plugx | 59821b8aabe5acc8b1eb91ed2de2cba91b05351c3d9e3bf52ba0ba786f359b87

Analysis

max time kernel
54s
max time network
130s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
22-03-2022 15:39

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General

Target

resources.bat
Size

297B
MD5

4f1e373b0722cbb9c21cc0ac8322ed74
SHA1

8049f6d60b0fc03ad792a13e634a661d1fc37af0
SHA256

1fd144713737510991caa7dbdf03451aee1edc80e7a99773b38ec1f0b436a4d8
SHA512

42b7710eaf3746a27dc7f4578ddebbc36adc075d4f68bb2fbddfdbf8c6d60018fe1d4246aa3a28becaec8990b9c9f51107c96321a526570c20e80351e22ed95d

Score

10^/10

plugx persistence trojan

Malware Config

Signatures

PlugX
PlugX is a RAT (Remote Access Trojan) that has been around since 2008.
trojan plugx

PlugX Rat Payload 2 IoCs

resource	yara_rule
behavioral20/files/0x000800000001e91b-134.dat	PlugX
behavioral20/files/0x000800000001e91b-135.dat	PlugX

Executes dropped EXE 1 IoCs

pid	Process
2232	Bloom.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	cmd.exe

Loads dropped DLL 3 IoCs

pid	Process
2232	Bloom.exe
2232	Bloom.exe
2232	Bloom.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Bloom = "C:\\Users\\Admin\\AppData\\Roaming\\Bloom\\Bloom.exe --zAZsKBNE"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1056 wrote to memory of 1576	1056	cmd.exe	79
PID 1056 wrote to memory of 1576	1056	cmd.exe	79
PID 1056 wrote to memory of 1796	1056	cmd.exe	80
PID 1056 wrote to memory of 1796	1056	cmd.exe	80
PID 1056 wrote to memory of 1952	1056	cmd.exe	81
PID 1056 wrote to memory of 1952	1056	cmd.exe	81
PID 1056 wrote to memory of 2232	1056	cmd.exe	82
PID 1056 wrote to memory of 2232	1056	cmd.exe	82

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\resources.bat"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1056
- C:\Windows\system32\tar.exe
  tar -xvf "app.zip" -C "C:\Users\Admin\AppData\Roaming"
  2⤵
  PID:1576
- C:\Windows\system32\reg.exe
  reg delete "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run" /v Bloom /f
  2⤵
  PID:1796
- C:\Windows\system32\reg.exe
  reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run" /v Bloom /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Bloom\Bloom.exe --zAZsKBNE" /f
  2⤵
  - Adds Run key to start application
  PID:1952
- C:\Users\Admin\AppData\Roaming\Bloom\Bloom.exe
  "C:\Users\Admin\AppData\Roaming\Bloom\Bloom.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  PID:2232

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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