d5747c8e8c82c82f3dbcd8ef656c5b6485d54b6598849ccd503e94955ab90450

Analysis

max time kernel
129s
max time network
133s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
07/09/2024, 14:05

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General

Target

AspSWeb.exe
Size

688KB
MD5

3b12a13eedbe6e6816f3cb62baf8751a
SHA1

d02c4b830efa1cbce5ec39f71a2290a4d9ccb7e9
SHA256

e6a580c6ed95ffb1a29f4a862370db60ea2295d75e3100b987196361f403d187
SHA512

071220c5c2d6d05fb79ae96a48069a18a698d983adef7f588ce7672dc16a380f1e180ba167d1c66bef76f5dc770bab3f66244d87f41d944252f69be919350cec
SSDEEP

12288:7/JFZqYMOaQ0q9nV/zsnK23KHVI6nodVdyMLiqyVcxwtVxgpMiuzOT6:7BFZqhOBnVyK23C6OoYMLiVcKtVx4Mij

Score

7^/10

bootkit discovery persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2628	TMPNB28.tmp

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\a:	TMPNB28.tmp
File opened (read-only)	\??\p:	TMPNB28.tmp
File opened (read-only)	\??\x:	TMPNB28.tmp
File opened (read-only)	\??\z:	TMPNB28.tmp
File opened (read-only)	\??\g:	TMPNB28.tmp
File opened (read-only)	\??\k:	TMPNB28.tmp
File opened (read-only)	\??\q:	TMPNB28.tmp
File opened (read-only)	\??\r:	TMPNB28.tmp
File opened (read-only)	\??\u:	TMPNB28.tmp
File opened (read-only)	\??\v:	TMPNB28.tmp
File opened (read-only)	\??\y:	TMPNB28.tmp
File opened (read-only)	\??\i:	TMPNB28.tmp
File opened (read-only)	\??\l:	TMPNB28.tmp
File opened (read-only)	\??\m:	TMPNB28.tmp
File opened (read-only)	\??\o:	TMPNB28.tmp
File opened (read-only)	\??\s:	TMPNB28.tmp
File opened (read-only)	\??\t:	TMPNB28.tmp
File opened (read-only)	\??\b:	TMPNB28.tmp
File opened (read-only)	\??\e:	TMPNB28.tmp
File opened (read-only)	\??\h:	TMPNB28.tmp
File opened (read-only)	\??\j:	TMPNB28.tmp
File opened (read-only)	\??\n:	TMPNB28.tmp
File opened (read-only)	\??\w:	TMPNB28.tmp

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	TMPNB28.tmp

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\TMPNB28.tmp	AspSWeb.exe
File created	C:\Windows\SysWOW64\TMPNB28.tmp	AspSWeb.exe

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	TMPNB28.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AspSWeb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NETSTAT.EXE

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
4884	NETSTAT.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2628	TMPNB28.tmp
2628	TMPNB28.tmp

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1980	AspSWeb.exe
Token: SeDebugPrivilege	4884	NETSTAT.EXE

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1980	AspSWeb.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1980	AspSWeb.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1980	AspSWeb.exe
2628	TMPNB28.tmp
2628	TMPNB28.tmp

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1980 wrote to memory of 2388	1980	AspSWeb.exe	91
PID 1980 wrote to memory of 2388	1980	AspSWeb.exe	91
PID 1980 wrote to memory of 2388	1980	AspSWeb.exe	91
PID 2388 wrote to memory of 4884	2388	cmd.exe	93
PID 2388 wrote to memory of 4884	2388	cmd.exe	93
PID 2388 wrote to memory of 4884	2388	cmd.exe	93
PID 1980 wrote to memory of 2628	1980	AspSWeb.exe	94
PID 1980 wrote to memory of 2628	1980	AspSWeb.exe	94
PID 1980 wrote to memory of 2628	1980	AspSWeb.exe	94

C:\Users\Admin\AppData\Local\Temp\AspSWeb.exe
"C:\Users\Admin\AppData\Local\Temp\AspSWeb.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1980
- C:\Windows\SysWOW64\cmd.exe
  cmd /c netstat /na
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2388
- - C:\Windows\SysWOW64\NETSTAT.EXE
    netstat /na
    3⤵
    - System Location Discovery: System Language Discovery
    - Gathers network information
    - Suspicious use of AdjustPrivilegeToken
    PID:4884
- C:\Windows\SysWOW64\TMPNB28.tmp
  C:\Windows\system32\TMPNB28.tmp -run C:\Users\Admin\AppData\Local\Temp\nb28.tmp
  2⤵
  - Executes dropped EXE
  - Enumerates connected drives
  - Writes to the Master Boot Record (MBR)
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:2628

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4124,i,9445584274764997943,12714240264001792460,262144 --variations-seed-version --mojo-platform-channel-handle=4120 /prefetch:8
1⤵
PID:4240

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nb28.tmp

Filesize
2KB

MD5
b9fabc9c8a8024d47651300032402d96

SHA1
f974e93bc3352b1e042ebdc6327cdc41e92d7ced

SHA256
e310a45cf5bda24644736a30880f1c2af8c3714831f14c25365ae12c30432a78

SHA512
6273d041544cf6c044d8b0fb19805fb8e407523de1b69af8ee77d80a7271cacab8abd752dd99351e7593388c87c0c94591f788c946343dfbd19436b431a9f7c4

Download Submit
C:\Windows\SysWOW64\TMPNB28.tmp

Filesize
633KB

MD5
3545fd00d2ba6c1c192b05bd75aa1f4f

SHA1
30fa4c33d66a073113d9d971baae38120d320601

SHA256
d6272081522372d09a11ca7c0825b8c6a743ba02b450cea1402c03a05f3e2159

SHA512
ab79f44e7c428ea0434bced04256174a7d87131ddef2488a71ca67e242bce9676cb88830779aa0a0c3d5b12e097bd32bb99a87c12a248329d9c8a52d777a1c85

Download Submit
memory/2628-6-0x0000000000400000-0x0000000000597000-memory.dmp

Filesize
1.6MB

Download
memory/2628-11-0x0000000000400000-0x0000000000597000-memory.dmp

Filesize
1.6MB

Download