modiloader | b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0

Analysis

max time kernel
120s
max time network
118s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
26-12-2024 07:47

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General

Target

b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe
Size

90KB
MD5

5de31887c9f7bca056d4d09158e8e690
SHA1

ca5aa48cbdddd776e3b2bd7aa5665b8ce47e26fb
SHA256

b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0
SHA512

6d134781d60889eae4001a7a4ee7583d6dd1503d6033ab6685de55753492c3a7a26df761e502b333f15d4b59b50e9349f94f25c79db74d6b9efa48007398d3a2
SSDEEP

1536:UiYwjQt6QJvzZsgDIWzm/xsXfv+hYhyQQyV5uv4JBrB7w5VRGulTG1ZCL8nj1oDW:0wjZQJvzZsgsW6/Afv+hYfQIm4/rdE3c

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/3548-53-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3548-55-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3548-54-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3548-63-0x0000000000400000-0x0000000000414000-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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe

Executes dropped EXE 3 IoCs

pid	Process
336	csrsll.exe
3272	csrsll.exe
3548	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-1-5-21-3756129449-3121373848-4276368241-1000\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 556 set thread context of 1256	556	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe	82
PID 336 set thread context of 3272	336	csrsll.exe	93
PID 336 set thread context of 3548	336	csrsll.exe	94

UPX packed file 19 IoCs

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

upx

resource	yara_rule
behavioral2/memory/556-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/556-5-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1256-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1256-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/556-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1256-13-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x000b000000023bb3-29.dat	upx
behavioral2/memory/1256-39-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/336-40-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/336-41-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3548-51-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3548-45-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3548-53-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1256-61-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/336-58-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3548-55-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3548-54-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3272-62-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3548-63-0x0000000000400000-0x0000000000414000-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	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.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

description	pid	Process
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe
Token: SeDebugPrivilege	3272	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
556	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe
1256	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe
336	csrsll.exe
3272	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 556 wrote to memory of 1256	556	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe	82
PID 556 wrote to memory of 1256	556	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe	82
PID 556 wrote to memory of 1256	556	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe	82
PID 556 wrote to memory of 1256	556	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe	82
PID 556 wrote to memory of 1256	556	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe	82
PID 556 wrote to memory of 1256	556	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe	82
PID 556 wrote to memory of 1256	556	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe	82
PID 556 wrote to memory of 1256	556	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe	82
PID 1256 wrote to memory of 976	1256	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe	83
PID 1256 wrote to memory of 976	1256	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe	83
PID 1256 wrote to memory of 976	1256	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe	83
PID 976 wrote to memory of 3568	976	cmd.exe	86
PID 976 wrote to memory of 3568	976	cmd.exe	86
PID 976 wrote to memory of 3568	976	cmd.exe	86
PID 1256 wrote to memory of 336	1256	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe	87
PID 1256 wrote to memory of 336	1256	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe	87
PID 1256 wrote to memory of 336	1256	b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe	87
PID 336 wrote to memory of 3272	336	csrsll.exe	93
PID 336 wrote to memory of 3272	336	csrsll.exe	93
PID 336 wrote to memory of 3272	336	csrsll.exe	93
PID 336 wrote to memory of 3272	336	csrsll.exe	93
PID 336 wrote to memory of 3272	336	csrsll.exe	93
PID 336 wrote to memory of 3272	336	csrsll.exe	93
PID 336 wrote to memory of 3272	336	csrsll.exe	93
PID 336 wrote to memory of 3272	336	csrsll.exe	93
PID 336 wrote to memory of 3548	336	csrsll.exe	94
PID 336 wrote to memory of 3548	336	csrsll.exe	94
PID 336 wrote to memory of 3548	336	csrsll.exe	94
PID 336 wrote to memory of 3548	336	csrsll.exe	94
PID 336 wrote to memory of 3548	336	csrsll.exe	94
PID 336 wrote to memory of 3548	336	csrsll.exe	94
PID 336 wrote to memory of 3548	336	csrsll.exe	94
PID 336 wrote to memory of 3548	336	csrsll.exe	94

C:\Users\Admin\AppData\Local\Temp\b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe
"C:\Users\Admin\AppData\Local\Temp\b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:556
- C:\Users\Admin\AppData\Local\Temp\b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe
  "C:\Users\Admin\AppData\Local\Temp\b1a37e6162c0e6c435eda40ea39b422cd033c0ed8394fe3aee6f7283d4cb1ab0N.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1256
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\WDMWU.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:976
  - - 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:3568
- - 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:336
  - - 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:3272
  - - 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:3548

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\WDMWU.txt

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
90KB

MD5
b9023a252df4f186a1e582d6b2005858

SHA1
2c03ba5e8fd36cec94a0447cd52e4d2f00e24f61

SHA256
bdf5572e73d4599987acd7e846c38a62d27c512dc88bcde192dda70220afb370

SHA512
378909ae8ef781fad0ac27458e1507d954ac1d35de79398900d1e5519b2e5e58ea6dfff9389bcf87ce992af5ee6766f07c8e9df987073d52066d3e56c7dff50b

Download Submit
memory/336-40-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/336-58-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/336-41-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/556-3-0x0000000002300000-0x0000000002302000-memory.dmp

Filesize
8KB

Download
memory/556-4-0x0000000002310000-0x0000000002312000-memory.dmp

Filesize
8KB

Download
memory/556-6-0x0000000002340000-0x0000000002342000-memory.dmp

Filesize
8KB

Download
memory/556-5-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/556-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/556-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1256-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1256-39-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1256-13-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1256-61-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1256-59-0x0000000000410000-0x00000000004D9000-memory.dmp

Filesize
804KB

Download
memory/1256-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3272-62-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3548-51-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3548-45-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3548-53-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3548-55-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3548-54-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3548-63-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads