d5daf1b01edc6e88121fa81c5374bf5b8d86ac67ba9d18d0babedcdb774e89e8

Analysis

max time kernel
24s
max time network
113s
platform
windows10_x64
resource
win10v20201028
submitted
09/11/2020, 20:16

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General

Target
dropfile.exe
Size 1.7MB
Sample201109-9vcc54ftxe
SHA256 d5daf1b01edc6e88121fa81c5374bf5b8d86ac67ba9d18d0babedcdb774e89e8
MD5 be4ccf128272f9317522ad457863f51a
SHA1 5ee1215091000cf81f653593d67912111376d8aa
SHA512 ab9d0929822b9ca6ffcbe3a3764fcfb38c3f88dc7db89537364d6f47829a07d012fb6d2532a808ebd6c60cc56c37948344fa537a16f6ccde440df141a34c72d1
MD5 SHA1 SHA512

Score

10^/10

evasion trojan

Malware Config

Signatures

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 2752 created 980	2752	WerFault.exe	67

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

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	dropfile.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	dropfile.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	dropfile.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
980	dropfile.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2752	980	WerFault.exe	67

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
2752	WerFault.exe
2752	WerFault.exe
2752	WerFault.exe
2752	WerFault.exe
2752	WerFault.exe
2752	WerFault.exe
2752	WerFault.exe
2752	WerFault.exe
2752	WerFault.exe
2752	WerFault.exe
2752	WerFault.exe
2752	WerFault.exe
2752	WerFault.exe
2752	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	2752	WerFault.exe
Token: SeBackupPrivilege	2752	WerFault.exe
Token: SeDebugPrivilege	2752	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\dropfile.exe
"C:\Users\Admin\AppData\Local\Temp\dropfile.exe"
1⤵
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:980
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 980 -s 796
  2⤵
  - Suspicious use of NtCreateProcessExOtherParentProcess
  - Program crash
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2752

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/980-0-0x0000000000EE0000-0x0000000001563000-memory.dmp

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memory/2752-1-0x00000000042F0000-0x00000000042F1000-memory.dmp

Download

memory/2752-2-0x00000000042F0000-0x00000000042F1000-memory.dmp

Download

memory/2752-4-0x0000000004B20000-0x0000000004B21000-memory.dmp

Download