6f918cda99092ef3de36b60e1eba55c28c0d1012adc678e580cd91609fbbe4f8

Analysis

max time kernel
150s
max time network
127s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
26/07/2024, 23:11

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General

Target

6f918cda99092ef3de36b60e1eba55c28c0d1012adc678e580cd91609fbbe4f8.exe
Size

71KB
MD5

e56fc52a7d427f7a06d468995163628d
SHA1

52ff9a29ba02f60898a59d112d1201ef1874cdc1
SHA256

6f918cda99092ef3de36b60e1eba55c28c0d1012adc678e580cd91609fbbe4f8
SHA512

d57d50f646056030f2a43953560007e53b8c064f0e1e234076d291ec58c4c13b70bd9e57edf066d4c407fd68011f1befabeef98351228bbaff59faace6827bc4
SSDEEP

768:EXKeT2Si83nLt8tkGX8uxOHgRrW5YLKG9Y/HrSNm0kmG7xMsVAnc3yy85SBiLFMP:EFrmh0HgB3LKrL9AcnQFMc9zwR6i+BC

Score

10^/10

discovery evasion persistence upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	svchost.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Boot or Logon Autostart Execution: Active Setup 2 TTPs 8 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	explorer.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	svchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	svchost.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	svchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe

Executes dropped EXE 4 IoCs

pid	Process
548	explorer.exe
1308	spoolsv.exe
2664	svchost.exe
2832	spoolsv.exe

Loads dropped DLL 8 IoCs

pid	Process
2292	6f918cda99092ef3de36b60e1eba55c28c0d1012adc678e580cd91609fbbe4f8.exe
2292	6f918cda99092ef3de36b60e1eba55c28c0d1012adc678e580cd91609fbbe4f8.exe
548	explorer.exe
548	explorer.exe
1308	spoolsv.exe
1308	spoolsv.exe
2664	svchost.exe
2664	svchost.exe

UPX packed file 13 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2292-0-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral1/files/0x000a000000016d81-6.dat	upx
behavioral1/files/0x000800000001722b-20.dat	upx
behavioral1/memory/548-26-0x0000000000440000-0x0000000000475000-memory.dmp	upx
behavioral1/files/0x00070000000174d0-35.dat	upx
behavioral1/memory/2664-43-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral1/memory/2832-58-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral1/memory/2292-62-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral1/memory/1308-60-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral1/files/0x000a000000016d66-63.dat	upx
behavioral1/memory/548-64-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral1/memory/2664-67-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral1/memory/548-78-0x0000000000400000-0x0000000000435000-memory.dmp	upx

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\system\\explorer.exe RO"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\system\\svchost.exe RO"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\system\\explorer.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\system\\svchost.exe RO"	explorer.exe

Drops file in Windows directory 6 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\system\explorer.exe	6f918cda99092ef3de36b60e1eba55c28c0d1012adc678e580cd91609fbbe4f8.exe
File opened for modification	\??\c:\windows\system\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	spoolsv.exe
File opened for modification	\??\c:\windows\system\explorer.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	svchost.exe
File opened for modification	C:\Windows\system\udsys.exe	explorer.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 8 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	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6f918cda99092ef3de36b60e1eba55c28c0d1012adc678e580cd91609fbbe4f8.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	at.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2292	6f918cda99092ef3de36b60e1eba55c28c0d1012adc678e580cd91609fbbe4f8.exe
548	explorer.exe
548	explorer.exe
548	explorer.exe
548	explorer.exe
2664	svchost.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe
2664	svchost.exe
548	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
548	explorer.exe
2664	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2292	6f918cda99092ef3de36b60e1eba55c28c0d1012adc678e580cd91609fbbe4f8.exe
2292	6f918cda99092ef3de36b60e1eba55c28c0d1012adc678e580cd91609fbbe4f8.exe
548	explorer.exe
548	explorer.exe
1308	spoolsv.exe
1308	spoolsv.exe
2664	svchost.exe
2664	svchost.exe
2832	spoolsv.exe
2832	spoolsv.exe
548	explorer.exe
548	explorer.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2292 wrote to memory of 548	2292	6f918cda99092ef3de36b60e1eba55c28c0d1012adc678e580cd91609fbbe4f8.exe	30
PID 2292 wrote to memory of 548	2292	6f918cda99092ef3de36b60e1eba55c28c0d1012adc678e580cd91609fbbe4f8.exe	30
PID 2292 wrote to memory of 548	2292	6f918cda99092ef3de36b60e1eba55c28c0d1012adc678e580cd91609fbbe4f8.exe	30
PID 2292 wrote to memory of 548	2292	6f918cda99092ef3de36b60e1eba55c28c0d1012adc678e580cd91609fbbe4f8.exe	30
PID 548 wrote to memory of 1308	548	explorer.exe	31
PID 548 wrote to memory of 1308	548	explorer.exe	31
PID 548 wrote to memory of 1308	548	explorer.exe	31
PID 548 wrote to memory of 1308	548	explorer.exe	31
PID 1308 wrote to memory of 2664	1308	spoolsv.exe	32
PID 1308 wrote to memory of 2664	1308	spoolsv.exe	32
PID 1308 wrote to memory of 2664	1308	spoolsv.exe	32
PID 1308 wrote to memory of 2664	1308	spoolsv.exe	32
PID 2664 wrote to memory of 2832	2664	svchost.exe	33
PID 2664 wrote to memory of 2832	2664	svchost.exe	33
PID 2664 wrote to memory of 2832	2664	svchost.exe	33
PID 2664 wrote to memory of 2832	2664	svchost.exe	33
PID 2664 wrote to memory of 2560	2664	svchost.exe	34
PID 2664 wrote to memory of 2560	2664	svchost.exe	34
PID 2664 wrote to memory of 2560	2664	svchost.exe	34
PID 2664 wrote to memory of 2560	2664	svchost.exe	34
PID 2664 wrote to memory of 1092	2664	svchost.exe	36
PID 2664 wrote to memory of 1092	2664	svchost.exe	36
PID 2664 wrote to memory of 1092	2664	svchost.exe	36
PID 2664 wrote to memory of 1092	2664	svchost.exe	36
PID 2664 wrote to memory of 2028	2664	svchost.exe	38
PID 2664 wrote to memory of 2028	2664	svchost.exe	38
PID 2664 wrote to memory of 2028	2664	svchost.exe	38
PID 2664 wrote to memory of 2028	2664	svchost.exe	38

