44caliber | ab49f788d53435b9657f8f1e2dd58de104d52ffa9fb97898aed8f44e7354efbc

Analysis

max time kernel
133s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
12-03-2022 20:36

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General

Target

MentalRun.exe
Size

274KB
MD5

18430d2473925ac89be6519d60022979
SHA1

a48a0badf5ab80de630fc0afaa79fc69a5bc18bb
SHA256

ab49f788d53435b9657f8f1e2dd58de104d52ffa9fb97898aed8f44e7354efbc
SHA512

6390bcd592ea313535a474bba33d4523a1e773921337d47cbb020cbbe61c2f35ff386de2b12f2eb1035624748421febd41df210480dc10d63927608ebf333385

Score

10^/10

44caliber discordurls spyware stealer

Malware Config

Extracted

Family

44caliber

https://discord.com/api/webhooks/951565322840862730/4aE4j6x4YXP3eBMbzUkURTY1g4UU99pU7a5DSU5qjg8GlmmffMOrYrR7kIL2_UkoKXuM

Signatures

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

Detected executables Discord URL observed in first stage droppers 1 IoCs

DISCORD URLS.

discordurls

Processes:

resource	yara_rule
behavioral2/memory/1660-130-0x0000013EECDC0000-0x0000013EECE0A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_DiscordURL

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
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
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

14 freegeoip.app
16 freegeoip.app

flow	ioc
14	freegeoip.app
16	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:

MentalRun.exe

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

MentalRun.exe

pid process

1660 MentalRun.exe
1660 MentalRun.exe
1660 MentalRun.exe
1660 MentalRun.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

MentalRun.exe

description pid process

Token: SeDebugPrivilege 1660 MentalRun.exe

pid	process
1660	MentalRun.exe
1660	MentalRun.exe
1660	MentalRun.exe
1660	MentalRun.exe

description	pid	process
Token: SeDebugPrivilege	1660	MentalRun.exe

C:\Users\Admin\AppData\Local\Temp\MentalRun.exe
"C:\Users\Admin\AppData\Local\Temp\MentalRun.exe"
1⤵
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1660

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

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Downloads

memory/1660-130-0x0000013EECDC0000-0x0000013EECE0A000-memory.dmp

Filesize
296KB

Download
memory/1660-131-0x00007FFF38300000-0x00007FFF38DC1000-memory.dmp

Filesize
10.8MB

Download
memory/1660-132-0x0000013EF0A00000-0x0000013EF0A02000-memory.dmp

Filesize
8KB

Download