a38eb16c106eb7fe42337c3f883c41a1d0e152931f94ab2306ad93d1c3bb6ba0

General

Target

2024-02-25_ee21fde179d00d0e84e69b3b0fe89a7e_cryptolocker.exe
Size

104KB
MD5

ee21fde179d00d0e84e69b3b0fe89a7e
SHA1

4190039fbd1bc4d0877fce6ce51e3b1f16babff8
SHA256

a38eb16c106eb7fe42337c3f883c41a1d0e152931f94ab2306ad93d1c3bb6ba0
SHA512

a7d1ee87d892d8f74e7c9655cbc99070e4d7390dddbe428b9fddd1fe4bf6b2f0f577432261212068aef2f832df379576c3f471737487c1310a61905e3050e833
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6Gks9:1nK6a+qdOOtEvwDpj9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/1052-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012262-11.dat	CryptoLocker_rule2
behavioral1/memory/1052-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1052-14-0x0000000002480000-0x0000000002490000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2488-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2488-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/1052-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c000000012262-11.dat	CryptoLocker_set1
behavioral1/memory/1052-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/1052-14-0x0000000002480000-0x0000000002490000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2488-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2488-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1052-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000c000000012262-11.dat	UPX
behavioral1/memory/1052-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2488-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2488-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2488	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1052	2024-02-25_ee21fde179d00d0e84e69b3b0fe89a7e_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1052-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000c000000012262-11.dat	upx
behavioral1/memory/1052-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2488-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2488-27-0x0000000000500000-0x000000000050F311-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

description	pid	Process	procid_target
PID 1052 wrote to memory of 2488	1052	2024-02-25_ee21fde179d00d0e84e69b3b0fe89a7e_cryptolocker.exe	28
PID 1052 wrote to memory of 2488	1052	2024-02-25_ee21fde179d00d0e84e69b3b0fe89a7e_cryptolocker.exe	28
PID 1052 wrote to memory of 2488	1052	2024-02-25_ee21fde179d00d0e84e69b3b0fe89a7e_cryptolocker.exe	28
PID 1052 wrote to memory of 2488	1052	2024-02-25_ee21fde179d00d0e84e69b3b0fe89a7e_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-25_ee21fde179d00d0e84e69b3b0fe89a7e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-25_ee21fde179d00d0e84e69b3b0fe89a7e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1052
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2488

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
104KB

MD5
16f050c93e04351916df5cfb735deaf7

SHA1
6c52bba6bd43762f9287ff611f579aea7557c5d2

SHA256
148782b0e6a703332c6c74c717256f473e25f68a36cd6aa30daad848382d59c6

SHA512
5ff105fac5497ad2a115920ea5c2a3431f18b5034ab84cf098f843387c41a52d6850f294046f64599523836ff22875aad8bf9124f90abb155492413fdf69671a

Download Submit
memory/1052-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1052-1-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/1052-3-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/1052-2-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/1052-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1052-14-0x0000000002480000-0x0000000002490000-memory.dmp

Filesize
64KB

Download
memory/2488-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2488-19-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2488-20-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2488-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

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