83302b98de2e7dde08f20256341ddda960cf50008a76c91dca1f9e919b279e3b

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
06-10-2024 05:28

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General

Target

2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe
Size

34KB
MD5

758647073a3eecb3f7c3ba77785c71aa
SHA1

ce0482cce4760b27a75acb6848e0c81ec626a97b
SHA256

83302b98de2e7dde08f20256341ddda960cf50008a76c91dca1f9e919b279e3b
SHA512

62bc4ec61b2ddf9d7fd0c88de1134b902450fcfc2d6a59b16fa47d09d39889cf578a98c728a8254d970ddc5acbed4b72ab2ad2cee7e5ba3f2d6a55f5e4e436a4
SSDEEP

768:bROjawZEjbhxnbcuyD7U9kXfn62tH/1/LpP+e3:bRO2wZEjbnouy8Gv6iH/NLpB

Score

7^/10

discovery upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2884	rewok.exe

Loads dropped DLL 1 IoCs

pid	Process
2740	2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2740-0-0x0000000000400000-0x000000000040D000-memory.dmp	upx
behavioral1/files/0x000a000000012283-11.dat	upx
behavioral1/memory/2884-16-0x0000000000400000-0x000000000040D000-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	rewok.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2740	2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe
2884	rewok.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2740 wrote to memory of 2884	2740	2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe	31
PID 2740 wrote to memory of 2884	2740	2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe	31
PID 2740 wrote to memory of 2884	2740	2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe	31
PID 2740 wrote to memory of 2884	2740	2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe	31

C:\Users\Admin\AppData\Local\Temp\2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-10-06_758647073a3eecb3f7c3ba77785c71aa_cryptolocker.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2740
- 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:2884

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
f3827201ae7f5b92025627e080ed9d7c

SHA1
d21d632ce01120082e8fe48e207c8d62abe1bf38

SHA256
2b4f8f90e5ac2761de238485f08075b3ed9fd095732a8c572d8b99e13db4b52f

SHA512
d95b75e457a0821a9a23ca690256af7621ee016e0a3fdb8af64c665c203b2fef5e85bbf22d7ba09c7f3ae75bd1e689881478561a47d0dce6a97a04c45acc12ab

Download Submit
memory/2740-0-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/2740-1-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/2740-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2740-9-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/2740-13-0x00000000030A0000-0x00000000030AD000-memory.dmp

Filesize
52KB

Download
memory/2884-16-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/2884-25-0x0000000000350000-0x0000000000356000-memory.dmp

Filesize
24KB

Download