flawedammyy | 4d7fcade9b38d7cd2c853f565cbcc861dc2b2fc8f86d3a6ccb9ed41bb6577bcd

General

Target

2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
Size

652KB
MD5

2b5e761a3968fe2e84fa890374efaa3c
SHA1

8c9344268b7605f4888340fd9d8a094f867fd364
SHA256

4d7fcade9b38d7cd2c853f565cbcc861dc2b2fc8f86d3a6ccb9ed41bb6577bcd
SHA512

4a0cd66b103a1f37adea27b73f75cbc99307bfd120faf41f62c6abcdd4d1726fb109119ae0dda1fbb7ebe67e38778c6f9b5a0c6b7ca6dedba5470819346a705f
SSDEEP

12288:QaA9OKLSwaIN5U8xvFoRQMEoO2rx8ikfRtjIe9rtv8zl6pilgb:EkK+waI8JRQMEJ2rufRtse9rtv8zlWi2

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

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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.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	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\A82946818BB0433A7DC1AFD2189B16AF	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\A82946818BB0433A7DC1AFD2189B16AF	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\103621DE9CD5414CC2538780B4B75751	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.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	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe

Modifies data under HKEY_USERS 9 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3288	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3288	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 780 wrote to memory of 3288	780	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe	85
PID 780 wrote to memory of 3288	780	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe	85
PID 780 wrote to memory of 3288	780	2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe	85

C:\Users\Admin\AppData\Local\Temp\2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2956

C:\Users\Admin\AppData\Local\Temp\2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe" -service -lunch
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:780
- C:\Users\Admin\AppData\Local\Temp\2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\2b5e761a3968fe2e84fa890374efaa3c_JaffaCakes118.exe"
  2⤵
  - Checks computer location settings
  - 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:3288

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

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\settings.bin

Filesize
76B

MD5
090bba5cbe9cd62189310f633f14d686

SHA1
0ce1d78aace04650b0c592665686a89412c1771c

SHA256
7bc48188bbd0ad1b7ac10257e6a8fc5327f2ccfd56402a4353f6d8ef26eb0ff8

SHA512
846781bdb4d8902963f1859077c8db4c763fdd4ca28f0be83b95c20d324b5db030f312fc3d4f959dc05ca4f41ef872a49d123195494b16440e16ebcc5edb31a7

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Analysis

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