238ed619242a0e9555acfcb59c9b60ce64675ea9a1a562b141700bbe8a6039b6

General

Target

2024-04-24_f2ee75777dcadfa5cf6e8746f97e7009_cryptolocker.exe
Size

67KB
MD5

f2ee75777dcadfa5cf6e8746f97e7009
SHA1

da655a3dbbeb7de72a0fdf0a41b3bc9a6050778d
SHA256

238ed619242a0e9555acfcb59c9b60ce64675ea9a1a562b141700bbe8a6039b6
SHA512

a2490f4fa27c79022f1fe9f6a8f5a5fea32cd08622bcc48ef39e0e8dc75a798edb4fea9fa6276fc8dc34baf1f5576f4764b2bd6d0e659951d814b76d564ad93a
SSDEEP

768:quVbxjgQNQXtckstOOtEvwDpjAaDOK6PsED3VK2+ZtyOjgO4r9vFAg2rq6W1A1Pa:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAa

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2908-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d000000012253-11.dat	CryptoLocker_rule2
behavioral1/memory/2908-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2480-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2480-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2908-28-0x00000000004E0000-0x00000000004EF000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2908-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d000000012253-11.dat	CryptoLocker_set1
behavioral1/memory/2908-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2480-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2480-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2908-28-0x00000000004E0000-0x00000000004EF000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2908-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000d000000012253-11.dat	UPX
behavioral1/memory/2908-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2480-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2480-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2480	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2908	2024-04-24_f2ee75777dcadfa5cf6e8746f97e7009_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2908-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000d000000012253-11.dat	upx
behavioral1/memory/2908-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2480-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2480-26-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 2908 wrote to memory of 2480	2908	2024-04-24_f2ee75777dcadfa5cf6e8746f97e7009_cryptolocker.exe	28
PID 2908 wrote to memory of 2480	2908	2024-04-24_f2ee75777dcadfa5cf6e8746f97e7009_cryptolocker.exe	28
PID 2908 wrote to memory of 2480	2908	2024-04-24_f2ee75777dcadfa5cf6e8746f97e7009_cryptolocker.exe	28
PID 2908 wrote to memory of 2480	2908	2024-04-24_f2ee75777dcadfa5cf6e8746f97e7009_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-24_f2ee75777dcadfa5cf6e8746f97e7009_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_f2ee75777dcadfa5cf6e8746f97e7009_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2908
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2480

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
67KB

MD5
8cc4ac9a43cf99011ca2b6e6489558a5

SHA1
e35b7235800e472021c242324fe30399ac24c016

SHA256
2c1f52387f3bb6f385891562868eba8d87a9a083d63f5082f61d5af1cb20aec9

SHA512
b16c0b1bc4571a63ce1e5d49845ecc0684242fad9354885427f4d8fa0c66fb3e90732f50bff25abd2594e018ee03de03fb0a9a7f595bfa035276d875c1c809ec

Download Submit
memory/2480-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2480-19-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2480-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2908-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2908-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2908-2-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2908-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2908-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2908-16-0x00000000004E0000-0x00000000004EF000-memory.dmp

Filesize
60KB

Download
memory/2908-28-0x00000000004E0000-0x00000000004EF000-memory.dmp

Filesize
60KB

Download

Analysis

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