44caliber | 3343644e85fc33f8cd3b97e0f7275053f1c272932379c61b3c0d3c620a23a4ee

Resubmissions

08-02-2024 19:42

240208-ye7cksbg28 10

08-02-2024 19:33

240208-x9kavshh6s 10

Analysis

max time kernel
84s
max time network
91s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
08-02-2024 19:42

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General

Target

Korepi/Korepi.exe
Size

274KB
MD5

efa2b41e3fad6f9748f69cee22300fd8
SHA1

9989d14b2b6876f53969ca4346109fd377013a71
SHA256

f8caf6d4c0c782dc6f40399a72286412dba50c081c38efee96417910516e0123
SHA512

2bca7353443a8e771abdd71780545f08e20d9231161802a7d838860f6149c07bf912142cf2c2def98439ee3d8904c65fb7f0a2f229dcf73575270062c3f60ec6
SSDEEP

6144:Af+BLtABPDLgj1xw1eO5rbMMzhgUsYqTXGRFafTyElI1D05KJ:r161eO5rbHHsYqTXGtp1DDJ

Score

10^/10

44caliber spyware stealer

Malware Config

Extracted

Family

44caliber

https://discord.com/api/webhooks/1204820036871651418/CUplXl5h8mK8wayRD4L98BI20GJlZ7pUqazPKIFG3k71PQZAQLEztS-LsGq873wkB2Tf

Signatures

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

8 freegeoip.app
9 freegeoip.app

flow	ioc
8	freegeoip.app
9	freegeoip.app

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:

Korepi.exe

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

Korepi.exe

pid process

4812 Korepi.exe
4812 Korepi.exe
4812 Korepi.exe
4812 Korepi.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Korepi.exe

description pid process

Token: SeDebugPrivilege 4812 Korepi.exe

pid	process
4812	Korepi.exe
4812	Korepi.exe
4812	Korepi.exe
4812	Korepi.exe

description	pid	process
Token: SeDebugPrivilege	4812	Korepi.exe

C:\Users\Admin\AppData\Local\Temp\Korepi\Korepi.exe
"C:\Users\Admin\AppData\Local\Temp\Korepi\Korepi.exe"
1⤵
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4812

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:2988

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\44\Process.txt

Filesize
1KB

MD5
e4ce0acced04cca31b588391133a73ae

SHA1
470f0ad819f5a5ae30ac67d26a43b117353ea915

SHA256
0dba4564105296aa7bb20f3ee439587794cf04d8c360097bfe77244d17bb69ed

SHA512
80fa56cd2673b0eba138be6c7dbe391edf9e1609f329ef3688305e43351c5e0699e8606d3c144201fe1a8f411c21fff6a32b9f05e944a1b383d3057591cf6851

Download Submit
memory/4812-0-0x0000017CD27A0000-0x0000017CD27EA000-memory.dmp

Filesize
296KB

Download
memory/4812-28-0x00007FFCCFF50000-0x00007FFCD0A11000-memory.dmp

Filesize
10.8MB

Download
memory/4812-29-0x0000017CECDB0000-0x0000017CECDC0000-memory.dmp

Filesize
64KB

Download
memory/4812-118-0x00007FFCCFF50000-0x00007FFCD0A11000-memory.dmp

Filesize
10.8MB

Download