flawedammyy | 126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1

General

Target

126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
Size

768KB
MD5

a93eeb5fc2c4ba7d97d8351fb0cb7190
SHA1

67bfc742acc1c2cf9d9a5f2d0f3b01829388ce44
SHA256

126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1
SHA512

1282356db54bc7fc1af2a708d07bf7844544cbcec745111737ac4435c353e8f4b94703abc8bd842f482e1dfbedfdabf9f917f524fa3196d49da43ea367f7556c
SSDEEP

12288:ngby1pKmZmjrWinaxABtyZPyoOOORtfWV5gk3VP0nkVg3gX:Yy1pVmjrWivBtyZPy2ORt+V5ggVP0tQX

Score

10^/10

flawedammyy discovery trojan

Malware Config

Signatures

FlawedAmmyy RAT
Remote-access trojan based on leaked code for the Ammyy remote admin software.
trojan flawedammyy
Flawedammyy family
flawedammyy

Blocklisted process makes network request 1 IoCs

flow	pid	Process
56	772	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
772	rundll32.exe

Drops file in System32 directory 12 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\103621DE9CD5414CC2538780B4B75751	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\34B6AF881B9D738561FC099B83DF3A01	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\34B6AF881B9D738561FC099B83DF3A01	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\103621DE9CD5414CC2538780B4B75751	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe

System Location Discovery: System Language Discovery 1 TTPs 3 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	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe

Modifies data under HKEY_USERS 14 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = 01a4cdc1e3f0a67ce80eaafdb9020a97314d76f20f0476fbc08130e09a75ee0ad62ac8ea1345421e7115e1153dbc1f949899c4124aea063325a27df0d2535817acb0dec1552cf752b7ee99	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe

Suspicious behavior: EnumeratesProcesses 42 IoCs

pid	Process
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe
772	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeLockMemoryPrivilege	772	rundll32.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4764	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4764	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2008 wrote to memory of 4764	2008	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe	84
PID 2008 wrote to memory of 4764	2008	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe	84
PID 2008 wrote to memory of 4764	2008	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe	84
PID 4764 wrote to memory of 772	4764	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe	103
PID 4764 wrote to memory of 772	4764	126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe	103

C:\Users\Admin\AppData\Local\Temp\126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
"C:\Users\Admin\AppData\Local\Temp\126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:1420

C:\Users\Admin\AppData\Local\Temp\126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
"C:\Users\Admin\AppData\Local\Temp\126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe" -service -lunch
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2008
- C:\Users\Admin\AppData\Local\Temp\126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe
  "C:\Users\Admin\AppData\Local\Temp\126a57040b5fa867b6b0e851569ad48ecfac90ff547c3fb5f0aee4a6601d08b1N.exe"
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Modifies data under HKEY_USERS
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:4764
- - C:\Windows\SYSTEM32\rundll32.exe
    rundll32.exe "C:\ProgramData\AMMYY\aa_nts.dll",run
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:772

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\AMMYY\aa_nts.dll

Filesize
902KB

MD5
480a66902e6e7cdafaa6711e8697ff8c

SHA1
6ac730962e7c1dba9e2ecc5733a506544f3c8d11

SHA256
7eaaaa6010bbcd6bb8c9ad08d4b0966c7aedc9b2ac24758f170012ac36e508b5

SHA512
7d010cd47b7d1adf66f9c97afc6c3805997aa5c7cc6ff13eddee81f24cf2b95a3fe375ec5b3d6185c0bc8840b4ad91ae143c73a39af26391cc182ab6a1793ba5

Download Submit
C:\ProgramData\AMMYY\aa_nts.msg

Filesize
45B

MD5
f5d867c23b8cac17baecc8cd2ac118b9

SHA1
ab0da5d10496611ae18f28822c32507aa531dfc4

SHA256
52ebeac5f05e8e12afb680e5e291b41a440cc7dbb812fddd075b6f7586c4fd2b

SHA512
1a067037fb1a8f6782681902e6dc391e399c5caf3e430bdacc30d2cd36985d4eff72359d676e7799dbac3f2f58f697181934a67af18a366cb58a69e6f56e837d

Download Submit
C:\ProgramData\AMMYY\settings3.bin

Filesize
316B

MD5
4d75d61260a946b1017c2bae293cabc7

SHA1
05257b0afe1113f1eded4b5aafdbe0feb8457d5b

SHA256
85fa7940ba5b07606dd152ca23dcd1ed27a99d3c9f5ff58f4f95cec4ffc9cf6f

SHA512
e3dd5011cce6adb6d2f79a34b2cf59c40783d8d9ba66e3d190d8077e4bde1e3ec0d5afe5f720ff8064d554e6f8a5a4a0ee2462681c8affaec1bed1ef60b54969

Download Submit
memory/772-18-0x0000000064200000-0x00000000642EE000-memory.dmp

Filesize
952KB

Download
memory/772-40-0x0000000064200000-0x00000000642EE000-memory.dmp

Filesize
952KB

Download

Analysis

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