44caliber | b05617170e474f6689b3c8bbf653e48b3b335d9924140f891a44327fe10cec8b

Analysis

max time kernel
91s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-en-20220112
submitted
01/03/2022, 18:12

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General

Target
b05617170e474f6689b3c8bbf653e48b3b335d9924140f891a44327fe10cec8b.exe
Size 274KB
Sample220301-wtn4facfej
SHA256 b05617170e474f6689b3c8bbf653e48b3b335d9924140f891a44327fe10cec8b
MD5 1774b03fe04c0912378903346f6d807a
SHA1 33fbaeeb05bfe3e985af80a4f400dbc236fa51bd
SHA512 8a76d27bc58ccc481bbdaa726483bf84b8a5c3e6512b6259a26b64fffea697900edc1efe5405c9b6a6ac61fbcc8bc0653b506692dde7f1c1251692595bd4aec0
MD5 SHA1 SHA512

Score

10^/10

44caliber spyware stealer

Malware Config

Extracted

Family

44caliber

https://discord.com/api/webhooks/943405830781427732/bWrTiH0DBogSkJQzwQGoq_flifTRESk2r9Ezawioxg9zPGU0YKxSBP93A3sfQaAMshgX

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
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.

flow	ioc
23	freegeoip.app
22	freegeoip.app

Checks processor information in registry 2 TTPs 4 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	b05617170e474f6689b3c8bbf653e48b3b335d9924140f891a44327fe10cec8b.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	b05617170e474f6689b3c8bbf653e48b3b335d9924140f891a44327fe10cec8b.exe
Key opened	\Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0	MusNotifyIcon.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	MusNotifyIcon.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2664	b05617170e474f6689b3c8bbf653e48b3b335d9924140f891a44327fe10cec8b.exe
2664	b05617170e474f6689b3c8bbf653e48b3b335d9924140f891a44327fe10cec8b.exe
2664	b05617170e474f6689b3c8bbf653e48b3b335d9924140f891a44327fe10cec8b.exe
2664	b05617170e474f6689b3c8bbf653e48b3b335d9924140f891a44327fe10cec8b.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2664	b05617170e474f6689b3c8bbf653e48b3b335d9924140f891a44327fe10cec8b.exe

C:\Users\Admin\AppData\Local\Temp\b05617170e474f6689b3c8bbf653e48b3b335d9924140f891a44327fe10cec8b.exe
"C:\Users\Admin\AppData\Local\Temp\b05617170e474f6689b3c8bbf653e48b3b335d9924140f891a44327fe10cec8b.exe"
1⤵
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2664

C:\Windows\system32\MusNotifyIcon.exe
%systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 0
1⤵
- Checks processor information in registry
PID:1756

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2664-130-0x0000000000610000-0x000000000065A000-memory.dmp

Download

memory/2664-131-0x00007FFE06DE3000-0x00007FFE06DE5000-memory.dmp

Download

memory/2664-132-0x000000001C7E0000-0x000000001C7E2000-memory.dmp

Download