b296ee98ab66956634dc3d0017808c6271ea4bf7ed6707a2086548e993d00453

Analysis

max time kernel
141s
max time network
142s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
25-01-2024 15:36

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General

Target

2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe
Size

84KB
MD5

635074331b22720dc167130b5d9689f8
SHA1

ee774be8d1a5c4b11107bc38e12d04c69753bd21
SHA256

b296ee98ab66956634dc3d0017808c6271ea4bf7ed6707a2086548e993d00453
SHA512

eee5f73fd785556be822a5d80c81649900320edccb4071ebe771c8719da721f3a91457930c6d25b11548d73055699018c8d07be79f01f0c1bc7a120a8c19d047
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIcFo:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgs

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1372-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1372-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2680-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2680-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1372-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/1372-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2680-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2680-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1372-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1372-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2680-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2680-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2680 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe

pid process

1372 2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe

pid	process
2680	asih.exe

pid	process
1372	2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1372-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/1372-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2680-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2680-26-0x0000000000500000-0x000000000050F000-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 4 IoCs

Processes:

2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe

description	pid	process	target process
PID 1372 wrote to memory of 2680	1372	2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe	asih.exe
PID 1372 wrote to memory of 2680	1372	2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe	asih.exe
PID 1372 wrote to memory of 2680	1372	2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe	asih.exe
PID 1372 wrote to memory of 2680	1372	2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_635074331b22720dc167130b5d9689f8_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1372

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2680

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
84KB

MD5
c22dad6ec39a65ba04f40f8562ffedd9

SHA1
c8b93fb78879e20412ba1de20935a8512fc39e9a

SHA256
cfe3d6aa61cebcf1c48a9240f4a9d967cd34f93992d4c2ba48830397d55c6177

SHA512
4696d417d808fbe41dd73d98bf9e3312681218bf68141e60cc3334c401b08cb0e1430e3d9e5e164eeb8875b65e4a15211154f56d80f085288e96a532daaeb1fc

Download Submit
memory/1372-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1372-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1372-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/1372-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1372-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2680-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2680-21-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2680-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download