flawedammyy | 1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed

General

Target

1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe
Size

755KB
MD5

11bc606269a161555431bacf37f7c1e4
SHA1

63c52b0ac68ab7464e2cd777442a5807db9b5383
SHA256

1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed
SHA512

0be867fce920d493d2a37f996627bceea87621ba4071ae4383dd4a24748eedf7dc5ca6db089217b82ec38870248c6840f785683bf359d1014c7109e7d46dd90f
SSDEEP

12288:XVFUEuNmwvGrw9i0aTGRGicBckyyFRtWY1i3FTsvOVV0gz:3UEUUw9RaTNicBrPFRtJ1iVTsC5z

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

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.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	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe

Modifies data under HKEY_USERS 9 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr = 537d567366087c6658524c1752534f37bbfef219b36b	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = c4f9f1dd0e571775c0badacd1785db9a419010bf6b92f29d3d626fa213bf5113ae6d50db7d6499e7d7b57c46a72b6109946251d0d35adff633a132049aad65f5e7d194f1df0eca3d6dd5f1	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4992	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4992	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3584 wrote to memory of 4992	3584	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe	84
PID 3584 wrote to memory of 4992	3584	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe	84
PID 3584 wrote to memory of 4992	3584	1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe	84

C:\Users\Admin\AppData\Local\Temp\1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe
"C:\Users\Admin\AppData\Local\Temp\1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:3016

C:\Users\Admin\AppData\Local\Temp\1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe
"C:\Users\Admin\AppData\Local\Temp\1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe" -service -lunch
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3584
- C:\Users\Admin\AppData\Local\Temp\1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.exe
  "C:\Users\Admin\AppData\Local\Temp\1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed.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
  PID:4992

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\hr

Filesize
22B

MD5
5c557c51113a3cb7b96fa4512a01c552

SHA1
83e83d9b6736e652a548f3659f80f4a63d4b582e

SHA256
ae710173a7aff7e8821a4865a4652d2baf272b6714461c744f51415bf228cfbf

SHA512
889a482d376efd9ce60c9984adfadfa7c4ced135eedd8424221d9b16130a560dcb79d52021687f883305048859e136cbd74cf9da32ed93cb9d7df98cbd807520

Download Submit
C:\ProgramData\AMMYY\hr3

Filesize
75B

MD5
6306b0b13fe359bf7f8db5e90af4a586

SHA1
c35020421ec1b891a250204b49cb2ef9eb3c9da4

SHA256
1ad9777de333a6929847632b95b405b32bdb75786e7820f1c1125a625e615f93

SHA512
cbf59a4977cbb2885d7055dd35c97e9965ce45716eb87c399b83c1967b8484a38d0660e76c88f0c836ca21f53ce15fedf85e0efe6f0bfafec5559286bac4d595

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

Filesize
271B

MD5
714f2508d4227f74b6adacfef73815d8

SHA1
a35c8a796e4453c0c09d011284b806d25bdad04c

SHA256
a5579945f23747541c0e80b79e79375d4ca44feafcd425ee9bd9302e35312480

SHA512
1171a6eac6d237053815a40c2bcc2df9f4209902d6157777377228f3b618cad50c88a9519444ed5c447cf744e4655272fb42dabb567df85b4b19b1a2f1d086d8

Download Submit

Analysis

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