flawedammyy | dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935

General

Target

dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe
Size

720KB
MD5

65b172782afd43866f06256a6f4085a8
SHA1

2867ae70390c9ae7da0e61bf46aecd2955a5dd8f
SHA256

dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935
SHA512

b0a8946f3d3d0bb913137ecb5e0353fabd0bbde4a66a7daf6e8a11f07ed41ed31f737d32e6ce688a0d58a56adb490f03b44b79d6e5c8293457a070dd8735b1ed
SSDEEP

12288:KzJUxbtiiTHRJuEkQO7EwC2ZwFRtAdRXRryd+sq1zkgqPE:K9oNTHRz/O7rT6FRteRXR2IsqzqPE

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	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.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	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe

Modifies data under HKEY_USERS 9 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr = 537d567366087c6658524c17525301e8ecd5f033b36b	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = 1a0ecb3a5f95d7ea39dbe1e7d97c1bc05ae9d018ccced517319972903260baf8c0ca136d7e179e713c9288fe28c4e24d7ad0038a2fbbafcf228db6853e9e9067b7cf0c76724b8f24aaaaf8	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3412	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3412	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1360 wrote to memory of 3412	1360	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe	84
PID 1360 wrote to memory of 3412	1360	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe	84
PID 1360 wrote to memory of 3412	1360	dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe	84

C:\Users\Admin\AppData\Local\Temp\dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe
"C:\Users\Admin\AppData\Local\Temp\dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:3168

C:\Users\Admin\AppData\Local\Temp\dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe
"C:\Users\Admin\AppData\Local\Temp\dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe" -service -lunch
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1360
- C:\Users\Admin\AppData\Local\Temp\dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.exe
  "C:\Users\Admin\AppData\Local\Temp\dffb2a4f8f65c2792a4f9cd223e834321a3c95e005c234f1ff0de567340d3935.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:3412

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
2a0a8100852961da2ea36cf35616e3f7

SHA1
5cd713d2fd5e56daf6059c4931824853dcb9e22a

SHA256
b9b9b1581fa8100d8cee15258628ce6d2d9ab64d8596ccbb8033b3d390b624d5

SHA512
6d43a5abe223285c8c75c1c0d44162d372981a7618d2191ac1e741253d17a5962848feeea57da2ed8800e03b76fd4ff3c0bd6681409ab03ff479f2a22c0464be

Download Submit
C:\ProgramData\AMMYY\hr3

Filesize
75B

MD5
e6c103b544750a0d1416c3e71ec09632

SHA1
edb8a51f2717281b846c07e99aaa25063edd2d3d

SHA256
669b49a4b6476a7e5bce2e0a4d762ab7e46e76fa663b9558ff2d85a0cd68238f

SHA512
92fb811aa79e682f46141963e0dddc5c39c4bc6817cab44a04e2baea2fb3e7b3df4e21f5b4abaf6750d615f52ab33627fa57da6b8aff9e8389edbde5649addbe

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

Filesize
283B

MD5
4da4bbef4087d4badfdb674a2e283b72

SHA1
0946e95f28d350f08a4339ba14ea3e2713a30221

SHA256
3ba4e1f2d16b7d9addf2dc6e44c97d29770846eb122fe42256a26ab6e2640f49

SHA512
cace21bbf08dd1985036a3307151a2c2be3729df4aae5e98eca1aa0acabfb7ac1bb323c47611e389400c7c45e8586bc9bdc854458db747bda681deb27e2184b4

Download Submit

Analysis

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