44caliber | b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac

General

Target

b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac.exe
Size

441KB
MD5

292539bb44b33a26b14d7765695159d3
SHA1

6a17fdbf8ef8351ffe2ff67b4159ca69ddd48f28
SHA256

b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac
SHA512

a86a7c3183235a8a5371cc51f1b82373e9e8060df9beccedadf3fb8efab96d9b486ae50b6a601ce07c727a2035f043a574d736f2811c2485441bb3083dfbb516

Score

10^/10

44caliber spyware stealer

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/941047365631086602/V3bLg4Oq1PpqS0I4y0Iau7A7FmfvU9HodJZUfZspA0qYOBb5-PV3byaM7skOT24w1CCR

Signatures

44Caliber
An open source infostealer written in C#.
stealer 44caliber
Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

Processes:

WerFault.exe

description pid process target process

PID 1956 created 4568 1956 WerFault.exe b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac.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
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

6 freegeoip.app
7 freegeoip.app
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1152 4568 WerFault.exe b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac.exe

description	pid	process	target process
PID 1956 created 4568	1956	WerFault.exe	b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac.exe

flow	ioc
6	freegeoip.app
7	freegeoip.app

pid	pid_target	process	target process
1152	4568	WerFault.exe	b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac.exe

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

WerFault.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WerFault.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

WerFault.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WerFault.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac.exeWerFault.exe

pid	process
4568	b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac.exe
4568	b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac.exe
4568	b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac.exe
1152	WerFault.exe
1152	WerFault.exe
4568	b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac.exe

description pid process

Token: SeDebugPrivilege 4568 b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac.exe

description	pid	process
Token: SeDebugPrivilege	4568	b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

WerFault.exe

description	pid	process	target process
PID 1956 wrote to memory of 4568	1956	WerFault.exe	b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac.exe
PID 1956 wrote to memory of 4568	1956	WerFault.exe	b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac.exe

C:\Users\Admin\AppData\Local\Temp\b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac.exe
"C:\Users\Admin\AppData\Local\Temp\b9f34d06a915b9a5d091acf7901dcf484e3894e73b72f621d2c484566dd818ac.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4568

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -u -p 4568 -s 1456
2⤵
- Program crash
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
PID:1152

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 412 -p 4568 -ip 4568
1⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
PID:1956

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/4568-130-0x00000000006B0000-0x0000000000724000-memory.dmp

Filesize
464KB

Download
memory/4568-131-0x00007FFD3AB93000-0x00007FFD3AB95000-memory.dmp

Filesize
8KB

Download
memory/4568-132-0x000000001C830000-0x000000001C832000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads