44caliber | d5c05da57fa20048e35e6ef498b3dd0bcb92eaea3997e8a7009b38b8a15c4e86

Analysis

max time kernel
117s
max time network
140s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
12-10-2023 00:51

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General

Target

Yandex.bin.exe
Size

274KB
MD5

40e3881d6c0898f6a5c24940b54a69a2
SHA1

f3da392ee4fb703255eff7ee8a83f23c2bb02987
SHA256

d5c05da57fa20048e35e6ef498b3dd0bcb92eaea3997e8a7009b38b8a15c4e86
SHA512

9013a696cda9be776f0a5ee66aece8716662121e69c5be056c8567eabed8fea91641e50714962438efb57da1b1ff1d4a2c3211e65be10a9e7833e647f700eb8b
SSDEEP

6144:ef+BLtABPDMtBBfn1Y0gIoHOQZafTy8lI1D0Cbg:1tVvgIoHO+x1DRg

Score

10^/10

44caliber spyware stealer

Malware Config

Extracted

Family

44caliber

https://discord.com/api/webhooks/1155120137612034188/cdy5wHbWmzOOyiX6nZbn5OlBuBidB8er7f1281hl7JRUP1iVFGnh9s57SwGqJtsdtgrx

Signatures

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

4 freegeoip.app
5 freegeoip.app

flow	ioc
4	freegeoip.app
5	freegeoip.app

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Yandex.bin.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	Yandex.bin.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Yandex.bin.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

Yandex.bin.exe

pid process

2548 Yandex.bin.exe
2548 Yandex.bin.exe
2548 Yandex.bin.exe
2548 Yandex.bin.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Yandex.bin.exe

description pid process

Token: SeDebugPrivilege 2548 Yandex.bin.exe

pid	process
2548	Yandex.bin.exe
2548	Yandex.bin.exe
2548	Yandex.bin.exe
2548	Yandex.bin.exe

description	pid	process
Token: SeDebugPrivilege	2548	Yandex.bin.exe

C:\Users\Admin\AppData\Local\Temp\Yandex.bin.exe
"C:\Users\Admin\AppData\Local\Temp\Yandex.bin.exe"
1⤵
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2548

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:\Users\Admin\AppData\Roaming\44\Process.txt

Filesize
406B

MD5
ac1296dcf002670be4529248c268372c

SHA1
b7cf5c7fd6ceb4611cfa8f877e5d223186480dea

SHA256
bec450413421d26d212ac15a6168280213a778f240216c59be7032244ed88c08

SHA512
ea6e7437a747295d7147f82b133df6c0b17b6172245ec0166ff373695b857a33b301c3f913691e68299ba181b5fd8d8ad74bc695cbc54f47ee84894271990f98

Download Submit
memory/2548-0-0x00000000002B0000-0x00000000002FA000-memory.dmp

Filesize
296KB

Download
memory/2548-1-0x000007FEF5140000-0x000007FEF5B2C000-memory.dmp

Filesize
9.9MB

Download
memory/2548-2-0x000000001B250000-0x000000001B2D0000-memory.dmp

Filesize
512KB

Download
memory/2548-53-0x000007FEF5140000-0x000007FEF5B2C000-memory.dmp

Filesize
9.9MB

Download