d7782e08a3b44b4ef4610f7833c96b1df8f67de10cf2cb09d55b7685751a898f

General

Target

d7782e08a3b44b4ef4610f7833c96b1df8f67de10cf2cb09d55b7685751a898f.exe
Size

2.1MB
MD5

71d88d948dbbdef44e4cdc018dbfdfaa
SHA1

66d413da43d8328b37251bda200e57f93287f9f8
SHA256

d7782e08a3b44b4ef4610f7833c96b1df8f67de10cf2cb09d55b7685751a898f
SHA512

0ae41e50b8f45504b57967295e1637d08570203286f59b86ff6ea54686dc5ec50765a5005b0bd35701e6a3ab8cf836582aef7f74868232161509983de84f1419

Score

9^/10

evasion

Malware Config

Signatures

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

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

Pub1.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ Pub1.exe
Executes dropped EXE 1 IoCs

Processes:

Pub1.exe

pid process

4320 Pub1.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	Pub1.exe

pid	process
4320	Pub1.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:

Pub1.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Pub1.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Pub1.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs
Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

Pub1.exe

description ioc process

Key opened \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Wine Pub1.exe
Loads dropped DLL 1 IoCs

Processes:

d7782e08a3b44b4ef4610f7833c96b1df8f67de10cf2cb09d55b7685751a898f.exe

pid process

3188 d7782e08a3b44b4ef4610f7833c96b1df8f67de10cf2cb09d55b7685751a898f.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

Pub1.exe

pid process

4320 Pub1.exe
Drops file in Program Files directory 1 IoCs

Processes:

d7782e08a3b44b4ef4610f7833c96b1df8f67de10cf2cb09d55b7685751a898f.exe

description ioc process

File created C:\Program Files (x86)\Cess\Pub1.exe d7782e08a3b44b4ef4610f7833c96b1df8f67de10cf2cb09d55b7685751a898f.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

Pub1.exe

pid process

4320 Pub1.exe
4320 Pub1.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Wine	Pub1.exe

pid	process
3188	d7782e08a3b44b4ef4610f7833c96b1df8f67de10cf2cb09d55b7685751a898f.exe

pid	process
4320	Pub1.exe

description	ioc	process
File created	C:\Program Files (x86)\Cess\Pub1.exe	d7782e08a3b44b4ef4610f7833c96b1df8f67de10cf2cb09d55b7685751a898f.exe

pid	process
4320	Pub1.exe
4320	Pub1.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

d7782e08a3b44b4ef4610f7833c96b1df8f67de10cf2cb09d55b7685751a898f.exe

description	pid	process	target process
PID 3188 wrote to memory of 4320	3188	d7782e08a3b44b4ef4610f7833c96b1df8f67de10cf2cb09d55b7685751a898f.exe	Pub1.exe
PID 3188 wrote to memory of 4320	3188	d7782e08a3b44b4ef4610f7833c96b1df8f67de10cf2cb09d55b7685751a898f.exe	Pub1.exe
PID 3188 wrote to memory of 4320	3188	d7782e08a3b44b4ef4610f7833c96b1df8f67de10cf2cb09d55b7685751a898f.exe	Pub1.exe

C:\Users\Admin\AppData\Local\Temp\d7782e08a3b44b4ef4610f7833c96b1df8f67de10cf2cb09d55b7685751a898f.exe
"C:\Users\Admin\AppData\Local\Temp\d7782e08a3b44b4ef4610f7833c96b1df8f67de10cf2cb09d55b7685751a898f.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:3188

C:\Program Files (x86)\Cess\Pub1.exe
"C:\Program Files (x86)\Cess\Pub1.exe"
2⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Executes dropped EXE
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
PID:4320

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Query Registry

3

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1

T1102

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Cess\Pub1.exe
Filesize
2.2MB

MD5
9cf1213de4557dfe29bce1c7f597afa2

SHA1
86f6898cd6561be8f499e375c78920f7f39d61ee

SHA256
0dae26cde7e6fe48ee85c4ac2b70965bf1492524825326fba7acf2b11c452c39

SHA512
31c173f013f723c642041b1ecd22a5109ca05495d5d6adfc1f7e3d9297ad9739488ac711acb9a5bb28b3dd7a29ab8916ffa9c160bdef8fc8e452950857b8d0df

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsn5DA6.tmp\UAC.dll
Filesize
14KB

MD5
adb29e6b186daa765dc750128649b63d

SHA1
160cbdc4cb0ac2c142d361df138c537aa7e708c9

SHA256
2f7f8fc05dc4fd0d5cda501b47e4433357e887bbfed7292c028d99c73b52dc08

SHA512
b28adcccf0c33660fecd6f95f28f11f793dc9988582187617b4c113fb4e6fdad4cf7694cd8c0300a477e63536456894d119741a940dda09b7df3ff0087a7eada

Download Submit
memory/4320-131-0x0000000000000000-mapping.dmp

Download
memory/4320-133-0x0000000000400000-0x000000000095D000-memory.dmp

Filesize
5.4MB

Download
memory/4320-134-0x0000000000400000-0x000000000095D000-memory.dmp

Filesize
5.4MB

Download
memory/4320-135-0x00000000770A0000-0x0000000077243000-memory.dmp

Filesize
1.6MB

Download
memory/4320-136-0x0000000000400000-0x000000000095D000-memory.dmp

Filesize
5.4MB

Download
memory/4320-137-0x00000000770A0000-0x0000000077243000-memory.dmp

Filesize
1.6MB

Download
memory/4320-138-0x0000000000400000-0x000000000095D000-memory.dmp

Filesize
5.4MB

Download

Analysis

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