fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

Analysis

max time kernel
598s
max time network
362s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
04-04-2024 12:07

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General

Target

mstsca.exe
Size

299KB
MD5

41b883a061c95e9b9cb17d4ca50de770
SHA1

1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad
SHA256

fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408
SHA512

cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319
SSDEEP

6144:2neDcgRQv5VaNT9DW7a6dtM9VstSttuvqIT:2O0v5VuT9DW7hdt9tKt2qI

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 20 IoCs

Processes:

mstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exe

pid	process
2496	mstsca.exe
2520	mstsca.exe
2688	mstsca.exe
2768	mstsca.exe
1096	mstsca.exe
484	mstsca.exe
884	mstsca.exe
2068	mstsca.exe
824	mstsca.exe
2148	mstsca.exe
2576	mstsca.exe
2632	mstsca.exe
2736	mstsca.exe
612	mstsca.exe
436	mstsca.exe
1532	mstsca.exe
3056	mstsca.exe
2164	mstsca.exe
832	mstsca.exe
1328	mstsca.exe

Suspicious use of SetThreadContext 11 IoCs

Processes:

mstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exe

description	pid	process	target process
PID 2304 set thread context of 2312	2304	mstsca.exe	mstsca.exe
PID 2496 set thread context of 2520	2496	mstsca.exe	mstsca.exe
PID 2688 set thread context of 2768	2688	mstsca.exe	mstsca.exe
PID 1096 set thread context of 484	1096	mstsca.exe	mstsca.exe
PID 884 set thread context of 2068	884	mstsca.exe	mstsca.exe
PID 824 set thread context of 2148	824	mstsca.exe	mstsca.exe
PID 2576 set thread context of 2632	2576	mstsca.exe	mstsca.exe
PID 2736 set thread context of 612	2736	mstsca.exe	mstsca.exe
PID 436 set thread context of 1532	436	mstsca.exe	mstsca.exe
PID 3056 set thread context of 2164	3056	mstsca.exe	mstsca.exe
PID 832 set thread context of 1328	832	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

2100 schtasks.exe
2664 schtasks.exe

pid	process
2100	schtasks.exe
2664	schtasks.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

mstsca.exemstsca.exetaskeng.exemstsca.exemstsca.exemstsca.exemstsca.exe

description	pid	process	target process
PID 2304 wrote to memory of 2312	2304	mstsca.exe	mstsca.exe
PID 2304 wrote to memory of 2312	2304	mstsca.exe	mstsca.exe
PID 2304 wrote to memory of 2312	2304	mstsca.exe	mstsca.exe
PID 2304 wrote to memory of 2312	2304	mstsca.exe	mstsca.exe
PID 2304 wrote to memory of 2312	2304	mstsca.exe	mstsca.exe
PID 2304 wrote to memory of 2312	2304	mstsca.exe	mstsca.exe
PID 2304 wrote to memory of 2312	2304	mstsca.exe	mstsca.exe
PID 2304 wrote to memory of 2312	2304	mstsca.exe	mstsca.exe
PID 2304 wrote to memory of 2312	2304	mstsca.exe	mstsca.exe
PID 2304 wrote to memory of 2312	2304	mstsca.exe	mstsca.exe
PID 2312 wrote to memory of 2100	2312	mstsca.exe	schtasks.exe
PID 2312 wrote to memory of 2100	2312	mstsca.exe	schtasks.exe
PID 2312 wrote to memory of 2100	2312	mstsca.exe	schtasks.exe
PID 2312 wrote to memory of 2100	2312	mstsca.exe	schtasks.exe
PID 2460 wrote to memory of 2496	2460	taskeng.exe	mstsca.exe
PID 2460 wrote to memory of 2496	2460	taskeng.exe	mstsca.exe
PID 2460 wrote to memory of 2496	2460	taskeng.exe	mstsca.exe
PID 2460 wrote to memory of 2496	2460	taskeng.exe	mstsca.exe
PID 2496 wrote to memory of 2520	2496	mstsca.exe	mstsca.exe
PID 2496 wrote to memory of 2520	2496	mstsca.exe	mstsca.exe
PID 2496 wrote to memory of 2520	2496	mstsca.exe	mstsca.exe
PID 2496 wrote to memory of 2520	2496	mstsca.exe	mstsca.exe
PID 2496 wrote to memory of 2520	2496	mstsca.exe	mstsca.exe
PID 2496 wrote to memory of 2520	2496	mstsca.exe	mstsca.exe
PID 2496 wrote to memory of 2520	2496	mstsca.exe	mstsca.exe
PID 2496 wrote to memory of 2520	2496	mstsca.exe	mstsca.exe
PID 2496 wrote to memory of 2520	2496	mstsca.exe	mstsca.exe
PID 2496 wrote to memory of 2520	2496	mstsca.exe	mstsca.exe
PID 2520 wrote to memory of 2664	2520	mstsca.exe	schtasks.exe
PID 2520 wrote to memory of 2664	2520	mstsca.exe	schtasks.exe
PID 2520 wrote to memory of 2664	2520	mstsca.exe	schtasks.exe
PID 2520 wrote to memory of 2664	2520	mstsca.exe	schtasks.exe
PID 2460 wrote to memory of 2688	2460	taskeng.exe	mstsca.exe
PID 2460 wrote to memory of 2688	2460	taskeng.exe	mstsca.exe
PID 2460 wrote to memory of 2688	2460	taskeng.exe	mstsca.exe
PID 2460 wrote to memory of 2688	2460	taskeng.exe	mstsca.exe
PID 2688 wrote to memory of 2768	2688	mstsca.exe	mstsca.exe
PID 2688 wrote to memory of 2768	2688	mstsca.exe	mstsca.exe
PID 2688 wrote to memory of 2768	2688	mstsca.exe	mstsca.exe
PID 2688 wrote to memory of 2768	2688	mstsca.exe	mstsca.exe
PID 2688 wrote to memory of 2768	2688	mstsca.exe	mstsca.exe
PID 2688 wrote to memory of 2768	2688	mstsca.exe	mstsca.exe
PID 2688 wrote to memory of 2768	2688	mstsca.exe	mstsca.exe
PID 2688 wrote to memory of 2768	2688	mstsca.exe	mstsca.exe
PID 2688 wrote to memory of 2768	2688	mstsca.exe	mstsca.exe
PID 2688 wrote to memory of 2768	2688	mstsca.exe	mstsca.exe
PID 2460 wrote to memory of 1096	2460	taskeng.exe	mstsca.exe
PID 2460 wrote to memory of 1096	2460	taskeng.exe	mstsca.exe
PID 2460 wrote to memory of 1096	2460	taskeng.exe	mstsca.exe
PID 2460 wrote to memory of 1096	2460	taskeng.exe	mstsca.exe
PID 1096 wrote to memory of 484	1096	mstsca.exe	mstsca.exe
PID 1096 wrote to memory of 484	1096	mstsca.exe	mstsca.exe
PID 1096 wrote to memory of 484	1096	mstsca.exe	mstsca.exe
PID 1096 wrote to memory of 484	1096	mstsca.exe	mstsca.exe
PID 1096 wrote to memory of 484	1096	mstsca.exe	mstsca.exe
PID 1096 wrote to memory of 484	1096	mstsca.exe	mstsca.exe
PID 1096 wrote to memory of 484	1096	mstsca.exe	mstsca.exe
PID 1096 wrote to memory of 484	1096	mstsca.exe	mstsca.exe
PID 1096 wrote to memory of 484	1096	mstsca.exe	mstsca.exe
PID 1096 wrote to memory of 484	1096	mstsca.exe	mstsca.exe
PID 2460 wrote to memory of 884	2460	taskeng.exe	mstsca.exe
PID 2460 wrote to memory of 884	2460	taskeng.exe	mstsca.exe
PID 2460 wrote to memory of 884	2460	taskeng.exe	mstsca.exe
PID 2460 wrote to memory of 884	2460	taskeng.exe	mstsca.exe

C:\Users\Admin\AppData\Local\Temp\mstsca.exe
"C:\Users\Admin\AppData\Local\Temp\mstsca.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2304
- C:\Users\Admin\AppData\Local\Temp\mstsca.exe
  "C:\Users\Admin\AppData\Local\Temp\mstsca.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2312
- - 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:2100

C:\Windows\system32\taskeng.exe
taskeng.exe {F12488C2-60AA-4874-ADA6-F5E5F9D9D4BF} S-1-5-21-1658372521-4246568289-2509113762-1000:PIRBKNPS\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2460
- 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 SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:2496
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:2520
  - - 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"
      4⤵
      Creates scheduled task(s)
      PID:2664
- 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 SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:2688
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:2768
- 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 SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1096
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:484
- 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 SetThreadContext
  PID:884
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:2068
- 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 SetThreadContext
  PID:824
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:2148
- 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 SetThreadContext
  PID:2576
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:2632
- 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 SetThreadContext
  PID:2736
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:612
- 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 SetThreadContext
  PID:436
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:1532
- 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 SetThreadContext
  PID:3056
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:2164
- 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 SetThreadContext
  PID:832
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:1328

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/436-131-0x00000000008A2000-0x00000000008B2000-memory.dmp

Filesize
64KB

Download
memory/484-52-0x0000000000410000-0x0000000000591000-memory.dmp

Filesize
1.5MB

Download
memory/824-83-0x0000000000250000-0x0000000000350000-memory.dmp

Filesize
1024KB

Download
memory/832-164-0x0000000000870000-0x0000000000970000-memory.dmp

Filesize
1024KB

Download
memory/884-67-0x0000000000910000-0x0000000000A10000-memory.dmp

Filesize
1024KB

Download
memory/1096-45-0x00000000002B0000-0x00000000003B0000-memory.dmp

Filesize
1024KB

Download
memory/2304-22-0x0000000000220000-0x0000000000224000-memory.dmp

Filesize
16KB

Download
memory/2304-5-0x0000000000220000-0x0000000000224000-memory.dmp

Filesize
16KB

Download
memory/2304-3-0x0000000000940000-0x0000000000A40000-memory.dmp

Filesize
1024KB

Download
memory/2312-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2312-9-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2312-7-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2312-4-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2496-14-0x00000000008B0000-0x00000000009B0000-memory.dmp

Filesize
1024KB

Download
memory/2576-99-0x0000000000A02000-0x0000000000A12000-memory.dmp

Filesize
64KB

Download
memory/2688-33-0x00000000008F2000-0x0000000000902000-memory.dmp

Filesize
64KB

Download
memory/2736-113-0x0000000000930000-0x0000000000A30000-memory.dmp

Filesize
1024KB

Download
memory/3056-143-0x00000000009C0000-0x0000000000AC0000-memory.dmp

Filesize
1024KB

Download