modiloader | 3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405b

Analysis

max time kernel
118s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
03-11-2024 03:15

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General

Target

3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe
Size

90KB
MD5

3815688039508c615f55f0e78e33b220
SHA1

d1f569fd763296f924c3893b18097629177afc7a
SHA256

3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405b
SHA512

cf484974d5aee66250db465245b56881935390e1275535ce72699ba877bf6cebeec133f4d52a08a00836b6ac3735cc2b845f44c6d2678edcd718a08cbee7f79e
SSDEEP

1536:UiYwjQt6QJvzZsgDIWzm/xsXfv+hYhyQQyV5uv4JBrB7w5VRGulTG1ZCL8nj1oDK:0wjZQJvzZsgsW6/Afv+hYfQIm4/rdE3Y

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

Processes:

resource	yara_rule
behavioral2/memory/3540-54-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3540-56-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3540-59-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3540-64-0x0000000000400000-0x0000000000414000-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

Processes:

3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe

Executes dropped EXE 3 IoCs

Processes:

csrsll.execsrsll.execsrsll.exe

pid	Process
1076	csrsll.exe
1788	csrsll.exe
3540	csrsll.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

reg.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Win Pdf = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrsll.exe"	reg.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.execsrsll.exe

description	pid	Process	procid_target
PID 1092 set thread context of 3728	1092	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe	94
PID 1076 set thread context of 1788	1076	csrsll.exe	102
PID 1076 set thread context of 3540	1076	csrsll.exe	103

UPX packed file 20 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1092-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1092-5-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3728-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3728-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1092-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3728-13-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x000d000000023b5f-29.dat	upx
behavioral2/memory/1076-36-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3728-41-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1076-42-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1076-43-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3540-47-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3540-52-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3540-54-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3540-56-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1076-58-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3540-59-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3728-62-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1788-63-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3540-64-0x0000000000400000-0x0000000000414000-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

Processes:

csrsll.execsrsll.exe3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.execmd.exereg.execsrsll.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.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

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

csrsll.exe

description	pid	Process
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe
Token: SeDebugPrivilege	1788	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.execsrsll.execsrsll.exe

pid	Process
1092	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe
3728	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe
1076	csrsll.exe
1788	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

Processes:

3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.execmd.execsrsll.exe

description	pid	Process	procid_target
PID 1092 wrote to memory of 3728	1092	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe	94
PID 1092 wrote to memory of 3728	1092	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe	94
PID 1092 wrote to memory of 3728	1092	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe	94
PID 1092 wrote to memory of 3728	1092	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe	94
PID 1092 wrote to memory of 3728	1092	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe	94
PID 1092 wrote to memory of 3728	1092	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe	94
PID 1092 wrote to memory of 3728	1092	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe	94
PID 1092 wrote to memory of 3728	1092	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe	94
PID 3728 wrote to memory of 3512	3728	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe	97
PID 3728 wrote to memory of 3512	3728	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe	97
PID 3728 wrote to memory of 3512	3728	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe	97
PID 3512 wrote to memory of 1768	3512	cmd.exe	100
PID 3512 wrote to memory of 1768	3512	cmd.exe	100
PID 3512 wrote to memory of 1768	3512	cmd.exe	100
PID 3728 wrote to memory of 1076	3728	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe	101
PID 3728 wrote to memory of 1076	3728	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe	101
PID 3728 wrote to memory of 1076	3728	3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe	101
PID 1076 wrote to memory of 1788	1076	csrsll.exe	102
PID 1076 wrote to memory of 1788	1076	csrsll.exe	102
PID 1076 wrote to memory of 1788	1076	csrsll.exe	102
PID 1076 wrote to memory of 1788	1076	csrsll.exe	102
PID 1076 wrote to memory of 1788	1076	csrsll.exe	102
PID 1076 wrote to memory of 1788	1076	csrsll.exe	102
PID 1076 wrote to memory of 1788	1076	csrsll.exe	102
PID 1076 wrote to memory of 1788	1076	csrsll.exe	102
PID 1076 wrote to memory of 3540	1076	csrsll.exe	103
PID 1076 wrote to memory of 3540	1076	csrsll.exe	103
PID 1076 wrote to memory of 3540	1076	csrsll.exe	103
PID 1076 wrote to memory of 3540	1076	csrsll.exe	103
PID 1076 wrote to memory of 3540	1076	csrsll.exe	103
PID 1076 wrote to memory of 3540	1076	csrsll.exe	103
PID 1076 wrote to memory of 3540	1076	csrsll.exe	103
PID 1076 wrote to memory of 3540	1076	csrsll.exe	103

C:\Users\Admin\AppData\Local\Temp\3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe
"C:\Users\Admin\AppData\Local\Temp\3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1092
- C:\Users\Admin\AppData\Local\Temp\3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe
  "C:\Users\Admin\AppData\Local\Temp\3813b49e53474788ae0ffc9ef03d8cb9131aa6bffa516bfe2bc81e200a1f405bN.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3728
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\LQVBC.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3512
  - - 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:1768
- - 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:1076
  - - 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:1788
  - - 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:3540

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

Replay Monitor

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Downloads

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

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
90KB

MD5
44dd1757a467963a3f352776b6cad150

SHA1
64330645f30d37239f2b5422c9dfa868d502e646

SHA256
539a77b42648619c854902cb8d33f889c33baf26fca2c09f5716f1c467733534

SHA512
ba68b6d48a00da58073c42b5750f71f91fc07892302cad367cf5a854d4e1773a3c7a4d86d5ed7d8326c2706f5df7addec991ae611966da5eb7954d550d309096

Download Submit
memory/1076-58-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1076-42-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1076-36-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1076-43-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1092-6-0x0000000002B80000-0x0000000002B82000-memory.dmp

Filesize
8KB

Download
memory/1092-5-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1092-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1092-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1092-4-0x0000000002310000-0x0000000002312000-memory.dmp

Filesize
8KB

Download
memory/1092-3-0x0000000002300000-0x0000000002302000-memory.dmp

Filesize
8KB

Download
memory/1092-40-0x0000000002320000-0x0000000002322000-memory.dmp

Filesize
8KB

Download
memory/1788-63-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3540-54-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3540-47-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3540-52-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3540-56-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3540-59-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3540-64-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3728-41-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3728-13-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3728-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3728-62-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3728-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download