1bd2f789c6a1b5fc7e0e922be56019cc3a87f71e2a27c6058d69c564c95f3fb5

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
07-09-2024 00:27

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General

Target

2024-09-07_139b0848900804bf7ab94895284cd9b6_cryptolocker.exe
Size

55KB
MD5

139b0848900804bf7ab94895284cd9b6
SHA1

f3eb55e1a9b5fbf475ae915ed24b3cbc3fc48a7b
SHA256

1bd2f789c6a1b5fc7e0e922be56019cc3a87f71e2a27c6058d69c564c95f3fb5
SHA512

eed97541dbdd311f516a5ab3ec570ba992eebf5680793a1b79cef1b3c97a2d6a8ae45f56f5a93ee41580620f4223c06dec06c196b09699748dcd09c0bc93d386
SSDEEP

768:bco/2n1TCraU6GD1P2wZEjbhxnbcuyD7U9kXDn62tH/1/LpPFP8xLD:b7/y28wZEjbnouy8G76iH/NLp63

Score

7^/10

discovery upx

Malware Config

Signatures

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation	2024-09-07_139b0848900804bf7ab94895284cd9b6_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1424	rewok.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4064-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x00090000000234a3-13.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	2024-09-07_139b0848900804bf7ab94895284cd9b6_cryptolocker.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rewok.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4064 wrote to memory of 1424	4064	2024-09-07_139b0848900804bf7ab94895284cd9b6_cryptolocker.exe	86
PID 4064 wrote to memory of 1424	4064	2024-09-07_139b0848900804bf7ab94895284cd9b6_cryptolocker.exe	86
PID 4064 wrote to memory of 1424	4064	2024-09-07_139b0848900804bf7ab94895284cd9b6_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-09-07_139b0848900804bf7ab94895284cd9b6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-07_139b0848900804bf7ab94895284cd9b6_cryptolocker.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4064
- 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
  PID:1424

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

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

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

Filesize
55KB

MD5
f3ca41ca7c274d51755dd295c5e182df

SHA1
8261c947943bf193c425160975c39bb66c492382

SHA256
454418668d1bc820888ff2cd973ca3310ca6c60e46b66d8a3590316ee958da00

SHA512
27dca7689558919444bf1d9578283275acb3a92eedf5a7b7a48691d702d9f58948146c5443ada5267f37624881b1ed16f8ef718fda3f1b187e3b991dd26f1e4c

Download Submit
memory/1424-20-0x0000000002560000-0x0000000002566000-memory.dmp

Filesize
24KB

Download
memory/4064-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/4064-1-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/4064-2-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/4064-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download