modiloader | 4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
01/05/2024, 21:36

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General

Target
4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe
Size 326KB
Sample240501-1f183agg8w
SHA256 4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c
MD5 61846413a7df2941ff8a7a1f890a7cc0
SHA1 c17c0fff983a7f774056666195e49a9c02168e6a
SHA512 9aa7980ec32c34f666918b87885422645859442b8da09196b1adf1c1edcba24c623da73367dc0707cf106ea111b06a709a6c1ff7c77ee377082757452b68c704
SSDEEP 3072:Ie2A0wxDqUpM5scww4chO+O1BmP5DG0sg3i4XZ9WvDZHwdRX/L+gP38XV:IsxD5cwohO+O1sVG0/pZ6iPC8
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

Detects Windows executables referencing non-Windows User-Agents 4 IoCs

resource	yara_rule
behavioral2/memory/1032-48-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/1032-47-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/1032-51-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/1032-55-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

ModiLoader Second Stage 4 IoCs

resource	yara_rule
behavioral2/memory/1032-48-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/1032-47-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/1032-51-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/1032-55-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2

UPX dump on OEP (original entry point) 16 IoCs

resource	yara_rule
behavioral2/memory/5004-0-0x0000000000400000-0x0000000000454000-memory.dmp	UPX
behavioral2/memory/4612-3-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/4612-9-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/4612-8-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/5004-11-0x0000000000400000-0x0000000000454000-memory.dmp	UPX
behavioral2/files/0x000a000000023383-26.dat	UPX
behavioral2/memory/2864-34-0x0000000000400000-0x0000000000454000-memory.dmp	UPX
behavioral2/memory/1032-39-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/1032-45-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/1032-48-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/1032-47-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/1032-51-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/2864-46-0x0000000000400000-0x0000000000454000-memory.dmp	UPX
behavioral2/memory/4612-52-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/3884-54-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/1032-55-0x0000000000400000-0x0000000000414000-memory.dmp	UPX

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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe

Executes dropped EXE 3 IoCs

pid	Process
2864	csrsll.exe
3884	csrsll.exe
1032	csrsll.exe

UPX packed file 17 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5004-0-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral2/memory/4612-3-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4612-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4612-8-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/5004-6-0x00000000021F0000-0x00000000021F2000-memory.dmp	upx
behavioral2/memory/5004-11-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral2/files/0x000a000000023383-26.dat	upx
behavioral2/memory/2864-34-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral2/memory/1032-39-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1032-45-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1032-48-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1032-47-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1032-51-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2864-46-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral2/memory/4612-52-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3884-54-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1032-55-0x0000000000400000-0x0000000000414000-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-1-5-21-1162180587-977231257-2194346871-1000\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 5004 set thread context of 4612	5004	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe	85
PID 2864 set thread context of 3884	2864	csrsll.exe	91
PID 2864 set thread context of 1032	2864	csrsll.exe	92

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe
Token: SeDebugPrivilege	3884	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
5004	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe
4612	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe
2864	csrsll.exe
3884	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 5004 wrote to memory of 4612	5004	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe	85
PID 5004 wrote to memory of 4612	5004	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe	85
PID 5004 wrote to memory of 4612	5004	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe	85
PID 5004 wrote to memory of 4612	5004	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe	85
PID 5004 wrote to memory of 4612	5004	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe	85
PID 5004 wrote to memory of 4612	5004	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe	85
PID 5004 wrote to memory of 4612	5004	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe	85
PID 5004 wrote to memory of 4612	5004	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe	85
PID 4612 wrote to memory of 4056	4612	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe	86
PID 4612 wrote to memory of 4056	4612	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe	86
PID 4612 wrote to memory of 4056	4612	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe	86
PID 4056 wrote to memory of 3820	4056	cmd.exe	89
PID 4056 wrote to memory of 3820	4056	cmd.exe	89
PID 4056 wrote to memory of 3820	4056	cmd.exe	89
PID 4612 wrote to memory of 2864	4612	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe	90
PID 4612 wrote to memory of 2864	4612	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe	90
PID 4612 wrote to memory of 2864	4612	4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe	90
PID 2864 wrote to memory of 3884	2864	csrsll.exe	91
PID 2864 wrote to memory of 3884	2864	csrsll.exe	91
PID 2864 wrote to memory of 3884	2864	csrsll.exe	91
PID 2864 wrote to memory of 3884	2864	csrsll.exe	91
PID 2864 wrote to memory of 3884	2864	csrsll.exe	91
PID 2864 wrote to memory of 3884	2864	csrsll.exe	91
PID 2864 wrote to memory of 3884	2864	csrsll.exe	91
PID 2864 wrote to memory of 3884	2864	csrsll.exe	91
PID 2864 wrote to memory of 1032	2864	csrsll.exe	92
PID 2864 wrote to memory of 1032	2864	csrsll.exe	92
PID 2864 wrote to memory of 1032	2864	csrsll.exe	92
PID 2864 wrote to memory of 1032	2864	csrsll.exe	92
PID 2864 wrote to memory of 1032	2864	csrsll.exe	92
PID 2864 wrote to memory of 1032	2864	csrsll.exe	92
PID 2864 wrote to memory of 1032	2864	csrsll.exe	92
PID 2864 wrote to memory of 1032	2864	csrsll.exe	92

C:\Users\Admin\AppData\Local\Temp\4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe
"C:\Users\Admin\AppData\Local\Temp\4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5004
- C:\Users\Admin\AppData\Local\Temp\4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe
  "C:\Users\Admin\AppData\Local\Temp\4f8557b1a9f34a4d689d7a62dba2334b30e30d4df6f1a61711fd9bb09a76a65c.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4612
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\SRDLC.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4056
  - - 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:3820
- - 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:2864
  - - 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:3884
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
      4⤵
      Executes dropped EXE
      PID:1032

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

SRDLC.txt

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

Submit Download

csrsll.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
Size 326KB
SHA256 f1415c9a65bea686ac933f5b397a269dccd1bd79bf45c09773332ec90921253c
MD5 ce1b456c4dfdafb9dd458ec8fce6ab59
SHA1 df4a0690ff01408ab7b46f026e8ea36d7bdfd562
SHA512 f34f6ac04c67d47d3c812c25bb3b68cc9de84417222ed18f0c3eca6cc230bb464efdbfbfc17f380302bdc3dba3c3a7cb7f3e7c74d95350ebec1792484497725b
SSDEEP 3072:Ie2A0wxDqUpM5scww4chO+O1BmP5DG0sg3i4XZ9WvDZHwdRX/L+gP38XV:IsxD5cwohO+O1sVG0/pZ6iPC8
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1032-55-0x0000000000400000-0x0000000000414000-memory.dmp

Download

memory/1032-51-0x0000000000400000-0x0000000000414000-memory.dmp

Download

memory/1032-47-0x0000000000400000-0x0000000000414000-memory.dmp

Download

memory/1032-48-0x0000000000400000-0x0000000000414000-memory.dmp

Download

memory/1032-45-0x0000000000400000-0x0000000000414000-memory.dmp

Download

memory/1032-39-0x0000000000400000-0x0000000000414000-memory.dmp

Download

memory/2864-34-0x0000000000400000-0x0000000000454000-memory.dmp

Download

memory/2864-46-0x0000000000400000-0x0000000000454000-memory.dmp

Download

memory/3884-54-0x0000000000400000-0x000000000040B000-memory.dmp

Download

memory/4612-8-0x0000000000400000-0x000000000040B000-memory.dmp

Download

memory/4612-9-0x0000000000400000-0x000000000040B000-memory.dmp

Download

memory/4612-52-0x0000000000400000-0x000000000040B000-memory.dmp

Download

memory/4612-3-0x0000000000400000-0x000000000040B000-memory.dmp

Download

memory/5004-11-0x0000000000400000-0x0000000000454000-memory.dmp

Download

memory/5004-0-0x0000000000400000-0x0000000000454000-memory.dmp

Download

memory/5004-4-0x00000000021C0000-0x00000000021C2000-memory.dmp

Download

memory/5004-5-0x00000000021E0000-0x00000000021E2000-memory.dmp

Download

memory/5004-6-0x00000000021F0000-0x00000000021F2000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads