990d4845ba766f0efffa02cd8e5689cf1a1cce93301d8e03184da0ef83e59814

Analysis

max time kernel
141s
max time network
140s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
19/09/2024, 03:47

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General

Target

2024-09-19_fb887fbda71a51e18d11d63e09f9ff89_cryptolocker.exe
Size

37KB
MD5

fb887fbda71a51e18d11d63e09f9ff89
SHA1

5c3c44502e3b9676da508a20c15f7851163401db
SHA256

990d4845ba766f0efffa02cd8e5689cf1a1cce93301d8e03184da0ef83e59814
SHA512

9638741e95bda85be73d6fca0bfe434d90bf65be427493298b2a6e01f332f50059b8e96f75b59d22aedc5a0ac088a96f40d9a3adec92db23e8f741f370d53334
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkIT6q:qDdFJy3QMOtEvwDpjjWMl7T6q

Score

7^/10

discovery upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2188	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
800	2024-09-19_fb887fbda71a51e18d11d63e09f9ff89_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/800-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000700000001211b-11.dat	upx
behavioral1/memory/2188-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/800-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2188-27-0x0000000000500000-0x0000000000510000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	asih.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-09-19_fb887fbda71a51e18d11d63e09f9ff89_cryptolocker.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 800 wrote to memory of 2188	800	2024-09-19_fb887fbda71a51e18d11d63e09f9ff89_cryptolocker.exe	30
PID 800 wrote to memory of 2188	800	2024-09-19_fb887fbda71a51e18d11d63e09f9ff89_cryptolocker.exe	30
PID 800 wrote to memory of 2188	800	2024-09-19_fb887fbda71a51e18d11d63e09f9ff89_cryptolocker.exe	30
PID 800 wrote to memory of 2188	800	2024-09-19_fb887fbda71a51e18d11d63e09f9ff89_cryptolocker.exe	30

C:\Users\Admin\AppData\Local\Temp\2024-09-19_fb887fbda71a51e18d11d63e09f9ff89_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-19_fb887fbda71a51e18d11d63e09f9ff89_cryptolocker.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:800
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2188

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
37KB

MD5
e760dc169f425d055ef731a5604ce0c8

SHA1
c5fd120d4ae45b8e270233d1b8dee80728735bbf

SHA256
399f01b18c871fb76b92b1c6030286979e41c14b56e7156a53a97b69794a6dbe

SHA512
94f3a13b7eb6baa1416b0693bee419b640626b4f1eac319788542f28b0fde79be6535e601973827d62281df30c4fa89d6f9d1a6db630ef5625ccdddaf675096b

Download Submit
memory/800-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/800-1-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/800-9-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/800-2-0x00000000004B0000-0x00000000004B6000-memory.dmp

Filesize
24KB

Download
memory/800-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2188-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2188-26-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2188-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download