44caliber | 14430e71914c83f8d1de8e66caa39d07ab782efb662245fb9eff6aa9fca7ce87

Analysis

max time kernel
42s
max time network
57s
platform
windows10-2004_x64
resource
win10v2004-20240730-en
resource tags

arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-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
behavioral3/memory/5096-244-0x00000000015A0000-0x00000000015AE000-memory.dmp	disable_win_def

Detect Xworm Payload 4 IoCs

Processes:

resource	yara_rule
behavioral3/files/0x00080000000234f1-17.dat	family_xworm
behavioral3/memory/1180-26-0x0000000000810000-0x0000000000852000-memory.dmp	family_xworm
behavioral3/files/0x00070000000234f3-33.dat	family_xworm
behavioral3/memory/5096-59-0x0000000000CC0000-0x0000000000CD6000-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
1108	powershell.exe
1604	powershell.exe
3012	powershell.exe
4376	powershell.exe

Checks computer location settings 2 TTPs 4 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

injectdll.exeloaderr.exeLoader V2.exeLoader.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1266786182-1874524688-71015548-1000\Control Panel\International\Geo\Nation	injectdll.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1266786182-1874524688-71015548-1000\Control Panel\International\Geo\Nation	loaderr.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1266786182-1874524688-71015548-1000\Control Panel\International\Geo\Nation	Loader V2.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1266786182-1874524688-71015548-1000\Control Panel\International\Geo\Nation	Loader.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
2348	Loader.exe
1180	injectdll.exe
5096	loaderr.exe
3996	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-1-5-21-1266786182-1874524688-71015548-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svhost = "C:\\Users\\Admin\\AppData\\Roaming\\svhost.exe"	injectdll.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1266786182-1874524688-71015548-1000\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
20	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
4604	schtasks.exe
4072	schtasks.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

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

pid	Process
3996	fixer.exe
3996	fixer.exe
3996	fixer.exe
3996	fixer.exe
1180	injectdll.exe
1108	powershell.exe
1108	powershell.exe
1604	powershell.exe
1604	powershell.exe
3012	powershell.exe
3012	powershell.exe
4376	powershell.exe
4376	powershell.exe
5096	loaderr.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

Processes:

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

description	pid	Process
Token: SeDebugPrivilege	1180	injectdll.exe
Token: SeDebugPrivilege	3996	fixer.exe
Token: SeDebugPrivilege	5096	loaderr.exe
Token: SeDebugPrivilege	1180	injectdll.exe
Token: SeDebugPrivilege	1108	powershell.exe
Token: SeDebugPrivilege	1604	powershell.exe
Token: SeDebugPrivilege	3012	powershell.exe
Token: SeDebugPrivilege	4376	powershell.exe
Token: SeDebugPrivilege	5096	loaderr.exe
Token: SeShutdownPrivilege	5096	loaderr.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

injectdll.exeloaderr.exe

pid	Process
1180	injectdll.exe
5096	loaderr.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

Loader V2.exeLoader.exeinjectdll.exeloaderr.exe

description	pid	Process	procid_target
PID 4920 wrote to memory of 2348	4920	Loader V2.exe	85
PID 4920 wrote to memory of 2348	4920	Loader V2.exe	85
PID 4920 wrote to memory of 1180	4920	Loader V2.exe	86
PID 4920 wrote to memory of 1180	4920	Loader V2.exe	86
PID 2348 wrote to memory of 5096	2348	Loader.exe	87
PID 2348 wrote to memory of 5096	2348	Loader.exe	87
PID 2348 wrote to memory of 3996	2348	Loader.exe	88
PID 2348 wrote to memory of 3996	2348	Loader.exe	88
PID 1180 wrote to memory of 4604	1180	injectdll.exe	91
PID 1180 wrote to memory of 4604	1180	injectdll.exe	91
PID 5096 wrote to memory of 1108	5096	loaderr.exe	93
PID 5096 wrote to memory of 1108	5096	loaderr.exe	93
PID 5096 wrote to memory of 1604	5096	loaderr.exe	95
PID 5096 wrote to memory of 1604	5096	loaderr.exe	95
PID 5096 wrote to memory of 3012	5096	loaderr.exe	97
PID 5096 wrote to memory of 3012	5096	loaderr.exe	97
PID 5096 wrote to memory of 4376	5096	loaderr.exe	99
PID 5096 wrote to memory of 4376	5096	loaderr.exe	99
PID 5096 wrote to memory of 4072	5096	loaderr.exe	101
PID 5096 wrote to memory of 4072	5096	loaderr.exe	101

