a9331d29d4c999d2b9bf314a41e39a05e21b91d813025cc55612f98fd877a0c6

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
10/05/2024, 04:29

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General

Target

2024-05-10_3bc6f0b30fb4159142ccf93af72fdac8_cryptolocker.exe
Size

51KB
MD5

3bc6f0b30fb4159142ccf93af72fdac8
SHA1

1cd2a236194a78b61f725f4811184a3149952997
SHA256

a9331d29d4c999d2b9bf314a41e39a05e21b91d813025cc55612f98fd877a0c6
SHA512

1d4b9fb8c0ec5a287e5d270e28793bcefef3637dad68c937be9cee357e2cfcbada71764b26ee32db6a35bcd771d8cb32a403a515d3e4e22ee4cb17469ee8ec5a
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtO2:bODOw9acifAoc+vZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2204-1-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c00000001226d-11.dat	CryptoLocker_rule2
behavioral1/memory/2204-16-0x00000000021D0000-0x00000000021DF000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2204-15-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1344-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2204-1-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/files/0x000c00000001226d-11.dat	UPX
behavioral1/memory/2204-16-0x00000000021D0000-0x00000000021DF000-memory.dmp	UPX
behavioral1/memory/2204-15-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/1344-27-0x0000000008000000-0x000000000800F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1344	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
2204	2024-05-10_3bc6f0b30fb4159142ccf93af72fdac8_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2204-1-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/files/0x000c00000001226d-11.dat	upx
behavioral1/memory/2204-16-0x00000000021D0000-0x00000000021DF000-memory.dmp	upx
behavioral1/memory/2204-15-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/1344-27-0x0000000008000000-0x000000000800F000-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 2204 wrote to memory of 1344	2204	2024-05-10_3bc6f0b30fb4159142ccf93af72fdac8_cryptolocker.exe	28
PID 2204 wrote to memory of 1344	2204	2024-05-10_3bc6f0b30fb4159142ccf93af72fdac8_cryptolocker.exe	28
PID 2204 wrote to memory of 1344	2204	2024-05-10_3bc6f0b30fb4159142ccf93af72fdac8_cryptolocker.exe	28
PID 2204 wrote to memory of 1344	2204	2024-05-10_3bc6f0b30fb4159142ccf93af72fdac8_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-10_3bc6f0b30fb4159142ccf93af72fdac8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_3bc6f0b30fb4159142ccf93af72fdac8_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:1344

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\lossy.exe

Filesize
51KB

MD5
24398f5331a2b644d1fa26fbf1464b38

SHA1
493d790f77fc2a9540f4d378f0d920cb90185876

SHA256
67fe3bb5700440aae0bc6365ec36c46935c8f5b0d1ffd7056362d29cab10d7c7

SHA512
fa5ac28f5fc358a895eb29ace1d937d74494be58d3c091ca9946991795345d4e2a094f9009c5fd8e90c43a36de07224a663dfe7dfdbc46a0dc919ca069740590

Download Submit
memory/1344-18-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/1344-19-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/1344-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2204-1-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2204-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2204-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2204-2-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2204-16-0x00000000021D0000-0x00000000021DF000-memory.dmp

Filesize
60KB

Download
memory/2204-15-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2204-26-0x00000000021D0000-0x00000000021DF000-memory.dmp

Filesize
60KB

Download