44caliber | 14430e71914c83f8d1de8e66caa39d07ab782efb662245fb9eff6aa9fca7ce87

Analysis

max time kernel
61s
max time network
80s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
03-08-2024 19:24

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Reason

Machine shutdown

Report Analysis Logs

General

Target

Loader V2.exe
Size

8.1MB
MD5

70a8a700260d1bf5d40214b4d16f2a4d
SHA1

888afda0f542f857c3627845abb17320c79348a3
SHA256

14430e71914c83f8d1de8e66caa39d07ab782efb662245fb9eff6aa9fca7ce87
SHA512

8d139e071d25106a30b3b00350fe08558bdaf884d039492611d90afd30c11ff08643560dc75ffaf7dafc0c53a96cf2b446239faf2fd8df9d0895d25b746d5d83
SSDEEP

196608:X7fP69w9dHnln76gtmUd74JVCbkQqeDDFloLRj/UVn5HIL6qG:Nvnln7RmUuJVuk0DDFWJCnVGs

Score

10^/10

44caliber xworm credential_access execution persistence rat spyware stealer trojan

Malware Config

Extracted

Family

xworm

147.185.221.20:13908

147.185.221.16:60401

Attributes

Install_directory
%AppData%
install_file
svhost.exe
telegram
https://api.telegram.org/bot7220907212:AAEOc5N7cpqGUVVvnWrzGHm8mdOrYN2e9mc/sendMessage?chat_id=6987872630

Extracted

Family

44caliber

https://discord.com/api/webhooks/1267250103538810911/_8BMipnmgDV4n-Uu_YmzeHrxrFFQPSAoBBDlwlDVhsDsk_31uQMADxZw-pq563wCO5KV

Signatures

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

Contains code to disable Windows Defender 1 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

Processes:

resource	yara_rule
behavioral4/memory/3516-236-0x000000001AFC0000-0x000000001AFCE000-memory.dmp	disable_win_def

Detect Xworm Payload 4 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\injectdll.exe	family_xworm
behavioral4/memory/3516-25-0x00000000002D0000-0x0000000000312000-memory.dmp	family_xworm
C:\Users\Admin\AppData\Local\Temp\loaderr.exe	family_xworm
behavioral4/memory/2496-58-0x0000000000440000-0x0000000000456000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003
Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
execution

PowerShell
T1059.001

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid process

640 powershell.exe
3440 powershell.exe
4084 powershell.exe
4388 powershell.exe

pid	process
640	powershell.exe
3440	powershell.exe
4084	powershell.exe
4388	powershell.exe

Drops startup file 4 IoCs

Processes:

injectdll.exeloaderr.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svhost.lnk	injectdll.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	loaderr.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	loaderr.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svhost.lnk	injectdll.exe

Executes dropped EXE 4 IoCs

Processes:

Loader.exeinjectdll.exeloaderr.exefixer.exe

pid process

4032 Loader.exe
3516 injectdll.exe
2496 loaderr.exe
3396 fixer.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
4032	Loader.exe
3516	injectdll.exe
2496	loaderr.exe
3396	fixer.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

injectdll.exeloaderr.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3761892313-3378554128-2287991803-1000\Software\Microsoft\Windows\CurrentVersion\Run\svhost = "C:\\Users\\Admin\\AppData\\Roaming\\svhost.exe"	injectdll.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3761892313-3378554128-2287991803-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Local\\svchost.exe"	loaderr.exe

Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

1 freegeoip.app
1 ip-api.com
2 freegeoip.app
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
1	freegeoip.app
1	ip-api.com
2	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:

fixer.exe

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

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exeschtasks.exe

pid process

4868 schtasks.exe
1604 schtasks.exe

pid	process
4868	schtasks.exe
1604	schtasks.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

fixer.exepowershell.exepowershell.exepowershell.exepowershell.exeinjectdll.exeloaderr.exe

pid	process
3396	fixer.exe
3396	fixer.exe
3396	fixer.exe
3396	fixer.exe
4084	powershell.exe
4084	powershell.exe
4388	powershell.exe
4388	powershell.exe
640	powershell.exe
640	powershell.exe
3440	powershell.exe
3440	powershell.exe
3516	injectdll.exe
2496	loaderr.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

Processes:

injectdll.exefixer.exeloaderr.exepowershell.exepowershell.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	3516	injectdll.exe
Token: SeDebugPrivilege	3396	fixer.exe
Token: SeDebugPrivilege	2496	loaderr.exe
Token: SeDebugPrivilege	4084	powershell.exe
Token: SeDebugPrivilege	4388	powershell.exe
Token: SeDebugPrivilege	640	powershell.exe
Token: SeDebugPrivilege	3440	powershell.exe
Token: SeDebugPrivilege	3516	injectdll.exe
Token: SeDebugPrivilege	2496	loaderr.exe
Token: SeShutdownPrivilege	3516	injectdll.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

injectdll.exeloaderr.exe

pid process

3516 injectdll.exe
2496 loaderr.exe

pid	process
3516	injectdll.exe
2496	loaderr.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

Loader V2.exeLoader.exeloaderr.exeinjectdll.exe

description	pid	process	target process
PID 4516 wrote to memory of 4032	4516	Loader V2.exe	Loader.exe
PID 4516 wrote to memory of 4032	4516	Loader V2.exe	Loader.exe
PID 4516 wrote to memory of 3516	4516	Loader V2.exe	injectdll.exe
PID 4516 wrote to memory of 3516	4516	Loader V2.exe	injectdll.exe
PID 4032 wrote to memory of 2496	4032	Loader.exe	loaderr.exe
PID 4032 wrote to memory of 2496	4032	Loader.exe	loaderr.exe
PID 4032 wrote to memory of 3396	4032	Loader.exe	fixer.exe
PID 4032 wrote to memory of 3396	4032	Loader.exe	fixer.exe
PID 2496 wrote to memory of 4084	2496	loaderr.exe	powershell.exe
PID 2496 wrote to memory of 4084	2496	loaderr.exe	powershell.exe
PID 2496 wrote to memory of 4388	2496	loaderr.exe	powershell.exe
PID 2496 wrote to memory of 4388	2496	loaderr.exe	powershell.exe
PID 2496 wrote to memory of 640	2496	loaderr.exe	powershell.exe
PID 2496 wrote to memory of 640	2496	loaderr.exe	powershell.exe
PID 3516 wrote to memory of 4868	3516	injectdll.exe	schtasks.exe
PID 3516 wrote to memory of 4868	3516	injectdll.exe	schtasks.exe
PID 2496 wrote to memory of 3440	2496	loaderr.exe	powershell.exe
PID 2496 wrote to memory of 3440	2496	loaderr.exe	powershell.exe
PID 2496 wrote to memory of 1604	2496	loaderr.exe	schtasks.exe
PID 2496 wrote to memory of 1604	2496	loaderr.exe	schtasks.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Loader V2.exe
"C:\Users\Admin\AppData\Local\Temp\Loader V2.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4516

C:\Users\Admin\AppData\Roaming\Loader.exe
"C:\Users\Admin\AppData\Roaming\Loader.exe"
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4032

C:\Users\Admin\AppData\Local\Temp\loaderr.exe
"C:\Users\Admin\AppData\Local\Temp\loaderr.exe"
3⤵
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2496

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\loaderr.exe'
4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4084

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'loaderr.exe'
4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4388

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\svchost.exe'
4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:640

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3440

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Local\svchost.exe"
4⤵
- Scheduled Task/Job: Scheduled Task
PID:1604

C:\Users\Admin\AppData\Local\Temp\fixer.exe
"C:\Users\Admin\AppData\Local\Temp\fixer.exe"
3⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3396

C:\Users\Admin\AppData\Roaming\injectdll.exe
"C:\Users\Admin\AppData\Roaming\injectdll.exe"
2⤵
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3516

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svhost" /tr "C:\Users\Admin\AppData\Roaming\svhost.exe"
3⤵
- Scheduled Task/Job: Scheduled Task
PID:4868

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

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:\ProgramData\44\Process.txt

Filesize
1KB

MD5
4ab44362ea5969cb4fae0503b4bd2b80

SHA1
5ecd8d4de25e89bfaa7499e28ff985af25a47fb4

SHA256
f3b353ce0b91a6be9f9dadf35c94361d95ec7985e41be7fa45e7ea5c4d6546f3

SHA512
b67208a3257bd2acaf3bfae2daba6269fed06eca117bf9999bd91dd50320a2436ab1223ff5b91e928ff3830318c00b3e9ecba2173225461579f84021951d86ba

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
9fe02a19db183cbe69c8d87c0f89d375

SHA1
2b4a654c0737c5b57b5ce554f2287425f3598f7c

SHA256
cb09b3f417a451a348671d01b81b91bb6142270e7d16934bda6598102c3107d9

SHA512
b334642b57fe8fb476c99c939b2a7d81e8fd091157f534b973e6f88cf21e71dd06bb510901debb8ec33388b3bd8f0be19471db3a2b75dc58d1f357ac1a024070

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
781da0576417bf414dc558e5a315e2be

SHA1
215451c1e370be595f1c389f587efeaa93108b4c

SHA256
41a5aef8b0bbeea2766f40a7bba2c78322379f167c610f7055ccb69e7db030fe

SHA512
24e283aa30a2903ebe154dad49b26067a45e46fec57549ad080d3b9ec3f272044efaaed3822d067837f5521262192f466c47195ffe7f75f8c7c5dcf3159ea737

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tf2dkxgv.gep.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\fixer.exe

Filesize
274KB

MD5
88505913c2c75f796c9a021aab2d356d

SHA1
5b5c06998d3e200c21c77ea4efaeaecdc7344e78

SHA256
62e414e990e80c8203955b0e32948ddc64903b80a462c339f1babfb03e641204

SHA512
6fa46be04c2693ea164fe52ddf3cca0bdafd1ab34d8c0f1c2bf3d361c6042f45375343f59e9474ded6718f8177a4f7eb19fddccd95f7fbb87aad12358b2d6905

Download Submit
C:\Users\Admin\AppData\Local\Temp\loaderr.exe

Filesize
65KB

MD5
95f8f28f5a8503461db6804cda9c4934

SHA1
81c0a30e498093d41948777135bbd407c7611cda

SHA256
aa40b9b929868482be1daae474d7c93426cd049f844c956865709ff8b7f240c2

SHA512
5c3460372a6640a98dd1b1d34a03b951ec4a8942e9065475e982a207881f290aedc3b51fe73c0da4c527e222addd1de2be7ba541e82287e43e16fc544ab34461

Download Submit
C:\Users\Admin\AppData\Roaming\Loader.exe

Filesize
7.6MB

MD5
aa16f3774491b600121545a5f194cefc

SHA1
c872fe765ecff1dada8378ad8a12cd5cf0425219

SHA256
c0a2b824a0fd05854818bfb81b02bc6178db3f8519807b15d844580099428e1d

SHA512
8b50e7c6eca25ecc2196fbfaf42079873e3c532a90e8d8b691fb594da3e067593f86f0d6488d0c314a27d78519f33fcbfb4532f811997891d55a47d582e1b3a8

Download Submit
C:\Users\Admin\AppData\Roaming\injectdll.exe

Filesize
244KB

MD5
74ffb0d60d647dd6ad8d00c1bee48011

SHA1
4c8a707a33b35b78f374c66d59f9c2314c20b25f

SHA256
b481f1e0cfe25e5f19da0a0333c78661bf5c75c0b1c616ff4aaaa07aed31efd1

SHA512
fc667f4560d6b19a9a4f37eb0e66c751eb348ffc0db69c7d0bd733dfd2df2dfdadc7b780cd93686350444cc14a54283bafe3afec611bcac3ad0239eda659f46c

Download Submit
memory/2496-58-0x0000000000440000-0x0000000000456000-memory.dmp

Filesize
88KB

Download
memory/3396-53-0x000001D602530000-0x000001D60257A000-memory.dmp

Filesize
296KB

Download
memory/3516-29-0x00007FFBDA830000-0x00007FFBDB2F2000-memory.dmp

Filesize
10.8MB

Download
memory/3516-25-0x00000000002D0000-0x0000000000312000-memory.dmp

Filesize
264KB

Download
memory/3516-233-0x00007FFBDA830000-0x00007FFBDB2F2000-memory.dmp

Filesize
10.8MB

Download
memory/3516-236-0x000000001AFC0000-0x000000001AFCE000-memory.dmp

Filesize
56KB

Download
memory/4032-97-0x00007FFBDA830000-0x00007FFBDB2F2000-memory.dmp

Filesize
10.8MB

Download
memory/4032-26-0x0000000000BD0000-0x0000000001364000-memory.dmp

Filesize
7.6MB

Download
memory/4032-27-0x00007FFBDA830000-0x00007FFBDB2F2000-memory.dmp

Filesize
10.8MB

Download
memory/4084-183-0x0000017BFBB30000-0x0000017BFBB52000-memory.dmp

Filesize
136KB

Download
memory/4516-0-0x00007FFBDA833000-0x00007FFBDA835000-memory.dmp

Filesize
8KB

Download
memory/4516-1-0x00000000009D0000-0x00000000011E8000-memory.dmp

Filesize
8.1MB

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads