modiloader | b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09b

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
05-12-2024 14:32

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General

Target

b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe
Size

90KB
MD5

0346327d1efe41a3bab7acfa1895e570
SHA1

e1dba79b86fb2c5f4b696bb1923d1801ec546ff1
SHA256

b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09b
SHA512

f4ec455f632a52ca3e646c94a4141e9c0f95c03945ce9f1fd03c30aa6d4e015f396a92c99121305be50beaff5c1d25b22b24bf93317fd43f9c99d9de2f077eec
SSDEEP

1536:UiYwjQt6QJvzZsgDIWzm/xsXfv+hYhyQQyV5uv4JBrB7w5VRGulTG1ZCL8nj1oDT:0wjZQJvzZsgsW6/Afv+hYfQIm4/rdE3d

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/3688-51-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3688-54-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3688-53-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3688-59-0x0000000000400000-0x0000000000414000-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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe

Executes dropped EXE 3 IoCs

pid	Process
4616	csrsll.exe
4584	csrsll.exe
3688	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-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Win Pdf = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrsll.exe"	reg.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 852 set thread context of 3416	852	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe	84
PID 4616 set thread context of 4584	4616	csrsll.exe	95
PID 4616 set thread context of 3688	4616	csrsll.exe	96

UPX packed file 19 IoCs

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

upx

resource	yara_rule
behavioral2/memory/852-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/852-5-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3416-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3416-10-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3416-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/852-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/files/0x0008000000023ca8-28.dat	upx
behavioral2/memory/3416-38-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4616-39-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4616-40-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3688-43-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3688-49-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3688-51-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3688-54-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3688-53-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4616-55-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3416-57-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4584-58-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3688-59-0x0000000000400000-0x0000000000414000-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	csrsll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe
Token: SeDebugPrivilege	4584	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
852	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe
3416	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe
4616	csrsll.exe
4584	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 852 wrote to memory of 3416	852	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe	84
PID 852 wrote to memory of 3416	852	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe	84
PID 852 wrote to memory of 3416	852	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe	84
PID 852 wrote to memory of 3416	852	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe	84
PID 852 wrote to memory of 3416	852	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe	84
PID 852 wrote to memory of 3416	852	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe	84
PID 852 wrote to memory of 3416	852	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe	84
PID 852 wrote to memory of 3416	852	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe	84
PID 3416 wrote to memory of 3984	3416	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe	87
PID 3416 wrote to memory of 3984	3416	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe	87
PID 3416 wrote to memory of 3984	3416	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe	87
PID 3984 wrote to memory of 228	3984	cmd.exe	90
PID 3984 wrote to memory of 228	3984	cmd.exe	90
PID 3984 wrote to memory of 228	3984	cmd.exe	90
PID 3416 wrote to memory of 4616	3416	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe	91
PID 3416 wrote to memory of 4616	3416	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe	91
PID 3416 wrote to memory of 4616	3416	b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe	91
PID 4616 wrote to memory of 4584	4616	csrsll.exe	95
PID 4616 wrote to memory of 4584	4616	csrsll.exe	95
PID 4616 wrote to memory of 4584	4616	csrsll.exe	95
PID 4616 wrote to memory of 4584	4616	csrsll.exe	95
PID 4616 wrote to memory of 4584	4616	csrsll.exe	95
PID 4616 wrote to memory of 4584	4616	csrsll.exe	95
PID 4616 wrote to memory of 4584	4616	csrsll.exe	95
PID 4616 wrote to memory of 4584	4616	csrsll.exe	95
PID 4616 wrote to memory of 3688	4616	csrsll.exe	96
PID 4616 wrote to memory of 3688	4616	csrsll.exe	96
PID 4616 wrote to memory of 3688	4616	csrsll.exe	96
PID 4616 wrote to memory of 3688	4616	csrsll.exe	96
PID 4616 wrote to memory of 3688	4616	csrsll.exe	96
PID 4616 wrote to memory of 3688	4616	csrsll.exe	96
PID 4616 wrote to memory of 3688	4616	csrsll.exe	96
PID 4616 wrote to memory of 3688	4616	csrsll.exe	96

C:\Users\Admin\AppData\Local\Temp\b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe
"C:\Users\Admin\AppData\Local\Temp\b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:852
- C:\Users\Admin\AppData\Local\Temp\b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe
  "C:\Users\Admin\AppData\Local\Temp\b1fc74d040e17299c68f623d8c79a9020d96bff1cad018e6d3f7bcf8f944e09bN.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3416
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\EJYXL.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3984
  - - 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:228
- - 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:4616
  - - 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:4584
  - - 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:3688

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\EJYXL.txt

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
90KB

MD5
0b7da7d3d7c76dd6af03b27fe2bfc481

SHA1
b91ea1cd9d17c248474202393289da1240f87924

SHA256
669f5ef0c32a9faec02f3307554a5a32d92f8d3d716fd406aab561cce4c6e7b7

SHA512
a9dd700283a44582ea46d50628db6247c154bea660a9dedc10a3e771ed50d27e6e1828327321846a94d06ed1c29b3a9d0c3ba86922ae1888079dbf85e79d08f5

Download Submit
memory/852-6-0x0000000002450000-0x0000000002452000-memory.dmp

Filesize
8KB

Download
memory/852-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/852-5-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/852-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/852-4-0x0000000002430000-0x0000000002432000-memory.dmp

Filesize
8KB

Download
memory/852-3-0x0000000002420000-0x0000000002422000-memory.dmp

Filesize
8KB

Download
memory/3416-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3416-10-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3416-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3416-38-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3416-57-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3416-56-0x0000000000410000-0x00000000004D9000-memory.dmp

Filesize
804KB

Download
memory/3688-53-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3688-49-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3688-51-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3688-54-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3688-43-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3688-59-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4584-58-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4616-55-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4616-40-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4616-39-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads