44caliber | 14430e71914c83f8d1de8e66caa39d07ab782efb662245fb9eff6aa9fca7ce87

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
03-08-2024 19:25

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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

Detect Xworm Payload 8 IoCs

Processes:

resource	yara_rule
behavioral2/files/0x00070000000186ca-10.dat	family_xworm
behavioral2/memory/2216-12-0x0000000000D70000-0x0000000000DB2000-memory.dmp	family_xworm
behavioral2/files/0x00060000000186d9-17.dat	family_xworm
behavioral2/memory/880-32-0x0000000001020000-0x0000000001036000-memory.dmp	family_xworm
behavioral2/memory/2796-133-0x0000000000980000-0x0000000000996000-memory.dmp	family_xworm
behavioral2/memory/1444-135-0x0000000000F70000-0x0000000000FB2000-memory.dmp	family_xworm
behavioral2/memory/2432-138-0x0000000000C50000-0x0000000000C66000-memory.dmp	family_xworm
behavioral2/memory/2140-139-0x0000000000FF0000-0x0000000001032000-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
3040	powershell.exe
2428	powershell.exe
1684	powershell.exe
2316	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 8 IoCs

Processes:

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

pid	Process
576	Loader.exe
2216	injectdll.exe
880	loaderr.exe
2860	fixer.exe
1444	svhost.exe
2796	svchost.exe
2140	svhost.exe
2432	svchost.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\svhost = "C:\\Users\\Admin\\AppData\\Roaming\\svhost.exe"	injectdll.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\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
4	freegeoip.app
7	freegeoip.app
10	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
1544	schtasks.exe
3036	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

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

pid	Process
2860	fixer.exe
2860	fixer.exe
2860	fixer.exe
2860	fixer.exe
3040	powershell.exe
2428	powershell.exe
1684	powershell.exe
2316	powershell.exe
2216	injectdll.exe
880	loaderr.exe

Suspicious use of AdjustPrivilegeToken 13 IoCs

Processes:

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

description	pid	Process
Token: SeDebugPrivilege	2216	injectdll.exe
Token: SeDebugPrivilege	880	loaderr.exe
Token: SeDebugPrivilege	2860	fixer.exe
Token: SeDebugPrivilege	3040	powershell.exe
Token: SeDebugPrivilege	2428	powershell.exe
Token: SeDebugPrivilege	1684	powershell.exe
Token: SeDebugPrivilege	2316	powershell.exe
Token: SeDebugPrivilege	2216	injectdll.exe
Token: SeDebugPrivilege	880	loaderr.exe
Token: SeDebugPrivilege	2796	svchost.exe
Token: SeDebugPrivilege	1444	svhost.exe
Token: SeDebugPrivilege	2432	svchost.exe
Token: SeDebugPrivilege	2140	svhost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

injectdll.exeloaderr.exe

pid	Process
2216	injectdll.exe
880	loaderr.exe

Suspicious use of WriteProcessMemory 42 IoCs

Processes:

Loader V2.exeLoader.exeloaderr.exeinjectdll.exetaskeng.exe

description	pid	Process	procid_target
PID 2284 wrote to memory of 576	2284	Loader V2.exe	30
PID 2284 wrote to memory of 576	2284	Loader V2.exe	30
PID 2284 wrote to memory of 576	2284	Loader V2.exe	30
PID 2284 wrote to memory of 2216	2284	Loader V2.exe	31
PID 2284 wrote to memory of 2216	2284	Loader V2.exe	31
PID 2284 wrote to memory of 2216	2284	Loader V2.exe	31
PID 576 wrote to memory of 880	576	Loader.exe	32
PID 576 wrote to memory of 880	576	Loader.exe	32
PID 576 wrote to memory of 880	576	Loader.exe	32
PID 576 wrote to memory of 2860	576	Loader.exe	33
PID 576 wrote to memory of 2860	576	Loader.exe	33
PID 576 wrote to memory of 2860	576	Loader.exe	33
PID 880 wrote to memory of 3040	880	loaderr.exe	36
PID 880 wrote to memory of 3040	880	loaderr.exe	36
PID 880 wrote to memory of 3040	880	loaderr.exe	36
PID 880 wrote to memory of 2428	880	loaderr.exe	38
PID 880 wrote to memory of 2428	880	loaderr.exe	38
PID 880 wrote to memory of 2428	880	loaderr.exe	38
PID 880 wrote to memory of 1684	880	loaderr.exe	40
PID 880 wrote to memory of 1684	880	loaderr.exe	40
PID 880 wrote to memory of 1684	880	loaderr.exe	40
PID 880 wrote to memory of 2316	880	loaderr.exe	42
PID 880 wrote to memory of 2316	880	loaderr.exe	42
PID 880 wrote to memory of 2316	880	loaderr.exe	42
PID 2216 wrote to memory of 1544	2216	injectdll.exe	44
PID 2216 wrote to memory of 1544	2216	injectdll.exe	44
PID 2216 wrote to memory of 1544	2216	injectdll.exe	44
PID 880 wrote to memory of 3036	880	loaderr.exe	46
PID 880 wrote to memory of 3036	880	loaderr.exe	46
PID 880 wrote to memory of 3036	880	loaderr.exe	46
PID 2900 wrote to memory of 2796	2900	taskeng.exe	49
PID 2900 wrote to memory of 2796	2900	taskeng.exe	49
PID 2900 wrote to memory of 2796	2900	taskeng.exe	49
PID 2900 wrote to memory of 1444	2900	taskeng.exe	50
PID 2900 wrote to memory of 1444	2900	taskeng.exe	50
PID 2900 wrote to memory of 1444	2900	taskeng.exe	50
PID 2900 wrote to memory of 2432	2900	taskeng.exe	51
PID 2900 wrote to memory of 2432	2900	taskeng.exe	51
PID 2900 wrote to memory of 2432	2900	taskeng.exe	51
PID 2900 wrote to memory of 2140	2900	taskeng.exe	52
PID 2900 wrote to memory of 2140	2900	taskeng.exe	52
PID 2900 wrote to memory of 2140	2900	taskeng.exe	52

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:2284
- C:\Users\Admin\AppData\Roaming\Loader.exe
  "C:\Users\Admin\AppData\Roaming\Loader.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:576
- - 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:880
  - - 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:3040
  - - 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:2428
  - - 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:1684
  - - 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:2316
  - - 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:3036
- - 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:2860
- 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:2216
- - 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:1544

C:\Windows\system32\taskeng.exe
taskeng.exe {99BFED80-D668-40EA-9B73-B9EEB7C90C57} S-1-5-21-2703099537-420551529-3771253338-1000:XECUDNCD\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2900
- C:\Users\Admin\AppData\Local\svchost.exe
  C:\Users\Admin\AppData\Local\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2796
- C:\Users\Admin\AppData\Roaming\svhost.exe
  C:\Users\Admin\AppData\Roaming\svhost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1444
- C:\Users\Admin\AppData\Local\svchost.exe
  C:\Users\Admin\AppData\Local\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2432
- C:\Users\Admin\AppData\Roaming\svhost.exe
  C:\Users\Admin\AppData\Roaming\svhost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2140

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\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\Microsoft\Windows\Recent\CustomDestinations\5PI15Y0IV88POJ21VIMF.temp

Filesize
7KB

MD5
1a71cf80330d6ec5601452020cc13180

SHA1
37991d534b0d32ad40b7f74535f923cc747fc680

SHA256
14890a5443c6c588962875dbb583ad97295a7396a1d12a19de1bfe1c9d8e0500

SHA512
e33f71123cdcdc52ea7414b85c4fb9db7969d7b3682ce4315dd123f59c79dbb8143f8383aaaf2a21bb09bed93cab08f5eed453381b40d69c5a2e7042f88e71ae

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

Filesize
244KB

MD5
74ffb0d60d647dd6ad8d00c1bee48011

SHA1
4c8a707a33b35b78f374c66d59f9c2314c20b25f

SHA256
b481f1e0cfe25e5f19da0a0333c78661bf5c75c0b1c616ff4aaaa07aed31efd1

SHA512
fc667f4560d6b19a9a4f37eb0e66c751eb348ffc0db69c7d0bd733dfd2df2dfdadc7b780cd93686350444cc14a54283bafe3afec611bcac3ad0239eda659f46c

Download Submit
memory/576-35-0x000007FEF57F0000-0x000007FEF61DC000-memory.dmp

Filesize
9.9MB

Download
memory/576-13-0x0000000001360000-0x0000000001AF4000-memory.dmp

Filesize
7.6MB

Download
memory/576-59-0x000007FEF57F0000-0x000007FEF61DC000-memory.dmp

Filesize
9.9MB

Download
memory/880-32-0x0000000001020000-0x0000000001036000-memory.dmp

Filesize
88KB

Download
memory/1444-135-0x0000000000F70000-0x0000000000FB2000-memory.dmp

Filesize
264KB

Download
memory/2140-139-0x0000000000FF0000-0x0000000001032000-memory.dmp

Filesize
264KB

Download
memory/2216-12-0x0000000000D70000-0x0000000000DB2000-memory.dmp

Filesize
264KB

Download
memory/2284-0-0x000007FEF57F3000-0x000007FEF57F4000-memory.dmp

Filesize
4KB

Download
memory/2284-1-0x0000000000880000-0x0000000001098000-memory.dmp

Filesize
8.1MB

Download
memory/2428-107-0x0000000001DB0000-0x0000000001DB8000-memory.dmp

Filesize
32KB

Download
memory/2428-106-0x000000001B5A0000-0x000000001B882000-memory.dmp

Filesize
2.9MB

Download
memory/2432-138-0x0000000000C50000-0x0000000000C66000-memory.dmp

Filesize
88KB

Download
memory/2796-133-0x0000000000980000-0x0000000000996000-memory.dmp

Filesize
88KB

Download
memory/2860-31-0x00000000003B0000-0x00000000003FA000-memory.dmp

Filesize
296KB

Download
memory/3040-100-0x0000000002320000-0x0000000002328000-memory.dmp

Filesize
32KB

Download
memory/3040-99-0x000000001B6D0000-0x000000001B9B2000-memory.dmp

Filesize
2.9MB

Download