6bd83bf1f9e735a3c7951f8f55f22cf31156063ad56bf80f94238fd02faf4ffc

Analysis

max time kernel
142s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25/12/2023, 01:08

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General

Target

1f4f390b42a7f516013d7db571b32115.exe
Size

724KB
MD5

1f4f390b42a7f516013d7db571b32115
SHA1

8dddb9ff68c0d1dbc62a782cae2d64c4eb18091c
SHA256

6bd83bf1f9e735a3c7951f8f55f22cf31156063ad56bf80f94238fd02faf4ffc
SHA512

d517552bea5b825de25de86d6332a28480078294c62761ea576c3648792dcdc806d984a375c3275e38820bc6ad61a7fdf0e6712fd0c0168af8d2ef9ad42432d0
SSDEEP

12288:Fkfc1hZjmvZQy58/fviZ8rJSgmP21uJ0m5FvRx58bCjFVBPnBhTp/KZ:d1zjmvG3i2la15TgwRBvS

Score

7^/10

persistence

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1572	SERVER~1.EXE
2264	Bifrost.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	1f4f390b42a7f516013d7db571b32115.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1572	SERVER~1.EXE
1572	SERVER~1.EXE
1572	SERVER~1.EXE
1572	SERVER~1.EXE

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2264	Bifrost.exe
2264	Bifrost.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 516 wrote to memory of 1572	516	1f4f390b42a7f516013d7db571b32115.exe	23
PID 516 wrote to memory of 1572	516	1f4f390b42a7f516013d7db571b32115.exe	23
PID 516 wrote to memory of 1572	516	1f4f390b42a7f516013d7db571b32115.exe	23
PID 1572 wrote to memory of 3492	1572	SERVER~1.EXE	49
PID 1572 wrote to memory of 3492	1572	SERVER~1.EXE	49
PID 1572 wrote to memory of 3492	1572	SERVER~1.EXE	49
PID 1572 wrote to memory of 3492	1572	SERVER~1.EXE	49
PID 1572 wrote to memory of 3492	1572	SERVER~1.EXE	49
PID 1572 wrote to memory of 3492	1572	SERVER~1.EXE	49
PID 516 wrote to memory of 2264	516	1f4f390b42a7f516013d7db571b32115.exe	22
PID 516 wrote to memory of 2264	516	1f4f390b42a7f516013d7db571b32115.exe	22
PID 516 wrote to memory of 2264	516	1f4f390b42a7f516013d7db571b32115.exe	22

C:\Users\Admin\AppData\Local\Temp\1f4f390b42a7f516013d7db571b32115.exe
"C:\Users\Admin\AppData\Local\Temp\1f4f390b42a7f516013d7db571b32115.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:516
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\Bifrost.exe
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\Bifrost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:2264
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\SERVER~1.EXE
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\SERVER~1.EXE
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1572

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3492

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1572-8-0x0000000010000000-0x0000000010011000-memory.dmp

Filesize
68KB

Download
memory/1572-6-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1572-18-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1572-16-0x0000000010000000-0x0000000010011000-memory.dmp

Filesize
68KB

Download
memory/2264-22-0x0000000000400000-0x00000000005C0000-memory.dmp

Filesize
1.8MB

Download
memory/2264-23-0x0000000000400000-0x00000000005C0000-memory.dmp

Filesize
1.8MB

Download
memory/2264-24-0x0000000000400000-0x00000000005C0000-memory.dmp

Filesize
1.8MB

Download
memory/3492-10-0x000000007FFF0000-0x000000007FFF1000-memory.dmp

Filesize
4KB

Download
memory/3492-12-0x000000007FFC0000-0x000000007FFC6000-memory.dmp

Filesize
24KB

Download