flawedammyy | dac399cd370db99711be5b31c1b5935432b9cd11c5e9745e752a5a7b66ef9e67

General

Target

test/fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Size

3.6MB
MD5

743a6891999db5d7179091aba5f98fdb
SHA1

eeca4b8f88fcae9db6f54304270699d459fb5722
SHA256

fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f
SHA512

9edef033663c828536190332ec87ac0096ffddae934d17c51b255a55ecb05774211a0edb1915c19384641befa291cfdfd2e3f878bf3b827f8b203ec1bee9dd96

Score

10^/10

flawedammyy evasion persistence trojan

Malware Config

Signatures

FlawedAmmyy RAT
Remote-access trojan based on leaked code for the Ammyy remote admin software.
trojan flawedammyy
Creates new service(s) 1 TTPs
persistence

New Service
T1050

Executes dropped EXE 2 IoCs

pid	Process
4084	TextEdit.exe
968	wlanspeed.exe

Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation	wlanspeed.exe

Loads dropped DLL 3 IoCs

pid	Process
3188	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
3188	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
3188	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\Run	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SinTech client = "C:\\Program Files (x86)\\SinTech\\TextEdit.exe"	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs

pid	Process
968	wlanspeed.exe
968	wlanspeed.exe
968	wlanspeed.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\SinTech\TextEdit.exe	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
File created	C:\Program Files (x86)\SinTech\TextEdit.exe.config	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe

Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies Internet Explorer Automatic Crash Recovery 1 TTPs 1 IoCs

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\Recovery\AutoRecover = "2"	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe

Modifies Internet Explorer Protected Mode Banner 1 TTPs 1 IoCs

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\NoProtectedModeBanner = "1"	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe

Modifies Internet Explorer settings 1 TTPs 21 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\Check_Associations = "no"	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\IE10RunOnceLastShown = "1"	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\IE10RunOnceLastShown_TIMESTAMP = 232ab69ccc22d401	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{9CE6C008-7946-11EC-82D1-428252A9935A} = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\MACHINE\Software\Microsoft\Internet Explorer\Recovery	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Key created	\REGISTRY\MACHINE\Software\Microsoft\Internet Explorer\Main	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\Recovery\AutoRecover = "2"	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\IE10RunOnceCompletionTime = f84268cb0c09d401	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Key created	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\MACHINE\Software\Microsoft\Internet Explorer\main	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\IE10TourShown = "1"	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\IE10TourShownTime = f84268cb0c09d401	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\IE10RunOncePerInstallCompleted = "1"	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1772	iexplore.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
1772	iexplore.exe
1772	iexplore.exe
968	wlanspeed.exe
3524	IEXPLORE.EXE
3524	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3188 wrote to memory of 4084	3188	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	60
PID 3188 wrote to memory of 4084	3188	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	60
PID 3188 wrote to memory of 3016	3188	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	61
PID 3188 wrote to memory of 3016	3188	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	61
PID 3188 wrote to memory of 3016	3188	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	61
PID 3016 wrote to memory of 3824	3016	cmd.exe	63
PID 3016 wrote to memory of 3824	3016	cmd.exe	63
PID 3016 wrote to memory of 3824	3016	cmd.exe	63
PID 3016 wrote to memory of 3196	3016	cmd.exe	64
PID 3016 wrote to memory of 3196	3016	cmd.exe	64
PID 3016 wrote to memory of 3196	3016	cmd.exe	64
PID 3016 wrote to memory of 1892	3016	cmd.exe	65
PID 3016 wrote to memory of 1892	3016	cmd.exe	65
PID 3016 wrote to memory of 1892	3016	cmd.exe	65
PID 1772 wrote to memory of 3524	1772	iexplore.exe	70
PID 1772 wrote to memory of 3524	1772	iexplore.exe	70
PID 1772 wrote to memory of 3524	1772	iexplore.exe	70
PID 3016 wrote to memory of 924	3016	cmd.exe	71
PID 3016 wrote to memory of 924	3016	cmd.exe	71
PID 3016 wrote to memory of 924	3016	cmd.exe	71
PID 3188 wrote to memory of 968	3188	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	72
PID 3188 wrote to memory of 968	3188	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	72
PID 3188 wrote to memory of 968	3188	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	72

C:\Users\Admin\AppData\Local\Temp\test\fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
"C:\Users\Admin\AppData\Local\Temp\test\fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Program Files directory
- Modifies Internet Explorer Automatic Crash Recovery
- Modifies Internet Explorer Protected Mode Banner
- Modifies Internet Explorer settings
- Suspicious use of WriteProcessMemory
PID:3188
- C:\Program Files (x86)\SinTech\TextEdit.exe
  "C:\Program Files (x86)\SinTech\TextEdit.exe"
  2⤵
  - Executes dropped EXE
  PID:4084
- C:\Windows\SysWOW64\cmd.exe
  cmd /c sc create Wlanspeed binpath= "C:\ProgramData\Wlanspeed\wlanspeed.exe -service" start= auto displayname= "Wlanspeed" & sc description Wlanspeed "Wlanspeed service" && netsh advfirewall firewall add rule name="Wlanspeed" dir=in action=allow profile=any description="Wlanspeed service" program="C:\programdata\Wlanspeed\wlanspeed.exe" && netsh advfirewall firewall add rule name="Wlanspeed" dir=out action=allow profile=any description="Wlanspeed service" program="C:\programdata\Wlanspeed\wlanspeed.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3016
- - C:\Windows\SysWOW64\sc.exe
    sc create Wlanspeed binpath= "C:\ProgramData\Wlanspeed\wlanspeed.exe -service" start= auto displayname= "Wlanspeed"
    3⤵
    PID:3824
- - C:\Windows\SysWOW64\sc.exe
    sc description Wlanspeed "Wlanspeed service"
    3⤵
    PID:3196
- - C:\Windows\SysWOW64\netsh.exe
    netsh advfirewall firewall add rule name="Wlanspeed" dir=in action=allow profile=any description="Wlanspeed service" program="C:\programdata\Wlanspeed\wlanspeed.exe"
    3⤵
    PID:1892
- - C:\Windows\SysWOW64\netsh.exe
    netsh advfirewall firewall add rule name="Wlanspeed" dir=out action=allow profile=any description="Wlanspeed service" program="C:\programdata\Wlanspeed\wlanspeed.exe"
    3⤵
    PID:924
- C:\ProgramData\Wlanspeed\wlanspeed.exe
  "C:\ProgramData\Wlanspeed\wlanspeed.exe" -getid -nogui
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetWindowsHookEx
  PID:968

C:\Program Files (x86)\Internet Explorer\ielowutil.exe
"C:\Program Files (x86)\Internet Explorer\ielowutil.exe" -CLSID:{0002DF01-0000-0000-C000-000000000046} -Embedding
1⤵
PID:1004

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
1⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1772
- C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
  "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1772 CREDAT:17410 /prefetch:2
  2⤵
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:3524

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

New Service

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

New Service

1

T1050

Defense Evasion

Modify Registry

4

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/968-140-0x000000007FA70000-0x000000007FE41000-memory.dmp

Filesize
3.8MB

Download
memory/4084-136-0x00000000007E0000-0x00000000007FC000-memory.dmp

Filesize
112KB

Download
memory/4084-137-0x000000001B420000-0x000000001B422000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads