44caliber | 8298df16c667b88f524bf2cbb79c7f1122fe0f1c95502c5a4e37fa69999affcb

General

Target

6618325d64a870040b82fb73575ee669.exe
Size

1.5MB
MD5

6618325d64a870040b82fb73575ee669
SHA1

5a7a92a76a832d7a5fc37577af8ebb7078cff6e2
SHA256

8298df16c667b88f524bf2cbb79c7f1122fe0f1c95502c5a4e37fa69999affcb
SHA512

641e2c1b6b4c0d1efa590511ead2f46154367a6a9a0a7ac3b7791e2f285214bd8b7ed2309b5c5e59c66475931a2f5245268f99e44f820ecd2bedbb2f6bd233c9
SSDEEP

24576:JhvJVJdMJ7uLp3iEOwnBYnRIOzm3QHxumDWsWT+T6kcfTj4WEs4x8Ka23x:x3dXLp3iEOwnk8BmDCTdkcojxpx

Score

10^/10

44caliber spyware stealer

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/866738169181372456/leUwW_rAYekiwOVhgk8WOe6mYy271-wPgyPdfdgGkW3LvRIrgaePX3yC-m_SGyjcPYeJ

Signatures

44Caliber
An open source infostealer written in C#.
stealer 44caliber
Executes dropped EXE 1 IoCs

Processes:

ST.exe

pid process

2660 ST.exe

pid	process
2660	ST.exe

Loads dropped DLL 4 IoCs

Processes:

6618325d64a870040b82fb73575ee669.exe

pid	process
1836	6618325d64a870040b82fb73575ee669.exe
1836	6618325d64a870040b82fb73575ee669.exe
1836	6618325d64a870040b82fb73575ee669.exe
1836	6618325d64a870040b82fb73575ee669.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
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

4 freegeoip.app
5 freegeoip.app
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

ST.exe

pid process

2660 ST.exe
2660 ST.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
4	freegeoip.app
5	freegeoip.app

pid	process
2660	ST.exe
2660	ST.exe

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:

ST.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	ST.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	ST.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

ST.exe

pid process

2660 ST.exe
2660 ST.exe
2660 ST.exe
2660 ST.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

ST.exe

description pid process

Token: SeDebugPrivilege 2660 ST.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

ST.exe

pid process

2660 ST.exe

pid	process
2660	ST.exe
2660	ST.exe
2660	ST.exe
2660	ST.exe

description	pid	process
Token: SeDebugPrivilege	2660	ST.exe

pid	process
2660	ST.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

6618325d64a870040b82fb73575ee669.exe

description	pid	process	target process
PID 1836 wrote to memory of 2660	1836	6618325d64a870040b82fb73575ee669.exe	ST.exe
PID 1836 wrote to memory of 2660	1836	6618325d64a870040b82fb73575ee669.exe	ST.exe
PID 1836 wrote to memory of 2660	1836	6618325d64a870040b82fb73575ee669.exe	ST.exe
PID 1836 wrote to memory of 2660	1836	6618325d64a870040b82fb73575ee669.exe	ST.exe

C:\Users\Admin\AppData\Local\Temp\6618325d64a870040b82fb73575ee669.exe
"C:\Users\Admin\AppData\Local\Temp\6618325d64a870040b82fb73575ee669.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1836

C:\Users\Admin\AppData\Local\Temp\ST.exe
"C:\Users\Admin\AppData\Local\Temp\ST.exe"
2⤵
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2660

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

System Information Discovery

2

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Data from Local System

2

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\44\Browsers\Firefox\Bookmarks.txt
Filesize
105B

MD5
2e9d094dda5cdc3ce6519f75943a4ff4

SHA1
5d989b4ac8b699781681fe75ed9ef98191a5096c

SHA256
c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

SHA512
d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

Download Submit
\Users\Admin\AppData\Local\Temp\ST.exe
Filesize
1.2MB

MD5
0d1ce9ec311262c574e65633549c9c4a

SHA1
541ba677282a00d73a18fc06123cf7c61a1d1f57

SHA256
64f4e1cdebbb2d16e19e189aa15ac511039b998d837b04aa34fca073084af019

SHA512
daa70c786ac049a18132718ec3bb05480cc97ff92419f9bb78614e93de2dff9c8d034c823ecad7a2323c52a554d83ee826d9c46e3a1c4942e842a3597074e96d

Download Submit
memory/1836-6-0x00000000037D0000-0x0000000003B7E000-memory.dmp

Filesize
3.7MB

Download
memory/1836-15-0x00000000037D0000-0x0000000003B7E000-memory.dmp

Filesize
3.7MB

Download
memory/2660-18-0x0000000000380000-0x000000000072E000-memory.dmp

Filesize
3.7MB

Download
memory/2660-19-0x0000000074540000-0x0000000074C2E000-memory.dmp

Filesize
6.9MB

Download
memory/2660-20-0x00000000058C0000-0x0000000005900000-memory.dmp

Filesize
256KB

Download
memory/2660-70-0x0000000000380000-0x000000000072E000-memory.dmp

Filesize
3.7MB

Download
memory/2660-71-0x0000000074540000-0x0000000074C2E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

Loading Replay Monitor...

Downloads