44caliber | 14430e71914c83f8d1de8e66caa39d07ab782efb662245fb9eff6aa9fca7ce87

Analysis

max time kernel
42s
max time network
55s
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.

resource	yara_rule
behavioral3/memory/2848-246-0x00000000017C0000-0x00000000017CE000-memory.dmp	disable_win_def

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral3/files/0x00080000000234a9-17.dat	family_xworm
behavioral3/memory/5088-27-0x00000000008D0000-0x0000000000912000-memory.dmp	family_xworm
behavioral3/files/0x00070000000234ae-47.dat	family_xworm
behavioral3/memory/2848-58-0x0000000000EE0000-0x0000000000EF6000-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

pid	Process
8	powershell.exe
3236	powershell.exe
4508	powershell.exe
4960	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3089151618-2647890268-2710988337-1000\Control Panel\International\Geo\Nation	Loader V2.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3089151618-2647890268-2710988337-1000\Control Panel\International\Geo\Nation	Loader.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3089151618-2647890268-2710988337-1000\Control Panel\International\Geo\Nation	loaderr.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3089151618-2647890268-2710988337-1000\Control Panel\International\Geo\Nation	injectdll.exe

Drops startup file 4 IoCs

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

pid	Process
5116	Loader.exe
5088	injectdll.exe
2848	loaderr.exe
4980	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

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3089151618-2647890268-2710988337-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svhost = "C:\\Users\\Admin\\AppData\\Roaming\\svhost.exe"	injectdll.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3089151618-2647890268-2710988337-1000\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.

flow	ioc
1	freegeoip.app
2	freegeoip.app
21	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

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

pid	Process
540	schtasks.exe
4400	schtasks.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
4980	fixer.exe
4980	fixer.exe
4980	fixer.exe
4980	fixer.exe
3236	powershell.exe
3236	powershell.exe
4508	powershell.exe
4508	powershell.exe
5088	injectdll.exe
4960	powershell.exe
4960	powershell.exe
8	powershell.exe
8	powershell.exe
2848	loaderr.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

description	pid	Process
Token: SeDebugPrivilege	5088	injectdll.exe
Token: SeDebugPrivilege	2848	loaderr.exe
Token: SeDebugPrivilege	4980	fixer.exe
Token: SeDebugPrivilege	3236	powershell.exe
Token: SeDebugPrivilege	4508	powershell.exe
Token: SeDebugPrivilege	5088	injectdll.exe
Token: SeDebugPrivilege	4960	powershell.exe
Token: SeDebugPrivilege	8	powershell.exe
Token: SeDebugPrivilege	2848	loaderr.exe
Token: SeShutdownPrivilege	2848	loaderr.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5088	injectdll.exe
2848	loaderr.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2688 wrote to memory of 5116	2688	Loader V2.exe	86
PID 2688 wrote to memory of 5116	2688	Loader V2.exe	86
PID 2688 wrote to memory of 5088	2688	Loader V2.exe	87
PID 2688 wrote to memory of 5088	2688	Loader V2.exe	87
PID 5116 wrote to memory of 2848	5116	Loader.exe	88
PID 5116 wrote to memory of 2848	5116	Loader.exe	88
PID 5116 wrote to memory of 4980	5116	Loader.exe	89
PID 5116 wrote to memory of 4980	5116	Loader.exe	89
PID 2848 wrote to memory of 3236	2848	loaderr.exe	91
PID 2848 wrote to memory of 3236	2848	loaderr.exe	91
PID 2848 wrote to memory of 4508	2848	loaderr.exe	93
PID 2848 wrote to memory of 4508	2848	loaderr.exe	93
PID 5088 wrote to memory of 4400	5088	injectdll.exe	95
PID 5088 wrote to memory of 4400	5088	injectdll.exe	95
PID 2848 wrote to memory of 4960	2848	loaderr.exe	97
PID 2848 wrote to memory of 4960	2848	loaderr.exe	97
PID 2848 wrote to memory of 8	2848	loaderr.exe	99
PID 2848 wrote to memory of 8	2848	loaderr.exe	99
PID 2848 wrote to memory of 540	2848	loaderr.exe	101
PID 2848 wrote to memory of 540	2848	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:2688
- 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:5116
- - 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:2848
  - - 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:3236
  - - 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:4508
  - - 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:4960
  - - 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:8
  - - 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:540
- - 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:4980
- 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:5088
- - 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:4400

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
167B

MD5
18af25f0ba0b7586121f0dcfa912dbc5

SHA1
3e2a98061b56364362386884afcea919b8b694e3

SHA256
58fa6c16f2fac53bd140145e2a436cd316c45e8410f9361d84fc714416306519

SHA512
cc461c67c23a3c5190da01afc2afad33431a950273d768b981967245ed4f17c241d0f81f187417cb9c974b8bb12da4af21b2369e7c143942c6aca488d7151c2b

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

Filesize
732B

MD5
5055f6690b6fae798b2e8b7a6be14189

SHA1
5a92e3104938a349804b6bc3a07c8f618f106ba1

SHA256
bc9da40b2a2566c16029cefc9978afd6bbfabfda6e9763441e6f4c037e8755ac

SHA512
31599cdb5b33af0e93bd2ed44683ff357c949a434b6c6398a4572a821b8853ae02083bf0c3e6060d36d2f385f6408c8cd90b6a627343c8d454b4a3769feafda1

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

Filesize
1KB

MD5
6c5957485c3831cccc8d347f496dc324

SHA1
28550e632d4df5d30b6a12b33e3f4a52bddc5595

SHA256
b8916a5f2c483c4f29e20f9822fd4837dbc6634d095d7dadc15abbc2f6247297

SHA512
a7a72d6d5e28bb36aea5722a2bb12b427f8717ced19d1406b0d5d3d6f92486c3fc9163ac8d19e9d8fbcb6c1c416c2139d7795183956e58625b0a6ab8e21772d3

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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
944B

MD5
eb7aebc8f8493b59246f054a352d1551

SHA1
6cf19cea0c8e59c856d305b4a4a060341c91dc69

SHA256
f34bb897fbc228d6f2fc1a5ffa6d536ed38fc4bc4c46bcf9c3393091a9680d80

SHA512
1b1e7bc5c32d85b0463dfe6f2aaf3cf6c1dd55992a8e36307fdff5865b8305fcfe50240213fe44e3d948c19b582839a05e41d4ad98eed5697bc98e37364100ec

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

Filesize
944B

MD5
b51dc9e5ec3c97f72b4ca9488bbb4462

SHA1
5c1e8c0b728cd124edcacefb399bbd5e25b21bd3

SHA256
976f9534aa2976c85c2455bdde786a3f55d63aefdd40942eba1223c4c93590db

SHA512
0e5aa6cf64c535aefb833e5757b68e1094c87424abe2615a7d7d26b1b31eff358d12e36e75ca57fd690a9919b776600bf4c5c0e5a5df55366ba62238bdf3f280

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xzv0t1sz.uvo.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/2688-1-0x00000000007D0000-0x0000000000FE8000-memory.dmp

Filesize
8.1MB

Download
memory/2688-0-0x00007FFB2EC53000-0x00007FFB2EC55000-memory.dmp

Filesize
8KB

Download
memory/2848-246-0x00000000017C0000-0x00000000017CE000-memory.dmp

Filesize
56KB

Download
memory/2848-58-0x0000000000EE0000-0x0000000000EF6000-memory.dmp

Filesize
88KB

Download
memory/3236-188-0x00000238CF7C0000-0x00000238CF7E2000-memory.dmp

Filesize
136KB

Download
memory/3236-200-0x00000238E8250000-0x00000238E83BA000-memory.dmp

Filesize
1.4MB

Download
memory/4508-214-0x00000268EC470000-0x00000268EC5DA000-memory.dmp

Filesize
1.4MB

Download
memory/4980-59-0x00000264354D0000-0x000002643551A000-memory.dmp

Filesize
296KB

Download
memory/5088-27-0x00000000008D0000-0x0000000000912000-memory.dmp

Filesize
264KB

Download
memory/5088-187-0x00007FFB2EC50000-0x00007FFB2F711000-memory.dmp

Filesize
10.8MB

Download
memory/5088-29-0x00007FFB2EC50000-0x00007FFB2F711000-memory.dmp

Filesize
10.8MB

Download
memory/5088-244-0x00007FFB2EC50000-0x00007FFB2F711000-memory.dmp

Filesize
10.8MB

Download
memory/5088-245-0x00007FFB2EC50000-0x00007FFB2F711000-memory.dmp

Filesize
10.8MB

Download
memory/5116-26-0x00000000004A0000-0x0000000000C34000-memory.dmp

Filesize
7.6MB

Download
memory/5116-25-0x00007FFB2EC50000-0x00007FFB2F711000-memory.dmp

Filesize
10.8MB

Download
memory/5116-97-0x00007FFB2EC50000-0x00007FFB2F711000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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