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⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4920
- C:\Users\Admin\AppData\Roaming\Loader.exe
  "C:\Users\Admin\AppData\Roaming\Loader.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:2348
- - C:\Users\Admin\AppData\Local\Temp\loaderr.exe
    "C:\Users\Admin\AppData\Local\Temp\loaderr.exe"
    3⤵
    - Checks computer location settings
    - 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:5096
  - - 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:1108
  - - 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:1604
  - - 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:3012
  - - 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:4376
  - - 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:4072
- - 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:3996
- C:\Users\Admin\AppData\Roaming\injectdll.exe
  "C:\Users\Admin\AppData\Roaming\injectdll.exe"
  2⤵
  - Checks computer location settings
  - 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:1180
- - 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:4604

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\44\Process.txt

Filesize
736B

MD5
f16ee3f0e89fca0c55ca436d93e96f48

SHA1
bb1073805811ad66e80f204abc66a1ce6e262cee

SHA256
fe20f86d7d7cb9f2da590efc175dc0e4394eedd6708f3ce7030f6a79cfcfd634

SHA512
dd343373152c92bb2b7faec364b49ebb27b23b7f5f8e71946f943a243ae9ebb77b7dfdc1140e03ad861bf00fa27496b0f8d9fc08e8d99295b220a2a3b822a6b9

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

Filesize
1KB

MD5
17bed50984d3c8a15d4e893ff0bb3a7d

SHA1
1c88672bd2bd1286c53a327d1e5ca06f53fd4802

SHA256
84c0fc1276c7ac65b315f51cad7ad7cf227c58b56c5dfe018e6d04f2f5bfea24

SHA512
aa9443fc8901296db093453c071a4af9712a8ba4457d981806e550903f7bba941b2f7dc646221f13170edbaf2a529cc3b4c2cdb0b1b667ba1a22b724f08cd8dd

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
eb1ad317bd25b55b2bbdce8a28a74a94

SHA1
98a3978be4d10d62e7411946474579ee5bdc5ea6

SHA256
9e94e7c9ac6134ee30e79498558aa1a5a1ac79a643666c3f8922eed215dd3a98

SHA512
d011f266c0240d84470c0f9577cd9e4927309bd19bb38570ca9704ed8e1d159f9bea982a59d3eefef72ce7a10bd81208b82e88ef57c7af587f7437a89769adc0

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

Filesize
944B

MD5
2d06ce10e4e5b9e174b5ebbdad300fad

SHA1
bcc1c231e22238cef02ae25331320060ada2f131

SHA256
87d1dd56f12a88907ba5aebca8d555443d6f77ed214497277cc8bcd31c669f2c

SHA512
38cfbeb59605854ae4fcfae8619a6b26bd916148acfb5636383672a3960b45ca41fed5c241f97465129e92eaf78c4c85dcf258f1ab501a2bf771287ce04f76a7

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_wpiwvql3.g0z.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/1108-197-0x000001F078B90000-0x000001F078BB2000-memory.dmp

Filesize
136KB

Download
memory/1180-29-0x00007FFED0150000-0x00007FFED0C11000-memory.dmp

Filesize
10.8MB

Download
memory/1180-26-0x0000000000810000-0x0000000000852000-memory.dmp

Filesize
264KB

Download
memory/1180-242-0x00007FFED0150000-0x00007FFED0C11000-memory.dmp

Filesize
10.8MB

Download
memory/1180-243-0x00007FFED0150000-0x00007FFED0C11000-memory.dmp

Filesize
10.8MB

Download
memory/1180-185-0x00007FFED0150000-0x00007FFED0C11000-memory.dmp

Filesize
10.8MB

Download
memory/2348-28-0x00007FFED0150000-0x00007FFED0C11000-memory.dmp

Filesize
10.8MB

Download
memory/2348-97-0x00007FFED0150000-0x00007FFED0C11000-memory.dmp

Filesize
10.8MB

Download
memory/2348-25-0x0000000000660000-0x0000000000DF4000-memory.dmp

Filesize
7.6MB

Download
memory/3996-58-0x00000275473D0000-0x000002754741A000-memory.dmp

Filesize
296KB

Download
memory/4920-0-0x00007FFED0153000-0x00007FFED0155000-memory.dmp

Filesize
8KB

Download
memory/4920-1-0x0000000000A90000-0x00000000012A8000-memory.dmp

Filesize
8.1MB

Download
memory/5096-59-0x0000000000CC0000-0x0000000000CD6000-memory.dmp

Filesize
88KB

Download
memory/5096-244-0x00000000015A0000-0x00000000015AE000-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