44caliber | c7ad74775251731d6ffc24878658341b5a3b3398a5480ab113f80af42eda32c3

General

Target

ac8be183acf3079cd5475f8c170a98ae.exe
Size

2.9MB
MD5

ac8be183acf3079cd5475f8c170a98ae
SHA1

4eab4aba5e2888496a267f2e755c5fbd29a5c25d
SHA256

c7ad74775251731d6ffc24878658341b5a3b3398a5480ab113f80af42eda32c3
SHA512

d3c80ff0ee04ecf898a0951433bf4e1dba25a214f4b1d902bc8e0a79a1b08bacc6813cd30c40a7a3f6cd10312b49850475f61f2f33886ad2797f25c37cfa54f3

Score

10^/10

44caliber orcus old rat spyware stealer

Malware Config

Extracted

Family

orcus

Botnet

old

C2

tools.3utilities.com:17650

Mutex

3e72d23ec7f64b6aab470ad129f9a745

Attributes

autostart_method
TaskScheduler
enable_keylogger
false
install_path
%programfiles%\vcredist\vcredistapp.exe
reconnect_delay
10000
registry_keyname
vcredistappreg
taskscheduler_taskname
vcredistappsch
watchdog_path
Temp\vcredistapp.exe

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/959366883545579581/Z1Be8qUrtXUbCZydkDEnV1VMcMYEDqpAE1fFmNhN26L5vd4nrcJOGi-iQnD-msZc-BJX

Signatures

44Caliber
An open source infostealer written in C#.
stealer 44caliber
Orcus
Orcus is a Remote Access Trojan that is being sold on underground forums.
rat spyware stealer orcus

Orcurs Rat Executable 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1528-54-0x0000000000A50000-0x0000000000D44000-memory.dmp	orcus

Executes dropped EXE 1 IoCs

Processes:

libchrome.exe

pid process

1152 libchrome.exe
Loads dropped DLL 1 IoCs

Processes:

ac8be183acf3079cd5475f8c170a98ae.exe

pid process

1528 ac8be183acf3079cd5475f8c170a98ae.exe
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
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
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
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

129 freegeoip.app
130 freegeoip.app
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
1152	libchrome.exe

pid	process
1528	ac8be183acf3079cd5475f8c170a98ae.exe

flow	ioc
129	freegeoip.app
130	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:

libchrome.exe

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

libchrome.exe

pid process

1152 libchrome.exe
1152 libchrome.exe
1152 libchrome.exe
1152 libchrome.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

ac8be183acf3079cd5475f8c170a98ae.exelibchrome.exe

description pid process

Token: SeDebugPrivilege 1528 ac8be183acf3079cd5475f8c170a98ae.exe
Token: SeDebugPrivilege 1152 libchrome.exe

pid	process
1152	libchrome.exe
1152	libchrome.exe
1152	libchrome.exe
1152	libchrome.exe

description	pid	process
Token: SeDebugPrivilege	1528	ac8be183acf3079cd5475f8c170a98ae.exe
Token: SeDebugPrivilege	1152	libchrome.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

ac8be183acf3079cd5475f8c170a98ae.exe

description	pid	process	target process
PID 1528 wrote to memory of 1152	1528	ac8be183acf3079cd5475f8c170a98ae.exe	libchrome.exe
PID 1528 wrote to memory of 1152	1528	ac8be183acf3079cd5475f8c170a98ae.exe	libchrome.exe
PID 1528 wrote to memory of 1152	1528	ac8be183acf3079cd5475f8c170a98ae.exe	libchrome.exe
PID 1528 wrote to memory of 1152	1528	ac8be183acf3079cd5475f8c170a98ae.exe	libchrome.exe

C:\Users\Admin\AppData\Local\Temp\ac8be183acf3079cd5475f8c170a98ae.exe
"C:\Users\Admin\AppData\Local\Temp\ac8be183acf3079cd5475f8c170a98ae.exe"
1⤵
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1528
- C:\Users\Admin\AppData\Local\Temp\libchrome.exe
  "C:\Users\Admin\AppData\Local\Temp\libchrome.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1152

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

3

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\libchrome.exe

Filesize
274KB

MD5
f0a6137751223c932f77f1807ad0805e

SHA1
af5befc8e36c8c062ef96ad57e8e1a1f39a2f675

SHA256
2105779b2f3e3f454cea059d25484b9ef423a0318abc7c8cbe04289e393e8697

SHA512
c4096757420b11bc3748522202efb0d8ee1ecd09e7b773505a96124a339e40951533432d02dfbc929380f8a15160ed2911018dee56b2af7db4d6d9222e4dee4a

Download Submit
C:\Users\Admin\AppData\Local\Temp\libchrome.exe

Filesize
274KB

MD5
f0a6137751223c932f77f1807ad0805e

SHA1
af5befc8e36c8c062ef96ad57e8e1a1f39a2f675

SHA256
2105779b2f3e3f454cea059d25484b9ef423a0318abc7c8cbe04289e393e8697

SHA512
c4096757420b11bc3748522202efb0d8ee1ecd09e7b773505a96124a339e40951533432d02dfbc929380f8a15160ed2911018dee56b2af7db4d6d9222e4dee4a

Download Submit
\Users\Admin\AppData\Local\Temp\libchrome.exe

Filesize
274KB

MD5
f0a6137751223c932f77f1807ad0805e

SHA1
af5befc8e36c8c062ef96ad57e8e1a1f39a2f675

SHA256
2105779b2f3e3f454cea059d25484b9ef423a0318abc7c8cbe04289e393e8697

SHA512
c4096757420b11bc3748522202efb0d8ee1ecd09e7b773505a96124a339e40951533432d02dfbc929380f8a15160ed2911018dee56b2af7db4d6d9222e4dee4a

Download Submit
memory/1152-61-0x0000000000000000-mapping.dmp

Download
memory/1152-64-0x0000000000B40000-0x0000000000B8A000-memory.dmp

Filesize
296KB

Download
memory/1152-65-0x000000001B170000-0x000000001B172000-memory.dmp

Filesize
8KB

Download
memory/1528-54-0x0000000000A50000-0x0000000000D44000-memory.dmp

Filesize
3.0MB

Download
memory/1528-55-0x00000000004C0000-0x00000000004CE000-memory.dmp

Filesize
56KB

Download
memory/1528-56-0x0000000004640000-0x000000000469C000-memory.dmp

Filesize
368KB

Download
memory/1528-57-0x0000000002270000-0x0000000002282000-memory.dmp

Filesize
72KB

Download
memory/1528-58-0x0000000004450000-0x0000000004468000-memory.dmp

Filesize
96KB

Download
memory/1528-59-0x0000000004490000-0x00000000044A0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads