flawedammyy | 74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a

General

Target

74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe
Size

748KB
MD5

3b4ed97de29af222837095a7c411b8a1
SHA1

ea003f86db4cf74e4348e7e43e4732597e04db96
SHA256

74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a
SHA512

2e1d1365163b08310e5112063be8ebd0ec1aa8c20a0872eef021978d6eb04a7b3d50af0a6472c246443585e665df2daa1e1a44a166780a8bf01de098a016e572
SSDEEP

12288:3VFUEuNmwvGrw9i0aTGRGicBckyyFRtWY1i3FTsvOVVUg0:XUEUUw9RaTNicBrPFRtJ1iVTsCZ0

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	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.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	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.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\Content\CachePrefix	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr = 537d567366087c6658524c1752531c481cc6d2dab36b	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = 81b3d1469a1e2d361be4e978859d3848023f2c343f8e97bcbb34cbd8efca2e277b8156c977112400f27d764dc5da10beec003bbe0c409313d60633b992d9dcd4a79ef5c832cf3e31ef89cb	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4136	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4136	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 796 wrote to memory of 4136	796	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe	85
PID 796 wrote to memory of 4136	796	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe	85
PID 796 wrote to memory of 4136	796	74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe	85

C:\Users\Admin\AppData\Local\Temp\74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe
"C:\Users\Admin\AppData\Local\Temp\74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:60

C:\Users\Admin\AppData\Local\Temp\74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe
"C:\Users\Admin\AppData\Local\Temp\74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe" -service -lunch
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:796
- C:\Users\Admin\AppData\Local\Temp\74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.exe
  "C:\Users\Admin\AppData\Local\Temp\74656a65e96590a2734384bf89cb9ff677dcedff5f6e937d350b9f46ec52cd0a.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:4136

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
3fa15dadeaa26bbc1a12345358a01425

SHA1
4cfcbb7784e2e48f2c3c7a96d225364f67d8ecfe

SHA256
f9b18466b313b57fb1fa0ba0f6797de7813aaa17bf959b8953fd6f6f92cb3044

SHA512
cd2da1ee4c71d2093faac8be7999a21657e65805cbc4cf080893362ad10ffacfeb0318693ac6e59f963b527555255f17bc522349b80c20ef2655426d845fa8a8

Download Submit
C:\ProgramData\AMMYY\hr3

Filesize
75B

MD5
dec5f81d784620cf0646dbb47ddb15aa

SHA1
cebad6f7b90a79eefb2e5955fbb9cbae02287bda

SHA256
9cf4483e1189e99158f48e80707978e985cee2529ccf13e13834d6f26a472e37

SHA512
b652cbe6b985d484f68fdc7888f34050ff595f6891baa69769c76a26965d4c4526c6ab6e178de17621b12ee7160a19cf17c268db8f7dfe4be53c607411665e3b

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

Filesize
307B

MD5
f795d65e68db37483dc74e692495e0b5

SHA1
e021c93cc3604b1b8fe1b0fe9de76bc68fa529ae

SHA256
812d72aab775a459c3a30e847c5a6dec7eb6772e81ea65e09e4ca08b89e08787

SHA512
4573e027414e4c25b4e7419bdad607f93c642f4acec6a66db05bc54fcc6593dba9c34059ab6d5b1bec71b4a3fe5b369513656302776a6f3b2691c3ef61ab3e68

Download Submit

Analysis

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