99f6053f2b24c5a3de6d207d6fe6fc5086459a7a19d4ba24d4d177d63b16a686

General

Target

2024-05-23_687c814fb7772acd2e045799192a7f8c_cryptolocker.exe
Size

38KB
MD5

687c814fb7772acd2e045799192a7f8c
SHA1

f01284c6ace9893543e138e6af87fef7243a2ce9
SHA256

99f6053f2b24c5a3de6d207d6fe6fc5086459a7a19d4ba24d4d177d63b16a686
SHA512

704fad1225044070d930c37a64bdca2ea7d862562bd241dd78be10107da16d79688c738a824433efc80048807cce28351408b2cad90d171354c925fcfc255102
SSDEEP

768:qTVbxjgQNQXtckstOOtEvwDpjAaD3TUogs/VXpAPWRc:qTJu9cvMOtEvwDpjppVXzRc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2772-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2772-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2932-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2932-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2772-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2772-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2932-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2932-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2772-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2772-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2932-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2932-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2932 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_687c814fb7772acd2e045799192a7f8c_cryptolocker.exe

pid process

2772 2024-05-23_687c814fb7772acd2e045799192a7f8c_cryptolocker.exe

pid	process
2932	asih.exe

pid	process
2772	2024-05-23_687c814fb7772acd2e045799192a7f8c_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2772-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2772-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2932-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2932-27-0x0000000000500000-0x000000000050F000-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:

2024-05-23_687c814fb7772acd2e045799192a7f8c_cryptolocker.exe

description	pid	process	target process
PID 2772 wrote to memory of 2932	2772	2024-05-23_687c814fb7772acd2e045799192a7f8c_cryptolocker.exe	asih.exe
PID 2772 wrote to memory of 2932	2772	2024-05-23_687c814fb7772acd2e045799192a7f8c_cryptolocker.exe	asih.exe
PID 2772 wrote to memory of 2932	2772	2024-05-23_687c814fb7772acd2e045799192a7f8c_cryptolocker.exe	asih.exe
PID 2772 wrote to memory of 2932	2772	2024-05-23_687c814fb7772acd2e045799192a7f8c_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_687c814fb7772acd2e045799192a7f8c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_687c814fb7772acd2e045799192a7f8c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2772

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2932

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
38KB

MD5
819d086c0825a104ecaa0597c19df865

SHA1
c18a634fd36e4aa1e2f62933d2abf2515fea47f4

SHA256
2ef82a936106a3ae444d988d98908e2db43c9419034dc5a7b1d076f8111cd132

SHA512
e9f5d674efb5e919444f18981e049a98ddf8991f3406b62787f466126775fdce78d2e7924bf0fbfd14128f4e70ea84d06478a67e60b902fe43269e14466039af

Download Submit
memory/2772-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2772-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2772-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2772-2-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2772-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2932-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2932-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2932-26-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2932-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads