44caliber | 994d73477a5e2a22bf00a7898bc2b8ad784ec844bc27dbc43c3aa5576d3ec397

General

Target
nyen2eabmfb.exe
Size 1.3MB
Sample240819-t13jasvbma
SHA256 994d73477a5e2a22bf00a7898bc2b8ad784ec844bc27dbc43c3aa5576d3ec397
MD5 7ce622cc13886a55bfce9bcc088c8dc6
SHA1 6aa21ea3cbd05b2727c2f7cd5328532d617c0dd0
SHA512 d824d400f0663b3c7ad2a81a4fc449b78d1a01e97517168245716d2b454c7fc4e1bbc09af56a9913462626184a5db0b6f65ce77f2d5eb1ed39c5ed3bb505efad
SSDEEP 24576:fF6kcnUDuwg5tW2l8Ye01R7E/k3vy8OKtlm0PDwVOt3PAThh9qAM:0Lnw69lLeOhbq+GOt3PO5dM
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

44caliber credential_access discovery spyware stealer

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/1274462328603148298/RG8TQ5NOTPK7lllW9DXds8Z7Vj68QWZX7Duc-LfDNeqa_HouSEGlNyNzsrVH6EfQxrh8

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
2608	Insidious_protected.exe

Loads dropped DLL 9 IoCs

pid	Process
1816	nyen2eabmfb.exe
1816	nyen2eabmfb.exe
1816	nyen2eabmfb.exe
1816	nyen2eabmfb.exe
2504	WerFault.exe
2504	WerFault.exe
2504	WerFault.exe
2504	WerFault.exe
2504	WerFault.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 1 IoCs

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

flow	ioc
2	freegeoip.app

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2608	Insidious_protected.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2504	2608	WerFault.exe	30

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Insidious_protected.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nyen2eabmfb.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2608	Insidious_protected.exe
2608	Insidious_protected.exe
2608	Insidious_protected.exe
2608	Insidious_protected.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2608	Insidious_protected.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2608	Insidious_protected.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1816 wrote to memory of 2608	1816	nyen2eabmfb.exe	30
PID 1816 wrote to memory of 2608	1816	nyen2eabmfb.exe	30
PID 1816 wrote to memory of 2608	1816	nyen2eabmfb.exe	30
PID 1816 wrote to memory of 2608	1816	nyen2eabmfb.exe	30
PID 1816 wrote to memory of 2608	1816	nyen2eabmfb.exe	30
PID 1816 wrote to memory of 2608	1816	nyen2eabmfb.exe	30
PID 1816 wrote to memory of 2608	1816	nyen2eabmfb.exe	30
PID 2608 wrote to memory of 2504	2608	Insidious_protected.exe	31
PID 2608 wrote to memory of 2504	2608	Insidious_protected.exe	31
PID 2608 wrote to memory of 2504	2608	Insidious_protected.exe	31
PID 2608 wrote to memory of 2504	2608	Insidious_protected.exe	31
PID 2608 wrote to memory of 2504	2608	Insidious_protected.exe	31
PID 2608 wrote to memory of 2504	2608	Insidious_protected.exe	31
PID 2608 wrote to memory of 2504	2608	Insidious_protected.exe	31

C:\Users\Admin\AppData\Local\Temp\nyen2eabmfb.exe
"C:\Users\Admin\AppData\Local\Temp\nyen2eabmfb.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1816
- C:\Users\Admin\AppData\Local\Temp\Insidious_protected.exe
  "C:\Users\Admin\AppData\Local\Temp\Insidious_protected.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2608
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2608 -s 1168
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:2504

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

Insidious_protected.exe

Path C:\Users\Admin\AppData\Local\Temp\Insidious_protected.exe
Size 1.2MB
SHA256 d5a18b44a40e9bc1952bce6e187b81926ffd358aa5ebe95921cde2b9a72b172f
MD5 d9ccde3b728fba6d6e3f1b92c75a11a8
SHA1 b0bbe87ae7519b5d6dcd7f6282e891922971942d
SHA512 738f1b568009a6df2fcaf2f1c8aba6aee91b4a66474e095d6e483b72ebf1d5309d33908dd1531407a69520b657bdfa75c6b3eda796c20bf1542b632030e58db4
SSDEEP 24576:c1VJqwlZcf4XH1yfEXk3vc8W/jr1STXLmPz63V2HTiViv4qWVLiO6:c1VrlSfI1WlE7/ITq76lslAZxiO6
MD5 SHA1 SHA512 SSDEEP

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memory/1816-15-0x0000000003E60000-0x000000000421A000-memory.dmp

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memory/1816-14-0x0000000003E60000-0x000000000421A000-memory.dmp

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memory/2608-17-0x0000000001010000-0x00000000013CA000-memory.dmp

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memory/2608-19-0x0000000001010000-0x00000000013CA000-memory.dmp

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memory/2608-20-0x0000000001010000-0x00000000013CA000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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