44caliber | 3343644e85fc33f8cd3b97e0f7275053f1c272932379c61b3c0d3c620a23a4ee

Resubmissions

08-02-2024 19:42

240208-ye7cksbg28 10

08-02-2024 19:33

240208-x9kavshh6s 10

Analysis

max time kernel
126s
max time network
131s
platform
windows10-1703_x64
resource
win10-20231220-en
resource tags

arch:x64arch:x86image:win10-20231220-enlocale:en-usos:windows10-1703-x64system
submitted
08-02-2024 19:33

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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.

flow	ioc
1	freegeoip.app
2	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

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2196	Korepi.exe
2196	Korepi.exe
2196	Korepi.exe
2196	Korepi.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2196	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:2196

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\Local\44\Process.txt

Filesize
743B

MD5
22dcac4eca1ee824acc2ef1ade48bbe1

SHA1
62ed46092a23ee04bd0a7e470cfc04f65bb271a3

SHA256
4f310e52c391e72905b9c605e7fef8d6b1296741b667e3c58920e670a3d02f70

SHA512
9799b02537087e61d28052795aa7a2155732e04f1d79b0f524e1dfed639188d9ca5b69711a5334875583e22f12abb402ead7c4e14944ebc081774e3322b34cf7

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

Filesize
1KB

MD5
eb5d1be57bed8e241888741766080250

SHA1
c65ef82db69bc0e711c9346e49a7c7c6d46c077d

SHA256
99c968b3b9521e38d148eff8507eb4f2e8d9fe51e96ba5bb7ce239208f2af515

SHA512
69985b66797f203ef7c9c3014d8681053c504dfcdc345edb4604e7cf4a25299bbe50afe61fc0543eeb7c18fa3684a0b5d1617b77ef22a5d0858d2f105aefd2c6

Download Submit
memory/2196-0-0x0000021F086F0000-0x0000021F0873A000-memory.dmp

Filesize
296KB

Download
memory/2196-12-0x00007FF8835B0000-0x00007FF883F9C000-memory.dmp

Filesize
9.9MB

Download
memory/2196-20-0x0000021F22CF0000-0x0000021F22D00000-memory.dmp

Filesize
64KB

Download
memory/2196-98-0x00007FF8835B0000-0x00007FF883F9C000-memory.dmp

Filesize
9.9MB

Download