44caliber | 26ef72d7170fa0aa8ffab8695637d465040d1e51a8ba03a22855d7abfb902fbe

Analysis

max time kernel
142s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
02-02-2024 16:53

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General

Target

8a098265737317cd7bf7bbef762b81c1.exe
Size

2.2MB
MD5

8a098265737317cd7bf7bbef762b81c1
SHA1

e1c206f8914af7b22b4cc0af74966723faefd1bd
SHA256

26ef72d7170fa0aa8ffab8695637d465040d1e51a8ba03a22855d7abfb902fbe
SHA512

1a66997af3559b58db357e021ccce53a5de87fa47c5fba4c175f930792b0c8b2ec43a67823df7112e9b662935bbc81b0f367912ab5d729ec076d8742df7a9d69
SSDEEP

24576:kJKWsWCN4jTYnUg5cb4xBNJhzuVy5rlZvUvb9CxxPkkz8V5p80kd2pkP4ij/v7IT:kJ2W/oUr4DNzzXrT4kMVfzhGN7es/K

Score

10^/10

44caliber evasion spyware stealer trojan

Malware Config

Extracted

Family

44caliber

https://discord.com/api/webhooks/850985103400108043/qMVlcxRCEtOy4d0lLo-ckGGqIgWka8O5mwrGC7NwW7qRJs5beglorhRUk-uRy4jQ1Cbz

Signatures

44Caliber
An open source infostealer written in C#.
stealer 44caliber
Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

8a098265737317cd7bf7bbef762b81c1.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ 8a098265737317cd7bf7bbef762b81c1.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	8a098265737317cd7bf7bbef762b81c1.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

8a098265737317cd7bf7bbef762b81c1.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	8a098265737317cd7bf7bbef762b81c1.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	8a098265737317cd7bf7bbef762b81c1.exe

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:

8a098265737317cd7bf7bbef762b81c1.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation	8a098265737317cd7bf7bbef762b81c1.exe

Executes dropped EXE 2 IoCs

Processes:

Insidious.exeSpy IDChanger (2).exe

pid process

3976 Insidious.exe
2248 Spy IDChanger (2).exe
Identifies Wine through registry keys 2 TTPs 1 IoCs
Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

8a098265737317cd7bf7bbef762b81c1.exe

description ioc process

Key opened \REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Software\Wine 8a098265737317cd7bf7bbef762b81c1.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

pid	process
3976	Insidious.exe
2248	Spy IDChanger (2).exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Software\Wine	8a098265737317cd7bf7bbef762b81c1.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

8a098265737317cd7bf7bbef762b81c1.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	8a098265737317cd7bf7bbef762b81c1.exe

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

15 freegeoip.app
14 freegeoip.app
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

8a098265737317cd7bf7bbef762b81c1.exe

pid process

4796 8a098265737317cd7bf7bbef762b81c1.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
15	freegeoip.app
14	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:

Insidious.exe

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

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

8a098265737317cd7bf7bbef762b81c1.exeInsidious.exeSpy IDChanger (2).exe

pid	process
4796	8a098265737317cd7bf7bbef762b81c1.exe
4796	8a098265737317cd7bf7bbef762b81c1.exe
3976	Insidious.exe
3976	Insidious.exe
3976	Insidious.exe
2248	Spy IDChanger (2).exe
2248	Spy IDChanger (2).exe
3976	Insidious.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Insidious.exe

description pid process

Token: SeDebugPrivilege 3976 Insidious.exe

description	pid	process
Token: SeDebugPrivilege	3976	Insidious.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

8a098265737317cd7bf7bbef762b81c1.exe

description	pid	process	target process
PID 4796 wrote to memory of 3976	4796	8a098265737317cd7bf7bbef762b81c1.exe	Insidious.exe
PID 4796 wrote to memory of 3976	4796	8a098265737317cd7bf7bbef762b81c1.exe	Insidious.exe
PID 4796 wrote to memory of 2248	4796	8a098265737317cd7bf7bbef762b81c1.exe	Spy IDChanger (2).exe
PID 4796 wrote to memory of 2248	4796	8a098265737317cd7bf7bbef762b81c1.exe	Spy IDChanger (2).exe
PID 4796 wrote to memory of 2248	4796	8a098265737317cd7bf7bbef762b81c1.exe	Spy IDChanger (2).exe

