fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

Resubmissions

08-02-2024 14:09

240208-rggrdafg97 8

08-02-2024 14:06

240208-rehkwsfg86 8

Analysis

max time kernel
143s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
08-02-2024 14:06

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General

Target

build3.exe
Size

299KB
MD5

41b883a061c95e9b9cb17d4ca50de770
SHA1

1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad
SHA256

fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408
SHA512

cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319
SSDEEP

6144:2neDcgRQv5VaNT9DW7a6dtM9VstSttuvqIT:2O0v5VuT9DW7hdt9tKt2qI

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 3 IoCs

Processes:

mstsca.exemstsca.exemstsca.exe

pid process

3488 mstsca.exe
1988 mstsca.exe
1200 mstsca.exe

pid	process
3488	mstsca.exe
1988	mstsca.exe
1200	mstsca.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

build3.exemstsca.exe

description	pid	process	target process
PID 3604 set thread context of 2356	3604	build3.exe	build3.exe
PID 3488 set thread context of 1988	3488	mstsca.exe	mstsca.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/Job
T1053

Processes:

schtasks.exeschtasks.exe

pid process

836 schtasks.exe
1220 schtasks.exe

pid	process
836	schtasks.exe
1220	schtasks.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

build3.exebuild3.exemstsca.exemstsca.exe

description	pid	process	target process
PID 3604 wrote to memory of 2356	3604	build3.exe	build3.exe
PID 3604 wrote to memory of 2356	3604	build3.exe	build3.exe
PID 3604 wrote to memory of 2356	3604	build3.exe	build3.exe
PID 3604 wrote to memory of 2356	3604	build3.exe	build3.exe
PID 3604 wrote to memory of 2356	3604	build3.exe	build3.exe
PID 3604 wrote to memory of 2356	3604	build3.exe	build3.exe
PID 3604 wrote to memory of 2356	3604	build3.exe	build3.exe
PID 3604 wrote to memory of 2356	3604	build3.exe	build3.exe
PID 3604 wrote to memory of 2356	3604	build3.exe	build3.exe
PID 2356 wrote to memory of 836	2356	build3.exe	schtasks.exe
PID 2356 wrote to memory of 836	2356	build3.exe	schtasks.exe
PID 2356 wrote to memory of 836	2356	build3.exe	schtasks.exe
PID 3488 wrote to memory of 1988	3488	mstsca.exe	mstsca.exe
PID 3488 wrote to memory of 1988	3488	mstsca.exe	mstsca.exe
PID 3488 wrote to memory of 1988	3488	mstsca.exe	mstsca.exe
PID 3488 wrote to memory of 1988	3488	mstsca.exe	mstsca.exe
PID 3488 wrote to memory of 1988	3488	mstsca.exe	mstsca.exe
PID 3488 wrote to memory of 1988	3488	mstsca.exe	mstsca.exe
PID 3488 wrote to memory of 1988	3488	mstsca.exe	mstsca.exe
PID 3488 wrote to memory of 1988	3488	mstsca.exe	mstsca.exe
PID 3488 wrote to memory of 1988	3488	mstsca.exe	mstsca.exe
PID 1988 wrote to memory of 1220	1988	mstsca.exe	schtasks.exe
PID 1988 wrote to memory of 1220	1988	mstsca.exe	schtasks.exe
PID 1988 wrote to memory of 1220	1988	mstsca.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\build3.exe
"C:\Users\Admin\AppData\Local\Temp\build3.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3604
- C:\Users\Admin\AppData\Local\Temp\build3.exe
  "C:\Users\Admin\AppData\Local\Temp\build3.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2356
- - C:\Windows\SysWOW64\schtasks.exe
    /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
    3⤵
    - Creates scheduled task(s)
    PID:836

C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3488
- C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
  C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:1988
- - C:\Windows\SysWOW64\schtasks.exe
    /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
    3⤵
    - Creates scheduled task(s)
    PID:1220

C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
1⤵
- Executes dropped EXE
PID:1200

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

Filesize
299KB

MD5
41b883a061c95e9b9cb17d4ca50de770

SHA1
1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

SHA256
fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

SHA512
cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

Download Submit
memory/2356-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2356-6-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2356-5-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2356-8-0x0000000000410000-0x00000000004D9000-memory.dmp

Filesize
804KB

Download
memory/3488-13-0x00000000009A0000-0x0000000000AA0000-memory.dmp

Filesize
1024KB

Download
memory/3604-1-0x0000000000970000-0x0000000000A70000-memory.dmp

Filesize
1024KB

Download
memory/3604-2-0x0000000000950000-0x0000000000954000-memory.dmp

Filesize
16KB

Download