flawedammyy | dac399cd370db99711be5b31c1b5935432b9cd11c5e9745e752a5a7b66ef9e67

Analysis

max time kernel
27s
max time network
41s
platform
windows7_x64
resource
win7-ja-20211208
submitted
19-01-2022 15:40

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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
800	TextEdit.exe
1104	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-1-5-21-3846991908-3261386348-1409841751-1000\Control Panel\International\Geo\Nation	wlanspeed.exe

Loads dropped DLL 5 IoCs

pid	Process
516	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
516	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
516	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
516	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
516	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 2 IoCs

pid	Process
1104	wlanspeed.exe
1104	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 26 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\MAIN\IE8TourShownTime = 0c8ab1fc3237d401	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\IntelliForms	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{41038E01-793E-11EC-A2C5-6270D1E549EE} = "0"	iexplore.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\MAIN\IE8TourShown = "1"	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\Recovery\AutoRecover = "2"	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\LowRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\Toolbar	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\Zoom	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\PageSetup	iexplore.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\MAIN\IE8RunOnceLastShown = "1"	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\MAIN\IE8RunOnceLastShown_TIMESTAMP = 8afe20f63237d401	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Key created	\REGISTRY\MACHINE\Software\Microsoft\Internet Explorer\Recovery	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\GPU	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\IETld\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\InternetRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	iexplore.exe
Key created	\REGISTRY\MACHINE\Software\Microsoft\Internet Explorer\main	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\MAIN\Check_Associations = "no"	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1104	wlanspeed.exe
1824	iexplore.exe
1824	iexplore.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 516 wrote to memory of 800	516	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	27
PID 516 wrote to memory of 800	516	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	27
PID 516 wrote to memory of 800	516	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	27
PID 516 wrote to memory of 800	516	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	27
PID 516 wrote to memory of 1520	516	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	28
PID 516 wrote to memory of 1520	516	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	28
PID 516 wrote to memory of 1520	516	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	28
PID 516 wrote to memory of 1520	516	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	28
PID 1520 wrote to memory of 1944	1520	cmd.exe	30
PID 1520 wrote to memory of 1944	1520	cmd.exe	30
PID 1520 wrote to memory of 1944	1520	cmd.exe	30
PID 1520 wrote to memory of 1944	1520	cmd.exe	30
PID 1520 wrote to memory of 632	1520	cmd.exe	31
PID 1520 wrote to memory of 632	1520	cmd.exe	31
PID 1520 wrote to memory of 632	1520	cmd.exe	31
PID 1520 wrote to memory of 632	1520	cmd.exe	31
PID 1520 wrote to memory of 1316	1520	cmd.exe	32
PID 1520 wrote to memory of 1316	1520	cmd.exe	32
PID 1520 wrote to memory of 1316	1520	cmd.exe	32
PID 1520 wrote to memory of 1316	1520	cmd.exe	32
PID 516 wrote to memory of 1104	516	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	33
PID 516 wrote to memory of 1104	516	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	33
PID 516 wrote to memory of 1104	516	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	33
PID 516 wrote to memory of 1104	516	fe9d72dd4b046bafdd144902ab570297629f83d06afb5a9ba7703382a29d588f.exe	33
PID 1824 wrote to memory of 1544	1824	iexplore.exe	35
PID 1824 wrote to memory of 1544	1824	iexplore.exe	35
PID 1824 wrote to memory of 1544	1824	iexplore.exe	35
PID 1824 wrote to memory of 1544	1824	iexplore.exe	35

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:516
- C:\Program Files (x86)\SinTech\TextEdit.exe
  "C:\Program Files (x86)\SinTech\TextEdit.exe"
  2⤵
  - Executes dropped EXE
  PID:800
- 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:1520
- - C:\Windows\SysWOW64\sc.exe
    sc create Wlanspeed binpath= "C:\ProgramData\Wlanspeed\wlanspeed.exe -service" start= auto displayname= "Wlanspeed"
    3⤵
    PID:1944
- - C:\Windows\SysWOW64\sc.exe
    sc description Wlanspeed "Wlanspeed service"
    3⤵
    PID:632
- - 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:1316
- 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:1104

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
1⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1824
- C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
  "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1824 CREDAT:275457 /prefetch:2
  2⤵
  PID:1544

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

New Service

T1050

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

New Service

T1050

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/516-54-0x0000000074EB1000-0x0000000074EB3000-memory.dmp

Filesize
8KB

Download
memory/800-63-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/800-64-0x000000001AF70000-0x000000001AF72000-memory.dmp

Filesize
8KB

Download
memory/800-65-0x000000001B460000-0x000000001B742000-memory.dmp

Filesize
2.9MB

Download
memory/800-61-0x0000000000940000-0x000000000095C000-memory.dmp

Filesize
112KB

Download
memory/1104-71-0x000000007EBD0000-0x000000007EFA1000-memory.dmp

Filesize
3.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads