ddfef0213782794bccb2d0c7d3a200edf49bdc29da491573a0746e9c3664c773

Analysis

max time kernel
142s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20250610-en
resource tags

arch:x64arch:x86image:win10v2004-20250610-enlocale:en-usos:windows10-2004-x64system
submitted
02/07/2025, 02:04

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General

Target
ddfef0213782794bccb2d0c7d3a200edf49bdc29da491573a0746e9c3664c773.exe
Size 76KB
Sample250702-chsspser3x
SHA256 ddfef0213782794bccb2d0c7d3a200edf49bdc29da491573a0746e9c3664c773
MD5 7e41ca734bd7dfd5f568284f5fe7dd1d
SHA1 5abfab7990456e10501036f47b9f80a85388e830
SHA512 4b3acdd1827aedd7533dcf8981cf83ed77db0c747cc9d878977d54815812eb4cddb24fcf55e7d489094a754dc5878487018d7a88e696e5a72643a0f65647c3e3
SSDEEP 1536:5L5lxcQxgr9BcXzfGQz0/m4QdQiWC378JztYtfBpf4p7WtX4:blSQxgr9eXzd4/mxKIm+t3JI
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

aspackv2 bootkit discovery persistence spyware stealer

Malware Config

Signatures

Blocklisted process makes network request 14 IoCs

flow	pid	Process
23	4868	rundll32.exe
24	4868	rundll32.exe
25	4868	rundll32.exe
26	4868	rundll32.exe
32	4868	rundll32.exe
36	4868	rundll32.exe
59	4868	rundll32.exe
60	4868	rundll32.exe
68	4868	rundll32.exe
69	4868	rundll32.exe
70	4868	rundll32.exe
73	4868	rundll32.exe
74	4868	rundll32.exe
75	4868	rundll32.exe

ASPack v2.12-2.42 1 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral1/files/0x000a000000021845-5.dat	aspack_v212_v242

Deletes itself 1 IoCs

pid	Process
4756	stxgn.exe

Executes dropped EXE 1 IoCs

pid	Process
4756	stxgn.exe

Loads dropped DLL 2 IoCs

pid	Process
4868	rundll32.exe
1628	rundll32.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

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-1-5-21-3001560346-2020497773-4190896137-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\fimbq\\sgmbm.dll\",GetWindowClass"	rundll32.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe

Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	rundll32.exe
File opened for modification	\??\PHYSICALDRIVE0	rundll32.exe

System Location Discovery: System Language Discovery 1 TTPs 8 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	ddfef0213782794bccb2d0c7d3a200edf49bdc29da491573a0746e9c3664c773.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	stxgn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 4 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2400	cmd.exe
2368	PING.EXE
4032	cmd.exe
4936	PING.EXE

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Runs ping.exe 1 TTPs 2 IoCs

Remote System Discovery

T1018

pid	Process
2368	PING.EXE
4936	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4868	rundll32.exe
4868	rundll32.exe
4868	rundll32.exe
4868	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4868	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
6096	ddfef0213782794bccb2d0c7d3a200edf49bdc29da491573a0746e9c3664c773.exe
4756	stxgn.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 6096 wrote to memory of 2400	6096	ddfef0213782794bccb2d0c7d3a200edf49bdc29da491573a0746e9c3664c773.exe	88
PID 6096 wrote to memory of 2400	6096	ddfef0213782794bccb2d0c7d3a200edf49bdc29da491573a0746e9c3664c773.exe	88
PID 6096 wrote to memory of 2400	6096	ddfef0213782794bccb2d0c7d3a200edf49bdc29da491573a0746e9c3664c773.exe	88
PID 2400 wrote to memory of 2368	2400	cmd.exe	91
PID 2400 wrote to memory of 2368	2400	cmd.exe	91
PID 2400 wrote to memory of 2368	2400	cmd.exe	91
PID 2400 wrote to memory of 4756	2400	cmd.exe	94
PID 2400 wrote to memory of 4756	2400	cmd.exe	94
PID 2400 wrote to memory of 4756	2400	cmd.exe	94
PID 4756 wrote to memory of 4868	4756	stxgn.exe	95
PID 4756 wrote to memory of 4868	4756	stxgn.exe	95
PID 4756 wrote to memory of 4868	4756	stxgn.exe	95
PID 3560 wrote to memory of 1628	3560	cmd.exe	102
PID 3560 wrote to memory of 1628	3560	cmd.exe	102
PID 3560 wrote to memory of 1628	3560	cmd.exe	102
PID 1628 wrote to memory of 4032	1628	rundll32.exe	103
PID 1628 wrote to memory of 4032	1628	rundll32.exe	103
PID 1628 wrote to memory of 4032	1628	rundll32.exe	103
PID 4032 wrote to memory of 4936	4032	cmd.exe	105
PID 4032 wrote to memory of 4936	4032	cmd.exe	105
PID 4032 wrote to memory of 4936	4032	cmd.exe	105

C:\Users\Admin\AppData\Local\Temp\ddfef0213782794bccb2d0c7d3a200edf49bdc29da491573a0746e9c3664c773.exe
"C:\Users\Admin\AppData\Local\Temp\ddfef0213782794bccb2d0c7d3a200edf49bdc29da491573a0746e9c3664c773.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:6096
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\stxgn.exe "C:\Users\Admin\AppData\Local\Temp\ddfef0213782794bccb2d0c7d3a200edf49bdc29da491573a0746e9c3664c773.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2400
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2368
- - \??\c:\stxgn.exe
    c:\stxgn.exe "C:\Users\Admin\AppData\Local\Temp\ddfef0213782794bccb2d0c7d3a200edf49bdc29da491573a0746e9c3664c773.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4756
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\fimbq\sgmbm.dll",GetWindowClass c:\stxgn.exe
      4⤵
      Blocklisted process makes network request
      Loads dropped DLL
      Adds Run key to start application
      Enumerates connected drives
      Writes to the Master Boot Record (MBR)
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4868

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c c:\windows\SysWOW64\rundll32.exe "c:\fimbq\sgmbm.dll",GetWindowClass
1⤵
- Suspicious use of WriteProcessMemory
PID:3560
- \??\c:\windows\SysWOW64\rundll32.exe
  c:\windows\SysWOW64\rundll32.exe "c:\fimbq\sgmbm.dll",GetWindowClass
  2⤵
  - Loads dropped DLL
  - Writes to the Master Boot Record (MBR)
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1628
- - \??\c:\windows\SysWOW64\cmd.exe
    cmd.exe /c ping 127.0.0.1 -n 3&rd /s /q "c:\fimbq"
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:4032
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 3
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:4936

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

stxgn.exe

Path C:\stxgn.exe
Size 76KB
SHA256 9f8e39cb2069e8b071bc41c5d8f141372146fd025380b9cef6dc3745e0b32d81
MD5 b03f66ecb2c01ae7e1e998a36d4ce403
SHA1 b6b6942642dad919cd77901d51f1fce04fc7a8c2
SHA512 0309e9cf281e03d2819b774284c6b33001fd83fde121bcebd7f32dc2be68587d821b9f82fc74f6ff789546cc23bbe7c2d6df872d412f199400bd3532d093a467
SSDEEP 1536:5L5lxcQxgr9BcXzfGQz0/m4QdQiWC378JztYtfBpf4p7WtX4K:blSQxgr9eXzd4/mxKIm+t3JIK
MD5 SHA1 SHA512 SSDEEP

Submit Download

sgmbm.dll

Path \??\c:\fimbq\sgmbm.dll
Size 46KB
SHA256 f57f9e54f4774c2b944fb070ae0c2a02cbb4b7686ab3207544c3ccaff0ff3dd9
MD5 a3fd41430ddcaa55fde840788925406a
SHA1 dbdd87f5c1bbf6a6f44c2e2c4744675d5e4e75c2
SHA512 23109572cfc9a282ea3ec84d93bfe02303d27f365ad2d9f47f6234f91da14c64f80133cc5e49746dfcb65d2454b7e7c13eff59ba4bbc18e09d2fb1c630ba59c9
SSDEEP 768:2sUfnvxs6iLlhpfFPtnQf7kifD/v7yb9Bh7Cb0VQJojZC/xjTk:2sJT1qf4W/vub9nnV1jZC/xE
MD5 SHA1 SHA512 SSDEEP

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memory/1628-16-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/1628-17-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4756-7-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4756-10-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4868-13-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4868-14-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/4868-18-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4868-19-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/6096-3-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/6096-1-0x0000000000418000-0x0000000000419000-memory.dmp

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memory/6096-0-0x0000000000400000-0x000000000041A000-memory.dmp

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