a203e21b2db08901d1f1160bf1e83403dd663d7bb57d062af11dfc8e8d8d9bdd

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
09/10/2024, 06:24

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General

Target

2024-10-09_031151b5eb0ab2b131e65e330f32dd8b_cryptolocker.exe
Size

55KB
MD5

031151b5eb0ab2b131e65e330f32dd8b
SHA1

5d412cab916c50f9b4d02a5cc511726de3bd0e6e
SHA256

a203e21b2db08901d1f1160bf1e83403dd663d7bb57d062af11dfc8e8d8d9bdd
SHA512

3880822eef75e449822bf83751d21ca012e103615a4f2cdc2013f756396cf40c16730b3029d3028273ea0ff7f7320ab6dfa11b831a2d344607adc4234064081e
SSDEEP

768:bco/2n1TCraU6GD1P2wZEjbhxnbcuyD7U9kXDn62tH/1/LpPFP8j:b7/y28wZEjbnouy8G76iH/NLp2

Score

7^/10

discovery upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2684	rewok.exe

Loads dropped DLL 1 IoCs

pid	Process
2216	2024-10-09_031151b5eb0ab2b131e65e330f32dd8b_cryptolocker.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2216-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x00090000000122cf-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	2024-10-09_031151b5eb0ab2b131e65e330f32dd8b_cryptolocker.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rewok.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2216	2024-10-09_031151b5eb0ab2b131e65e330f32dd8b_cryptolocker.exe
2684	rewok.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2216 wrote to memory of 2684	2216	2024-10-09_031151b5eb0ab2b131e65e330f32dd8b_cryptolocker.exe	30
PID 2216 wrote to memory of 2684	2216	2024-10-09_031151b5eb0ab2b131e65e330f32dd8b_cryptolocker.exe	30
PID 2216 wrote to memory of 2684	2216	2024-10-09_031151b5eb0ab2b131e65e330f32dd8b_cryptolocker.exe	30
PID 2216 wrote to memory of 2684	2216	2024-10-09_031151b5eb0ab2b131e65e330f32dd8b_cryptolocker.exe	30

C:\Users\Admin\AppData\Local\Temp\2024-10-09_031151b5eb0ab2b131e65e330f32dd8b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-10-09_031151b5eb0ab2b131e65e330f32dd8b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2216
- 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:2684

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
55KB

MD5
51d1979b29f2effaa00185a8c1e2b905

SHA1
4b30ca2d82b143972ce9239d8a259b20ba983fd3

SHA256
c1b76913c106260c5abd8775c04821d921e4f48b10718e45bca6c4f3f7895061

SHA512
48be7c64fcea7d608a48dd8461956fe215b682f340087aacc3fed359e371c09f8b5108e143f086a3610f02b27a40b2b6be4347236c2f1fd6c1f6be9b4529294d

Download Submit
memory/2216-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2216-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2216-1-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2216-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2216-15-0x00000000004B0000-0x00000000004BE000-memory.dmp

Filesize
56KB

Download
memory/2684-25-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download