46df551d25a35bd6bd0130de2a2a5118599c27d9929a1bb2af1fa6922c3e39b2

Analysis

max time kernel
149s
max time network
156s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23-05-2024 01:24

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General

Target

2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe
Size

39KB
MD5

371846901ba23edb3d5b1a5fa45afc4a
SHA1

34aa21f0366fd576c36a3d26fa8d688a7d6104a6
SHA256

46df551d25a35bd6bd0130de2a2a5118599c27d9929a1bb2af1fa6922c3e39b2
SHA512

a0e43f8ec57991499dadba0bbb9b93bdb7423276fa4849960a9c935e596c8bfc77be369456b49440faf043af2f927993036a1df7c3d7d2736919bd173069feeb
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/9B:qDdFJy3QMOtEvwDpjjWMl7Ti

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2612-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2612-13-0x00000000025C0000-0x00000000025D0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2612-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2520-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2612-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2612-13-0x00000000025C0000-0x00000000025D0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2612-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2520-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2612-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2612-13-0x00000000025C0000-0x00000000025D0000-memory.dmp	UPX
behavioral1/memory/2612-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2520-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2520 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe

pid process

2612 2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe

pid	process
2520	asih.exe

pid	process
2612	2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2612-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2612-13-0x00000000025C0000-0x00000000025D0000-memory.dmp	upx
behavioral1/memory/2612-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2520-26-0x0000000000500000-0x0000000000510000-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 4 IoCs

Processes:

2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe

description	pid	process	target process
PID 2612 wrote to memory of 2520	2612	2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe	asih.exe
PID 2612 wrote to memory of 2520	2612	2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe	asih.exe
PID 2612 wrote to memory of 2520	2612	2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe	asih.exe
PID 2612 wrote to memory of 2520	2612	2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_371846901ba23edb3d5b1a5fa45afc4a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2612

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2520

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

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
39KB

MD5
94b1d3e934bf7f3d24eff367166a5f0b

SHA1
317a1186cc91d41de431013e3fe2fc673265d3a2

SHA256
aa10e5b73d436aff0b11cf00a90d19b0119819b81faed4161d944690549f745a

SHA512
6338b60574534f3ee0c460c419354c60e53187849818f3ae52b3f4ceb88e77f9d108f2d271e18a5591dc9b3780634ea1b03436d89bb2430244ccd8f229d3fa34

Download Submit
memory/2520-19-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2520-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2612-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2612-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2612-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2612-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2612-13-0x00000000025C0000-0x00000000025D0000-memory.dmp

Filesize
64KB

Download
memory/2612-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download