f05700c9cb3ee995d0b557716280c9e79c1f68ee6d57ce7a4f87b0ee4433fe29

Analysis

max time kernel
146s
max time network
152s
platform
windows7_x64
resource
win7-20230621-en
resource tags

arch:x64arch:x86image:win7-20230621-enlocale:en-usos:windows7-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

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

asg.exe

pid process

1020 asg.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.

Processes:

flow ioc

1 ip-api.com

pid	process
1020	asg.exe

flow	ioc
1	ip-api.com

Drops file in System32 directory 4 IoCs

Processes:

Temp1.exeasg.exe

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

Processes:

schtasks.exeschtasks.exe

pid process

1648 schtasks.exe
1860 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Temp1.exeasg.exe

description pid process

Token: SeDebugPrivilege 1720 Temp1.exe
Token: SeDebugPrivilege 1020 asg.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

asg.exe

pid process

1020 asg.exe

pid	process
1648	schtasks.exe
1860	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	1720	Temp1.exe
Token: SeDebugPrivilege	1020	asg.exe

pid	process
1020	asg.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

Temp1.exeasg.exe

description	pid	process	target process
PID 1720 wrote to memory of 1860	1720	Temp1.exe	schtasks.exe
PID 1720 wrote to memory of 1860	1720	Temp1.exe	schtasks.exe
PID 1720 wrote to memory of 1860	1720	Temp1.exe	schtasks.exe
PID 1720 wrote to memory of 1020	1720	Temp1.exe	asg.exe
PID 1720 wrote to memory of 1020	1720	Temp1.exe	asg.exe
PID 1720 wrote to memory of 1020	1720	Temp1.exe	asg.exe
PID 1020 wrote to memory of 1648	1020	asg.exe	schtasks.exe
PID 1020 wrote to memory of 1648	1020	asg.exe	schtasks.exe
PID 1020 wrote to memory of 1648	1020	asg.exe	schtasks.exe

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⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1720
- 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:1860
- 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:1020
- - 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:1648

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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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/1020-62-0x0000000001240000-0x0000000001250000-memory.dmp

Filesize
64KB

Download
memory/1020-63-0x0000000000250000-0x00000000002F6000-memory.dmp

Filesize
664KB

Download
memory/1020-65-0x000000001B0B0000-0x000000001B130000-memory.dmp

Filesize
512KB

Download
memory/1020-66-0x000000001B0B0000-0x000000001B130000-memory.dmp

Filesize
512KB

Download
memory/1720-54-0x0000000001050000-0x0000000001060000-memory.dmp

Filesize
64KB

Download
memory/1720-55-0x0000000000B70000-0x0000000000C16000-memory.dmp

Filesize
664KB

Download
memory/1720-56-0x000000001AE90000-0x000000001AF10000-memory.dmp

Filesize
512KB

Download