modiloader | bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
24-12-2024 01:17

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General

Target

bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe
Size

90KB
MD5

6f95d6df03c782b20af78ca116751266
SHA1

74048f210a4664c9bb5fda2310f62799c5d2fbdf
SHA256

bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5
SHA512

4ed531c5a1a2d7655118420d58f8cd004b3ed41b8fc7f029b174abd00c73f347b9a60cb49662f91a70aa0df0ed4a8f923aff2dc6f800bf8c4798d060d03bff11
SSDEEP

1536:UiYwjQt6QJvzZsgDIWzm/xsXfv+hYhyQQyV5uv4JBrB7w5VRGulTG1ZCL8nj1oDN:0wjZQJvzZsgsW6/Afv+hYfQIm4/rdE37

Score

10^/10

modiloader discovery persistence trojan upx

Malware Config

Signatures

ModiLoader, DBatLoader
ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.
trojan modiloader
Modiloader family
modiloader

ModiLoader Second Stage 4 IoCs

resource	yara_rule
behavioral2/memory/2832-57-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/2832-56-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/2832-54-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/2832-62-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe

Executes dropped EXE 3 IoCs

pid	Process
2900	csrsll.exe
2988	csrsll.exe
2832	csrsll.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Win Pdf = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrsll.exe"	reg.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4000 set thread context of 376	4000	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe	86
PID 2900 set thread context of 2988	2900	csrsll.exe	95
PID 2900 set thread context of 2832	2900	csrsll.exe	96

UPX packed file 19 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4000-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4000-5-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/376-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/376-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4000-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/376-13-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x000b000000023b7f-29.dat	upx
behavioral2/memory/376-39-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2900-40-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2900-41-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2832-45-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2832-52-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2832-57-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2832-56-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2900-55-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2832-54-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/376-60-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2988-61-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2832-62-0x0000000000400000-0x0000000000414000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe
Token: SeDebugPrivilege	2988	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4000	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe
376	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe
2900	csrsll.exe
2988	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 4000 wrote to memory of 376	4000	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe	86
PID 4000 wrote to memory of 376	4000	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe	86
PID 4000 wrote to memory of 376	4000	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe	86
PID 4000 wrote to memory of 376	4000	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe	86
PID 4000 wrote to memory of 376	4000	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe	86
PID 4000 wrote to memory of 376	4000	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe	86
PID 4000 wrote to memory of 376	4000	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe	86
PID 4000 wrote to memory of 376	4000	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe	86
PID 376 wrote to memory of 400	376	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe	88
PID 376 wrote to memory of 400	376	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe	88
PID 376 wrote to memory of 400	376	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe	88
PID 400 wrote to memory of 2632	400	cmd.exe	91
PID 400 wrote to memory of 2632	400	cmd.exe	91
PID 400 wrote to memory of 2632	400	cmd.exe	91
PID 376 wrote to memory of 2900	376	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe	92
PID 376 wrote to memory of 2900	376	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe	92
PID 376 wrote to memory of 2900	376	bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe	92
PID 2900 wrote to memory of 2988	2900	csrsll.exe	95
PID 2900 wrote to memory of 2988	2900	csrsll.exe	95
PID 2900 wrote to memory of 2988	2900	csrsll.exe	95
PID 2900 wrote to memory of 2988	2900	csrsll.exe	95
PID 2900 wrote to memory of 2988	2900	csrsll.exe	95
PID 2900 wrote to memory of 2988	2900	csrsll.exe	95
PID 2900 wrote to memory of 2988	2900	csrsll.exe	95
PID 2900 wrote to memory of 2988	2900	csrsll.exe	95
PID 2900 wrote to memory of 2832	2900	csrsll.exe	96
PID 2900 wrote to memory of 2832	2900	csrsll.exe	96
PID 2900 wrote to memory of 2832	2900	csrsll.exe	96
PID 2900 wrote to memory of 2832	2900	csrsll.exe	96
PID 2900 wrote to memory of 2832	2900	csrsll.exe	96
PID 2900 wrote to memory of 2832	2900	csrsll.exe	96
PID 2900 wrote to memory of 2832	2900	csrsll.exe	96
PID 2900 wrote to memory of 2832	2900	csrsll.exe	96

C:\Users\Admin\AppData\Local\Temp\bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe
"C:\Users\Admin\AppData\Local\Temp\bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4000
- C:\Users\Admin\AppData\Local\Temp\bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe
  "C:\Users\Admin\AppData\Local\Temp\bff33c010d44e33da79a9dfd7e401528ba39f18f95eb68c84358634363ccb6e5.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:376
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\UIJFD.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:400
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Win Pdf" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe" /f
      4⤵
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:2632
- - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2900
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:2988
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:2832

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\UIJFD.txt

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe

Filesize
90KB

MD5
be4ae683984470a33f8f55e513dd7bad

SHA1
4989d92b9782b564b6c6c2c1609d2c576a7006d5

SHA256
a38207821f20c1ce9ea794b060b6a1bd5be1b7502d211271565e0f341dc8c554

SHA512
1201929d5b546e79d0784f787b35701ad0998680b6ba1b5578ff494c80f75e1f6602e5cd7785845f2ebcf746f5bd8de65cc8174da46a130b890dd4bfc3338d7b

Download Submit
memory/376-58-0x0000000000410000-0x00000000004D9000-memory.dmp

Filesize
804KB

Download
memory/376-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/376-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/376-13-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/376-60-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/376-39-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2832-45-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2832-54-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2832-56-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2832-62-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2832-57-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2832-52-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2900-40-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2900-41-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2900-55-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2988-61-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4000-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4000-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4000-6-0x0000000002330000-0x0000000002332000-memory.dmp

Filesize
8KB

Download
memory/4000-5-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4000-4-0x0000000002310000-0x0000000002312000-memory.dmp

Filesize
8KB

Download
memory/4000-3-0x0000000002300000-0x0000000002302000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads