blacknet | 6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c

General

Target

6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c.exe
Size

107KB
MD5

34462cc235a225cfea64571cbe5f1f9a
SHA1

bf83863f8501f4d7fb60306cef10f878f99c3341
SHA256

6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c
SHA512

6668072aaf81198f86a62fa6cf5756c98d5d100e0f17171bb56cc7f00c0e917386bcb92bdd6d6c68a406deb0d7c1a809064a2e517b3a4bf625652495fb9a3836

Score

10^/10

blacknet macroexploit persistence trojan

Malware Config

Extracted

Family

blacknet

Botnet

MAcroExploit

C2

qcRLY15MytEH8zzltUEUXqMWcrfsJpvwf9Q847/pEPjQw/wKO/3cbdqjE/N5HkfOnvMDzlfeLP49xZyrrYQc01IRmoUWcIuDFK+Uw41r3IbCQ4S68d9CG+JSQHBD1u/k+VYdqmpcn/Rdz6DJKRufFJeoOGnvi4I0y/dk3Q3oOZ0QjPa8Br3g34putZYLkW+7vlPCz9v0kqlE8wekEHL+y0+LYms4Ik8+dRp/9egEXzTy6NrW+JDx3yNvWUBcX8wXIK8PSzZMloJPQU6QDAQY1ZAJWOdpfuL8TSXH9AKWDlFNI311m2sFcvYtKEnt6uCaHvY/R79HlfoffaozQAlYaQ==

Mutex

BN[LCsHRzym-8457373]

Attributes

antivm
true
elevate_uac
false
install_name
WindowsUpdate.exe
splitter
|BN|
start_name
24d7d2c2d063440d72f07787304f20b9
startup
true
usb_spread
true

Signatures

BlackNET
BlackNET is an open source remote access tool written in VB.NET.
trojan blacknet

BlackNET Payload 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe	family_blacknet
C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe	family_blacknet

Executes dropped EXE 2 IoCs

Processes:

svshost.exeWindowsUpdate.exe

pid process

1948 svshost.exe
2036 WindowsUpdate.exe

pid	process
1948	svshost.exe
2036	WindowsUpdate.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

Processes:

6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c.exesvshost.exeWindowsUpdate.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\24d7d2c2d063440d72f07787304f20b9 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c.exe"	6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\24d7d2c2d063440d72f07787304f20b9 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Microsoft\\MyClient\\WindowsUpdate.exe"	6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\AdobeUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\svshost.exe"	svshost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\24d7d2c2d063440d72f07787304f20b9 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Microsoft\\MyClient\\WindowsUpdate.exe"	WindowsUpdate.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 23 IoCs

Processes:

WindowsUpdate.exe

pid	process
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe
2036	WindowsUpdate.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WindowsUpdate.exe

description pid process

Token: SeDebugPrivilege 2036 WindowsUpdate.exe

description	pid	process
Token: SeDebugPrivilege	2036	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c.exe

description	pid	process	target process
PID 2160 wrote to memory of 1948	2160	6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c.exe	svshost.exe
PID 2160 wrote to memory of 1948	2160	6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c.exe	svshost.exe
PID 2160 wrote to memory of 2036	2160	6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c.exe	WindowsUpdate.exe
PID 2160 wrote to memory of 2036	2160	6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c.exe	WindowsUpdate.exe

C:\Users\Admin\AppData\Local\Temp\6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c.exe
"C:\Users\Admin\AppData\Local\Temp\6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2160

C:\Users\Admin\AppData\Local\Temp\svshost.exe
"C:\Users\Admin\AppData\Local\Temp\svshost.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
PID:1948

C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
"C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2036

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
Filesize
107KB

MD5
34462cc235a225cfea64571cbe5f1f9a

SHA1
bf83863f8501f4d7fb60306cef10f878f99c3341

SHA256
6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c

SHA512
6668072aaf81198f86a62fa6cf5756c98d5d100e0f17171bb56cc7f00c0e917386bcb92bdd6d6c68a406deb0d7c1a809064a2e517b3a4bf625652495fb9a3836

Download Submit
C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
Filesize
107KB

MD5
34462cc235a225cfea64571cbe5f1f9a

SHA1
bf83863f8501f4d7fb60306cef10f878f99c3341

SHA256
6af3997fbc219d7107ed501e7c1bec7e2e5fde3a8e10b4de4525921dad70a13c

SHA512
6668072aaf81198f86a62fa6cf5756c98d5d100e0f17171bb56cc7f00c0e917386bcb92bdd6d6c68a406deb0d7c1a809064a2e517b3a4bf625652495fb9a3836

Download Submit
C:\Users\Admin\AppData\Local\Temp\svshost.exe
Filesize
10KB

MD5
74799c22938cc4758d06aad116fff0fb

SHA1
24f517d9a666adacc88a1c0c7b9db39743f573a4

SHA256
eff5f5ea6e6f96b3391dc8b8b8bd3651f3e38b9a5907e985b3704bc06df559c2

SHA512
f850f5e03ead19fc4e318cc14c96e6bd0198b0f2b467304da00b627cd838240d6790f466edd4aaf18767c7ff0c2a7cb881ae1f55fd487f5b2d1d1e2e100affee

Download Submit
C:\Users\Admin\AppData\Local\Temp\svshost.exe
Filesize
10KB

MD5
74799c22938cc4758d06aad116fff0fb

SHA1
24f517d9a666adacc88a1c0c7b9db39743f573a4

SHA256
eff5f5ea6e6f96b3391dc8b8b8bd3651f3e38b9a5907e985b3704bc06df559c2

SHA512
f850f5e03ead19fc4e318cc14c96e6bd0198b0f2b467304da00b627cd838240d6790f466edd4aaf18767c7ff0c2a7cb881ae1f55fd487f5b2d1d1e2e100affee

Download Submit
memory/1948-130-0x0000000000000000-mapping.dmp

Download
memory/1948-133-0x0000000000180000-0x0000000000188000-memory.dmp

Filesize
32KB

Download
memory/1948-137-0x00007FFC6D6C0000-0x00007FFC6E181000-memory.dmp

Filesize
10.8MB

Download
memory/2036-134-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads