f05700c9cb3ee995d0b557716280c9e79c1f68ee6d57ce7a4f87b0ee4433fe29

Analysis

max time kernel
146s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20230621-en
resource tags

arch:x64arch:x86image:win10v2004-20230621-enlocale:en-usos:windows10-2004-x64system
submitted
30/06/2023, 12:26

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General

Target

Temp1.exe
Size

375KB
MD5

83ccb5c523ac9743f9db41460fe8fcd2
SHA1

25b4f65c963cf5c8ddd5e283e337be74d394768c
SHA256

f05700c9cb3ee995d0b557716280c9e79c1f68ee6d57ce7a4f87b0ee4433fe29
SHA512

8e748c29b7097dcd56f5b7b92d7fcc104d9c11c349f268d258e9b2c6210e2d6bafda2d61b3d97fbe8c2e3b6caffe9b7b995cfee2b3240014029a6775d7af0e99
SSDEEP

6144:rvrQtqccMhb9VxU/aido6WXjQ0WU7+OLBOZYJmQs+gvUUudBfa4AtzqJVHnqRkY4:7cEcc69VixU7+OUZYsmAUUui4azq+iv9

Score

7^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
964	asg.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-508929744-1894537824-211734425-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WSUS Update Client = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Temp1.exe\""	Temp1.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
13	ip-api.com

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\SubDir\asg.exe	Temp1.exe
File opened for modification	C:\Windows\SysWOW64\SubDir\asg.exe	Temp1.exe
File opened for modification	C:\Windows\SysWOW64\SubDir\asg.exe	asg.exe
File opened for modification	C:\Windows\SysWOW64\SubDir	asg.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
3760	schtasks.exe
4772	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2664	Temp1.exe
Token: SeDebugPrivilege	964	asg.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
964	asg.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2664 wrote to memory of 3760	2664	Temp1.exe	84
PID 2664 wrote to memory of 3760	2664	Temp1.exe	84
PID 2664 wrote to memory of 964	2664	Temp1.exe	86
PID 2664 wrote to memory of 964	2664	Temp1.exe	86
PID 964 wrote to memory of 4772	964	asg.exe	89
PID 964 wrote to memory of 4772	964	asg.exe	89

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Temp1.exe
"C:\Users\Admin\AppData\Local\Temp\Temp1.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2664
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "WSUS Update Client" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Temp1.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:3760
- C:\Windows\SysWOW64\SubDir\asg.exe
  "C:\Windows\SysWOW64\SubDir\asg.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:964
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "WSUS Update Client" /sc ONLOGON /tr "C:\Windows\SysWOW64\SubDir\asg.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4772

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\SubDir\asg.exe

Filesize
375KB

MD5
83ccb5c523ac9743f9db41460fe8fcd2

SHA1
25b4f65c963cf5c8ddd5e283e337be74d394768c

SHA256
f05700c9cb3ee995d0b557716280c9e79c1f68ee6d57ce7a4f87b0ee4433fe29

SHA512
8e748c29b7097dcd56f5b7b92d7fcc104d9c11c349f268d258e9b2c6210e2d6bafda2d61b3d97fbe8c2e3b6caffe9b7b995cfee2b3240014029a6775d7af0e99

Download Submit
C:\Windows\SysWOW64\SubDir\asg.exe

Filesize
375KB

MD5
83ccb5c523ac9743f9db41460fe8fcd2

SHA1
25b4f65c963cf5c8ddd5e283e337be74d394768c

SHA256
f05700c9cb3ee995d0b557716280c9e79c1f68ee6d57ce7a4f87b0ee4433fe29

SHA512
8e748c29b7097dcd56f5b7b92d7fcc104d9c11c349f268d258e9b2c6210e2d6bafda2d61b3d97fbe8c2e3b6caffe9b7b995cfee2b3240014029a6775d7af0e99

Download Submit
memory/964-143-0x000000001B1C0000-0x000000001B1D0000-memory.dmp

Filesize
64KB

Download
memory/964-145-0x000000001B1C0000-0x000000001B1D0000-memory.dmp

Filesize
64KB

Download
memory/2664-133-0x0000000000F90000-0x0000000000FA0000-memory.dmp

Filesize
64KB

Download
memory/2664-134-0x000000001BC10000-0x000000001BC20000-memory.dmp

Filesize
64KB

Download
memory/2664-135-0x0000000003110000-0x0000000003122000-memory.dmp

Filesize
72KB

Download
memory/2664-136-0x000000001BB10000-0x000000001BB4C000-memory.dmp

Filesize
240KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads