eca0062685bdbc6a95aa5e976b67a65b9759bf59b7d1ca83ffc3f0d8b920b361

Analysis

max time kernel
146s
max time network
155s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-09-2024 18:29

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General

Target

2024-09-06_c8bcc2742cbc8aae500e2c45abc9490c_cryptolocker.exe
Size

33KB
MD5

c8bcc2742cbc8aae500e2c45abc9490c
SHA1

0c80074f611f4f6333c07aabf987d368fdca2cbf
SHA256

eca0062685bdbc6a95aa5e976b67a65b9759bf59b7d1ca83ffc3f0d8b920b361
SHA512

4860968158496ab6c48a3e0c9cf5cbf86af7e306e9979e0eb3df86ff82481b3e6dd5c66fb4567a6bb2c710bd4a1d2dccedd203ec0292d1a2b28aded09a2ccc60
SSDEEP

768:bROjawZEjbhxnbcuyD7U9kXfn62tH/1/LpP+1:bRO2wZEjbnouy8Gv6iH/NLpw

Score

7^/10

discovery upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1680	rewok.exe

Loads dropped DLL 1 IoCs

pid	Process
1856	2024-09-06_c8bcc2742cbc8aae500e2c45abc9490c_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1856-0-0x0000000000400000-0x000000000040D000-memory.dmp	upx
behavioral1/files/0x000a000000012234-11.dat	upx
behavioral1/memory/1680-16-0x0000000000400000-0x000000000040D000-memory.dmp	upx
behavioral1/memory/1680-26-0x0000000000400000-0x000000000040D000-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	2024-09-06_c8bcc2742cbc8aae500e2c45abc9490c_cryptolocker.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rewok.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1856	2024-09-06_c8bcc2742cbc8aae500e2c45abc9490c_cryptolocker.exe
1680	rewok.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1856 wrote to memory of 1680	1856	2024-09-06_c8bcc2742cbc8aae500e2c45abc9490c_cryptolocker.exe	30
PID 1856 wrote to memory of 1680	1856	2024-09-06_c8bcc2742cbc8aae500e2c45abc9490c_cryptolocker.exe	30
PID 1856 wrote to memory of 1680	1856	2024-09-06_c8bcc2742cbc8aae500e2c45abc9490c_cryptolocker.exe	30
PID 1856 wrote to memory of 1680	1856	2024-09-06_c8bcc2742cbc8aae500e2c45abc9490c_cryptolocker.exe	30

C:\Users\Admin\AppData\Local\Temp\2024-09-06_c8bcc2742cbc8aae500e2c45abc9490c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-06_c8bcc2742cbc8aae500e2c45abc9490c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1856
- 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:1680

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\rewok.exe

Filesize
34KB

MD5
5734f35dc792a9d089e9f3e0b4fbf583

SHA1
c188413697113fa520d69b880920b444872f25a7

SHA256
2d181146caad955e93f5fc551c7dce97ff85912e038e264f4d784d0b6e00f62f

SHA512
efeed2593619780b773be829cf33d6458ca8656a44e26991d2c2987267b5624875f599d24cc5debd5b1a6b96e1d5356c3a8497ab460c1e897383490d2f9c6e15

Download Submit
memory/1680-16-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/1680-18-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/1680-26-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/1856-0-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/1856-1-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/1856-9-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/1856-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1856-14-0x0000000001EE0000-0x0000000001EED000-memory.dmp

Filesize
52KB

Download