794c20c8d6f3b427552d69a6203d08d4140bffa4de5848ab6f8fda2aefcb24d0

General

Target

794c20c8d6f3b427552d69a6203d08d4140bffa4de5848ab6f8fda2aefcb24d0.exe
Size

396KB
MD5

e9a4ee4501e517a1f0975bbd55737303
SHA1

69ba1b7ba832b0bee2279f8dfcc1a4fd83eefb0f
SHA256

794c20c8d6f3b427552d69a6203d08d4140bffa4de5848ab6f8fda2aefcb24d0
SHA512

c85ec1da78a38be290134d54b3b3cb53a9a636ed0402d851ab401fe436d5bd92d788fd9aa9151894f17854c609f4542b86e0a20cef97684e2ef9ff3e56e9ec15
SSDEEP

12288:vdDU6g13sJd1fm/+yb3O2jg82ydU/DdKumhb:vdE3sJd1fm/+yb3OYg84/JHyb

Score

7^/10

bootkit discovery persistence spyware stealer

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
2628	cqimhswk.exe

Executes dropped EXE 2 IoCs

pid	Process
2628	cqimhswk.exe
2416	ygl.exe

Loads dropped DLL 7 IoCs

pid	Process
1316	cmd.exe
1316	cmd.exe
2628	cqimhswk.exe
2416	ygl.exe
2416	ygl.exe
2416	ygl.exe
2416	ygl.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-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\VIEW = "c:\\Program Files\\aiyhv\\ygl.exe \"c:\\Program Files\\aiyhv\\yglnf.dll\",Viewer"	ygl.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)	\??\y:	ygl.exe
File opened (read-only)	\??\k:	ygl.exe
File opened (read-only)	\??\o:	ygl.exe
File opened (read-only)	\??\q:	ygl.exe
File opened (read-only)	\??\t:	ygl.exe
File opened (read-only)	\??\u:	ygl.exe
File opened (read-only)	\??\r:	ygl.exe
File opened (read-only)	\??\s:	ygl.exe
File opened (read-only)	\??\v:	ygl.exe
File opened (read-only)	\??\g:	ygl.exe
File opened (read-only)	\??\j:	ygl.exe
File opened (read-only)	\??\l:	ygl.exe
File opened (read-only)	\??\m:	ygl.exe
File opened (read-only)	\??\p:	ygl.exe
File opened (read-only)	\??\x:	ygl.exe
File opened (read-only)	\??\a:	ygl.exe
File opened (read-only)	\??\z:	ygl.exe
File opened (read-only)	\??\w:	ygl.exe
File opened (read-only)	\??\b:	ygl.exe
File opened (read-only)	\??\e:	ygl.exe
File opened (read-only)	\??\h:	ygl.exe
File opened (read-only)	\??\i:	ygl.exe
File opened (read-only)	\??\n:	ygl.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	ygl.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\aiyhv\ygl.exe	cqimhswk.exe
File opened for modification	\??\c:\Program Files\aiyhv	cqimhswk.exe
File created	\??\c:\Program Files\aiyhv\yglnf.dll	cqimhswk.exe
File created	\??\c:\Program Files\aiyhv\ygl.exe	cqimhswk.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	794c20c8d6f3b427552d69a6203d08d4140bffa4de5848ab6f8fda2aefcb24d0.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	cqimhswk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ygl.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
1316	cmd.exe
1036	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	ygl.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ygl.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1036	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2416	ygl.exe
2416	ygl.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2416	ygl.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1504	794c20c8d6f3b427552d69a6203d08d4140bffa4de5848ab6f8fda2aefcb24d0.exe
2628	cqimhswk.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1504 wrote to memory of 1316	1504	794c20c8d6f3b427552d69a6203d08d4140bffa4de5848ab6f8fda2aefcb24d0.exe	30
PID 1504 wrote to memory of 1316	1504	794c20c8d6f3b427552d69a6203d08d4140bffa4de5848ab6f8fda2aefcb24d0.exe	30
PID 1504 wrote to memory of 1316	1504	794c20c8d6f3b427552d69a6203d08d4140bffa4de5848ab6f8fda2aefcb24d0.exe	30
PID 1504 wrote to memory of 1316	1504	794c20c8d6f3b427552d69a6203d08d4140bffa4de5848ab6f8fda2aefcb24d0.exe	30
PID 1316 wrote to memory of 1036	1316	cmd.exe	32
PID 1316 wrote to memory of 1036	1316	cmd.exe	32
PID 1316 wrote to memory of 1036	1316	cmd.exe	32
PID 1316 wrote to memory of 1036	1316	cmd.exe	32
PID 1316 wrote to memory of 2628	1316	cmd.exe	33
PID 1316 wrote to memory of 2628	1316	cmd.exe	33
PID 1316 wrote to memory of 2628	1316	cmd.exe	33
PID 1316 wrote to memory of 2628	1316	cmd.exe	33
PID 2628 wrote to memory of 2416	2628	cqimhswk.exe	34
PID 2628 wrote to memory of 2416	2628	cqimhswk.exe	34
PID 2628 wrote to memory of 2416	2628	cqimhswk.exe	34
PID 2628 wrote to memory of 2416	2628	cqimhswk.exe	34

