fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

Analysis

max time kernel
595s
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 11:41

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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 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
2396	mstsca.exe
2536	mstsca.exe
2616	mstsca.exe
1580	mstsca.exe
2260	mstsca.exe
2844	mstsca.exe
1780	mstsca.exe
1672	mstsca.exe
2868	mstsca.exe
2276	mstsca.exe
2652	mstsca.exe
2764	mstsca.exe
2748	mstsca.exe
1040	mstsca.exe
2096	mstsca.exe
1640	mstsca.exe
1960	mstsca.exe
2104	mstsca.exe
1692	mstsca.exe
2892	mstsca.exe

Suspicious use of SetThreadContext 11 IoCs

Processes:

build3.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exemstsca.exe

description	pid	process	target process
PID 2184 set thread context of 1916	2184	build3.exe	build3.exe
PID 2396 set thread context of 2536	2396	mstsca.exe	mstsca.exe
PID 2616 set thread context of 1580	2616	mstsca.exe	mstsca.exe
PID 2260 set thread context of 2844	2260	mstsca.exe	mstsca.exe
PID 1780 set thread context of 1672	1780	mstsca.exe	mstsca.exe
PID 2868 set thread context of 2276	2868	mstsca.exe	mstsca.exe
PID 2652 set thread context of 2764	2652	mstsca.exe	mstsca.exe
PID 2748 set thread context of 1040	2748	mstsca.exe	mstsca.exe
PID 2096 set thread context of 1640	2096	mstsca.exe	mstsca.exe
PID 1960 set thread context of 2104	1960	mstsca.exe	mstsca.exe
PID 1692 set thread context of 2892	1692	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

2464 schtasks.exe
2376 schtasks.exe

pid	process
2464	schtasks.exe
2376	schtasks.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

build3.exebuild3.exetaskeng.exemstsca.exemstsca.exemstsca.exemstsca.exe

description	pid	process	target process
PID 2184 wrote to memory of 1916	2184	build3.exe	build3.exe
PID 2184 wrote to memory of 1916	2184	build3.exe	build3.exe
PID 2184 wrote to memory of 1916	2184	build3.exe	build3.exe
PID 2184 wrote to memory of 1916	2184	build3.exe	build3.exe
PID 2184 wrote to memory of 1916	2184	build3.exe	build3.exe
PID 2184 wrote to memory of 1916	2184	build3.exe	build3.exe
PID 2184 wrote to memory of 1916	2184	build3.exe	build3.exe
PID 2184 wrote to memory of 1916	2184	build3.exe	build3.exe
PID 2184 wrote to memory of 1916	2184	build3.exe	build3.exe
PID 2184 wrote to memory of 1916	2184	build3.exe	build3.exe
PID 1916 wrote to memory of 2464	1916	build3.exe	schtasks.exe
PID 1916 wrote to memory of 2464	1916	build3.exe	schtasks.exe
PID 1916 wrote to memory of 2464	1916	build3.exe	schtasks.exe
PID 1916 wrote to memory of 2464	1916	build3.exe	schtasks.exe
PID 2668 wrote to memory of 2396	2668	taskeng.exe	mstsca.exe
PID 2668 wrote to memory of 2396	2668	taskeng.exe	mstsca.exe
PID 2668 wrote to memory of 2396	2668	taskeng.exe	mstsca.exe
PID 2668 wrote to memory of 2396	2668	taskeng.exe	mstsca.exe
PID 2396 wrote to memory of 2536	2396	mstsca.exe	mstsca.exe
PID 2396 wrote to memory of 2536	2396	mstsca.exe	mstsca.exe
PID 2396 wrote to memory of 2536	2396	mstsca.exe	mstsca.exe
PID 2396 wrote to memory of 2536	2396	mstsca.exe	mstsca.exe
PID 2396 wrote to memory of 2536	2396	mstsca.exe	mstsca.exe
PID 2396 wrote to memory of 2536	2396	mstsca.exe	mstsca.exe
PID 2396 wrote to memory of 2536	2396	mstsca.exe	mstsca.exe
PID 2396 wrote to memory of 2536	2396	mstsca.exe	mstsca.exe
PID 2396 wrote to memory of 2536	2396	mstsca.exe	mstsca.exe
PID 2396 wrote to memory of 2536	2396	mstsca.exe	mstsca.exe
PID 2536 wrote to memory of 2376	2536	mstsca.exe	schtasks.exe
PID 2536 wrote to memory of 2376	2536	mstsca.exe	schtasks.exe
PID 2536 wrote to memory of 2376	2536	mstsca.exe	schtasks.exe
PID 2536 wrote to memory of 2376	2536	mstsca.exe	schtasks.exe
PID 2668 wrote to memory of 2616	2668	taskeng.exe	mstsca.exe
PID 2668 wrote to memory of 2616	2668	taskeng.exe	mstsca.exe
PID 2668 wrote to memory of 2616	2668	taskeng.exe	mstsca.exe
PID 2668 wrote to memory of 2616	2668	taskeng.exe	mstsca.exe
PID 2616 wrote to memory of 1580	2616	mstsca.exe	mstsca.exe
PID 2616 wrote to memory of 1580	2616	mstsca.exe	mstsca.exe
PID 2616 wrote to memory of 1580	2616	mstsca.exe	mstsca.exe
PID 2616 wrote to memory of 1580	2616	mstsca.exe	mstsca.exe
PID 2616 wrote to memory of 1580	2616	mstsca.exe	mstsca.exe
PID 2616 wrote to memory of 1580	2616	mstsca.exe	mstsca.exe
PID 2616 wrote to memory of 1580	2616	mstsca.exe	mstsca.exe
PID 2616 wrote to memory of 1580	2616	mstsca.exe	mstsca.exe
PID 2616 wrote to memory of 1580	2616	mstsca.exe	mstsca.exe
PID 2616 wrote to memory of 1580	2616	mstsca.exe	mstsca.exe
PID 2668 wrote to memory of 2260	2668	taskeng.exe	mstsca.exe
PID 2668 wrote to memory of 2260	2668	taskeng.exe	mstsca.exe
PID 2668 wrote to memory of 2260	2668	taskeng.exe	mstsca.exe
PID 2668 wrote to memory of 2260	2668	taskeng.exe	mstsca.exe
PID 2260 wrote to memory of 2844	2260	mstsca.exe	mstsca.exe
PID 2260 wrote to memory of 2844	2260	mstsca.exe	mstsca.exe
PID 2260 wrote to memory of 2844	2260	mstsca.exe	mstsca.exe
PID 2260 wrote to memory of 2844	2260	mstsca.exe	mstsca.exe
PID 2260 wrote to memory of 2844	2260	mstsca.exe	mstsca.exe
PID 2260 wrote to memory of 2844	2260	mstsca.exe	mstsca.exe
PID 2260 wrote to memory of 2844	2260	mstsca.exe	mstsca.exe
PID 2260 wrote to memory of 2844	2260	mstsca.exe	mstsca.exe
PID 2260 wrote to memory of 2844	2260	mstsca.exe	mstsca.exe
PID 2260 wrote to memory of 2844	2260	mstsca.exe	mstsca.exe
PID 2668 wrote to memory of 1780	2668	taskeng.exe	mstsca.exe
PID 2668 wrote to memory of 1780	2668	taskeng.exe	mstsca.exe
PID 2668 wrote to memory of 1780	2668	taskeng.exe	mstsca.exe
PID 2668 wrote to memory of 1780	2668	taskeng.exe	mstsca.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:2184
- C:\Users\Admin\AppData\Local\Temp\build3.exe
  "C:\Users\Admin\AppData\Local\Temp\build3.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1916
- - 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:2464

C:\Windows\system32\taskeng.exe
taskeng.exe {8C2A758F-DE43-4E92-9298-20435BFBD828} S-1-5-21-1658372521-4246568289-2509113762-1000:PIRBKNPS\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2668
- 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:2396
- - 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:2536
  - - 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:2376
- 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:2616
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:1580
- 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:2260
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:2844
- 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:1780
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:1672
- 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:2868
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:2276
- 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:2652
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:2764
- 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:2748
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:1040
- 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:2096
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:1640
- 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:1960
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:2104
- 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:1692
- - C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    3⤵
    - Executes dropped EXE
    PID:2892

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/1692-159-0x0000000000940000-0x0000000000A40000-memory.dmp

Filesize
1024KB

Download
memory/1780-62-0x00000000002F0000-0x00000000003F0000-memory.dmp

Filesize
1024KB

Download
memory/1916-5-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1916-7-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1916-9-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1916-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1960-142-0x00000000008A0000-0x00000000009A0000-memory.dmp

Filesize
1024KB

Download
memory/2096-126-0x0000000000920000-0x0000000000A20000-memory.dmp

Filesize
1024KB

Download
memory/2184-2-0x0000000000270000-0x0000000000370000-memory.dmp

Filesize
1024KB

Download
memory/2184-4-0x00000000001B0000-0x00000000001B4000-memory.dmp

Filesize
16KB

Download
memory/2260-46-0x00000000008D0000-0x00000000009D0000-memory.dmp

Filesize
1024KB

Download
memory/2396-16-0x0000000000870000-0x0000000000970000-memory.dmp

Filesize
1024KB

Download
memory/2616-31-0x00000000008D0000-0x00000000009D0000-memory.dmp

Filesize
1024KB

Download
memory/2652-98-0x0000000000920000-0x0000000000A20000-memory.dmp

Filesize
1024KB

Download
memory/2748-110-0x00000000008E0000-0x00000000009E0000-memory.dmp

Filesize
1024KB

Download
memory/2868-78-0x0000000000C50000-0x0000000000D50000-memory.dmp

Filesize
1024KB

Download