cobaltstrike | bf2a11710eb16103afbcb200979c9a6de040a9b6d5e77bde5d6a93b5837aa6f1

Analysis

max time kernel
5s
max time network
0s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
10/09/2024, 08:07

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General

Target

start_yara.exe
Size

4.6MB
MD5

90bacba6d4a481397d3a759f06bf7271
SHA1

bf0c904a0d72981e51ff575272203c03c8e3327a
SHA256

bf2a11710eb16103afbcb200979c9a6de040a9b6d5e77bde5d6a93b5837aa6f1
SHA512

a6582bf8132cd1c3aba5a345e1fb79c255f187b6e68d7ea0dc0c34bd8596ac1462cf97beb5716ef5fd85f09436e61b1c2b03f690f9e7198d8666a3b03c9e4ad7
SSDEEP

98304:VllLJqs6/is/bhFAf5lx7pll23uog6rbre/Zs/z1rzN:VlusXs/bhC17HzD66xs/z1rB

Score

10^/10

cobaltstrike industroyer merlin netfilter netwire remcos snakekeylogger backdoor botnet discovery ics keylogger rat rootkit stealer trojan

Malware Config

Signatures

Cobalt Strike reflective loader 1 IoCs

Detects the reflective loader used by Cobalt Strike.

resource	yara_rule
behavioral1/files/0x0008000000015d9c-25.dat	cobalt_reflective_dll

Cobaltstrike
Detected malicious payload which is part of Cobaltstrike.
trojan backdoor cobaltstrike
Industroyer
Also known as CrashOverride. Malware framework which targets Industrial Control Systems (ICS) related to power transmission.
ics industroyer

Industroyer IEC-104 Module 1 IoCs

Contains strings related to Industroyer module used to communicate with power transmission grids over IEC-104 protocol.

resource	yara_rule
behavioral1/files/0x0008000000015d9c-25.dat	win_industroyer_w3

Merlin
Merlin is a cross-platform post-exploitation C2 framework written in golang.
backdoor merlin

Merlin payload 1 IoCs

resource	yara_rule
behavioral1/files/0x0008000000015d9c-25.dat	family_merlin

NetFilter
NetFilter is a rootkit first seen in June 2021.
rootkit netfilter

NetFilter payload 1 IoCs

resource	yara_rule
behavioral1/files/0x0008000000015d9c-25.dat	netfilter_payload

NetWire RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x0008000000015d9c-25.dat	netwire

Netwire
Netwire is a RAT with main functionalities focused password stealing and keylogging, but also includes remote control capabilities as well.
botnet stealer netwire
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
stealer keylogger snakekeylogger

Snake Keylogger payload 1 IoCs

resource	yara_rule
behavioral1/files/0x0008000000015d9c-25.dat	family_snakekeylogger

Executes dropped EXE 1 IoCs

pid	Process
2976	yara64.exe

Loads dropped DLL 1 IoCs

pid	Process
2420	cmd.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	start_yara.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AcroRd32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2720	AcroRd32.exe
2720	AcroRd32.exe
2720	AcroRd32.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1768 wrote to memory of 2420	1768	start_yara.exe	30
PID 1768 wrote to memory of 2420	1768	start_yara.exe	30
PID 1768 wrote to memory of 2420	1768	start_yara.exe	30
PID 1768 wrote to memory of 2420	1768	start_yara.exe	30
PID 2420 wrote to memory of 2976	2420	cmd.exe	32
PID 2420 wrote to memory of 2976	2420	cmd.exe	32
PID 2420 wrote to memory of 2976	2420	cmd.exe	32
PID 2420 wrote to memory of 2976	2420	cmd.exe	32

C:\Users\Admin\AppData\Local\Temp\start_yara.exe
"C:\Users\Admin\AppData\Local\Temp\start_yara.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1768
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\yara_check\start.bat" "
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2420
- - C:\yara_check\yara64.exe
    yara64.exe -r yara-rules-full.yar c:\
    3⤵
    - Executes dropped EXE
    PID:2976

C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
"C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:2720

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\yara_check\start.bat

Filesize
64B

MD5
edc9d216ea519d018d09eeabd084e805

SHA1
eb3fe5524f4e72549d5bf3d9bbdfa38f60084a5e

SHA256
2468a503a7d41c4e932136218d5ce2d356aba91b92f1ba60c59a81a6b980cea1

SHA512
62e3c92ae597c13d910c35b2491928586baf6c43d13cddc2ee56ece88c2bcaa67bc447542e253ca6364195672d790f1aa0e752707ca533cfcd54d3d36e79fcb3

Download Submit
C:\yara_check\yara-rules-full.yar

Filesize
15.2MB

MD5
2c74ae086ff861cbc3ca5099ff09f769

SHA1
794e255e57ec94f1a3763867f3c32690d5ceb701

SHA256
e3263b8999ceed377550c046caf0f28df1fbe1d6960f57645360da463c2b3bc8

SHA512
c7deb47b8f70be5b10f3d8b2491c0223be5538f76d344e560b8fb4b7dd202677ef21c27cbc382709f19f3dd8c98ccaa5ff9a7a5a6e6dda78c472d60f3dc1ff4b

Download Submit
\yara_check\yara64.exe

Filesize
2.3MB

MD5
4210345b1ef5eb0aac487b429aa4b03c

SHA1
1ee298d7f5410f40482dfb6b2fb4142ba19df1cf

SHA256
da87146a6b976035e7ef95efe89ae30ba272a09216a75b7938b846dfb894345c

SHA512
d0a785f879d3ac7ad3a23f775927c0736ed29c55d2bb8e24c1e40f2f1bc35c1726bfb0fbe5689eefc01d9bb81f49e3d6b5e86f7fd01c11b59fb15b01cf176d8a

Download Submit