modiloader | b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aaf

Analysis

max time kernel
119s
max time network
120s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
31-12-2024 07:59

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General

Target

b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe
Size

94KB
MD5

885fb7368b6e69b43606acb17abd5cc0
SHA1

4dbbbc8b9c4d3bead424617651844253fd5eb867
SHA256

b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aaf
SHA512

7250ef43084b94232b68deea99104f295b0c4eda359eea465898ea5c9b5ee128e42e7eeec8547121ede28bf8bc31bc35b3f84aaf856dc277ee12ca2405cca9eb
SSDEEP

1536:/pdyL9GjGiwA1z0PmVggNJKbFD2BBMx1RiwmPJr3raDk5BRf13KH9m2POE/:/pdyLALwACPmV3NYaYLiwIt3raA5BRfM

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/2140-54-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/2140-53-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/2140-51-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/2140-60-0x0000000000400000-0x0000000000414000-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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe

Executes dropped EXE 3 IoCs

pid	Process
1500	csrsll.exe
4208	csrsll.exe
2140	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-1-5-21-3227495264-2217614367-4027411560-1000\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 2332 set thread context of 2628	2332	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe	82
PID 1500 set thread context of 4208	1500	csrsll.exe	88
PID 1500 set thread context of 2140	1500	csrsll.exe	89

UPX packed file 19 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2332-0-0x0000000000400000-0x0000000000456000-memory.dmp	upx
behavioral2/memory/2628-5-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2628-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2332-10-0x0000000000400000-0x0000000000456000-memory.dmp	upx
behavioral2/memory/2628-11-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x000c000000023b6b-27.dat	upx
behavioral2/memory/1500-34-0x0000000000400000-0x0000000000456000-memory.dmp	upx
behavioral2/memory/1500-38-0x0000000000400000-0x0000000000456000-memory.dmp	upx
behavioral2/memory/1500-39-0x0000000000400000-0x0000000000456000-memory.dmp	upx
behavioral2/memory/2628-48-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2140-43-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2140-49-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2140-54-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2140-53-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2140-51-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1500-56-0x0000000000400000-0x0000000000456000-memory.dmp	upx
behavioral2/memory/2628-58-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4208-59-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2140-60-0x0000000000400000-0x0000000000414000-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	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.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

description	pid	Process
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe
Token: SeDebugPrivilege	4208	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
2332	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe
2628	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe
1500	csrsll.exe
4208	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 2332 wrote to memory of 2628	2332	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe	82
PID 2332 wrote to memory of 2628	2332	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe	82
PID 2332 wrote to memory of 2628	2332	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe	82
PID 2332 wrote to memory of 2628	2332	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe	82
PID 2332 wrote to memory of 2628	2332	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe	82
PID 2332 wrote to memory of 2628	2332	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe	82
PID 2332 wrote to memory of 2628	2332	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe	82
PID 2332 wrote to memory of 2628	2332	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe	82
PID 2628 wrote to memory of 3100	2628	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe	83
PID 2628 wrote to memory of 3100	2628	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe	83
PID 2628 wrote to memory of 3100	2628	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe	83
PID 3100 wrote to memory of 996	3100	cmd.exe	86
PID 3100 wrote to memory of 996	3100	cmd.exe	86
PID 3100 wrote to memory of 996	3100	cmd.exe	86
PID 2628 wrote to memory of 1500	2628	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe	87
PID 2628 wrote to memory of 1500	2628	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe	87
PID 2628 wrote to memory of 1500	2628	b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe	87
PID 1500 wrote to memory of 4208	1500	csrsll.exe	88
PID 1500 wrote to memory of 4208	1500	csrsll.exe	88
PID 1500 wrote to memory of 4208	1500	csrsll.exe	88
PID 1500 wrote to memory of 4208	1500	csrsll.exe	88
PID 1500 wrote to memory of 4208	1500	csrsll.exe	88
PID 1500 wrote to memory of 4208	1500	csrsll.exe	88
PID 1500 wrote to memory of 4208	1500	csrsll.exe	88
PID 1500 wrote to memory of 4208	1500	csrsll.exe	88
PID 1500 wrote to memory of 2140	1500	csrsll.exe	89
PID 1500 wrote to memory of 2140	1500	csrsll.exe	89
PID 1500 wrote to memory of 2140	1500	csrsll.exe	89
PID 1500 wrote to memory of 2140	1500	csrsll.exe	89
PID 1500 wrote to memory of 2140	1500	csrsll.exe	89
PID 1500 wrote to memory of 2140	1500	csrsll.exe	89
PID 1500 wrote to memory of 2140	1500	csrsll.exe	89
PID 1500 wrote to memory of 2140	1500	csrsll.exe	89

C:\Users\Admin\AppData\Local\Temp\b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe
"C:\Users\Admin\AppData\Local\Temp\b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2332
- C:\Users\Admin\AppData\Local\Temp\b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe
  "C:\Users\Admin\AppData\Local\Temp\b37820e45ab833c1be1fe92a0cef99bc797514153569654b45fe43b896da0aafN.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2628
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\RQCKC.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3100
  - - 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:996
- - 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:1500
  - - 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:4208
  - - 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:2140

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\RQCKC.txt

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
94KB

MD5
ab05d4b1e244236698df3eb41c7bfc87

SHA1
eae691709dbe27f0ed4e5162c410a5b0d87326bd

SHA256
0c1888d7f5bedc124c222d4ce38cc42b6b5aa6b6ff4a14566f8db3b26834e84e

SHA512
dbcbcd4a4b1bbe0ff52c6598eac77b4e02831eaef957f5cfbe1598261de6f67bf7059cf99829402e3ab4d8edbf462b75577f36acd1a49c181d863c98f3e0aad1

Download Submit
memory/1500-56-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/1500-39-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/1500-38-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/1500-34-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/2140-54-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2140-43-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2140-60-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2140-51-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2140-53-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2140-49-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2332-0-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/2332-4-0x0000000002330000-0x0000000002331000-memory.dmp

Filesize
4KB

Download
memory/2332-3-0x0000000002310000-0x0000000002311000-memory.dmp

Filesize
4KB

Download
memory/2332-10-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/2628-48-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2628-11-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2628-5-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2628-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2628-57-0x0000000000410000-0x00000000004D9000-memory.dmp

Filesize
804KB

Download
memory/2628-58-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4208-59-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads