modiloader | b8c5ba8c40dc151507241d823ce744be244f56df67ef512cea1435abb179d2e8

Analysis

max time kernel
163s
max time network
163s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
09/04/2024, 23:14

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General

Target
af7e11058345a003ae2ee663fd2f7310.exe
Size 90KB
Sample240409-274zpsce9t
SHA256 b8c5ba8c40dc151507241d823ce744be244f56df67ef512cea1435abb179d2e8
MD5 af7e11058345a003ae2ee663fd2f7310
SHA1 0d77c793b94e27b53d8c483e177606d22813a224
SHA512 d0bb88b674ee34aed4f4e04887ad39e13e772cbeb7febbd0316e0dcaffa7935ddc752096a1e80f293551a9f62530748e169f07171bae05af9ee33ac4f5466dbc
SSDEEP 1536:UiYwjQt6QJvzZsgDIWzm/xsXfv+hYhyQQyV5uv4JBrB7w5VRGulTG1ZCL8nj1oDK:0wjZQJvzZsgsW6/Afv+hYfQIm4/rdE3Y
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

modiloader 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 Second Stage 3 IoCs

resource	yara_rule
behavioral2/memory/4332-68-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4332-69-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4332-70-0x0000000000400000-0x0000000000414000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	af7e11058345a003ae2ee663fd2f7310.exe

Executes dropped EXE 3 IoCs

pid	Process
1840	csrsll.exe
4712	csrsll.exe
4332	csrsll.exe

UPX packed file 22 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4944-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4944-1-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4944-5-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4944-9-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/836-14-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/836-16-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/836-18-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4944-17-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/836-23-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/836-28-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/836-32-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x000400000000070f-38.dat	upx
behavioral2/memory/836-45-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1840-47-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1840-51-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4332-57-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1840-64-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4332-67-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4332-68-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4332-69-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4332-70-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/836-72-0x0000000000400000-0x000000000040B000-memory.dmp	upx

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-1-5-21-3808065738-1666277613-1125846146-1000\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 4944 set thread context of 836	4944	af7e11058345a003ae2ee663fd2f7310.exe	97
PID 1840 set thread context of 4712	1840	csrsll.exe	110
PID 1840 set thread context of 4332	1840	csrsll.exe	111

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4712	csrsll.exe
Token: SeDebugPrivilege	4712	csrsll.exe
Token: SeDebugPrivilege	4712	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4944	af7e11058345a003ae2ee663fd2f7310.exe
836	af7e11058345a003ae2ee663fd2f7310.exe
1840	csrsll.exe
4712	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 4944 wrote to memory of 836	4944	af7e11058345a003ae2ee663fd2f7310.exe	97
PID 4944 wrote to memory of 836	4944	af7e11058345a003ae2ee663fd2f7310.exe	97
PID 4944 wrote to memory of 836	4944	af7e11058345a003ae2ee663fd2f7310.exe	97
PID 4944 wrote to memory of 836	4944	af7e11058345a003ae2ee663fd2f7310.exe	97
PID 4944 wrote to memory of 836	4944	af7e11058345a003ae2ee663fd2f7310.exe	97
PID 4944 wrote to memory of 836	4944	af7e11058345a003ae2ee663fd2f7310.exe	97
PID 4944 wrote to memory of 836	4944	af7e11058345a003ae2ee663fd2f7310.exe	97
PID 4944 wrote to memory of 836	4944	af7e11058345a003ae2ee663fd2f7310.exe	97
PID 836 wrote to memory of 1144	836	af7e11058345a003ae2ee663fd2f7310.exe	105
PID 836 wrote to memory of 1144	836	af7e11058345a003ae2ee663fd2f7310.exe	105
PID 836 wrote to memory of 1144	836	af7e11058345a003ae2ee663fd2f7310.exe	105
PID 1144 wrote to memory of 3276	1144	cmd.exe	108
PID 1144 wrote to memory of 3276	1144	cmd.exe	108
PID 1144 wrote to memory of 3276	1144	cmd.exe	108
PID 836 wrote to memory of 1840	836	af7e11058345a003ae2ee663fd2f7310.exe	109
PID 836 wrote to memory of 1840	836	af7e11058345a003ae2ee663fd2f7310.exe	109
PID 836 wrote to memory of 1840	836	af7e11058345a003ae2ee663fd2f7310.exe	109
PID 1840 wrote to memory of 4712	1840	csrsll.exe	110
PID 1840 wrote to memory of 4712	1840	csrsll.exe	110
PID 1840 wrote to memory of 4712	1840	csrsll.exe	110
PID 1840 wrote to memory of 4712	1840	csrsll.exe	110
PID 1840 wrote to memory of 4712	1840	csrsll.exe	110
PID 1840 wrote to memory of 4712	1840	csrsll.exe	110
PID 1840 wrote to memory of 4712	1840	csrsll.exe	110
PID 1840 wrote to memory of 4712	1840	csrsll.exe	110
PID 1840 wrote to memory of 4332	1840	csrsll.exe	111
PID 1840 wrote to memory of 4332	1840	csrsll.exe	111
PID 1840 wrote to memory of 4332	1840	csrsll.exe	111
PID 1840 wrote to memory of 4332	1840	csrsll.exe	111
PID 1840 wrote to memory of 4332	1840	csrsll.exe	111
PID 1840 wrote to memory of 4332	1840	csrsll.exe	111
PID 1840 wrote to memory of 4332	1840	csrsll.exe	111
PID 1840 wrote to memory of 4332	1840	csrsll.exe	111

