090f2fb3df61f906fc3592eb7b26a01fbbf1ce9d99d84fb7102c3c6d1dc846af

Analysis

max time kernel
136s
max time network
125s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
11/05/2024, 05:23

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General

Target

2024-05-11_08926f99370fbaa312f72b3264600591_cryptolocker.exe
Size

56KB
MD5

08926f99370fbaa312f72b3264600591
SHA1

80613d31506a76a68e008ef77ffeffe83c50c382
SHA256

090f2fb3df61f906fc3592eb7b26a01fbbf1ce9d99d84fb7102c3c6d1dc846af
SHA512

19b0a804c8a54858431baa8a0dbe5735976d818bff44e164cde2a7b5138169e7913f98e8f2a48235db74814eacf8d77eb5842b9a21c8adb267fe4da07704fafd
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlugJp:bP9g/xtCS3Dxx0ep

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

resource	yara_rule
behavioral2/memory/2300-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002348c-13.dat	CryptoLocker_rule2

UPX dump on OEP (original entry point) 2 IoCs

resource	yara_rule
behavioral2/memory/2300-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x000800000002348c-13.dat	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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-11_08926f99370fbaa312f72b3264600591_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
4212	gewos.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2300-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x000800000002348c-13.dat	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 2300 wrote to memory of 4212	2300	2024-05-11_08926f99370fbaa312f72b3264600591_cryptolocker.exe	83
PID 2300 wrote to memory of 4212	2300	2024-05-11_08926f99370fbaa312f72b3264600591_cryptolocker.exe	83
PID 2300 wrote to memory of 4212	2300	2024-05-11_08926f99370fbaa312f72b3264600591_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-11_08926f99370fbaa312f72b3264600591_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-11_08926f99370fbaa312f72b3264600591_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2300
- 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:4212

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
50d22f32a22a41c462766b53547bd142

SHA1
b76a5829bf8d82a85f9f32042eee6e9002d9dab3

SHA256
2625baf6986568eee784203d4e29f407458aca7b062a39db46e39cfb6795529b

SHA512
df5f552597cc4297c7c980fc3ab5d3137980f8b8d3ceafe7c99da4cc6527608dd592d1d0d78f6714dc0c34fb8937002745bbc099af2e104440ece46c66989670

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

Filesize
185B

MD5
34deb086cc238e6cf46761b36e8225cc

SHA1
2b2414700fc2b9665b686dc849b447f72b6cee6e

SHA256
22a66c63dd5b46bbcc7efe9761845119ccf0f5b3d9b2c063361db4e82f58a8ff

SHA512
375212fd93aa17b0148391b1274bfcada887e070396b7bcf2267fdf48db365409027c7c5c023f85cc002c1cd24571f690589e9c557b7f3586b13075b4dce4b7a

Download Submit
memory/2300-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2300-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2300-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2300-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4212-26-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download