C:\Users\Admin\AppData\Local\Temp\794c20c8d6f3b427552d69a6203d08d4140bffa4de5848ab6f8fda2aefcb24d0.exe
"C:\Users\Admin\AppData\Local\Temp\794c20c8d6f3b427552d69a6203d08d4140bffa4de5848ab6f8fda2aefcb24d0.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1504
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\cqimhswk.exe "C:\Users\Admin\AppData\Local\Temp\794c20c8d6f3b427552d69a6203d08d4140bffa4de5848ab6f8fda2aefcb24d0.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1316
- - 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:1036
- - C:\Users\Admin\AppData\Local\Temp\cqimhswk.exe
    C:\Users\Admin\AppData\Local\Temp\\cqimhswk.exe "C:\Users\Admin\AppData\Local\Temp\794c20c8d6f3b427552d69a6203d08d4140bffa4de5848ab6f8fda2aefcb24d0.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2628
  - - \??\c:\Program Files\aiyhv\ygl.exe
      "c:\Program Files\aiyhv\ygl.exe" "c:\Program Files\aiyhv\yglnf.dll",Viewer C:\Users\Admin\AppData\Local\Temp\cqimhswk.exe
      4⤵
      Executes dropped EXE
      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:2416

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

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

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:\Program Files\aiyhv\ygl.exe

Filesize
43KB

MD5
51138beea3e2c21ec44d0932c71762a8

SHA1
8939cf35447b22dd2c6e6f443446acc1bf986d58

SHA256
5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124

SHA512
794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d

Download Submit
\??\c:\Program Files\aiyhv\yglnf.dll

Filesize
89KB

MD5
04ed1c07825ef08bc2ad24abb3c58702

SHA1
6a0ade0146dd6dc82a530b433abb6572fb56dad5

SHA256
f0ba081729f6dbb278fa8969ffce25310068acb21be20be6f279b0df97783993

SHA512
1040750db98e175f6315559c084b6af9c34d819015e394bbe6b46c167bf2d73d419180dc7c2dc9613767f8bb5bd626b257acaac064bc7d69726410aa1b0af534

Download Submit
\Users\Admin\AppData\Local\Temp\cqimhswk.exe

Filesize
396KB

MD5
469813263207e5aa59f8bc9f4d857583

SHA1
d7d59479a17158bcb45864628b501190f19324c6

SHA256
e6621b6fd589ae9a5cf68a65da9e4747297eeb8850c46102d06055d68a07493a

SHA512
3afc82aabf18d3a3ff87f7548963459b16d65a117f7ff3b42b2bf6a716c81b488ddde190741089a4af40a443aa5d8373194bdba72a36a69427a819898d1503d1

Download Submit
memory/2416-13-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/2416-18-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/2416-19-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/2416-24-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/2416-26-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads