1b3da7f55427827f44cafce5301508fb6e2806c387e5044479778c8dde87624a

General

Target

wdfvbn.exe
Size

289.4MB
MD5

566135e9a517a204c2e8fb2f7332ecdc
SHA1

4cde0ea64922233cafe2eba489a79d67222e2022
SHA256

1b3da7f55427827f44cafce5301508fb6e2806c387e5044479778c8dde87624a
SHA512

9caf700b65d48617e6df09f2754a212c0c90908695b9be0aa33c2e7640e0529d20a91b51eab6dd3a775a51b63f281dfd358afe271b1781cf16165bc24cb1bdfe

Score

8^/10

upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

wdfvbn.exe

pid process

656 wdfvbn.exe

pid	process
656	wdfvbn.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/4040-133-0x0000000000A00000-0x0000000000DE4000-memory.dmp	upx
behavioral2/memory/4040-134-0x0000000000A00000-0x0000000000DE4000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Suspicious use of SetThreadContext 1 IoCs

Processes:

wdfvbn.exe

description pid process target process

PID 3856 set thread context of 4040 3856 wdfvbn.exe vbc.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3692 4040 WerFault.exe vbc.exe
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

2652 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

wdfvbn.exewdfvbn.exe

description pid process

Token: SeDebugPrivilege 3856 wdfvbn.exe
Token: SeDebugPrivilege 656 wdfvbn.exe

description	pid	process	target process
PID 3856 set thread context of 4040	3856	wdfvbn.exe	vbc.exe

pid	pid_target	process	target process
3692	4040	WerFault.exe	vbc.exe

pid	process
2652	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	3856	wdfvbn.exe
Token: SeDebugPrivilege	656	wdfvbn.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

wdfvbn.execmd.exewdfvbn.exe

description	pid	process	target process
PID 3856 wrote to memory of 4040	3856	wdfvbn.exe	vbc.exe
PID 3856 wrote to memory of 4040	3856	wdfvbn.exe	vbc.exe
PID 3856 wrote to memory of 4040	3856	wdfvbn.exe	vbc.exe
PID 3856 wrote to memory of 4040	3856	wdfvbn.exe	vbc.exe
PID 3856 wrote to memory of 4040	3856	wdfvbn.exe	vbc.exe
PID 3856 wrote to memory of 4040	3856	wdfvbn.exe	vbc.exe
PID 3856 wrote to memory of 4040	3856	wdfvbn.exe	vbc.exe
PID 3856 wrote to memory of 2376	3856	wdfvbn.exe	cmd.exe
PID 3856 wrote to memory of 2376	3856	wdfvbn.exe	cmd.exe
PID 3856 wrote to memory of 2376	3856	wdfvbn.exe	cmd.exe
PID 3856 wrote to memory of 3492	3856	wdfvbn.exe	cmd.exe
PID 3856 wrote to memory of 3492	3856	wdfvbn.exe	cmd.exe
PID 3856 wrote to memory of 3492	3856	wdfvbn.exe	cmd.exe
PID 3856 wrote to memory of 4784	3856	wdfvbn.exe	cmd.exe
PID 3856 wrote to memory of 4784	3856	wdfvbn.exe	cmd.exe
PID 3856 wrote to memory of 4784	3856	wdfvbn.exe	cmd.exe
PID 3492 wrote to memory of 2652	3492	cmd.exe	schtasks.exe
PID 3492 wrote to memory of 2652	3492	cmd.exe	schtasks.exe
PID 3492 wrote to memory of 2652	3492	cmd.exe	schtasks.exe
PID 656 wrote to memory of 2044	656	wdfvbn.exe	vbc.exe
PID 656 wrote to memory of 2044	656	wdfvbn.exe	vbc.exe
PID 656 wrote to memory of 2044	656	wdfvbn.exe	vbc.exe
PID 656 wrote to memory of 2044	656	wdfvbn.exe	vbc.exe
PID 656 wrote to memory of 2044	656	wdfvbn.exe	vbc.exe
PID 656 wrote to memory of 2044	656	wdfvbn.exe	vbc.exe
PID 656 wrote to memory of 2044	656	wdfvbn.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\wdfvbn.exe
"C:\Users\Admin\AppData\Local\Temp\wdfvbn.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3856
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  PID:4040
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4040 -s 188
    3⤵
    - Program crash
    PID:3692
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\wdfvbn"
  2⤵
  PID:2376
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\wdfvbn\wdfvbn.exe'" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3492
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\wdfvbn\wdfvbn.exe'" /f
    3⤵
    - Creates scheduled task(s)
    PID:2652
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c copy "C:\Users\Admin\AppData\Local\Temp\wdfvbn.exe" "C:\Users\Admin\AppData\Roaming\wdfvbn\wdfvbn.exe"
  2⤵
  PID:4784

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4040 -ip 4040
1⤵
PID:5044

C:\Users\Admin\AppData\Roaming\wdfvbn\wdfvbn.exe
C:\Users\Admin\AppData\Roaming\wdfvbn\wdfvbn.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:656
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  PID:2044

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

Scripting

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\wdfvbn.exe.log

Filesize
425B

MD5
4eaca4566b22b01cd3bc115b9b0b2196

SHA1
e743e0792c19f71740416e7b3c061d9f1336bf94

SHA256
34ba0ab8d1850e7825763f413142a333ccbc05fa2b5499a28a7d27b8a1c5b4bb

SHA512
bc2b1bf45203e3bb3009a7d37617b8f0f7ffa613680b32de2b963e39d2cf1650614d7035a0cf78f35a4f5cb17a2a439e2e07deaefd2a4275a62efd0a5c0184a1

Download Submit
C:\Users\Admin\AppData\Roaming\wdfvbn\wdfvbn.exe

Filesize
289.4MB

MD5
566135e9a517a204c2e8fb2f7332ecdc

SHA1
4cde0ea64922233cafe2eba489a79d67222e2022

SHA256
1b3da7f55427827f44cafce5301508fb6e2806c387e5044479778c8dde87624a

SHA512
9caf700b65d48617e6df09f2754a212c0c90908695b9be0aa33c2e7640e0529d20a91b51eab6dd3a775a51b63f281dfd358afe271b1781cf16165bc24cb1bdfe

Download Submit
C:\Users\Admin\AppData\Roaming\wdfvbn\wdfvbn.exe

Filesize
289.4MB

MD5
566135e9a517a204c2e8fb2f7332ecdc

SHA1
4cde0ea64922233cafe2eba489a79d67222e2022

SHA256
1b3da7f55427827f44cafce5301508fb6e2806c387e5044479778c8dde87624a

SHA512
9caf700b65d48617e6df09f2754a212c0c90908695b9be0aa33c2e7640e0529d20a91b51eab6dd3a775a51b63f281dfd358afe271b1781cf16165bc24cb1bdfe

Download Submit
memory/656-142-0x0000000000890000-0x0000000000A52000-memory.dmp

Filesize
1.8MB

Download
memory/2044-143-0x0000000000000000-mapping.dmp

Download
memory/2376-135-0x0000000000000000-mapping.dmp

Download
memory/2652-138-0x0000000000000000-mapping.dmp

Download
memory/3492-136-0x0000000000000000-mapping.dmp

Download
memory/3856-130-0x00000000004F0000-0x00000000006B2000-memory.dmp

Filesize
1.8MB

Download
memory/4040-134-0x0000000000A00000-0x0000000000DE4000-memory.dmp

Filesize
3.9MB

Download
memory/4040-133-0x0000000000A00000-0x0000000000DE4000-memory.dmp

Filesize
3.9MB

Download
memory/4040-131-0x0000000000000000-mapping.dmp

Download
memory/4784-137-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads