44caliber | 14430e71914c83f8d1de8e66caa39d07ab782efb662245fb9eff6aa9fca7ce87

Analysis

max time kernel
113s
max time network
128s
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 11:10

Sharing

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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/1948-244-0x0000000002840000-0x000000000284E000-memory.dmp	disable_win_def

Detect Xworm Payload 4 IoCs

Processes:

resource	yara_rule
behavioral4/files/0x000300000002aad9-17.dat	family_xworm
behavioral4/memory/4508-25-0x00000000001A0000-0x00000000001E2000-memory.dmp	family_xworm
behavioral4/files/0x000100000002aade-33.dat	family_xworm
behavioral4/memory/1948-58-0x0000000000450000-0x0000000000466000-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
2220	powershell.exe
848	powershell.exe
3788	powershell.exe
3120	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 7 IoCs

Processes:

Loader.exeinjectdll.exeloaderr.exefixer.exesvhost.exesvchost.exesvhost.exe

pid	Process
3316	Loader.exe
4508	injectdll.exe
1948	loaderr.exe
4176	fixer.exe
4036	svhost.exe
1916	svchost.exe
3052	svhost.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:

loaderr.exeinjectdll.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2326217578-3761199233-1872589011-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Local\\svchost.exe"	loaderr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2326217578-3761199233-1872589011-1000\Software\Microsoft\Windows\CurrentVersion\Run\svhost = "C:\\Users\\Admin\\AppData\\Roaming\\svhost.exe"	injectdll.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
2	freegeoip.app
1	freegeoip.app
1	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
2444	schtasks.exe
4408	schtasks.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

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

pid	Process
4176	fixer.exe
4176	fixer.exe
4176	fixer.exe
4176	fixer.exe
848	powershell.exe
848	powershell.exe
3788	powershell.exe
3788	powershell.exe
4508	injectdll.exe
3120	powershell.exe
3120	powershell.exe
2220	powershell.exe
2220	powershell.exe
1948	loaderr.exe

Suspicious use of AdjustPrivilegeToken 13 IoCs

Processes:

injectdll.exeloaderr.exefixer.exepowershell.exepowershell.exepowershell.exepowershell.exesvhost.exesvchost.exesvhost.exe

description	pid	Process
Token: SeDebugPrivilege	4508	injectdll.exe
Token: SeDebugPrivilege	1948	loaderr.exe
Token: SeDebugPrivilege	4176	fixer.exe
Token: SeDebugPrivilege	848	powershell.exe
Token: SeDebugPrivilege	3788	powershell.exe
Token: SeDebugPrivilege	4508	injectdll.exe
Token: SeDebugPrivilege	3120	powershell.exe
Token: SeDebugPrivilege	2220	powershell.exe
Token: SeDebugPrivilege	1948	loaderr.exe
Token: SeDebugPrivilege	4036	svhost.exe
Token: SeDebugPrivilege	1916	svchost.exe
Token: SeDebugPrivilege	3052	svhost.exe
Token: SeShutdownPrivilege	1948	loaderr.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

injectdll.exeloaderr.exe

pid	Process
4508	injectdll.exe
1948	loaderr.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

Loader V2.exeLoader.exeloaderr.exeinjectdll.exe

description	pid	Process	procid_target
PID 4548 wrote to memory of 3316	4548	Loader V2.exe	79
PID 4548 wrote to memory of 3316	4548	Loader V2.exe	79
PID 4548 wrote to memory of 4508	4548	Loader V2.exe	80
PID 4548 wrote to memory of 4508	4548	Loader V2.exe	80
PID 3316 wrote to memory of 1948	3316	Loader.exe	81
PID 3316 wrote to memory of 1948	3316	Loader.exe	81
PID 3316 wrote to memory of 4176	3316	Loader.exe	82
PID 3316 wrote to memory of 4176	3316	Loader.exe	82
PID 1948 wrote to memory of 848	1948	loaderr.exe	84
PID 1948 wrote to memory of 848	1948	loaderr.exe	84
PID 1948 wrote to memory of 3788	1948	loaderr.exe	86
PID 1948 wrote to memory of 3788	1948	loaderr.exe	86
PID 4508 wrote to memory of 2444	4508	injectdll.exe	88
PID 4508 wrote to memory of 2444	4508	injectdll.exe	88
PID 1948 wrote to memory of 3120	1948	loaderr.exe	90
PID 1948 wrote to memory of 3120	1948	loaderr.exe	90
PID 1948 wrote to memory of 2220	1948	loaderr.exe	92
PID 1948 wrote to memory of 2220	1948	loaderr.exe	92
PID 1948 wrote to memory of 4408	1948	loaderr.exe	94
PID 1948 wrote to memory of 4408	1948	loaderr.exe	94

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:4548
- C:\Users\Admin\AppData\Roaming\Loader.exe
  "C:\Users\Admin\AppData\Roaming\Loader.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:3316
- - 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:1948
  - - 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:848
  - - 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:3788
  - - 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:3120
  - - 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:2220
  - - 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:4408
- - 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:4176
- 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:4508
- - 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:2444

C:\Users\Admin\AppData\Roaming\svhost.exe
C:\Users\Admin\AppData\Roaming\svhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4036

C:\Users\Admin\AppData\Local\svchost.exe
C:\Users\Admin\AppData\Local\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1916

C:\Users\Admin\AppData\Roaming\svhost.exe
C:\Users\Admin\AppData\Roaming\svhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3052

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:\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\CLR_v4.0\UsageLogs\svhost.exe.log

Filesize
654B

MD5
2cbbb74b7da1f720b48ed31085cbd5b8

SHA1
79caa9a3ea8abe1b9c4326c3633da64a5f724964

SHA256
e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

SHA512
ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

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

Filesize
944B

MD5
2e8eb51096d6f6781456fef7df731d97

SHA1
ec2aaf851a618fb43c3d040a13a71997c25bda43

SHA256
96bfd9dd5883329927fe8c08b8956355a1a6ceb30ceeb5d4252b346df32bc864

SHA512
0a73dc9a49f92d9dd556c2ca2e36761890b3538f355ee1f013e7cf648d8c4d065f28046cd4a167db3dea304d1fbcbcea68d11ce6e12a3f20f8b6c018a60422d2

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

Filesize
944B

MD5
237ba1c70cf6faa8ffb68c1ae7cf6a3b

SHA1
41bb9746bd3cf1e5d2a2017817dd1ec694327016

SHA256
ba2aaf870217960d08933ab4605b220b1488db75d094e7fe1fbc592dd2e3c5ab

SHA512
cc8abe550552031713b9ed2e78734c562abde7d24a72f95e973e1aba7848e388b8edde0e59ba46037f5ad4fb4a0ba8d6dc8484606bdb20e7b162f1bbf5be7241

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

Filesize
944B

MD5
cedfb5c5943c2ab470a28f4187bc7750

SHA1
c634b313064d775057dc00f8101799772d546f31

SHA256
b323dd9ecd1d7e51d695ad1b2fd14fe83e24fc1ea6bd7ad0322cca931b8a4263

SHA512
e50eb221c77d51bec6b43c520612679bb877a8749f5986b172bce443f6a989118f5796e727ce8dc599918588bfb9ee04ac7028b30d1a33d7bcf8a96322941321

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ogrbju5f.u4a.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\44\Process.txt

Filesize
1KB

MD5
9e2818366d251498ee5a73507dad4b3e

SHA1
958ecc61254ca54f0aa61afe15752d565a0ca888

SHA256
20871799fa92e325e176b1ee000e855db5dba94e13c0b43666f0383bf65f5f55

SHA512
de59856f04317596196bb12a783f2376f4d2c8ff20efa8c14f1735cdceef02964f213ad78650339ac29e8dd8c6af77f8c27a3be97ce140d7a3259050b9e76ac3

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/848-183-0x000001C61FD90000-0x000001C61FDB2000-memory.dmp

Filesize
136KB

Download
memory/1948-58-0x0000000000450000-0x0000000000466000-memory.dmp

Filesize
88KB

Download
memory/1948-244-0x0000000002840000-0x000000000284E000-memory.dmp

Filesize
56KB

Download
memory/3316-180-0x00007FFA44120000-0x00007FFA44BE2000-memory.dmp

Filesize
10.8MB

Download
memory/3316-26-0x0000000000D00000-0x0000000001494000-memory.dmp

Filesize
7.6MB

Download
memory/3316-27-0x00007FFA44120000-0x00007FFA44BE2000-memory.dmp

Filesize
10.8MB

Download
memory/4176-59-0x00000195B30E0000-0x00000195B312A000-memory.dmp

Filesize
296KB

Download
memory/4508-29-0x00007FFA44120000-0x00007FFA44BE2000-memory.dmp

Filesize
10.8MB

Download
memory/4508-25-0x00000000001A0000-0x00000000001E2000-memory.dmp

Filesize
264KB

Download
memory/4508-236-0x00007FFA44120000-0x00007FFA44BE2000-memory.dmp

Filesize
10.8MB

Download
memory/4548-0-0x00007FFA44123000-0x00007FFA44125000-memory.dmp

Filesize
8KB

Download
memory/4548-1-0x0000000000940000-0x0000000001158000-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