1af66d8044ca8f6b81c161b4d9455e8942719a798b45a79c51b65f3fc5d2e803

Analysis

max time kernel
132s
max time network
139s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
30/03/2025, 15:54

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General

Target

2025-03-30_57077412495d3616e02ecee5e106698f_cryptolocker.exe
Size

53KB
MD5

57077412495d3616e02ecee5e106698f
SHA1

d9ce6e351bd8d92833f6263cf57fc3bbc6253f54
SHA256

1af66d8044ca8f6b81c161b4d9455e8942719a798b45a79c51b65f3fc5d2e803
SHA512

edaed4e5741286e6a657e45201df60886df21866e7e866e85007b1727c98f84810632cdb50d03660037f4fa25ddc40d86e32253e4f8b1f95f68048c109ff38a9
SSDEEP

768:bco/2n1TCraU6GD1P2wZEjbhxnbcuyD7U9kXDn62tH/1/LpP+DHo:b7/y28wZEjbnouy8G76iH/NLp6o

Score

7^/10

discovery upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2376	rewok.exe

Loads dropped DLL 1 IoCs

pid	Process
2280	2025-03-30_57077412495d3616e02ecee5e106698f_cryptolocker.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2280-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x0009000000012117-11.dat	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	2025-03-30_57077412495d3616e02ecee5e106698f_cryptolocker.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rewok.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2280	2025-03-30_57077412495d3616e02ecee5e106698f_cryptolocker.exe
2376	rewok.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 2376	2280	2025-03-30_57077412495d3616e02ecee5e106698f_cryptolocker.exe	30
PID 2280 wrote to memory of 2376	2280	2025-03-30_57077412495d3616e02ecee5e106698f_cryptolocker.exe	30
PID 2280 wrote to memory of 2376	2280	2025-03-30_57077412495d3616e02ecee5e106698f_cryptolocker.exe	30
PID 2280 wrote to memory of 2376	2280	2025-03-30_57077412495d3616e02ecee5e106698f_cryptolocker.exe	30

C:\Users\Admin\AppData\Local\Temp\2025-03-30_57077412495d3616e02ecee5e106698f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2025-03-30_57077412495d3616e02ecee5e106698f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2280
- 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:2376

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
53KB

MD5
cd4c9a238416dd34b9d705a8ad84f28c

SHA1
a3275dee8fe2316e0c4d141590baa995105206b8

SHA256
53fe51c5faf60a4bebcb95252b733738c9011d61608332c235c71bb14263a035

SHA512
a4ed981a3adf9999577ab3abb98b7939460d3015a0bdbdb565e25e198717d25b6469ad39345179d01a0c9c74ad84da0f430c4a714f47dc0e7dcdf7faa2c5c47f

Download Submit
memory/2280-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2280-1-0x00000000003D0000-0x00000000003D6000-memory.dmp

Filesize
24KB

Download
memory/2280-2-0x00000000003D0000-0x00000000003D6000-memory.dmp

Filesize
24KB

Download
memory/2280-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2280-16-0x0000000003420000-0x000000000342E000-memory.dmp

Filesize
56KB

Download
memory/2376-25-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download