modiloader | b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
22-11-2024 03:12

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General

Target

b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe
Size

90KB
MD5

daf937a2c3b0990ac130e81d8aafebd3
SHA1

0c3a5eefe5c901bfa05db74b8e085ae2a8e29700
SHA256

b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726
SHA512

3b069f586c0dcc27cb154790807ad6c43a81e83f2b8d427e1e339ac4d09b08508656c51254d06550970b01372fc140cbbb3ee5ea58aa4444646ee09b0f74f2d0
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/2240-56-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/2240-59-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/2240-58-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/2240-64-0x0000000000400000-0x0000000000414000-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:

b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe

Executes dropped EXE 3 IoCs

Processes:

csrsll.execsrsll.execsrsll.exe

pid	Process
3188	csrsll.exe
3600	csrsll.exe
2240	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-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Win Pdf = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrsll.exe"	reg.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.execsrsll.exe

description	pid	Process	procid_target
PID 2256 set thread context of 4404	2256	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe	91
PID 3188 set thread context of 3600	3188	csrsll.exe	101
PID 3188 set thread context of 2240	3188	csrsll.exe	102

UPX packed file 20 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2256-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2256-4-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4404-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4404-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2256-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4404-13-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x0008000000023c7c-29.dat	upx
behavioral2/memory/3188-36-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4404-40-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3188-41-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3188-42-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2240-47-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2240-56-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3188-55-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2240-59-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2240-58-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2240-54-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4404-62-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3600-63-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2240-64-0x0000000000400000-0x0000000000414000-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.exeb27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exeb27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.execmd.exereg.execsrsll.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	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.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

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

csrsll.exe

description	pid	Process
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe
Token: SeDebugPrivilege	3600	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exeb27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.execsrsll.execsrsll.exe

pid	Process
2256	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe
4404	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe
3188	csrsll.exe
3600	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

Processes:

b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exeb27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.execmd.execsrsll.exe

description	pid	Process	procid_target
PID 2256 wrote to memory of 4404	2256	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe	91
PID 2256 wrote to memory of 4404	2256	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe	91
PID 2256 wrote to memory of 4404	2256	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe	91
PID 2256 wrote to memory of 4404	2256	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe	91
PID 2256 wrote to memory of 4404	2256	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe	91
PID 2256 wrote to memory of 4404	2256	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe	91
PID 2256 wrote to memory of 4404	2256	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe	91
PID 2256 wrote to memory of 4404	2256	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe	91
PID 4404 wrote to memory of 5048	4404	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe	92
PID 4404 wrote to memory of 5048	4404	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe	92
PID 4404 wrote to memory of 5048	4404	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe	92
PID 5048 wrote to memory of 396	5048	cmd.exe	96
PID 5048 wrote to memory of 396	5048	cmd.exe	96
PID 5048 wrote to memory of 396	5048	cmd.exe	96
PID 4404 wrote to memory of 3188	4404	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe	100
PID 4404 wrote to memory of 3188	4404	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe	100
PID 4404 wrote to memory of 3188	4404	b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe	100
PID 3188 wrote to memory of 3600	3188	csrsll.exe	101
PID 3188 wrote to memory of 3600	3188	csrsll.exe	101
PID 3188 wrote to memory of 3600	3188	csrsll.exe	101
PID 3188 wrote to memory of 3600	3188	csrsll.exe	101
PID 3188 wrote to memory of 3600	3188	csrsll.exe	101
PID 3188 wrote to memory of 3600	3188	csrsll.exe	101
PID 3188 wrote to memory of 3600	3188	csrsll.exe	101
PID 3188 wrote to memory of 3600	3188	csrsll.exe	101
PID 3188 wrote to memory of 2240	3188	csrsll.exe	102
PID 3188 wrote to memory of 2240	3188	csrsll.exe	102
PID 3188 wrote to memory of 2240	3188	csrsll.exe	102
PID 3188 wrote to memory of 2240	3188	csrsll.exe	102
PID 3188 wrote to memory of 2240	3188	csrsll.exe	102
PID 3188 wrote to memory of 2240	3188	csrsll.exe	102
PID 3188 wrote to memory of 2240	3188	csrsll.exe	102
PID 3188 wrote to memory of 2240	3188	csrsll.exe	102

C:\Users\Admin\AppData\Local\Temp\b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe
"C:\Users\Admin\AppData\Local\Temp\b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2256
- C:\Users\Admin\AppData\Local\Temp\b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe
  "C:\Users\Admin\AppData\Local\Temp\b27c104a7f28fff90b70f327ba68958f72bf76987dabacc5091059619c67d726.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4404
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\DRHUQ.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:5048
  - - 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:396
- - 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:3188
  - - 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:3600
  - - 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:2240

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\DRHUQ.txt

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
90KB

MD5
f26e2fa71f3cfdb49987e1de04cd8288

SHA1
70c5b264201476e3fce606ea379fb1d44d578195

SHA256
b2826d27cd8ce3be9ffacd8d9748f915af3ecd8ec0d84eb8523065ecb0a9e235

SHA512
2a56d7c6356a51f8b114332fa41cdb127430955cfb774b29e87c3201b2f87a8c68b7f42571a388170774c9220ed2d83f439c31d3ad26ea57e08780daa372c4df

Download Submit
memory/2240-59-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2240-56-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2240-47-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2240-58-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2240-64-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2240-54-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2256-6-0x0000000002330000-0x0000000002332000-memory.dmp

Filesize
8KB

Download
memory/2256-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2256-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2256-5-0x0000000002320000-0x0000000002322000-memory.dmp

Filesize
8KB

Download
memory/2256-4-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2256-3-0x0000000002300000-0x0000000002302000-memory.dmp

Filesize
8KB

Download
memory/3188-36-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3188-41-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3188-42-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3188-55-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3600-63-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4404-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4404-40-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4404-62-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4404-60-0x0000000000410000-0x00000000004D9000-memory.dmp

Filesize
804KB

Download
memory/4404-13-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4404-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download