modiloader | b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abf

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
01/12/2024, 10:51

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General

Target

b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe
Size

90KB
MD5

b581236bd422bebc8c82f8a242632980
SHA1

1cf31cbb7db115c54f0ccab8c1dd508ba52593eb
SHA256

b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abf
SHA512

d564f831d4923902e6d2688a9e37d2b8dc01eac5640bea438bf43e09630544aa6ba5ba5604de7bbc366a38bbba2d7779254e7df1fb467471d67e79fd769ca94e
SSDEEP

1536:UiYwjQt6QJvzZsgDIWzm/xsXfv+hYhyQQyV5uv4JBrB7w5VRGulTG1ZCL8nj1oDz:0wjZQJvzZsgsW6/Afv+hYfQIm4/rdE39

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/2436-54-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/2436-55-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/2436-52-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/2436-61-0x0000000000400000-0x0000000000414000-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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe

Executes dropped EXE 3 IoCs

pid	Process
2928	csrsll.exe
2608	csrsll.exe
2436	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-1-5-21-3442511616-637977696-3186306149-1000\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 4004 set thread context of 532	4004	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe	86
PID 2928 set thread context of 2608	2928	csrsll.exe	95
PID 2928 set thread context of 2436	2928	csrsll.exe	96

UPX packed file 19 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4004-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4004-5-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/532-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/532-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/532-11-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4004-14-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/files/0x0009000000023bd9-29.dat	upx
behavioral2/memory/532-39-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2928-40-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2928-41-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2436-46-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2436-50-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2436-54-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2436-55-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2928-56-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2436-52-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/532-59-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2608-60-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2436-61-0x0000000000400000-0x0000000000414000-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	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe
Token: SeDebugPrivilege	2608	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4004	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe
532	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe
2928	csrsll.exe
2608	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 4004 wrote to memory of 532	4004	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe	86
PID 4004 wrote to memory of 532	4004	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe	86
PID 4004 wrote to memory of 532	4004	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe	86
PID 4004 wrote to memory of 532	4004	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe	86
PID 4004 wrote to memory of 532	4004	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe	86
PID 4004 wrote to memory of 532	4004	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe	86
PID 4004 wrote to memory of 532	4004	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe	86
PID 4004 wrote to memory of 532	4004	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe	86
PID 532 wrote to memory of 3012	532	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe	87
PID 532 wrote to memory of 3012	532	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe	87
PID 532 wrote to memory of 3012	532	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe	87
PID 3012 wrote to memory of 1896	3012	cmd.exe	90
PID 3012 wrote to memory of 1896	3012	cmd.exe	90
PID 3012 wrote to memory of 1896	3012	cmd.exe	90
PID 532 wrote to memory of 2928	532	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe	91
PID 532 wrote to memory of 2928	532	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe	91
PID 532 wrote to memory of 2928	532	b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe	91
PID 2928 wrote to memory of 2608	2928	csrsll.exe	95
PID 2928 wrote to memory of 2608	2928	csrsll.exe	95
PID 2928 wrote to memory of 2608	2928	csrsll.exe	95
PID 2928 wrote to memory of 2608	2928	csrsll.exe	95
PID 2928 wrote to memory of 2608	2928	csrsll.exe	95
PID 2928 wrote to memory of 2608	2928	csrsll.exe	95
PID 2928 wrote to memory of 2608	2928	csrsll.exe	95
PID 2928 wrote to memory of 2608	2928	csrsll.exe	95
PID 2928 wrote to memory of 2436	2928	csrsll.exe	96
PID 2928 wrote to memory of 2436	2928	csrsll.exe	96
PID 2928 wrote to memory of 2436	2928	csrsll.exe	96
PID 2928 wrote to memory of 2436	2928	csrsll.exe	96
PID 2928 wrote to memory of 2436	2928	csrsll.exe	96
PID 2928 wrote to memory of 2436	2928	csrsll.exe	96
PID 2928 wrote to memory of 2436	2928	csrsll.exe	96
PID 2928 wrote to memory of 2436	2928	csrsll.exe	96

C:\Users\Admin\AppData\Local\Temp\b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe
"C:\Users\Admin\AppData\Local\Temp\b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4004
- C:\Users\Admin\AppData\Local\Temp\b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe
  "C:\Users\Admin\AppData\Local\Temp\b31b7f28ad485f2d38b313c41964ee9d89014e4f2e08941a2f59a06fed8f0abfN.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:532
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\CHXYV.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3012
  - - 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:1896
- - 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:2928
  - - 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:2608
  - - 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:2436

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\CHXYV.txt

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
90KB

MD5
4621a081d28d7c30585c691d98a25dd3

SHA1
3563f3bde08452a30ed9c19b52d45bd5c073a12d

SHA256
861df8a8ec61113bbbdb80e84a5d6769f6e031229ef0716edd8de23fd2a12d0c

SHA512
1a7a6e096a37d5fbef556536c321bbe8907c69b6a9cf0b8a92509f359a4eb2ea32d766e86632acaeef29637945a9a594b159f26f2302513d233263b05bc3048f

Download Submit
memory/532-59-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/532-57-0x0000000000410000-0x00000000004D9000-memory.dmp

Filesize
804KB

Download
memory/532-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/532-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/532-11-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/532-39-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2436-50-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2436-52-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2436-61-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2436-55-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2436-54-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2436-46-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2608-60-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2928-40-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2928-41-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2928-56-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4004-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4004-14-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4004-6-0x0000000002300000-0x0000000002302000-memory.dmp

Filesize
8KB

Download
memory/4004-5-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4004-4-0x00000000022E0000-0x00000000022E2000-memory.dmp

Filesize
8KB

Download
memory/4004-3-0x00000000022D0000-0x00000000022D2000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads