4c3002b300ec0cfd515d02e35af76a
SHA256

62ebed8279905c5f1620f8185c93ab7ff204db11a2183d96eb9cf408b2177ad0
SHA512

75eeab4ec0b7f6a5a071c89dc4910dc3ce1ff0635ff34b50a1ab4ac4ecd2f26e7626bdd067bd0ed3c45e0b3a56c91356c17eb5870a2835690c9204ae5d0197da
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBd0X:T6a+rdOOtEvwDpjNtA

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4760-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4760-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1152-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1152-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4760-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4760-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1152-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1152-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4760-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4760-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1152-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1152-26-0x0000000000500000-0x0000000000510000-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:

2024-02-12_0c978cd8e9c00fdeffca5b0ba5050fe8_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-02-12_0c978cd8e9c00fdeffca5b0ba5050fe8_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1152 asih.exe

pid	process
1152	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4760-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4760-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1152-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1152-26-0x0000000000500000-0x0000000000510000-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:

2024-02-12_0c978cd8e9c00fdeffca5b0ba5050fe8_cryptolocker.exe

description	pid	process	target process
PID 4760 wrote to memory of 1152	4760	2024-02-12_0c978cd8e9c00fdeffca5b0ba5050fe8_cryptolocker.exe	asih.exe
PID 4760 wrote to memory of 1152	4760	2024-02-12_0c978cd8e9c00fdeffca5b0ba5050fe8_cryptolocker.exe	asih.exe
PID 4760 wrote to memory of 1152	4760	2024-02-12_0c978cd8e9c00fdeffca5b0ba5050fe8_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_0c978cd8e9c00fdeffca5b0ba5050fe8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_0c978cd8e9c00fdeffca5b0ba5050fe8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4760

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:1152

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
80KB

MD5
d2bbb064137b1b1bc3b266b638a8720c

SHA1
f5472adab8f79487f3b7c2eef1c49096ec584b81

SHA256
acbfee299624e4eefa88169d203f4f5f59b7f7b3d6884aa6c09340d5e0d77f5e

SHA512
06c9ca45df153f10ccaba87056f8329281a813753711400f51caa90911dda116b1a8666b5609ac38c4d64fe6535f92788952fc0c260c1ba9be6d55c952dadb4d

Download Submit
memory/1152-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1152-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4760-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4760-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4760-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4760-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4760-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download