22f5a8d3ac1af8a890b759997e177691c3d12ef2cb620c5d1b9a1283e0aea905

General

Target

2024-04-11_73ff06536b3c94b412299d8fdd6ea337_cryptolocker.exe
Size

67KB
MD5

73ff06536b3c94b412299d8fdd6ea337
SHA1

73b4fe83ca258f0ead1be237572b1c4e2b594100
SHA256

22f5a8d3ac1af8a890b759997e177691c3d12ef2cb620c5d1b9a1283e0aea905
SHA512

7ff14ac5439f36df73257b096ad38b31313784c1d28cc86d6dabf8d8f75c4e833886efdf285e2e2dcaf98ef6b9a26366953aad91d258bfa88197280033ac6bd0
SSDEEP

768:quVbxjgQNQXtckstOOtEvwDpjAaDOK6PsED3VK2+ZtyOjgO4r9vFAg2rq6W1A1P6:quJu9cvMOtEvwDpjWYTjipvF2bx1PQA6

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1008-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x00080000000120dc-11.dat	CryptoLocker_rule2
behavioral1/memory/1008-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2976-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2976-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1008-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x00080000000120dc-11.dat	CryptoLocker_set1
behavioral1/memory/1008-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2976-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2976-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1008-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x00080000000120dc-11.dat	UPX
behavioral1/memory/1008-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2976-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2976-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2976	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1008	2024-04-11_73ff06536b3c94b412299d8fdd6ea337_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1008-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x00080000000120dc-11.dat	upx
behavioral1/memory/1008-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2976-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2976-27-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 1008 wrote to memory of 2976	1008	2024-04-11_73ff06536b3c94b412299d8fdd6ea337_cryptolocker.exe	28
PID 1008 wrote to memory of 2976	1008	2024-04-11_73ff06536b3c94b412299d8fdd6ea337_cryptolocker.exe	28
PID 1008 wrote to memory of 2976	1008	2024-04-11_73ff06536b3c94b412299d8fdd6ea337_cryptolocker.exe	28
PID 1008 wrote to memory of 2976	1008	2024-04-11_73ff06536b3c94b412299d8fdd6ea337_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-11_73ff06536b3c94b412299d8fdd6ea337_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-11_73ff06536b3c94b412299d8fdd6ea337_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1008
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2976

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
292ef5db02edaef9f19487dbf3629dbe

SHA1
d26de7ea181f64ad337e043b6581dfa4fbde20ad

SHA256
dfc2ac0a1d15ab07d639ba278c6366ba22d643ac6a6aee93328634602622a3fe

SHA512
bc600765b3f149fc1264fef520c8fcecb590c5a90a6a2c489751901e09682aabec8d6923e9558b7e2a7cdb7c05982aa16e6cafccb0f9d560607593b8e7e767a0

Download Submit
memory/1008-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1008-1-0x00000000004B0000-0x00000000004B6000-memory.dmp

Filesize
24KB

Download
memory/1008-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/1008-3-0x00000000004B0000-0x00000000004B6000-memory.dmp

Filesize
24KB

Download
memory/1008-16-0x00000000026C0000-0x00000000026CF000-memory.dmp

Filesize
60KB

Download
memory/1008-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1008-29-0x00000000026C0000-0x00000000026CF000-memory.dmp

Filesize
60KB

Download
memory/2976-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2976-19-0x0000000000200000-0x0000000000206000-memory.dmp

Filesize
24KB

Download
memory/2976-22-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2976-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

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