b8c8c4c5b99d9209652a43ebe4b8dd062c4ddb071cbdea39dc3fe9a4dc933b8f

General

Target

2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe
Size

39KB
MD5

3e7c55ddfe2918c0f715ff0a48f2f3bf
SHA1

6174b11dd1e16767fec4cb8244bd7d714ea71843
SHA256

b8c8c4c5b99d9209652a43ebe4b8dd062c4ddb071cbdea39dc3fe9a4dc933b8f
SHA512

1282c1914281ecb0a9516e46ce89c3da411bda72a55cc833eb70e1e8309e0ed1e2b7491b55c600777516f6c5d13e0e71f5ce72db875de5fb2bcfcfbaeb6cfc86
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYn:qDdFJy3QMOtEvwDpjjWMl7T+

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2236-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2236-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2676-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2676-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2236-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2236-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2676-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2676-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2236-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2236-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2676-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2676-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2676 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe

pid process

2236 2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe

pid	process
2676	asih.exe

pid	process
2236	2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2236-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2236-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2676-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2676-27-0x0000000000500000-0x0000000000510000-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_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe

description	pid	process	target process
PID 2236 wrote to memory of 2676	2236	2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe	asih.exe
PID 2236 wrote to memory of 2676	2236	2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe	asih.exe
PID 2236 wrote to memory of 2676	2236	2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe	asih.exe
PID 2236 wrote to memory of 2676	2236	2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_3e7c55ddfe2918c0f715ff0a48f2f3bf_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2236

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2676

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
40KB

MD5
4dc1ab367aa7ca716006dc426dde17d0

SHA1
2da31d8ede60210e07c9492a2456b562d043046f

SHA256
7e5bec920edc929df2625cbf0af3f19af4a0faff11f74de45ff9e4ca80ee8357

SHA512
af876bac669c9c6df73af19eb55f1ca0050a1eb41c28afa1457b886d3ffdf783b338e111641e3b2c918ae4406e2c8017652183703c551dacb79bc67b95ad2082

Download Submit
memory/2236-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2236-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2236-2-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/2236-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2236-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2676-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2676-19-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2676-26-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2676-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads