685f11ac89c57438bf404b2a0534211f022570468f99dc04a30d7dfc14e6188c

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
09-05-2024 03:52

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-09_b3e77bbf45de73a20f9a80b577dc9b29_cryptolocker.exe
Size

55KB
MD5

b3e77bbf45de73a20f9a80b577dc9b29
SHA1

003618a3b502984b6f45bdf16b53bf4377259cba
SHA256

685f11ac89c57438bf404b2a0534211f022570468f99dc04a30d7dfc14e6188c
SHA512

5c36baae4aed26f30d3c28e23b92ab776998afa127e807156b5aa0257277eca372872d128942e8d8c1dd440104cea15c04f3c19b8fc16fae58debfa92b11e4bc
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjNac:bP9g/xtCS3Dxx0g

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2452-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d0000000144e9-11.dat	CryptoLocker_rule2
behavioral1/memory/2452-13-0x0000000001ED0000-0x0000000001EDE000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2508-17-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2452-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000d0000000144e9-11.dat	UPX
behavioral1/memory/2452-13-0x0000000001ED0000-0x0000000001EDE000-memory.dmp	UPX
behavioral1/memory/2508-17-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2508	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2452	2024-05-09_b3e77bbf45de73a20f9a80b577dc9b29_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2452-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000d0000000144e9-11.dat	upx
behavioral1/memory/2452-13-0x0000000001ED0000-0x0000000001EDE000-memory.dmp	upx
behavioral1/memory/2508-17-0x0000000000400000-0x000000000040E000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2452	2024-05-09_b3e77bbf45de73a20f9a80b577dc9b29_cryptolocker.exe
2508	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2452 wrote to memory of 2508	2452	2024-05-09_b3e77bbf45de73a20f9a80b577dc9b29_cryptolocker.exe	28
PID 2452 wrote to memory of 2508	2452	2024-05-09_b3e77bbf45de73a20f9a80b577dc9b29_cryptolocker.exe	28
PID 2452 wrote to memory of 2508	2452	2024-05-09_b3e77bbf45de73a20f9a80b577dc9b29_cryptolocker.exe	28
PID 2452 wrote to memory of 2508	2452	2024-05-09_b3e77bbf45de73a20f9a80b577dc9b29_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-09_b3e77bbf45de73a20f9a80b577dc9b29_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-09_b3e77bbf45de73a20f9a80b577dc9b29_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2452
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:2508

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Local\Temp\gewos.exe

Filesize
55KB

MD5
6834c1219c9eca4340b7b12f83e522cd

SHA1
1c13f91a297e4fa088f87e3fe3b003628960fac2

SHA256
f7ad4e809b94c76c39fb4d06a6fe3e9b146ebf789720974bafd820df89932c25

SHA512
0c976bd73c8780da5507bf55ac040bee55c5ff5312f48a189a052ddc2fe08368d219745cc56b233ee9f7b5b266b9fb2ecdae953e31778dcb86bb8f8aebafd008

Download Submit
memory/2452-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2452-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2452-1-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/2452-9-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/2452-13-0x0000000001ED0000-0x0000000001EDE000-memory.dmp

Filesize
56KB

Download
memory/2508-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2508-26-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download