3ad0567ec86d1991ecb0b7a17d491056ea7fe04db42942ce956a724e5ec89838

General

Target

7bd564f1d942266e30c7b875bcdad000N.exe
Size

111KB
MD5

7bd564f1d942266e30c7b875bcdad000
SHA1

a5835e009e6c40f154692bf1a145644a31d60411
SHA256

3ad0567ec86d1991ecb0b7a17d491056ea7fe04db42942ce956a724e5ec89838
SHA512

8fa2df30f942b5b20070985087d9543e0df7e4f1cecc6cd3cc40cfe54b2050bec454fc8da6a2a588e6857201ab47186abdf2fd9ca2ed446ce50ad0b60f0f3b63
SSDEEP

1536:TRiAXaKD5grAhdVA2VukXKzMf3liaL+SWzR+fy1ZZosMiZ7RtEsR:liAXaKDLVaroj6SWzosZGyRtEsR

Score

8^/10

bootkit discovery persistence spyware stealer

Malware Config

Signatures

Blocklisted process makes network request 8 IoCs

flow	pid	Process
7	3348	rundll32.exe
21	3348	rundll32.exe
24	3348	rundll32.exe
25	3348	rundll32.exe
38	3348	rundll32.exe
39	3348	rundll32.exe
51	3348	rundll32.exe
69	3348	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2264	zdjoy.exe

Executes dropped EXE 1 IoCs

pid	Process
2264	zdjoy.exe

Loads dropped DLL 1 IoCs

pid	Process
3348	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-1-5-21-945322488-2060912225-3527527000-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\famfzks\\kkrsd.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)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\e:	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)	\??\n:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\y:	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zdjoy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7bd564f1d942266e30c7b875bcdad000N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
1212	cmd.exe
1060	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
1060	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3348	rundll32.exe
3348	rundll32.exe
3348	rundll32.exe
3348	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3348	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4792	7bd564f1d942266e30c7b875bcdad000N.exe
2264	zdjoy.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4792 wrote to memory of 1212	4792	7bd564f1d942266e30c7b875bcdad000N.exe	86
PID 4792 wrote to memory of 1212	4792	7bd564f1d942266e30c7b875bcdad000N.exe	86
PID 4792 wrote to memory of 1212	4792	7bd564f1d942266e30c7b875bcdad000N.exe	86
PID 1212 wrote to memory of 1060	1212	cmd.exe	88
PID 1212 wrote to memory of 1060	1212	cmd.exe	88
PID 1212 wrote to memory of 1060	1212	cmd.exe	88
PID 1212 wrote to memory of 2264	1212	cmd.exe	90
PID 1212 wrote to memory of 2264	1212	cmd.exe	90
PID 1212 wrote to memory of 2264	1212	cmd.exe	90
PID 2264 wrote to memory of 3348	2264	zdjoy.exe	91
PID 2264 wrote to memory of 3348	2264	zdjoy.exe	91
PID 2264 wrote to memory of 3348	2264	zdjoy.exe	91

C:\Users\Admin\AppData\Local\Temp\7bd564f1d942266e30c7b875bcdad000N.exe
"C:\Users\Admin\AppData\Local\Temp\7bd564f1d942266e30c7b875bcdad000N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4792
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\zdjoy.exe "C:\Users\Admin\AppData\Local\Temp\7bd564f1d942266e30c7b875bcdad000N.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1212
- - 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:1060
- - \??\c:\zdjoy.exe
    c:\zdjoy.exe "C:\Users\Admin\AppData\Local\Temp\7bd564f1d942266e30c7b875bcdad000N.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2264
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\famfzks\kkrsd.dll",GetWindowClass 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:3348

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:\zdjoy.exe

Filesize
111KB

MD5
1043fda94a5a28f106fcc5e3342c7c35

SHA1
c5c5339e7c24fb3fdc34067bad470e5b10f88742

SHA256
e257c5091868fc29de60e3f47531cbe4139add1bd0b93b6ab9fe2d4eec3356b2

SHA512
213f01d752d367bc6c96cc4bc8cc68e1bcb187c4b5cb6350f76b53c6c8e01df4a502b9f4dffb6df8021e24fbe8af33916c4f270f25ae32c00add5f53f2eb83a1

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

Filesize
63KB

MD5
06c39ca503305efbf7274f6bf9394f28

SHA1
bec4daadab49f1f58a951d9cc1b2d7c1e2ae8450

SHA256
19f33ba32f20dae1ea6a6b87824dc8e3e74527b34f9cd01a6e4f67e3e79dd867

SHA512
e6c8b19892b5ce5108909824ad37b0fe0eed2459939f0249133bf3e3c1470308d6d51aa3fbf42aabcbf37bb2412c8a27bff445e23dc0495910ec5f445055d931

Download Submit
memory/2264-7-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/3348-10-0x0000000010000000-0x0000000010036000-memory.dmp

Filesize
216KB

Download
memory/3348-11-0x00000000005A0000-0x00000000005A2000-memory.dmp

Filesize
8KB

Download
memory/3348-12-0x0000000010000000-0x0000000010036000-memory.dmp

Filesize
216KB

Download
memory/3348-13-0x00000000005A0000-0x00000000005A2000-memory.dmp

Filesize
8KB

Download
memory/3348-15-0x0000000010000000-0x0000000010036000-memory.dmp

Filesize
216KB

Download
memory/3348-17-0x0000000010000000-0x0000000010036000-memory.dmp

Filesize
216KB

Download
memory/4792-0-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/4792-2-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads