44caliber | 14430e71914c83f8d1de8e66caa39d07ab782efb662245fb9eff6aa9fca7ce87

Analysis

max time kernel
43s
max time network
57s
platform
windows11-21h2_x64
resource
win11-20240730-en
resource tags

arch:x64arch:x86image:win11-20240730-enlocale:en-usos:windows11-21h2-x64system
submitted
02-08-2024 11:11

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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/4848-232-0x0000000002DD0000-0x0000000002DDE000-memory.dmp	disable_win_def

Detect Xworm Payload 4 IoCs

Processes:

resource	yara_rule
behavioral4/files/0x000400000002aaae-17.dat	family_xworm
behavioral4/memory/3408-27-0x00000000008D0000-0x0000000000912000-memory.dmp	family_xworm
behavioral4/files/0x000100000002aac0-42.dat	family_xworm
behavioral4/memory/4848-59-0x0000000000D10000-0x0000000000D26000-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
2632	powershell.exe
3208	powershell.exe
576	powershell.exe
2372	powershell.exe

Drops startup file 4 IoCs

Processes:

injectdll.exeloaderr.exe

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svhost.lnk	injectdll.exe
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

Executes dropped EXE 4 IoCs

Processes:

Loader.exeinjectdll.exeloaderr.exefixer.exe

pid	Process
1800	Loader.exe
3408	injectdll.exe
4848	loaderr.exe
2080	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

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-1-5-21-1974522869-4251526421-3305193628-1000\Software\Microsoft\Windows\CurrentVersion\Run\svhost = "C:\\Users\\Admin\\AppData\\Roaming\\svhost.exe"	injectdll.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1974522869-4251526421-3305193628-1000\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
2	freegeoip.app
4	ip-api.com

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

System Information Discovery
T1082

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
3348	schtasks.exe
1100	schtasks.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

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

pid	Process
2080	fixer.exe
2080	fixer.exe
2080	fixer.exe
2080	fixer.exe
2632	powershell.exe
2632	powershell.exe
3208	powershell.exe
3208	powershell.exe
576	powershell.exe
576	powershell.exe
2372	powershell.exe
2372	powershell.exe
3408	injectdll.exe
4848	loaderr.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

Processes:

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

description	pid	Process
Token: SeDebugPrivilege	3408	injectdll.exe
Token: SeDebugPrivilege	2080	fixer.exe
Token: SeDebugPrivilege	4848	loaderr.exe
Token: SeDebugPrivilege	2632	powershell.exe
Token: SeDebugPrivilege	3208	powershell.exe
Token: SeDebugPrivilege	576	powershell.exe
Token: SeDebugPrivilege	2372	powershell.exe
Token: SeDebugPrivilege	3408	injectdll.exe
Token: SeDebugPrivilege	4848	loaderr.exe
Token: SeShutdownPrivilege	4848	loaderr.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

injectdll.exeloaderr.exe

pid	Process
3408	injectdll.exe
4848	loaderr.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

Loader V2.exeLoader.exeloaderr.exeinjectdll.exe

description	pid	Process	procid_target
PID 2680 wrote to memory of 1800	2680	Loader V2.exe	78
PID 2680 wrote to memory of 1800	2680	Loader V2.exe	78
PID 2680 wrote to memory of 3408	2680	Loader V2.exe	79
PID 2680 wrote to memory of 3408	2680	Loader V2.exe	79
PID 1800 wrote to memory of 4848	1800	Loader.exe	80
PID 1800 wrote to memory of 4848	1800	Loader.exe	80
PID 1800 wrote to memory of 2080	1800	Loader.exe	81
PID 1800 wrote to memory of 2080	1800	Loader.exe	81
PID 4848 wrote to memory of 2632	4848	loaderr.exe	83
PID 4848 wrote to memory of 2632	4848	loaderr.exe	83
PID 4848 wrote to memory of 3208	4848	loaderr.exe	85
PID 4848 wrote to memory of 3208	4848	loaderr.exe	85
PID 4848 wrote to memory of 576	4848	loaderr.exe	87
PID 4848 wrote to memory of 576	4848	loaderr.exe	87
PID 4848 wrote to memory of 2372	4848	loaderr.exe	89
PID 4848 wrote to memory of 2372	4848	loaderr.exe	89
PID 3408 wrote to memory of 3348	3408	injectdll.exe	91
PID 3408 wrote to memory of 3348	3408	injectdll.exe	91
PID 4848 wrote to memory of 1100	4848	loaderr.exe	93
PID 4848 wrote to memory of 1100	4848	loaderr.exe	93

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:2680
- C:\Users\Admin\AppData\Roaming\Loader.exe
  "C:\Users\Admin\AppData\Roaming\Loader.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:1800
- - 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:4848
  - - 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:2632
  - - 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:3208
  - - 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:576
  - - 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:2372
  - - 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:1100
- - 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:2080
- 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:3408
- - 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:3348

