00a88796d29ddcac6f8bd319de2708d848015a15c5b7975efedbfe364225e620

Analysis

max time kernel
136s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
03/05/2024, 21:25

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General

Target

2024-05-03_d4f12278dc2dd7e340bf76c0704deb20_cryptolocker.exe
Size

56KB
MD5

d4f12278dc2dd7e340bf76c0704deb20
SHA1

b4993832ec047451de543d500472faa3732983e8
SHA256

00a88796d29ddcac6f8bd319de2708d848015a15c5b7975efedbfe364225e620
SHA512

9008996d65824b32c96cd9b3e8278c0b5f0d062d9ff964f65e85df6f102df1f3803aa2bcee14f3d2329d882fed441507759eeb706d43a8af58789c14be29b515
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjl+R:bP9g/xtCS3Dxx0JR

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/3288-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00170000000239f7-13.dat	CryptoLocker_rule2
behavioral2/memory/4944-19-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/3288-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x00170000000239f7-13.dat	UPX
behavioral2/memory/4944-19-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Checks computer location settings 2 TTPs 2 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-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	2024-05-03_d4f12278dc2dd7e340bf76c0704deb20_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
4944	gewos.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3288-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x00170000000239f7-13.dat	upx
behavioral2/memory/4944-19-0x0000000000400000-0x000000000040E000-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 WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3288 wrote to memory of 4944	3288	2024-05-03_d4f12278dc2dd7e340bf76c0704deb20_cryptolocker.exe	85
PID 3288 wrote to memory of 4944	3288	2024-05-03_d4f12278dc2dd7e340bf76c0704deb20_cryptolocker.exe	85
PID 3288 wrote to memory of 4944	3288	2024-05-03_d4f12278dc2dd7e340bf76c0704deb20_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-03_d4f12278dc2dd7e340bf76c0704deb20_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_d4f12278dc2dd7e340bf76c0704deb20_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3288
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:4944

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
56KB

MD5
89276edf94a9b21f73479bbc57ae9b21

SHA1
dd4642fb13d1f29ef19098f8222b21359bace134

SHA256
5e4d134348ba17f7149ceef6578e44329d698a160bc9545b1c8c3f13f33c4686

SHA512
9d49ff42399b3feaa42f27fa0f76aaa064ed5c4051eeb56d0c38b9f1d639e69e086daebf00fcc4735a9f18a5baeae833be044aea817f8ba41ca38edc51deecd1

Download Submit
C:\Users\Admin\AppData\Local\Temp\gewosik.exe

Filesize
185B

MD5
b1aec10352685006461676396470cdcf

SHA1
ada69373c26ef0533e3770985ff8da789b87b494

SHA256
3148e50faefcfe822d71fd3f20a682db457100ef57cc60c2113cc144c0309a26

SHA512
3c384ad6838870af44990ea63c614a050e33a4eab99c5f6ffedd179154427a83fd0936aecb55fd377ac4835c99f577f6ea2a2139dd62e20d4eeb13ce94dd8e83

Download Submit
memory/3288-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3288-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3288-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3288-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4944-19-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/4944-27-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download