f5a3dbda2c060716ba602220fb5b12a99ef42d443d9877b6458936cdd27c7c59

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
09/10/2024, 09:29

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General

Target

2024-10-09_d6fe99b1391faae862c9a1a0586386eb_cryptolocker.exe
Size

55KB
MD5

d6fe99b1391faae862c9a1a0586386eb
SHA1

6688882b8eea59cb03be3c5e7f066bd47a7ac087
SHA256

f5a3dbda2c060716ba602220fb5b12a99ef42d443d9877b6458936cdd27c7c59
SHA512

d09736ce6f9a6e143eda2236f01678b3230af755bb1c2d80f096764764b7419b9bce94986f6ea726315027001cf77f760523c9439640f45c26599420f9b797a7
SSDEEP

768:bco/2n1TCraU6GD1P2wZEjbhxnbcuyD7U9kXDn62tH/1/LpPFPg:b7/y28wZEjbnouy8G76iH/NLpW

Score

7^/10

discovery upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2888	rewok.exe

Loads dropped DLL 1 IoCs

pid	Process
376	2024-10-09_d6fe99b1391faae862c9a1a0586386eb_cryptolocker.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/376-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000b00000001225e-11.dat	upx

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_d6fe99b1391faae862c9a1a0586386eb_cryptolocker.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rewok.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
376	2024-10-09_d6fe99b1391faae862c9a1a0586386eb_cryptolocker.exe
2888	rewok.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 376 wrote to memory of 2888	376	2024-10-09_d6fe99b1391faae862c9a1a0586386eb_cryptolocker.exe	30
PID 376 wrote to memory of 2888	376	2024-10-09_d6fe99b1391faae862c9a1a0586386eb_cryptolocker.exe	30
PID 376 wrote to memory of 2888	376	2024-10-09_d6fe99b1391faae862c9a1a0586386eb_cryptolocker.exe	30
PID 376 wrote to memory of 2888	376	2024-10-09_d6fe99b1391faae862c9a1a0586386eb_cryptolocker.exe	30

C:\Users\Admin\AppData\Local\Temp\2024-10-09_d6fe99b1391faae862c9a1a0586386eb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-10-09_d6fe99b1391faae862c9a1a0586386eb_cryptolocker.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:376
- 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:2888

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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
1ad94e3c22653d1615a7a4b36c38555c

SHA1
92f239183cbef7dba4ad4877278f4a4f58ac7d26

SHA256
a018f7ae3fe210717095d71797ba10518611716e8f1edb88a05a3b2840332a16

SHA512
7814b10612f7432ec2ce164acd39c830a858226590f32bee995cf51d7e7676543d2f84225b209711187f0d2e65d6084dc841de03772307bd58d805cd4121d4dd

Download Submit
memory/376-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/376-1-0x00000000003D0000-0x00000000003D6000-memory.dmp

Filesize
24KB

Download
memory/376-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/376-9-0x00000000003D0000-0x00000000003D6000-memory.dmp

Filesize
24KB

Download