b083e6cd42fe31322d574fb9934f54c3de3f797599376ea235a6f08c17d93edd

Analysis

max time kernel
132s
max time network
140s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21/11/2024, 06:57

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General

Target

2024-11-21_c6164ca9303d3e69003ef56754fffd22_cryptolocker.exe
Size

55KB
MD5

c6164ca9303d3e69003ef56754fffd22
SHA1

a782074f0dd264dbcefbc3ab14e1696210c34355
SHA256

b083e6cd42fe31322d574fb9934f54c3de3f797599376ea235a6f08c17d93edd
SHA512

a2dfb3fac468ca0e746deeb2df17685a9f7384980f62e283d1b93cafb3ae06b6241deaf884a84d7124f2427efd70f0818b917500e02d22da68d28423b0c5184c
SSDEEP

768:bco/2n1TCraU6GD1P2wZEjbhxnbcuyD7U9kXDn62tH/1/LpPFP+:b7/y28wZEjbnouy8G76iH/NLpo

Score

7^/10

discovery upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2524	rewok.exe

Loads dropped DLL 1 IoCs

pid	Process
2972	2024-11-21_c6164ca9303d3e69003ef56754fffd22_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2972-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x0008000000012102-11.dat	upx
behavioral1/memory/2524-16-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/memory/2524-26-0x0000000000400000-0x000000000040E000-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	2024-11-21_c6164ca9303d3e69003ef56754fffd22_cryptolocker.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rewok.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2972	2024-11-21_c6164ca9303d3e69003ef56754fffd22_cryptolocker.exe
2524	rewok.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2972 wrote to memory of 2524	2972	2024-11-21_c6164ca9303d3e69003ef56754fffd22_cryptolocker.exe	30
PID 2972 wrote to memory of 2524	2972	2024-11-21_c6164ca9303d3e69003ef56754fffd22_cryptolocker.exe	30
PID 2972 wrote to memory of 2524	2972	2024-11-21_c6164ca9303d3e69003ef56754fffd22_cryptolocker.exe	30
PID 2972 wrote to memory of 2524	2972	2024-11-21_c6164ca9303d3e69003ef56754fffd22_cryptolocker.exe	30

C:\Users\Admin\AppData\Local\Temp\2024-11-21_c6164ca9303d3e69003ef56754fffd22_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-11-21_c6164ca9303d3e69003ef56754fffd22_cryptolocker.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2972
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of UnmapMainImage
  PID:2524

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

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Downloads

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

Filesize
55KB

MD5
be947991ee7cf947e06f36a5769b00c3

SHA1
1ce08380380b309ebce59cc48649b12bdcdcdec6

SHA256
8f9e3077aa3189334d46ce94b560e989deea19b4e28e26b64ae12468ce909fa7

SHA512
84bd65cfcdac5c501404cf22bdff39d67848eafcd1c7f089d4c7a656661fbbcdad17a491b1473e58a88e6b07030b105580f77720275281c3e4964346a31e31db

Download Submit
memory/2524-16-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2524-18-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/2524-26-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2972-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2972-1-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2972-9-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2972-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download