C:\Users\Admin\AppData\Local\Temp\6f918cda99092ef3de36b60e1eba55c28c0d1012adc678e580cd91609fbbe4f8.exe
"C:\Users\Admin\AppData\Local\Temp\6f918cda99092ef3de36b60e1eba55c28c0d1012adc678e580cd91609fbbe4f8.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2292
- \??\c:\windows\system\explorer.exe
  c:\windows\system\explorer.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visiblity of hidden/system files in Explorer
  - Boot or Logon Autostart Execution: Active Setup
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:548
- - \??\c:\windows\system\spoolsv.exe
    c:\windows\system\spoolsv.exe SE
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1308
  - - \??\c:\windows\system\svchost.exe
      c:\windows\system\svchost.exe
      4⤵
      Modifies WinLogon for persistence
      Modifies visiblity of hidden/system files in Explorer
      Boot or Logon Autostart Execution: Active Setup
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2664
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2832
    - - C:\Windows\SysWOW64\at.exe
        
        at 23:13 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2560
    - - C:\Windows\SysWOW64\at.exe
        
        at 23:14 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:1092
    - - C:\Windows\SysWOW64\at.exe
        
        at 23:15 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2028

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\mrsys.exe

Filesize
71KB

MD5
c6a9717d81e74ae0f6ea70904cd54e1e

SHA1
7ce97fd7b480393e10e1a29f6b66fdb2415ad979

SHA256
da80109d63a04ac06e22b0ac539b665ae8ea7807c735ec3a9e9b62f0e36ae806

SHA512
0b183aa0d050d35c9c036acbe840e8d9f89a3759e4b8ef921c0f839a7e17d91a4e03eb8fad7ba594b29f7fa8f861544a093b2115c9daf004f5eb93d3186176c2

Download Submit
\Windows\system\explorer.exe

Filesize
71KB

MD5
57e14d7d15d338e7c6a4b3eadcc7b152

SHA1
f4456af4c73b8bbcbcf2067cb12ad8463d80849b

SHA256
fcfea2b1449c978f111c93e0f0372b97e764b407cf7a1cc955f1beed6205ba7c

SHA512
fc194b3c415a1a2d929c578f6ef45e326f0b2f0156574ac198019ed61056dcb2b3efdd2e522226c22270ee33a6826cefe56a19bc2c6fbf991e3cb6f84f895068

Download Submit
\Windows\system\spoolsv.exe

Filesize
71KB

MD5
cea5c623d34659bd61fc48e108f507f3

SHA1
d17cd31ae0b790d0313f2c50787da5fe69153228

SHA256
d35e541224d5433550c77cb5ce96092c9ad7eaf7eab93e388b166604565adbde

SHA512
16ca6d3a5c019fa36ce14959109ff0ca6cfd9775d1b30cd351fe7d12e2c4f7a8fe99a1344b3e65dd3ae322ff38335340e261ec28287408857c15c753837dd545

Download Submit
\Windows\system\svchost.exe

Filesize
71KB

MD5
d4a3ee1f25dcf4e2cc0a90229b75ec06

SHA1
8860c289e06dc13f811f6f415e0ba737957527b5

SHA256
e4aebc3c07ced0a19f2d81a440fdc93b44b3674bcfe8bec117836d7a781b57cb

SHA512
f219d137a2644a472f84279f9f8a576db9f1f8f91c146d89280b25e53fb31f8d35efebbc24af8fe4192d35b74bcf52eb8d60a2924e572ac04fdd1bd8ef91f84a

Download Submit
memory/548-65-0x0000000000440000-0x0000000000475000-memory.dmp

Filesize
212KB

Download
memory/548-78-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/548-26-0x0000000000440000-0x0000000000475000-memory.dmp

Filesize
212KB

Download
memory/548-64-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/548-27-0x0000000000440000-0x0000000000475000-memory.dmp

Filesize
212KB

Download
memory/1308-60-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1308-42-0x00000000025A0000-0x00000000025D5000-memory.dmp

Filesize
212KB

Download
memory/2292-0-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2292-62-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2292-12-0x0000000001E50000-0x0000000001E85000-memory.dmp

Filesize
212KB

Download
memory/2664-51-0x00000000024F0000-0x0000000002525000-memory.dmp

Filesize
212KB

Download
memory/2664-67-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2664-70-0x00000000024F0000-0x0000000002525000-memory.dmp

Filesize
212KB

Download
memory/2664-71-0x00000000024F0000-0x0000000002525000-memory.dmp

Filesize
212KB

Download
memory/2664-43-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2832-58-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download