6bd83bf1f9e735a3c7951f8f55f22cf31156063ad56bf80f94238fd02faf4ffc

Analysis

max time kernel
141s
max time network
123s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-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
2976	SERVER~1.EXE
2664	Bifrost.exe

Loads dropped DLL 4 IoCs

pid	Process
3004	1f4f390b42a7f516013d7db571b32115.exe
3004	1f4f390b42a7f516013d7db571b32115.exe
3004	1f4f390b42a7f516013d7db571b32115.exe
3004	1f4f390b42a7f516013d7db571b32115.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 2 IoCs

pid	Process
2976	SERVER~1.EXE
2976	SERVER~1.EXE

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2664	Bifrost.exe
2664	Bifrost.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3004 wrote to memory of 2976	3004	1f4f390b42a7f516013d7db571b32115.exe	16
PID 3004 wrote to memory of 2976	3004	1f4f390b42a7f516013d7db571b32115.exe	16
PID 3004 wrote to memory of 2976	3004	1f4f390b42a7f516013d7db571b32115.exe	16
PID 3004 wrote to memory of 2976	3004	1f4f390b42a7f516013d7db571b32115.exe	16
PID 2976 wrote to memory of 1268	2976	SERVER~1.EXE	22
PID 2976 wrote to memory of 1268	2976	SERVER~1.EXE	22
PID 2976 wrote to memory of 1268	2976	SERVER~1.EXE	22
PID 2976 wrote to memory of 1268	2976	SERVER~1.EXE	22
PID 2976 wrote to memory of 1268	2976	SERVER~1.EXE	22
PID 2976 wrote to memory of 1268	2976	SERVER~1.EXE	22
PID 3004 wrote to memory of 2664	3004	1f4f390b42a7f516013d7db571b32115.exe	15
PID 3004 wrote to memory of 2664	3004	1f4f390b42a7f516013d7db571b32115.exe	15
PID 3004 wrote to memory of 2664	3004	1f4f390b42a7f516013d7db571b32115.exe	15
PID 3004 wrote to memory of 2664	3004	1f4f390b42a7f516013d7db571b32115.exe	15

C:\Users\Admin\AppData\Local\Temp\1f4f390b42a7f516013d7db571b32115.exe
"C:\Users\Admin\AppData\Local\Temp\1f4f390b42a7f516013d7db571b32115.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3004
- 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:2664
- 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:2976

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1268

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

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Downloads

\Users\Admin\AppData\Local\Temp\IXP000.TMP\SERVER~1.EXE

Filesize
50KB

MD5
15125a0c40de42ea005c6a4b644509b6

SHA1
5b6bb9bfe1292e0484c5810c4e849ea93b7318fc

SHA256
d263207ca0f37e8f84e3ab327b6872b44d7eb7241e42147335ceaac0d1499fa8

SHA512
95d4c7ad359fd5ea5dd7d01d73bba5c69bc309d5fc2efbdb7464e1db4412e4e1e6037f5798fdcb245247ffab1b808621aa5098351295cf5fa913e7fcf63cc747

Download Submit
memory/1268-23-0x000000007EFC0000-0x000000007EFC6000-memory.dmp

Filesize
24KB

Download
memory/1268-14-0x000000007FFF0000-0x000000007FFF1000-memory.dmp

Filesize
4KB

Download
memory/2664-44-0x0000000000400000-0x00000000005C0000-memory.dmp

Filesize
1.8MB

Download
memory/2664-48-0x0000000000400000-0x00000000005C0000-memory.dmp

Filesize
1.8MB

Download
memory/2664-47-0x0000000000400000-0x00000000005C0000-memory.dmp

Filesize
1.8MB

Download
memory/2664-49-0x0000000000400000-0x00000000005C0000-memory.dmp

Filesize
1.8MB

Download
memory/2976-19-0x0000000010000000-0x0000000010011000-memory.dmp

Filesize
68KB

Download
memory/2976-18-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/3004-17-0x00000000001D0000-0x00000000001D9000-memory.dmp

Filesize
36KB

Download
memory/3004-45-0x0000000002ED0000-0x0000000003090000-memory.dmp

Filesize
1.8MB

Download
memory/3004-6-0x00000000001D0000-0x00000000001D9000-memory.dmp

Filesize
36KB

Download