modiloader | a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616

Analysis

max time kernel
107s
max time network
116s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20-12-2024 03:40

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General

Target

a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe
Size

90KB
MD5

ed635f2310b0ae8702e47c605c2fb8e0
SHA1

de3c77dd9c73f78be2d677df1affa9efd578909e
SHA256

a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616
SHA512

413c412ad23e9aa78fb78d2727056ff27b1bb151ecf36c359aada7cc314c681eb0d07089c87f6e2416922fd127baf4a5571f6f4490bd2391db4243565db8ce64
SSDEEP

1536:UiYwjQt6QJvzZsgDIWzm/xsXfv+hYhyQQyV5uv4JBrB7w5VRGulTG1ZCL8nj1oDR:0wjZQJvzZsgsW6/Afv+hYfQIm4/rdE3z

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/4844-55-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4844-53-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4844-52-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4844-63-0x0000000000400000-0x0000000000414000-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	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe

Executes dropped EXE 3 IoCs

pid	Process
3668	csrsll.exe
2104	csrsll.exe
4844	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 1528 set thread context of 4024	1528	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe	82
PID 3668 set thread context of 2104	3668	csrsll.exe	93
PID 3668 set thread context of 4844	3668	csrsll.exe	94

UPX packed file 19 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1528-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1528-4-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4024-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4024-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1528-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4024-13-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x000b000000023b75-29.dat	upx
behavioral2/memory/4024-39-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3668-40-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4844-55-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4024-61-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3668-58-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4844-53-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4844-52-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4844-51-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4844-45-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3668-41-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2104-62-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4844-63-0x0000000000400000-0x0000000000414000-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	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe

Suspicious use of AdjustPrivilegeToken 59 IoCs

description	pid	Process
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe
Token: SeDebugPrivilege	2104	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
1528	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe
4024	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe
3668	csrsll.exe
2104	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 1528 wrote to memory of 4024	1528	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe	82
PID 1528 wrote to memory of 4024	1528	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe	82
PID 1528 wrote to memory of 4024	1528	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe	82
PID 1528 wrote to memory of 4024	1528	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe	82
PID 1528 wrote to memory of 4024	1528	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe	82
PID 1528 wrote to memory of 4024	1528	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe	82
PID 1528 wrote to memory of 4024	1528	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe	82
PID 1528 wrote to memory of 4024	1528	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe	82
PID 4024 wrote to memory of 4588	4024	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe	83
PID 4024 wrote to memory of 4588	4024	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe	83
PID 4024 wrote to memory of 4588	4024	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe	83
PID 4588 wrote to memory of 1220	4588	cmd.exe	86
PID 4588 wrote to memory of 1220	4588	cmd.exe	86
PID 4588 wrote to memory of 1220	4588	cmd.exe	86
PID 4024 wrote to memory of 3668	4024	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe	87
PID 4024 wrote to memory of 3668	4024	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe	87
PID 4024 wrote to memory of 3668	4024	a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe	87
PID 3668 wrote to memory of 2104	3668	csrsll.exe	93
PID 3668 wrote to memory of 2104	3668	csrsll.exe	93
PID 3668 wrote to memory of 2104	3668	csrsll.exe	93
PID 3668 wrote to memory of 2104	3668	csrsll.exe	93
PID 3668 wrote to memory of 2104	3668	csrsll.exe	93
PID 3668 wrote to memory of 2104	3668	csrsll.exe	93
PID 3668 wrote to memory of 2104	3668	csrsll.exe	93
PID 3668 wrote to memory of 2104	3668	csrsll.exe	93
PID 3668 wrote to memory of 4844	3668	csrsll.exe	94
PID 3668 wrote to memory of 4844	3668	csrsll.exe	94
PID 3668 wrote to memory of 4844	3668	csrsll.exe	94
PID 3668 wrote to memory of 4844	3668	csrsll.exe	94
PID 3668 wrote to memory of 4844	3668	csrsll.exe	94
PID 3668 wrote to memory of 4844	3668	csrsll.exe	94
PID 3668 wrote to memory of 4844	3668	csrsll.exe	94
PID 3668 wrote to memory of 4844	3668	csrsll.exe	94

C:\Users\Admin\AppData\Local\Temp\a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe
"C:\Users\Admin\AppData\Local\Temp\a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1528
- C:\Users\Admin\AppData\Local\Temp\a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe
  "C:\Users\Admin\AppData\Local\Temp\a1f8179c5313fafea1facdc83e7fba6af07e82f97c4abd75f0a5750827fc2616N.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4024
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\YOSXE.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4588
  - - 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:1220
- - 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:3668
  - - 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:2104
  - - 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:4844

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\YOSXE.txt

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
90KB

MD5
525e5bab2b77bdcc3c4962dbe12d2c04

SHA1
3f7d2c577c41cb2961fc364b7130c285e005e872

SHA256
099aa53b454e3c8cfce81e4b440dad93539c5677ae882e90a3080434da3258c1

SHA512
af5b97ab7fb22b1891f03983fecde08b99371620173f3b6dac951e40536b3241b2d5c4849a07b7a247923fb05ff8162909b44faf834e6531ceec22756ead2243

Download Submit
memory/1528-3-0x0000000002300000-0x0000000002302000-memory.dmp

Filesize
8KB

Download
memory/1528-5-0x0000000002320000-0x0000000002322000-memory.dmp

Filesize
8KB

Download
memory/1528-4-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1528-6-0x0000000002330000-0x0000000002332000-memory.dmp

Filesize
8KB

Download
memory/1528-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1528-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2104-62-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3668-40-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3668-41-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3668-58-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4024-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4024-61-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4024-59-0x0000000000410000-0x00000000004D9000-memory.dmp

Filesize
804KB

Download
memory/4024-39-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4024-13-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4024-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4844-55-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4844-53-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4844-52-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4844-51-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4844-45-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4844-63-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads