44caliber | 1f2a8237d80c320b6c6ca9c3edeebc244dd3c6708e851a6798263c619eae9aca

General

Target

1f2a8237d80c320b6c6ca9c3edeebc244dd3c6708e851a6798263c619eae9aca.exe
Size

1.5MB
MD5

5a59e468b8d917cb8ab8283f4cc3c73a
SHA1

544420b225c36f3659357534d992cc2e2282b7c0
SHA256

1f2a8237d80c320b6c6ca9c3edeebc244dd3c6708e851a6798263c619eae9aca
SHA512

4f3852de36ad5c486ed8094c0de5ac77fd2e0efdb22ce2cc26bf16628c21b7ac5425dc1634696639b9c62f3e5af350a9c3c48125326bb5801cf3d98a42665bfc
SSDEEP

49152:Fsva6rr9EVAfGqEcBD2JS1NPa/LOj79eB:Fsy6GV32pPReB

Score

10^/10

44caliber spyware stealer

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/1169532958714105867/1ybbaEcwmEndkiHlxdGAYEwGK_q_-J5R_WsnfnPVVZlR8Zo9npE1_nuHQba2_1sthVX_

Signatures

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

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

Processes:

1f2a8237d80c320b6c6ca9c3edeebc244dd3c6708e851a6798263c619eae9aca.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-984744499-3605095035-265325720-1000\Control Panel\International\Geo\Nation	1f2a8237d80c320b6c6ca9c3edeebc244dd3c6708e851a6798263c619eae9aca.exe

Executes dropped EXE 1 IoCs

Processes:

Loader.exe

pid process

3968 Loader.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

26 freegeoip.app
27 freegeoip.app
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

Loader.exe

pid process

3968 Loader.exe
3968 Loader.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1648 3968 WerFault.exe Loader.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

Loader.exe

pid process

3968 Loader.exe
3968 Loader.exe
3968 Loader.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Loader.exe

description pid process

Token: SeDebugPrivilege 3968 Loader.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Loader.exe

pid process

3968 Loader.exe

pid	process
3968	Loader.exe

flow	ioc
26	freegeoip.app
27	freegeoip.app

pid	process
3968	Loader.exe
3968	Loader.exe

pid	pid_target	process	target process
1648	3968	WerFault.exe	Loader.exe

pid	process
3968	Loader.exe
3968	Loader.exe
3968	Loader.exe

description	pid	process
Token: SeDebugPrivilege	3968	Loader.exe

pid	process
3968	Loader.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

1f2a8237d80c320b6c6ca9c3edeebc244dd3c6708e851a6798263c619eae9aca.exe

description	pid	process	target process
PID 4908 wrote to memory of 3968	4908	1f2a8237d80c320b6c6ca9c3edeebc244dd3c6708e851a6798263c619eae9aca.exe	Loader.exe
PID 4908 wrote to memory of 3968	4908	1f2a8237d80c320b6c6ca9c3edeebc244dd3c6708e851a6798263c619eae9aca.exe	Loader.exe
PID 4908 wrote to memory of 3968	4908	1f2a8237d80c320b6c6ca9c3edeebc244dd3c6708e851a6798263c619eae9aca.exe	Loader.exe

C:\Users\Admin\AppData\Local\Temp\1f2a8237d80c320b6c6ca9c3edeebc244dd3c6708e851a6798263c619eae9aca.exe
"C:\Users\Admin\AppData\Local\Temp\1f2a8237d80c320b6c6ca9c3edeebc244dd3c6708e851a6798263c619eae9aca.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4908

C:\Users\Admin\AppData\Local\Temp\RarSFX0\Loader.exe
"C:\Users\Admin\AppData\Local\Temp\RarSFX0\Loader.exe"
2⤵
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:3968

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3968 -s 1556
3⤵
- Program crash
PID:1648

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3968 -ip 3968
1⤵
PID:2172

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

Query Registry

1

T1012

System Information Discovery

2

T1082

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\Local\44\Browsers\Firefox\Bookmarks.txt
Filesize
105B

MD5
2e9d094dda5cdc3ce6519f75943a4ff4

SHA1
5d989b4ac8b699781681fe75ed9ef98191a5096c

SHA256
c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

SHA512
d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Loader.exe
Filesize
1.2MB

MD5
d372d261329ae8563988a45e98e74f3a

SHA1
6ce094dc64d42e4a43d7c7aa26cc72014b5b93da

SHA256
d567ba0373f7eccbb3b13fff03449b763131fefc54665f4911bc7e386805653e

SHA512
7a10b79116a36783937959ba8d1c76736eb6699dbd5983089fd2a88cd9415851ff85bb0ac74971fbfa22830d6c2793dd8f4b2731609b19a6516422b0f14d6afc

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Loader.exe
Filesize
1.2MB

MD5
d372d261329ae8563988a45e98e74f3a

SHA1
6ce094dc64d42e4a43d7c7aa26cc72014b5b93da

SHA256
d567ba0373f7eccbb3b13fff03449b763131fefc54665f4911bc7e386805653e

SHA512
7a10b79116a36783937959ba8d1c76736eb6699dbd5983089fd2a88cd9415851ff85bb0ac74971fbfa22830d6c2793dd8f4b2731609b19a6516422b0f14d6afc

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Loader.exe
Filesize
1.2MB

MD5
d372d261329ae8563988a45e98e74f3a

SHA1
6ce094dc64d42e4a43d7c7aa26cc72014b5b93da

SHA256
d567ba0373f7eccbb3b13fff03449b763131fefc54665f4911bc7e386805653e

SHA512
7a10b79116a36783937959ba8d1c76736eb6699dbd5983089fd2a88cd9415851ff85bb0ac74971fbfa22830d6c2793dd8f4b2731609b19a6516422b0f14d6afc

Download Submit
memory/3968-12-0x0000000000160000-0x0000000000518000-memory.dmp

Filesize
3.7MB

Download
memory/3968-13-0x0000000000160000-0x0000000000518000-memory.dmp

Filesize
3.7MB

Download
memory/3968-14-0x0000000072FE0000-0x0000000073790000-memory.dmp

Filesize
7.7MB

Download
memory/3968-15-0x0000000005530000-0x0000000005540000-memory.dmp

Filesize
64KB

Download
memory/3968-49-0x0000000000160000-0x0000000000518000-memory.dmp

Filesize
3.7MB

Download
memory/3968-50-0x0000000072FE0000-0x0000000073790000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing