remcos | c284436ac848ee2ff093e35b1b1a3b75e137adff13c2d3cb070192cd3851bfcd

Resubmissions

24-11-2024 05:19

241124-fz37jssjhr 10

24-11-2024 05:13

241124-fwxklawje1 10

Analysis

max time kernel
41s
max time network
22s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
24-11-2024 05:13

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Report Analysis Logs

General

Target

bo.exe
Size

19.4MB
MD5

d11df1a50d4bd2946f22579a59c42533
SHA1

642658e79c5efcfdf1ece6b24f677868e2e5242b
SHA256

c284436ac848ee2ff093e35b1b1a3b75e137adff13c2d3cb070192cd3851bfcd
SHA512

0dbe240d77a2e51198e942f0b48dc92f2d3c40f7eac98f957ede80f5809d4efff24a62f7f10e826b70b1459842391a880c39ab651b53809d4a0451778a04fb66
SSDEEP

393216:V7HMp6xoUGEbCqiYXygxbisWLvhVARbpQgz+exD9ydNwbOVJs:VzMUWUxCD2nZi9vhVAx1+UDAvwbOw

Score

10^/10

remcos evasion rat themida trojan

Malware Config

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

Processes:

bo.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	bo.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

bo.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	bo.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	bo.exe

Themida packer 14 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral1/memory/1880-0-0x000000013F140000-0x00000001412BA000-memory.dmp	themida
behavioral1/memory/1880-2-0x000000013F140000-0x00000001412BA000-memory.dmp	themida
behavioral1/memory/1880-3-0x000000013F140000-0x00000001412BA000-memory.dmp	themida
behavioral1/memory/1880-5-0x000000013F140000-0x00000001412BA000-memory.dmp	themida
behavioral1/memory/1880-7-0x000000013F140000-0x00000001412BA000-memory.dmp	themida
behavioral1/memory/1880-6-0x000000013F140000-0x00000001412BA000-memory.dmp	themida
behavioral1/memory/1880-4-0x000000013F140000-0x00000001412BA000-memory.dmp	themida
behavioral1/memory/1880-9-0x000000013F140000-0x00000001412BA000-memory.dmp	themida
behavioral1/memory/1880-8-0x000000013F140000-0x00000001412BA000-memory.dmp	themida
behavioral1/memory/1880-10-0x000000013F140000-0x00000001412BA000-memory.dmp	themida
behavioral1/memory/1880-11-0x000000013F140000-0x00000001412BA000-memory.dmp	themida
behavioral1/memory/1880-13-0x000000013F140000-0x00000001412BA000-memory.dmp	themida
behavioral1/memory/1880-14-0x000000013F140000-0x00000001412BA000-memory.dmp	themida
behavioral1/memory/1880-15-0x000000013F140000-0x00000001412BA000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

bo.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	bo.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

bo.exe

pid	Process
1880	bo.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

bo.exe

description	pid	Process	procid_target
PID 1880 wrote to memory of 2712	1880	bo.exe	33
PID 1880 wrote to memory of 2712	1880	bo.exe	33
PID 1880 wrote to memory of 2712	1880	bo.exe	33

C:\Users\Admin\AppData\Local\Temp\bo.exe
"C:\Users\Admin\AppData\Local\Temp\bo.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:1880
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c exit
  2⤵
  PID:2712

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1880-0-0x000000013F140000-0x00000001412BA000-memory.dmp

Filesize
33.5MB

Download
memory/1880-1-0x00000000778A0000-0x00000000778A2000-memory.dmp

Filesize
8KB

Download
memory/1880-2-0x000000013F140000-0x00000001412BA000-memory.dmp

Filesize
33.5MB

Download
memory/1880-3-0x000000013F140000-0x00000001412BA000-memory.dmp

Filesize
33.5MB

Download
memory/1880-5-0x000000013F140000-0x00000001412BA000-memory.dmp

Filesize
33.5MB

Download
memory/1880-7-0x000000013F140000-0x00000001412BA000-memory.dmp

Filesize
33.5MB

Download
memory/1880-6-0x000000013F140000-0x00000001412BA000-memory.dmp

Filesize
33.5MB

Download
memory/1880-4-0x000000013F140000-0x00000001412BA000-memory.dmp

Filesize
33.5MB

Download
memory/1880-9-0x000000013F140000-0x00000001412BA000-memory.dmp

Filesize
33.5MB

Download
memory/1880-8-0x000000013F140000-0x00000001412BA000-memory.dmp

Filesize
33.5MB

Download
memory/1880-10-0x000000013F140000-0x00000001412BA000-memory.dmp

Filesize
33.5MB

Download
memory/1880-11-0x000000013F140000-0x00000001412BA000-memory.dmp

Filesize
33.5MB

Download
memory/1880-13-0x000000013F140000-0x00000001412BA000-memory.dmp

Filesize
33.5MB

Download
memory/1880-14-0x000000013F140000-0x00000001412BA000-memory.dmp

Filesize
33.5MB

Download
memory/1880-15-0x000000013F140000-0x00000001412BA000-memory.dmp

Filesize
33.5MB

Download