modiloader | 38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
02/12/2024, 06:32

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General

Target

38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe
Size

90KB
MD5

29158863a6629d66282e0aad9987b6a3
SHA1

d3440b2c02f601dc2995ef2f452314eb3a9b36b0
SHA256

38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4
SHA512

7392d787f1e287307619b34a17a0db40e3a9ce062b20d853279e2f6b82c0b33bfd38bc3d94eaa128c8712df8db534184977eeb4a4d0b0d76d1f6150c411d4123
SSDEEP

1536:UiYwjQt6QJvzZsgDIWzm/xsXfv+hYhyQQyV5uv4JBrB7w5VRGulTG1ZCL8nj1oDQ:0wjZQJvzZsgsW6/Afv+hYfQIm4/rdE36

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/956-53-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/956-51-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/956-54-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/956-62-0x0000000000400000-0x0000000000414000-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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe

Executes dropped EXE 3 IoCs

pid	Process
4960	csrsll.exe
2372	csrsll.exe
956	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-1-5-21-2437139445-1151884604-3026847218-1000\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 2088 set thread context of 2500	2088	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe	86
PID 4960 set thread context of 2372	4960	csrsll.exe	102
PID 4960 set thread context of 956	4960	csrsll.exe	103

UPX packed file 19 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2088-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2088-4-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2500-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2500-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2088-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2500-13-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x0008000000023cc1-29.dat	upx
behavioral2/memory/2500-39-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4960-41-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4960-40-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/956-47-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/956-50-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/956-53-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/956-51-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/956-54-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4960-57-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2500-60-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2372-61-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/956-62-0x0000000000400000-0x0000000000414000-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	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.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	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe
Token: SeDebugPrivilege	2372	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
2088	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe
2500	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe
4960	csrsll.exe
2372	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 2088 wrote to memory of 2500	2088	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe	86
PID 2088 wrote to memory of 2500	2088	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe	86
PID 2088 wrote to memory of 2500	2088	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe	86
PID 2088 wrote to memory of 2500	2088	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe	86
PID 2088 wrote to memory of 2500	2088	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe	86
PID 2088 wrote to memory of 2500	2088	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe	86
PID 2088 wrote to memory of 2500	2088	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe	86
PID 2088 wrote to memory of 2500	2088	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe	86
PID 2500 wrote to memory of 3312	2500	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe	91
PID 2500 wrote to memory of 3312	2500	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe	91
PID 2500 wrote to memory of 3312	2500	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe	91
PID 3312 wrote to memory of 2308	3312	cmd.exe	95
PID 3312 wrote to memory of 2308	3312	cmd.exe	95
PID 3312 wrote to memory of 2308	3312	cmd.exe	95
PID 2500 wrote to memory of 4960	2500	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe	96
PID 2500 wrote to memory of 4960	2500	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe	96
PID 2500 wrote to memory of 4960	2500	38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe	96
PID 4960 wrote to memory of 2372	4960	csrsll.exe	102
PID 4960 wrote to memory of 2372	4960	csrsll.exe	102
PID 4960 wrote to memory of 2372	4960	csrsll.exe	102
PID 4960 wrote to memory of 2372	4960	csrsll.exe	102
PID 4960 wrote to memory of 2372	4960	csrsll.exe	102
PID 4960 wrote to memory of 2372	4960	csrsll.exe	102
PID 4960 wrote to memory of 2372	4960	csrsll.exe	102
PID 4960 wrote to memory of 2372	4960	csrsll.exe	102
PID 4960 wrote to memory of 956	4960	csrsll.exe	103
PID 4960 wrote to memory of 956	4960	csrsll.exe	103
PID 4960 wrote to memory of 956	4960	csrsll.exe	103
PID 4960 wrote to memory of 956	4960	csrsll.exe	103
PID 4960 wrote to memory of 956	4960	csrsll.exe	103
PID 4960 wrote to memory of 956	4960	csrsll.exe	103
PID 4960 wrote to memory of 956	4960	csrsll.exe	103
PID 4960 wrote to memory of 956	4960	csrsll.exe	103

C:\Users\Admin\AppData\Local\Temp\38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe
"C:\Users\Admin\AppData\Local\Temp\38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2088
- C:\Users\Admin\AppData\Local\Temp\38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe
  "C:\Users\Admin\AppData\Local\Temp\38fe8baeea5c18cf66ea96cb95df89c9e13c35074d34aa00cf29862d328953d4.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2500
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\KYUSC.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3312
  - - 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:2308
- - 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:4960
  - - 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:2372
  - - 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:956

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\KYUSC.txt

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
90KB

MD5
2f7a7cfe78180cc6c4c4f7113b1db582

SHA1
f29c029f7e745ebc2a15fd03009f77ca5e5ce510

SHA256
1c3a1cc7c5b018229a6977e38cefaf690e744c35216c6b4db886b51043301b51

SHA512
faa7af63e7a1c8d26224166333ba572465dc13b4b8305019ceb8bd62d5a078cdb7d0d048b0f998a0db9094ef424eab546bde45a419faa398a296baba9f627fd1

Download Submit
memory/956-50-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/956-62-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/956-54-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/956-51-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/956-53-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/956-47-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2088-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2088-6-0x0000000002200000-0x0000000002202000-memory.dmp

Filesize
8KB

Download
memory/2088-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2088-4-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2088-5-0x00000000021F0000-0x00000000021F2000-memory.dmp

Filesize
8KB

Download
memory/2088-3-0x00000000021D0000-0x00000000021D2000-memory.dmp

Filesize
8KB

Download
memory/2372-61-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2500-13-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2500-39-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2500-60-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2500-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2500-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4960-40-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4960-41-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4960-57-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads