44caliber | 5ebe07c4566e84380ec14aabbe3789bed128ae01a9ab4bbf97a1cd4f53342da0

Analysis

max time kernel
141s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
20-06-2024 11:02

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General

Target

Downloads.exe
Size

338KB
MD5

d68e66f73f6673ff81ed50582b387a57
SHA1

5c5884ad09b0e4147bdc7f5d9b31e330ce04d0f4
SHA256

5ebe07c4566e84380ec14aabbe3789bed128ae01a9ab4bbf97a1cd4f53342da0
SHA512

2ce5a663653effdcc6b9dfb19036cc862fe574ee78e8a3e422bbcd8e3ceaea638040aaf7f42a41a7c4f8807eee590846b12276eb605da92e5717d8587cfdd9ff
SSDEEP

6144:Ka4InuJg58BkgqPoDH49n8Bb/cQ/0Pq2C2M4rWN99TclWQpeBOPiHlIPtaIBYJ3i:Kat0EAH49n8BLg5M2WNO8DlIlaRJ3wF

Score

10^/10

44caliber spyware stealer

Malware Config

Extracted

Family

44caliber

https://discord.com/api/webhooks/1253302699978526772/b5mqXVOEs47XQy9dHee2Po12VotJwgdPtLauhKlKoyBH-xF42vUZ2Glc0N58n1pvAEdH

Signatures

44Caliber
An open source infostealer written in C#.
stealer 44caliber

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Downloads.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	Downloads.exe

Executes dropped EXE 1 IoCs

Processes:

Insidious.exe

pid process

3220 Insidious.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

9 freegeoip.app
10 freegeoip.app

pid	process
3220	Insidious.exe

flow	ioc
9	freegeoip.app
10	freegeoip.app

Drops file in Program Files directory 6 IoCs

Processes:

Downloads.exe

description	ioc	process
File created	C:\Program Files (x86)\sigma\__tmp_rar_sfx_access_check_240655937	Downloads.exe
File created	C:\Program Files (x86)\sigma\oxy_installer.exe	Downloads.exe
File opened for modification	C:\Program Files (x86)\sigma\oxy_installer.exe	Downloads.exe
File created	C:\Program Files (x86)\sigma\Insidious.exe	Downloads.exe
File opened for modification	C:\Program Files (x86)\sigma\Insidious.exe	Downloads.exe
File opened for modification	C:\Program Files (x86)\sigma	Downloads.exe

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

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

Insidious.exe

pid process

3220 Insidious.exe
3220 Insidious.exe
3220 Insidious.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Insidious.exe

description pid process

Token: SeDebugPrivilege 3220 Insidious.exe

pid	process
3220	Insidious.exe
3220	Insidious.exe
3220	Insidious.exe

description	pid	process
Token: SeDebugPrivilege	3220	Insidious.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

Downloads.exe

description	pid	process	target process
PID 4416 wrote to memory of 3220	4416	Downloads.exe	Insidious.exe
PID 4416 wrote to memory of 3220	4416	Downloads.exe	Insidious.exe

C:\Users\Admin\AppData\Local\Temp\Downloads.exe
"C:\Users\Admin\AppData\Local\Temp\Downloads.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4416
- C:\Program Files (x86)\sigma\Insidious.exe
  "C:\Program Files (x86)\sigma\Insidious.exe" oxy_installer.exe
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3220

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=3752 --field-trial-handle=2248,i,10247514684337323751,15511974759131734137,262144 --variations-seed-version /prefetch:8
1⤵
PID:3484

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files (x86)\sigma\Insidious.exe

Filesize
303KB

MD5
eefb066dcbb1ae4273c3834f74881a25

SHA1
013657673cb6fbdc4a04db2a4d01332d9ec37363

SHA256
9a23c010ab4bdd266a109740796baecc5b4eb583c1fe8d94b53961a029ca7cc2

SHA512
8d5eab85b0a56351bfc56a4940c1097bc3abb93e003135cdacc3e4cbf5b6a464bb3f46750c1466f1ddcffd265f52abf74951eda632d7b31dbd0b7e38c0d99741

Download Submit
memory/3220-14-0x00007FF9D5CB3000-0x00007FF9D5CB5000-memory.dmp

Filesize
8KB

Download
memory/3220-15-0x0000014287B40000-0x0000014287B92000-memory.dmp

Filesize
328KB

Download
memory/3220-42-0x00007FF9D5CB0000-0x00007FF9D6771000-memory.dmp

Filesize
10.8MB

Download
memory/3220-43-0x00007FF9D5CB3000-0x00007FF9D5CB5000-memory.dmp

Filesize
8KB

Download
memory/3220-44-0x00007FF9D5CB0000-0x00007FF9D6771000-memory.dmp

Filesize
10.8MB

Download
memory/3220-45-0x00007FF9D5CB0000-0x00007FF9D6771000-memory.dmp

Filesize
10.8MB

Download