94c435103566b7a4da64a0bbed2073724e840fe422e0815fdb6f75149a4d1acb

Analysis

max time kernel
119s
max time network
121s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
11/11/2024, 02:12

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General

Target
94c435103566b7a4da64a0bbed2073724e840fe422e0815fdb6f75149a4d1acb.exe
Size 86KB
Sample241111-cm8pqa1apc
SHA256 94c435103566b7a4da64a0bbed2073724e840fe422e0815fdb6f75149a4d1acb
MD5 12d986cc46b252e279f0bbe66682e3f4
SHA1 6c7171f01699c332e3c5a191b9be02ec47c33511
SHA512 93f428d5628f39bcc8aacdf2da986ab4517c4656ba667ed84d6fae59dc25835b539e47db4f3688019a27cdfcf29ccb62acd5ebfda51515f032706c918befe7e2
SSDEEP 1536:6LxJJlguY/NbvWU2VkWlVvtlqDyKJR40AEEoU2l99:cc/R+U23vtlPR0pT7
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

bootkit discovery persistence spyware stealer upx

Malware Config

Signatures

Blocklisted process makes network request 8 IoCs

flow	pid	Process
16	3296	rundll32.exe
22	3296	rundll32.exe
23	3296	rundll32.exe
24	3296	rundll32.exe
38	3296	rundll32.exe
39	3296	rundll32.exe
43	3296	rundll32.exe
49	3296	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000e000000023b71-13.dat	acprotect

Deletes itself 1 IoCs

pid	Process
4832	yukle.exe

Executes dropped EXE 1 IoCs

pid	Process
4832	yukle.exe

Loads dropped DLL 1 IoCs

pid	Process
3296	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-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\pkbib\\cvdipnizv.dll\",init"	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)	\??\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)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	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

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000e000000023b71-13.dat	upx
behavioral2/memory/3296-14-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/3296-15-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/3296-17-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/3296-19-0x0000000010000000-0x0000000010024000-memory.dmp	upx

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	yukle.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	94c435103566b7a4da64a0bbed2073724e840fe422e0815fdb6f75149a4d1acb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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
2688	cmd.exe
1836	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
1836	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3296	rundll32.exe
3296	rundll32.exe
3296	rundll32.exe
3296	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3296	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4076	94c435103566b7a4da64a0bbed2073724e840fe422e0815fdb6f75149a4d1acb.exe
4832	yukle.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4076 wrote to memory of 2688	4076	94c435103566b7a4da64a0bbed2073724e840fe422e0815fdb6f75149a4d1acb.exe	85
PID 4076 wrote to memory of 2688	4076	94c435103566b7a4da64a0bbed2073724e840fe422e0815fdb6f75149a4d1acb.exe	85
PID 4076 wrote to memory of 2688	4076	94c435103566b7a4da64a0bbed2073724e840fe422e0815fdb6f75149a4d1acb.exe	85
PID 2688 wrote to memory of 1836	2688	cmd.exe	87
PID 2688 wrote to memory of 1836	2688	cmd.exe	87
PID 2688 wrote to memory of 1836	2688	cmd.exe	87
PID 2688 wrote to memory of 4832	2688	cmd.exe	89
PID 2688 wrote to memory of 4832	2688	cmd.exe	89
PID 2688 wrote to memory of 4832	2688	cmd.exe	89
PID 4832 wrote to memory of 3296	4832	yukle.exe	90
PID 4832 wrote to memory of 3296	4832	yukle.exe	90
PID 4832 wrote to memory of 3296	4832	yukle.exe	90

C:\Users\Admin\AppData\Local\Temp\94c435103566b7a4da64a0bbed2073724e840fe422e0815fdb6f75149a4d1acb.exe
"C:\Users\Admin\AppData\Local\Temp\94c435103566b7a4da64a0bbed2073724e840fe422e0815fdb6f75149a4d1acb.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4076
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\yukle.exe "C:\Users\Admin\AppData\Local\Temp\94c435103566b7a4da64a0bbed2073724e840fe422e0815fdb6f75149a4d1acb.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2688
- - 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:1836
- - \??\c:\yukle.exe
    c:\yukle.exe "C:\Users\Admin\AppData\Local\Temp\94c435103566b7a4da64a0bbed2073724e840fe422e0815fdb6f75149a4d1acb.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4832
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\pkbib\cvdipnizv.dll",init c:\yukle.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:3296

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

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

cvdipnizv.dll

Path C:\pkbib\cvdipnizv.dll
Size 46KB
SHA256 b6bc7902da0250f6ca920b35b222f6a0fe62102caf05d2a1722c4d3b225a0a9e
MD5 42fe886bcb6460f7c2a46e21ecac5da6
SHA1 7d9a1c9fe17121cf61444da965f29e974a95ede2
SHA512 3d1a7dc1d9ca8a4376302ba20df584ad59b98e0d3b18b06b22d7f5a455833ce124e412fc1922a3b704dcbafa31987cda3115c9a71dd6299683502cebae33567c
SSDEEP 768:P60NIyOvlPSGxZ00FBsMT0fdB5h3vU7ExCClpoduUglNgLoR/C:P6e4lP5rvz1Vd8H/C
MD5 SHA1 SHA512 SSDEEP

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yukle.exe

Path C:\yukle.exe
Size 86KB
SHA256 e2fd7972948b8880b9c6b3e4a0278edbc0e58f0c39f5cd1e004489539c764f79
MD5 931af30e40da8756e7a3beacdb4cc4de
SHA1 d26729fab15c12b9536d3865eaefa93e9a73b686
SHA512 2f5e141ba98276da53b1fe67e608bbd675ffccc2bc96d4c07d8e04c56dd196eb4f756d431d3f5764da2ec7b8aea5d8c87942c16d8b9d815d7734a0cb5d284570
SSDEEP 1536:6LxJJlguY/NbvWU2VkWlVvtlqDyKJR40AEEoU2l97:cc/R+U23vtlPR0pTh
MD5 SHA1 SHA512 SSDEEP

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memory/3296-14-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/3296-15-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/3296-17-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/3296-19-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/4076-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4076-1-0x00000000005A0000-0x00000000005A2000-memory.dmp

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memory/4076-4-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4832-8-0x0000000000550000-0x0000000000552000-memory.dmp

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memory/4832-11-0x0000000000400000-0x0000000000417000-memory.dmp

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