918269ffe570776beaf8b4a53838d77217b7ff54729b44542d01cc66f31d4396

General

Target

660087b850af88291a2c496edf5d04c0N.exe
Size

79KB
MD5

660087b850af88291a2c496edf5d04c0
SHA1

6c746894bce4042280c790b33640b91575fe1e8f
SHA256

918269ffe570776beaf8b4a53838d77217b7ff54729b44542d01cc66f31d4396
SHA512

f42b15b7a5ab85cf4336feca5ba2c686f4b3aa153b6aae008dbf268d98b1e69c5cff7c0bc3ea564c08b3ea6fa317103613d89742dffcd239d482d2faaaf74c46
SSDEEP

768:qGHV45EDE477AZbUJx0rZGE3jCELoiMMj6hZ3nE+EXVmkDbjRL8Khc15Z6J1SkQ:qG14P477AxUYrZGoC09k0SkTRHhWqPR

Score

8^/10

bootkit discovery persistence spyware stealer

Malware Config

Signatures

Blocklisted process makes network request 3 IoCs

flow	pid	Process
16	3464	rundll32.exe
17	3464	rundll32.exe
18	3464	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3432	zdjoy.exe

Executes dropped EXE 1 IoCs

pid	Process
3432	zdjoy.exe

Loads dropped DLL 1 IoCs

pid	Process
3464	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-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\famfzks\\kkrsd.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)	\??\o:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	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)	\??\q:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\x:	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

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	660087b850af88291a2c496edf5d04c0N.exe
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	zdjoy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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
2776	cmd.exe
4416	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
4416	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3464	rundll32.exe
3464	rundll32.exe
3464	rundll32.exe
3464	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3464	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2368	660087b850af88291a2c496edf5d04c0N.exe
3432	zdjoy.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2368 wrote to memory of 2776	2368	660087b850af88291a2c496edf5d04c0N.exe	86
PID 2368 wrote to memory of 2776	2368	660087b850af88291a2c496edf5d04c0N.exe	86
PID 2368 wrote to memory of 2776	2368	660087b850af88291a2c496edf5d04c0N.exe	86
PID 2776 wrote to memory of 4416	2776	cmd.exe	88
PID 2776 wrote to memory of 4416	2776	cmd.exe	88
PID 2776 wrote to memory of 4416	2776	cmd.exe	88
PID 2776 wrote to memory of 3432	2776	cmd.exe	89
PID 2776 wrote to memory of 3432	2776	cmd.exe	89
PID 2776 wrote to memory of 3432	2776	cmd.exe	89
PID 3432 wrote to memory of 3464	3432	zdjoy.exe	91
PID 3432 wrote to memory of 3464	3432	zdjoy.exe	91
PID 3432 wrote to memory of 3464	3432	zdjoy.exe	91

C:\Users\Admin\AppData\Local\Temp\660087b850af88291a2c496edf5d04c0N.exe
"C:\Users\Admin\AppData\Local\Temp\660087b850af88291a2c496edf5d04c0N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2368
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\zdjoy.exe "C:\Users\Admin\AppData\Local\Temp\660087b850af88291a2c496edf5d04c0N.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2776
- - 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:4416
- - \??\c:\zdjoy.exe
    c:\zdjoy.exe "C:\Users\Admin\AppData\Local\Temp\660087b850af88291a2c496edf5d04c0N.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3432
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\famfzks\kkrsd.dll",init c:\zdjoy.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:3464

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

\??\c:\famfzks\kkrsd.dll

Filesize
42KB

MD5
36e3fb5964d663272cf1169e1e1ca478

SHA1
58115e08b49505bcbbb5c88a28a86222ba18d5d4

SHA256
c7c41689de030df0f78f471422fa2a6383b36e77c94e7f6f124a96feb3e27ed7

SHA512
daff53b11aa400437a06287707a334a09661c1ef7d0fd8beaf1a874c79c16fe45bd1188343d0623e839d3ead5ea2dd90896e37ccf3b252c7220c74989a9ba442

Download Submit
\??\c:\zdjoy.exe

Filesize
79KB

MD5
8b414a47d0872f352945e8da4d9fd992

SHA1
9636e5b1fb63196abf55a5f637a2734258920be7

SHA256
bd55428d65ec13a8924eb7e6732b864e71d0cff6a5d2db3eb9b43415518f3c32

SHA512
5a2d42b25fe9f22438f2e66fef5d79e7d410440182b33d5f1007ace89260783650026d5aaa82f1ca9de10839db97ce4cc62972bd8bf7fb1d737bd553279be1c0

Download Submit
memory/2368-0-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2368-1-0x00000000009F0000-0x00000000009F1000-memory.dmp

Filesize
4KB

Download
memory/2368-3-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/3432-8-0x00000000005F0000-0x00000000005F1000-memory.dmp

Filesize
4KB

Download
memory/3432-7-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/3432-10-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/3464-13-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/3464-14-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/3464-15-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/3464-16-0x0000000000DB0000-0x0000000000DB1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads