modiloader | 33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7

Analysis

max time kernel
119s
max time network
119s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
02-11-2024 15:39

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General

Target

33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe
Size

112KB
MD5

51d71b5df09edf390436d7bf32c56030
SHA1

529a5500a71e2f597974a0baa392bfc2585e89d6
SHA256

33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7
SHA512

09b4ce988a363879b0214551ed25ef5f1e471a0d1086b3591f1467edba5641ea5f92b2bead15cb2d74eea5e2ada7d3e7e60f39a10c964efecadd24c3be07fb0f
SSDEEP

1536:XixKqfDCsLcQdMKHUgm2zdfBXBKLzPFsm8UUkM:kKq7HB6WhzdZBKLzPWmEF

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 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4032-47-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4032-50-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4032-55-0x0000000000400000-0x0000000000414000-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:

33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe

Executes dropped EXE 3 IoCs

Processes:

csrsll.execsrsll.execsrsll.exe

pid	Process
3144	csrsll.exe
4756	csrsll.exe
4032	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-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Win Pdf = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrsll.exe"	reg.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.execsrsll.exe

description	pid	Process	procid_target
PID 2392 set thread context of 1020	2392	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe	87
PID 3144 set thread context of 4756	3144	csrsll.exe	95
PID 3144 set thread context of 4032	3144	csrsll.exe	96

UPX packed file 11 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1020-4-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1020-6-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1020-8-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4032-38-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1020-45-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4032-43-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4032-47-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4032-50-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1020-52-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4756-54-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4032-55-0x0000000000400000-0x0000000000414000-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:

cmd.exereg.execsrsll.execsrsll.execsrsll.exe33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe

description	ioc	Process
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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

csrsll.exe

description	pid	Process
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe
Token: SeDebugPrivilege	4756	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.execsrsll.execsrsll.exe

pid	Process
2392	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe
1020	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe
3144	csrsll.exe
4756	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

Processes:

33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.execmd.execsrsll.exe

description	pid	Process	procid_target
PID 2392 wrote to memory of 1020	2392	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe	87
PID 2392 wrote to memory of 1020	2392	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe	87
PID 2392 wrote to memory of 1020	2392	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe	87
PID 2392 wrote to memory of 1020	2392	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe	87
PID 2392 wrote to memory of 1020	2392	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe	87
PID 2392 wrote to memory of 1020	2392	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe	87
PID 2392 wrote to memory of 1020	2392	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe	87
PID 2392 wrote to memory of 1020	2392	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe	87
PID 1020 wrote to memory of 2596	1020	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe	88
PID 1020 wrote to memory of 2596	1020	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe	88
PID 1020 wrote to memory of 2596	1020	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe	88
PID 2596 wrote to memory of 4732	2596	cmd.exe	91
PID 2596 wrote to memory of 4732	2596	cmd.exe	91
PID 2596 wrote to memory of 4732	2596	cmd.exe	91
PID 1020 wrote to memory of 3144	1020	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe	92
PID 1020 wrote to memory of 3144	1020	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe	92
PID 1020 wrote to memory of 3144	1020	33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe	92
PID 3144 wrote to memory of 4756	3144	csrsll.exe	95
PID 3144 wrote to memory of 4756	3144	csrsll.exe	95
PID 3144 wrote to memory of 4756	3144	csrsll.exe	95
PID 3144 wrote to memory of 4756	3144	csrsll.exe	95
PID 3144 wrote to memory of 4756	3144	csrsll.exe	95
PID 3144 wrote to memory of 4756	3144	csrsll.exe	95
PID 3144 wrote to memory of 4756	3144	csrsll.exe	95
PID 3144 wrote to memory of 4756	3144	csrsll.exe	95
PID 3144 wrote to memory of 4032	3144	csrsll.exe	96
PID 3144 wrote to memory of 4032	3144	csrsll.exe	96
PID 3144 wrote to memory of 4032	3144	csrsll.exe	96
PID 3144 wrote to memory of 4032	3144	csrsll.exe	96
PID 3144 wrote to memory of 4032	3144	csrsll.exe	96
PID 3144 wrote to memory of 4032	3144	csrsll.exe	96
PID 3144 wrote to memory of 4032	3144	csrsll.exe	96
PID 3144 wrote to memory of 4032	3144	csrsll.exe	96

C:\Users\Admin\AppData\Local\Temp\33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe
"C:\Users\Admin\AppData\Local\Temp\33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2392
- C:\Users\Admin\AppData\Local\Temp\33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe
  "C:\Users\Admin\AppData\Local\Temp\33ed379a2de172055bff7f06e1ae7306521d5eba424281a90c9398f0690168b7N.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1020
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\RTFJO.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2596
  - - 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:4732
- - 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:3144
  - - 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:4756
  - - 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:4032

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\RTFJO.txt

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
112KB

MD5
250775a5b942a83f4727673fa377a394

SHA1
70ff5073da723da0c94555bba11772e6c309169d

SHA256
3aee5ccaf767300f3be31aa35765510f3887dd78b228bbbf6606babb3c087123

SHA512
689dfa61cf52aaa8754974ec47cfb8e60f889c822a8fd94d22846ab2751e0baaaade0a27777f3e842c7f583c6b1bd619f402ff973e9f67f146b3a456dceb9d8c

Download Submit
memory/1020-45-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1020-4-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1020-6-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1020-8-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1020-52-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2392-3-0x0000000002C50000-0x0000000002C51000-memory.dmp

Filesize
4KB

Download
memory/2392-2-0x00000000022F0000-0x00000000022F1000-memory.dmp

Filesize
4KB

Download
memory/3144-35-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/3144-51-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/3144-34-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4032-38-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4032-43-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4032-47-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4032-50-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4032-55-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4756-54-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download