colibri | a3d5c655cfd386f82cae077d2db8b8c5c64eb560260eca223442f678635349f0

Analysis

max time kernel
105s
max time network
109s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
09-02-2023 04:17

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General

Target

file.exe
Size

2.7MB
MD5

a98cf7d9ef915f3c3cb16d731eb43ff9
SHA1

51110199aae9e5546a8b6e29e62a0a629ab29618
SHA256

a3d5c655cfd386f82cae077d2db8b8c5c64eb560260eca223442f678635349f0
SHA512

2ad5bf1357ac2a89c78b5f7066b759924cb78a90c5643f93b05c1c0d59b8dc0b860549cfd5fbff3ef65c0c7068c2b64cea425db74afe57071c5245773b881dc8
SSDEEP

6144:phdPbOhpdUK5rvyKMdF2Xzw4JttcBDlxdwpfxfBThM9eo1I7u0Kry2wej993RUgV:3tbO5WKeg5fBTy9eo1drf

Score

10^/10

colibri exploits loader

Malware Config

Extracted

Family

colibri

Version

1.4.0

Botnet

exploits

http://194.4.49.243/gate.php

rc4.plain

Signatures

Colibri Loader
A loader sold as MaaS first seen in August 2021.
loader colibri
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Suspicious use of SetThreadContext 1 IoCs

Processes:

file.exe

description pid process target process

PID 1116 set thread context of 888 1116 file.exe vbc.exe

description	pid	process	target process
PID 1116 set thread context of 888	1116	file.exe	vbc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

file.exe

description	pid	process	target process
PID 1116 wrote to memory of 888	1116	file.exe	vbc.exe
PID 1116 wrote to memory of 888	1116	file.exe	vbc.exe
PID 1116 wrote to memory of 888	1116	file.exe	vbc.exe
PID 1116 wrote to memory of 888	1116	file.exe	vbc.exe
PID 1116 wrote to memory of 888	1116	file.exe	vbc.exe
PID 1116 wrote to memory of 888	1116	file.exe	vbc.exe
PID 1116 wrote to memory of 888	1116	file.exe	vbc.exe
PID 1116 wrote to memory of 888	1116	file.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1116

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
2⤵
PID:888

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

T1064

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/888-60-0x0000000000404E13-mapping.dmp

Download
memory/888-61-0x0000000076961000-0x0000000076963000-memory.dmp

Filesize
8KB

Download
memory/888-59-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download
memory/888-58-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download
memory/888-56-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download
memory/888-55-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download
memory/888-62-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download
memory/888-63-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download
memory/1116-54-0x00000000003C0000-0x000000000043C000-memory.dmp

Filesize
496KB

Download