44caliber | 518f22ac3dfb39779d6b21fdd230b71db39453f73b42f411009a0afe7dbbe818

Analysis

max time kernel
151s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18-02-2024 05:45

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General

Target

518f22ac3dfb39779d6b21fdd230b71db39453f73b42f411009a0afe7dbbe818.exe
Size

460KB
MD5

3e5ba25aa4f23ceb11be209d1967e341
SHA1

c25a05acb5231776456d08fad7df0e48d92931c0
SHA256

518f22ac3dfb39779d6b21fdd230b71db39453f73b42f411009a0afe7dbbe818
SHA512

184243d51766bf8d292308e0177046f88e0eb55201eddc9d14670dd3d526c5ed6026c03c88227698670f451f43a3e4f1378f51f2334a9b54d83bb2bc677b0c04
SSDEEP

6144:jE+yclwQKjdn+WPtYVJIoBfRT+tkbOSeC2xDjAzQeOOg7Y55HkVSGsc:jBdlwHRn+WlYV+8T+tkKC0EEE17HkV8c

Score

10^/10

44caliber evasion persistence spyware stealer

Malware Config

Extracted

Family

44caliber

https://discord.com/api/webhooks/1199323175729758268/CBdP8e3cXbL0ED8xKBhMw0ikKHmITu-6CI4WjfttZm2aWGZGjp43Msrjwp8AVeEBf6T1

Signatures

44Caliber
An open source infostealer written in C#.
stealer 44caliber

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 3 IoCs

resource	yara_rule
behavioral2/files/0x000700000002312b-6.dat	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/files/0x000700000002312b-12.dat	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/884-14-0x00000227E7EB0000-0x00000227E7F3A000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects executables Discord URL observed in first stage droppers 3 IoCs

resource	yara_rule
behavioral2/files/0x000700000002312b-6.dat	INDICATOR_SUSPICIOUS_EXE_DiscordURL
behavioral2/files/0x000700000002312b-12.dat	INDICATOR_SUSPICIOUS_EXE_DiscordURL
behavioral2/memory/884-14-0x00000227E7EB0000-0x00000227E7F3A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_DiscordURL

Detects executables referencing Discord tokens regular expressions 3 IoCs

resource	yara_rule
behavioral2/files/0x000700000002312b-6.dat	INDICATOR_SUSPICIOUS_EXE_Discord_Regex
behavioral2/files/0x000700000002312b-12.dat	INDICATOR_SUSPICIOUS_EXE_Discord_Regex
behavioral2/memory/884-14-0x00000227E7EB0000-0x00000227E7F3A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_Discord_Regex

Detects executables referencing credit card regular expressions 3 IoCs

resource	yara_rule
behavioral2/files/0x000700000002312b-6.dat	INDICATOR_SUSPICIOUS_EXE_CC_Regex
behavioral2/files/0x000700000002312b-12.dat	INDICATOR_SUSPICIOUS_EXE_CC_Regex
behavioral2/memory/884-14-0x00000227E7EB0000-0x00000227E7F3A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_CC_Regex

Detects executables referencing many VPN software clients. Observed in infosteslers 3 IoCs

resource	yara_rule
behavioral2/files/0x000700000002312b-6.dat	INDICATOR_SUSPICIOUS_EXE_References_VPN
behavioral2/files/0x000700000002312b-12.dat	INDICATOR_SUSPICIOUS_EXE_References_VPN
behavioral2/memory/884-14-0x00000227E7EB0000-0x00000227E7F3A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_References_VPN

Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 3 IoCs

resource	yara_rule
behavioral2/files/0x000700000002312b-6.dat	INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
behavioral2/files/0x000700000002312b-12.dat	INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
behavioral2/memory/884-14-0x00000227E7EB0000-0x00000227E7F3A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
232	netsh.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	518f22ac3dfb39779d6b21fdd230b71db39453f73b42f411009a0afe7dbbe818.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\9902b29d6de7130c2f409ab27fb09fa7.exe	3.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\9902b29d6de7130c2f409ab27fb09fa7.exe	3.exe

Executes dropped EXE 2 IoCs

pid	Process
884	1.exe
2288	3.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-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\9902b29d6de7130c2f409ab27fb09fa7 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\3.exe\" .."	3.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\9902b29d6de7130c2f409ab27fb09fa7 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\3.exe\" .."	3.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
7	freegeoip.app
8	freegeoip.app

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	1.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	1.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
884	1.exe
884	1.exe
884	1.exe
884	1.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe
2288	3.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2288	3.exe

Suspicious use of AdjustPrivilegeToken 34 IoCs

description	pid	Process
Token: SeDebugPrivilege	884	1.exe
Token: SeDebugPrivilege	2288	3.exe
Token: 33	2288	3.exe
Token: SeIncBasePriorityPrivilege	2288	3.exe
Token: 33	2288	3.exe
Token: SeIncBasePriorityPrivilege	2288	3.exe
Token: 33	2288	3.exe
Token: SeIncBasePriorityPrivilege	2288	3.exe
Token: 33	2288	3.exe
Token: SeIncBasePriorityPrivilege	2288	3.exe
Token: 33	2288	3.exe
Token: SeIncBasePriorityPrivilege	2288	3.exe
Token: 33	2288	3.exe
Token: SeIncBasePriorityPrivilege	2288	3.exe
Token: 33	2288	3.exe
Token: SeIncBasePriorityPrivilege	2288	3.exe
Token: 33	2288	3.exe
Token: SeIncBasePriorityPrivilege	2288	3.exe
Token: 33	2288	3.exe
Token: SeIncBasePriorityPrivilege	2288	3.exe
Token: 33	2288	3.exe
Token: SeIncBasePriorityPrivilege	2288	3.exe
Token: 33	2288	3.exe
Token: SeIncBasePriorityPrivilege	2288	3.exe
Token: 33	2288	3.exe
Token: SeIncBasePriorityPrivilege	2288	3.exe
Token: 33	2288	3.exe
Token: SeIncBasePriorityPrivilege	2288	3.exe
Token: 33	2288	3.exe
Token: SeIncBasePriorityPrivilege	2288	3.exe
Token: 33	2288	3.exe
Token: SeIncBasePriorityPrivilege	2288	3.exe
Token: 33	2288	3.exe
Token: SeIncBasePriorityPrivilege	2288	3.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4704 wrote to memory of 884	4704	518f22ac3dfb39779d6b21fdd230b71db39453f73b42f411009a0afe7dbbe818.exe	83
PID 4704 wrote to memory of 884	4704	518f22ac3dfb39779d6b21fdd230b71db39453f73b42f411009a0afe7dbbe818.exe	83
PID 4704 wrote to memory of 2288	4704	518f22ac3dfb39779d6b21fdd230b71db39453f73b42f411009a0afe7dbbe818.exe	85
PID 4704 wrote to memory of 2288	4704	518f22ac3dfb39779d6b21fdd230b71db39453f73b42f411009a0afe7dbbe818.exe	85
PID 4704 wrote to memory of 2288	4704	518f22ac3dfb39779d6b21fdd230b71db39453f73b42f411009a0afe7dbbe818.exe	85
PID 2288 wrote to memory of 232	2288	3.exe	89
PID 2288 wrote to memory of 232	2288	3.exe	89
PID 2288 wrote to memory of 232	2288	3.exe	89

C:\Users\Admin\AppData\Local\Temp\518f22ac3dfb39779d6b21fdd230b71db39453f73b42f411009a0afe7dbbe818.exe
"C:\Users\Admin\AppData\Local\Temp\518f22ac3dfb39779d6b21fdd230b71db39453f73b42f411009a0afe7dbbe818.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4704
- C:\Users\Admin\AppData\Local\Temp\1.exe
  "C:\Users\Admin\AppData\Local\Temp\1.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:884
- C:\Users\Admin\AppData\Local\Temp\3.exe
  "C:\Users\Admin\AppData\Local\Temp\3.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2288
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\3.exe" "3.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:232

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

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
700B

MD5
da3fde1fbda42ae91ccd9c950024dfb1

SHA1
c0e8e86feabb22cc2c9f4a989156418eaa4f94d6

SHA256
75f0a24def355fcf3a302e72cc086a9d05e8754bdbcf71e418031751356ec3d3

SHA512
99cececd0ce3b6a5e9a10fdba960afc8053af79624d7f583f9157ac3b0ca1f471304384df418217a16b9f6bde91f6477a336ece8700e24a7ff241a1e75e6b09a

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

Filesize
1KB

MD5
2ac7e51695c747cb64c4857b8e937406

SHA1
6932f47cd2d6542f49597d3524f22a33eeffca42

SHA256
ca866de7d5d78af3510476649d7bd769524d110c0307547c5406932813ffc97a

SHA512
e311d152649a52ababb3e54d7149537ce21a1c5d5aea4a6369d79cb02c161e9663835bbb5d8676cefb07faca2ed51092d26328446e3177346c37803ed62f8637

Download Submit
C:\Users\Admin\AppData\Local\Temp\1.exe

Filesize
534KB

MD5
0ce3051b867d50aa172d1b332f156e3e

SHA1
f87defe312cb3a5efea3f845d187762e153bddab

SHA256
5ac29f18472f943f2eb3c256fdbfe251b04ca66afc22fcba65183b0509feb529

SHA512
5169a3acd3c79cc4d22bf3a1f4d9770797d2c31503bab1022a153ad56c382e495de2ce06a8a04b3bb4b2fb2c666575dcdefa26533ff5affc4b6ce126e2166193

Download Submit
C:\Users\Admin\AppData\Local\Temp\1.exe

Filesize
308KB

MD5
cb44cb64513abb0ab881098dfdd5e516

SHA1
99077ea69d4a00d65fdeaf13d16d9be6702da8ce

SHA256
63183189ec9ffe050cf7365bff0bf62d7c7e4218ce0ebd1a20ed85405a2a7d72

SHA512
8ec53b98b38bce690dfd2ca032cb2d51e5a0b5b72e7ec79c4c7dc0044e8726a828fe6d7a985ea6b20e55f4326b07961c958ee2561d12530b8863472f5ce2841c

Download Submit
C:\Users\Admin\AppData\Local\Temp\3.exe

Filesize
37KB

MD5
6d11195af6cca04eb53eccf9aaf329dc

SHA1
85f70d6fcff5212649deaf1d18e66d563727c186

SHA256
4c690a994e22eb6aa31af6e552b610ea1ff01ac58622d56232ad6e820c2aa414

SHA512
76a59b8164a478691d14be7e5d002280ec5453cb6d9f73387ad45e49755d03927f3814c42df987a4dc61c942e9e7b25ab9559651981020bf53ad56a8e4e65c8b

Download Submit
memory/884-19-0x00007FFCA8950000-0x00007FFCA9411000-memory.dmp

Filesize
10.8MB

Download
memory/884-22-0x00000227EA3D0000-0x00000227EA3E0000-memory.dmp

Filesize
64KB

Download
memory/884-14-0x00000227E7EB0000-0x00000227E7F3A000-memory.dmp

Filesize
552KB

Download
memory/884-145-0x00007FFCA8950000-0x00007FFCA9411000-memory.dmp

Filesize
10.8MB

Download
memory/2288-55-0x0000000075380000-0x0000000075931000-memory.dmp

Filesize
5.7MB

Download
memory/2288-56-0x0000000075380000-0x0000000075931000-memory.dmp

Filesize
5.7MB

Download
memory/2288-57-0x00000000017C0000-0x00000000017D0000-memory.dmp

Filesize
64KB

Download
memory/2288-147-0x0000000075380000-0x0000000075931000-memory.dmp

Filesize
5.7MB

Download
memory/2288-148-0x0000000075380000-0x0000000075931000-memory.dmp

Filesize
5.7MB

Download
memory/2288-149-0x00000000017C0000-0x00000000017D0000-memory.dmp

Filesize
64KB

Download