flawedammyy | 9b09e534cb648efcc4e433ef991a1e754fed130a4600faafc3455484cc9747ec

General

Target

ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
Size

648KB
MD5

ef18c0cfe98199f30ff9a635bb598621
SHA1

c445b4ee969c04067b485a9bbb5e3e54554aae42
SHA256

9b09e534cb648efcc4e433ef991a1e754fed130a4600faafc3455484cc9747ec
SHA512

4562ff9fd079c7d3880f02a2d30f685ad9b8409fe6d0f45c61dc8d7814a62aa66702f40e96e2e37568c29acd3c3b6b33c04722578504adafd8e7abff3b0a80dc
SSDEEP

12288:WaA9OKLSwaIN5U8xvFoRQMEoO2rx8ikfRtjIe9rtv8zl6cilgjD:qkK+waI8JRQMEJ2rufRtse9rtv8zlnii

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

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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe

Drops file in System32 directory 12 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\103621DE9CD5414CC2538780B4B75751	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\34B6AF881B9D738561FC099B83DF3A01	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\103621DE9CD5414CC2538780B4B75751	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\34B6AF881B9D738561FC099B83DF3A01	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	ef18c0cfe98199f30ff9a635bb598621_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	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.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\History\CachePrefix = "Visited:"	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeBackupPrivilege	2532	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
Token: SeRestorePrivilege	2532	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
Token: SeBackupPrivilege	2532	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
Token: SeRestorePrivilege	2532	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2532	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2532	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1984 wrote to memory of 2532	1984	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe	86
PID 1984 wrote to memory of 2532	1984	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe	86
PID 1984 wrote to memory of 2532	1984	ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe	86

C:\Users\Admin\AppData\Local\Temp\ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:3532

C:\Users\Admin\AppData\Local\Temp\ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe" -service -lunch
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1984
- C:\Users\Admin\AppData\Local\Temp\ef18c0cfe98199f30ff9a635bb598621_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\ef18c0cfe98199f30ff9a635bb598621_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 AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2532

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
127B

MD5
54ae4af418cd6540012968b7ddb0b3fa

SHA1
15b454bc0c29bc078e1b9bae24835ca902dc1de1

SHA256
4f5d33415e62339ef6f891a1f38e8d70cf8fa35ac37d8753cb6142c535497df6

SHA512
c46f93cd74c53e25c7240af7977b3524de67f2b0da4da7579cafccd2813345941318d9707fe75c9e9e26292ef7ca09b98bc48771db7d501d43f5863536a346d7

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Analysis

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