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
112B

MD5
e8c4aee6383d31ac1cce0ebc231ebf01

SHA1
c8dc3b46ec43aab942774ebc4b889a653a9a835f

SHA256
6904d097e44a403026306b242810ae3144a8fd2c06a8c09dd89d12dc9af6a3ab

SHA512
a89c97f10e38cb8b23a1cd181e7676558c2e188f30e0496051306c9d49dee0a6b744c082fa0a584cd861c8c2eace07ca0e9881a991cddb8bd17c610a2133d1a0

Download Submit
C:\ProgramData\44\Process.txt

Filesize
422B

MD5
811c251ec0200b01e4f763f7f009e17e

SHA1
15a2a2c7bfda0e709382e502a21e40d9f704a92e

SHA256
d29692905409a77c684d9278d2f8ac2b28365c5895733dacd9b9a35ebd9ed449

SHA512
0993aec16e25f0773110972a5466812e8a028fbd0afb22113f3565ed0ebae5078507afd85dd12f9c30c76723e1900736603f8d13816590e26573d9a6918aa365

Download Submit
C:\ProgramData\44\Process.txt

Filesize
744B

MD5
774ee2c72e38a7cd9b3267e9fce484fa

SHA1
e6eed7e64a44dfa3981778f115a0f2d38f37e266

SHA256
587d092a6f0395689171262805052968da2cdf12b21bae7d86b124589e16ae09

SHA512
4013ed74ba36664dda85d0b5e802e8b4bf6d1354512fb078fc49bf572818c6d7b5f7aa469b971b6dc347020e6f3e19809eafc0a1c41ab0f789a8b2505a4731a2

Download Submit
C:\ProgramData\44\Process.txt

Filesize
1KB

MD5
b48a18a23c7b855738f1530d3b0eb351

SHA1
e1a8798af6445fa15d367961b5a5c507429df2be

SHA256
8299c4a65bcdfe420d760a48af41b3ec606f8948bf6d77eaba225b342a7e678a

SHA512
e4f1090a22aa79c881a88e7559965503e4f4ed0148cbc448ad5bf9dc161d81f3a86cf331c3f5aca5d6f242127abda9132e6ca4a35bf8082e5c9dcf2572377f64

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
d0a4a3b9a52b8fe3b019f6cd0ef3dad6

SHA1
fed70ce7834c3b97edbd078eccda1e5effa527cd

SHA256
21942e513f223fdad778348fbb20617dd29f986bccd87824c0ae7f15649f3f31

SHA512
1a66f837b4e7fb6346d0500aeacb44902fb8a239bce23416271263eba46fddae58a17075e188ae43eb516c841e02c87e32ebd73256c7cc2c0713d00c35f1761b

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

Filesize
944B

MD5
4093e5ab3812960039eba1a814c2ffb0

SHA1
b5e4a98a80be72fccd3cc910e93113d2febef298

SHA256
c0794e2b7036ce5612446a8b15e0c8387773bbc921f63cf8849f8a1f4ef3878c

SHA512
f3555b45aa1a1dd5214716dc81a05905c4ecd5a3e1276d35e08c65623ab1d14d469b3b576a5d9638264c1222d73889d2cc1ee43fb579d9ca3fcddd9f557cac7b

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

Filesize
944B

MD5
5a229813bb19961125dd054b7137e8a7

SHA1
467c80909ebdfac7d0d9da24528fcb23ac052548

SHA256
9681554aa5cc22dd2b54fe5089f6417341c2c32915a3feadc61fc864f0742177

SHA512
37a408318d49bbe01acb04e57e5222e3cec89cd063ea26e18f20095955a85324bdccd036cb6efd4705a158b327041e66d4724ba3c87d6f8fa4428a99a93d87cd

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4i4o3xzl.omb.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/1800-97-0x00007FFC4A1F0000-0x00007FFC4ACB2000-memory.dmp

Filesize
10.8MB

Download
memory/1800-26-0x00007FFC4A1F0000-0x00007FFC4ACB2000-memory.dmp

Filesize
10.8MB

Download
memory/1800-25-0x0000000000380000-0x0000000000B14000-memory.dmp

Filesize
7.6MB

Download
memory/2080-58-0x00000287CBCC0000-0x00000287CBD0A000-memory.dmp

Filesize
296KB

Download
memory/2632-189-0x0000017ACDFC0000-0x0000017ACDFE2000-memory.dmp

Filesize
136KB

Download
memory/2680-0-0x00007FFC4A1F3000-0x00007FFC4A1F5000-memory.dmp

Filesize
8KB

Download
memory/2680-1-0x0000000000D20000-0x0000000001538000-memory.dmp

Filesize
8.1MB

Download
memory/3408-29-0x00007FFC4A1F0000-0x00007FFC4ACB2000-memory.dmp

Filesize
10.8MB

Download
memory/3408-27-0x00000000008D0000-0x0000000000912000-memory.dmp

Filesize
264KB

Download
memory/3408-231-0x00007FFC4A1F0000-0x00007FFC4ACB2000-memory.dmp

Filesize
10.8MB

Download
memory/4848-59-0x0000000000D10000-0x0000000000D26000-memory.dmp

Filesize
88KB

Download
memory/4848-232-0x0000000002DD0000-0x0000000002DDE000-memory.dmp

Filesize
56KB

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads