40577317108cfb25de0d83f926fc64b36778e3a9255eb757372850d80a602247

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
02/06/2024, 01:25

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General

Target

2024-06-02_58c2ba431ac6f361b62846622daa430f_cryptolocker.exe
Size

89KB
MD5

58c2ba431ac6f361b62846622daa430f
SHA1

09d4a13a7d146b80d85dc7e50b12be355ef0928b
SHA256

40577317108cfb25de0d83f926fc64b36778e3a9255eb757372850d80a602247
SHA512

c781162b18d4692bf978389e4cd987345840abe190fdb6a00f94046b66f4a27997ce36c1148ee128ede6175307d3e140e42016c6be1a7371b425f3a1eddb3137
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgi9:AnBdOOtEvwDpj6zq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/848-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000e000000012122-11.dat	CryptoLocker_rule2
behavioral1/memory/848-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2248-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2248-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/848-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000e000000012122-11.dat	CryptoLocker_set1
behavioral1/memory/848-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2248-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2248-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/848-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000e000000012122-11.dat	UPX
behavioral1/memory/848-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2248-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2248-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2248	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
848	2024-06-02_58c2ba431ac6f361b62846622daa430f_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/848-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000e000000012122-11.dat	upx
behavioral1/memory/848-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2248-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2248-27-0x0000000000500000-0x000000000050F000-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 848 wrote to memory of 2248	848	2024-06-02_58c2ba431ac6f361b62846622daa430f_cryptolocker.exe	28
PID 848 wrote to memory of 2248	848	2024-06-02_58c2ba431ac6f361b62846622daa430f_cryptolocker.exe	28
PID 848 wrote to memory of 2248	848	2024-06-02_58c2ba431ac6f361b62846622daa430f_cryptolocker.exe	28
PID 848 wrote to memory of 2248	848	2024-06-02_58c2ba431ac6f361b62846622daa430f_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-02_58c2ba431ac6f361b62846622daa430f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-02_58c2ba431ac6f361b62846622daa430f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:848
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2248

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
89KB

MD5
509a54ff6f2ee52c22a081a24681daf6

SHA1
fa3fee7c861e05752513d87f42d260f2cabfb06b

SHA256
8aae62c29cc7eb79ee3a4a1119ee3725111a9de4aba558785a405935cc775238

SHA512
adb323934cab9da0696d77e812bb82a2b294984c1edd2b10c3495ff3cd2511cfa1153d0ccf341696dd1003632811bebfbad1c7a899a06299f5c760ce2af5797c

Download Submit
memory/848-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/848-1-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/848-2-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/848-9-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/848-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2248-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2248-26-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2248-19-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2248-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download