C:\Users\Admin\AppData\Local\Temp\af7e11058345a003ae2ee663fd2f7310.exe
"C:\Users\Admin\AppData\Local\Temp\af7e11058345a003ae2ee663fd2f7310.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4944
- C:\Users\Admin\AppData\Local\Temp\af7e11058345a003ae2ee663fd2f7310.exe
  "C:\Users\Admin\AppData\Local\Temp\af7e11058345a003ae2ee663fd2f7310.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:836
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\MUISJ.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1144
  - - 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
      PID:3276
- - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1840
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:4712
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
      4⤵
      Executes dropped EXE
      PID:4332

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3920 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8
1⤵
PID:4344

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

MUISJ.txt

Path C:\Users\Admin\AppData\Local\Temp\MUISJ.txt
Size 145B
SHA256 08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff
MD5 4eb61ec7816c34ec8c125acadc57ec1b
SHA1 b0015cc865c0bb1a027be663027d3829401a31cc
SHA512 f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1
MD5 SHA1 SHA512

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csrsll.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
Size 90KB
SHA256 952f3f7eceb683fe50e2c595757cfe1b962292db4e0c2245d717c42b04b2763f
MD5 3e4431b443737493a96b2c8161464c6f
SHA1 425c19a31c4bf24993f79eaf178bb2c2c512dcc3
SHA512 563cb6ec92830ddb8c271f30db2e014c56a562efe1305cffc4ef8b30db18a39fad007e296afe3b24ee63b1ffd44f9fee611f237c4956fb40a2418505a6aa1ec8
SSDEEP 1536:UiYwjQt6QJvzZsgDIWzm/xsXfv+hYhyQQyV5uv4JBrB7w5VRGulTG1ZCL8nj1oDK:0wjZQJvzZsgsW6/Afv+hYfQIm4/rdE3Y
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/836-32-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/836-23-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/836-72-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/836-71-0x0000000000410000-0x00000000004D9000-memory.dmp

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memory/836-45-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/836-14-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/836-16-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/836-18-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/836-28-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/1840-64-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/1840-51-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/1840-59-0x0000000002270000-0x0000000002272000-memory.dmp

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memory/1840-47-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/1840-53-0x00000000021C0000-0x00000000021C2000-memory.dmp

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memory/1840-52-0x00000000021A0000-0x00000000021A2000-memory.dmp

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memory/1840-54-0x00000000021E0000-0x00000000021E2000-memory.dmp

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memory/4332-67-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/4332-70-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/4332-69-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/4332-68-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/4332-57-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/4944-0-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/4944-5-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/4944-17-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/4944-13-0x0000000000A00000-0x0000000000A02000-memory.dmp

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memory/4944-1-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/4944-9-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/4944-12-0x00000000009F0000-0x00000000009F2000-memory.dmp

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memory/4944-11-0x00000000009D0000-0x00000000009D2000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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