b0bce6cc22f342e3162e2ba65d67061b3633e4123b76c1c6682efe65aefdffea

Analysis

max time kernel
141s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
15-04-2024 14:50

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General

Target

2024-04-15_8c5af3107c3113d7cf527cd6f88fd7be_cryptolocker.exe
Size

39KB
MD5

8c5af3107c3113d7cf527cd6f88fd7be
SHA1

4a6a25f000de244513ee558b684e6163d8f0a72c
SHA256

b0bce6cc22f342e3162e2ba65d67061b3633e4123b76c1c6682efe65aefdffea
SHA512

e0a107fdd7b83318125224c7c79ceb9d3f1c106fba2eb23d16ffbfbb743fc5d1e5b0124c1753948d0f6dec4e2deaf614876820a8cc36cef66fd86eb586077c10
SSDEEP

384:btBYQg/WIEhUCSNyepEjYnDOAlzVol6U/zzo+tkq4XDIwNiJXxXunKzH15U/Es:btB9g/WItCSsAGjX7e9N0hunKLYP

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023276-12.dat	CryptoLocker_rule2

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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	gewos.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-15_8c5af3107c3113d7cf527cd6f88fd7be_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4172	gewos.exe

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 2212 wrote to memory of 4172	2212	2024-04-15_8c5af3107c3113d7cf527cd6f88fd7be_cryptolocker.exe	91
PID 2212 wrote to memory of 4172	2212	2024-04-15_8c5af3107c3113d7cf527cd6f88fd7be_cryptolocker.exe	91
PID 2212 wrote to memory of 4172	2212	2024-04-15_8c5af3107c3113d7cf527cd6f88fd7be_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-15_8c5af3107c3113d7cf527cd6f88fd7be_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_8c5af3107c3113d7cf527cd6f88fd7be_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2212
- 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:4172

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4292 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:8
1⤵
PID:3144

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
39KB

MD5
cc0507fc8ad705158632ee2e27d89d75

SHA1
b55fec24f9d8c7f40a2b6f9d03123a8bdc47db9b

SHA256
6ffcdf7986a6623e779093805f67f6b89ec34adeed009a217fa5167409a00680

SHA512
0aa125072c17c9bf25904eb866be10de05cb067b88d0fd25dbe28dddad12b4a23758584b66d5ba23a561b7593edc609976bdcce7741503784a871efd2b3abdd3

Download Submit
memory/2212-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2212-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2212-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4172-17-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download