C:\Users\Admin\AppData\Local\Temp\8a098265737317cd7bf7bbef762b81c1.exe
"C:\Users\Admin\AppData\Local\Temp\8a098265737317cd7bf7bbef762b81c1.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Identifies Wine through registry keys
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4796

C:\Users\Admin\AppData\Local\Temp\Insidious.exe
"C:\Users\Admin\AppData\Local\Temp\Insidious.exe"
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3976

C:\Users\Admin\AppData\Local\Temp\Spy IDChanger (2).exe
"C:\Users\Admin\AppData\Local\Temp\Spy IDChanger (2).exe"
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:2248

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\44\Process.txt
Filesize
1KB

MD5
99f52fffc142bbb47363b9d9b495616e

SHA1
7eca81f9ed08411f27162a1b712f917543221c8a

SHA256
ca0ada7cfd2f38e4bb538506e9da7ec885eebf715dd872ff8d65378a17d90949

SHA512
41446c4219e0ddf20a1b52248acc759edd85f37c3125064083ea7f79021cb8b878f2bb0427be6a3cb981fcddaf61b11e2246315421a191585b612ed4833e92ec

Download Submit
C:\Users\Admin\AppData\Local\Temp\Insidious.exe
Filesize
274KB

MD5
cc0f9ce3587d6a0ee7390ccf8567b764

SHA1
0d6b82a85b3ccf11a01482832fcb28e8f97ed68c

SHA256
7ce1e233b1994f4db7ded9540bc77f86608a8fed62ed9f58a36aedb9be3723b8

SHA512
b56fe5774b378c5dc6c73f9807e07062286b20077cf6a2ba4328d40ae597c0896dd97f955571893fad9e2e88eecd8fb7ffee84261caaee0171cd33e04452e160

Download Submit
C:\Users\Admin\AppData\Local\Temp\Spy IDChanger (2).exe
Filesize
60KB

MD5
f18cf2c76c5e8283a9d81640b198e01b

SHA1
29d2b98d71a263ee319cc65109e7325604d203d0

SHA256
b54d12aafa616be9524995f8df0527848776c08432556c178667e1429744e34d

SHA512
9543bd395281d41c7fafc470812bb920cbd70b918c864b3b245451a2b679ab621401c4857c8da000f952ae73e3c3f084aaaf74a15dc91966caf7680b84f1da04

Download Submit
memory/3976-56-0x00007FF993F20000-0x00007FF9949E1000-memory.dmp

Filesize
10.8MB

Download
memory/3976-22-0x0000000000DC0000-0x0000000000E0A000-memory.dmp

Filesize
296KB

Download
memory/3976-57-0x000000001BAC0000-0x000000001BAD0000-memory.dmp

Filesize
64KB

Download
memory/3976-149-0x00007FF993F20000-0x00007FF9949E1000-memory.dmp

Filesize
10.8MB

Download
memory/4796-5-0x0000000002B10000-0x0000000002B11000-memory.dmp

Filesize
4KB

Download
memory/4796-4-0x0000000002B00000-0x0000000002B01000-memory.dmp

Filesize
4KB

Download
memory/4796-3-0x0000000000400000-0x0000000000923000-memory.dmp

Filesize
5.1MB

Download
memory/4796-24-0x0000000000400000-0x0000000000923000-memory.dmp

Filesize
5.1MB

Download
memory/4796-0-0x0000000000400000-0x0000000000923000-memory.dmp

Filesize
5.1MB

Download
memory/4796-1-0x0000000077734000-0x0000000077736000-memory.dmp

Filesize
8KB

Download