5af1d42f2a8baae808881bb057bc7622da75ca7c3a618a1fc73851d90a826de5

Analysis

max time kernel
150s
max time network
136s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
01/09/2024, 08:11

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General

Target

5af1d42f2a8baae808881bb057bc7622da75ca7c3a618a1fc73851d90a826de5.exe
Size

408KB
MD5

92dc7f1bcfa63f4c62bce2c5c3d0d5c6
SHA1

40e07adf840aecc40fce80bf81722aea588d5671
SHA256

5af1d42f2a8baae808881bb057bc7622da75ca7c3a618a1fc73851d90a826de5
SHA512

c78fd447b8ca315298f6065b724e21e32478aa7390885c9dd6bacd36328ef7bb9b0b9a9e070ed3c484cfd8eb22b135cd3aa8ccd9a435dee97bd0ff54c698fb0a
SSDEEP

6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4g:gtRfJcNYFNm8UhlZGseg

Score

8^/10

bootkit discovery persistence spyware stealer

Malware Config

Signatures

Blocklisted process makes network request 8 IoCs

flow	pid	Process
23	3532	rundll32.exe
31	3532	rundll32.exe
32	3532	rundll32.exe
33	3532	rundll32.exe
47	3532	rundll32.exe
51	3532	rundll32.exe
59	3532	rundll32.exe
71	3532	rundll32.exe

Deletes itself 1 IoCs

pid	Process
1180	iuikrmq.exe

Executes dropped EXE 1 IoCs

pid	Process
1180	iuikrmq.exe

Loads dropped DLL 1 IoCs

pid	Process
3532	rundll32.exe

Reads user/profile data of web browsers 2 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

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-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\lmuebohol\\wdwesdm.dll\",Verify"	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)	\??\b:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe

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

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
3532	rundll32.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\lmuebohol	iuikrmq.exe
File created	\??\c:\Program Files\lmuebohol\wdwesdm.dll	iuikrmq.exe

System Location Discovery: System Language Discovery 1 TTPs 5 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iuikrmq.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5af1d42f2a8baae808881bb057bc7622da75ca7c3a618a1fc73851d90a826de5.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2056	cmd.exe
436	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 1 IoCs

Remote System Discovery

T1018

pid	Process
436	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe
3532	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3532	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2648	5af1d42f2a8baae808881bb057bc7622da75ca7c3a618a1fc73851d90a826de5.exe
1180	iuikrmq.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2648 wrote to memory of 2056	2648	5af1d42f2a8baae808881bb057bc7622da75ca7c3a618a1fc73851d90a826de5.exe	92
PID 2648 wrote to memory of 2056	2648	5af1d42f2a8baae808881bb057bc7622da75ca7c3a618a1fc73851d90a826de5.exe	92
PID 2648 wrote to memory of 2056	2648	5af1d42f2a8baae808881bb057bc7622da75ca7c3a618a1fc73851d90a826de5.exe	92
PID 2056 wrote to memory of 436	2056	cmd.exe	94
PID 2056 wrote to memory of 436	2056	cmd.exe	94
PID 2056 wrote to memory of 436	2056	cmd.exe	94
PID 2056 wrote to memory of 1180	2056	cmd.exe	97
PID 2056 wrote to memory of 1180	2056	cmd.exe	97
PID 2056 wrote to memory of 1180	2056	cmd.exe	97
PID 1180 wrote to memory of 3532	1180	iuikrmq.exe	98
PID 1180 wrote to memory of 3532	1180	iuikrmq.exe	98
PID 1180 wrote to memory of 3532	1180	iuikrmq.exe	98

C:\Users\Admin\AppData\Local\Temp\5af1d42f2a8baae808881bb057bc7622da75ca7c3a618a1fc73851d90a826de5.exe
"C:\Users\Admin\AppData\Local\Temp\5af1d42f2a8baae808881bb057bc7622da75ca7c3a618a1fc73851d90a826de5.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2648
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\iuikrmq.exe "C:\Users\Admin\AppData\Local\Temp\5af1d42f2a8baae808881bb057bc7622da75ca7c3a618a1fc73851d90a826de5.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2056
- - 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:436
- - C:\Users\Admin\AppData\Local\Temp\iuikrmq.exe
    C:\Users\Admin\AppData\Local\Temp\\iuikrmq.exe "C:\Users\Admin\AppData\Local\Temp\5af1d42f2a8baae808881bb057bc7622da75ca7c3a618a1fc73851d90a826de5.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1180
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\lmuebohol\wdwesdm.dll",Verify C:\Users\Admin\AppData\Local\Temp\iuikrmq.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)
      Suspicious use of NtSetInformationThreadHideFromDebugger
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3532

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 --field-trial-handle=4048,i,10597648459838880772,16562651767759956329,262144 --variations-seed-version --mojo-platform-channel-handle=4468 /prefetch:8
1⤵
PID:3336

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

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

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

C:\Users\Admin\AppData\Local\Temp\iuikrmq.exe

Filesize
408KB

MD5
bafe9e129ba58499286af997afbc056d

SHA1
3440e015c263f1944559549749a60b0fc2c7f1ac

SHA256
427af9eecbd6c6bd0b514b9f283f4ddd14847913a9de69228fae68074b48c96a

SHA512
12fdd49921b7da387217280e67cb24eff280695deb33778243d91825d377badc017317a4ea6d99c939d464acaf18fb28801dd7e8dae3749ffa27ddf530fcd77f

Download Submit
\??\c:\Program Files\lmuebohol\wdwesdm.dll

Filesize
228KB

MD5
adac2af5203035d8b6d6d5bf2bd054e7

SHA1
eb5907f27a032fd825173bd191bfc82e8a6c4245

SHA256
b8a2b70d308f12c0ea6f1c4110c9e00c10c755e30cbf5e839555c34b9d3de603

SHA512
12e69f4b07f2fd4fd93a575ba8f985f574b297d690ca7fd9e3c012f02462140829a7d2992860a99cef59dcadef0b65c8c43c1293dde3db9beadb04e5680455d0

Download Submit
memory/1180-6-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/1180-8-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2648-0-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2648-2-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/3532-11-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download
memory/3532-12-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download
memory/3532-14-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download