flawedammyy | 43bba98a64dd96cf0571f3d6dceafdc549cc3767a1beab6fe4a6e1fd3ddd3153

General

Target

AA_v3.5.exe
Size

751KB
MD5

5686a7032e37087f0fd082a04f727aad
SHA1

341fee5256dcc259a3a566ca8f0260eb1e60d730
SHA256

43bba98a64dd96cf0571f3d6dceafdc549cc3767a1beab6fe4a6e1fd3ddd3153
SHA512

0ebd95b20ef54d047fdaec37cfb10e2c39ea9d63fa28d6a6848ec11b34a4c4ec5f7a8a430d81670461203b9e675ac4a32cac3da4a1c471f16e8d003c6dea3345
SSDEEP

12288:oPO1fNZApVuCN7e/yalnM4RtjLDXcbOAS3snvVgbgJ:om1fN6pkCNa/yaq4RtjXcu3sSEJ

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-1-5-21-3533259084-2542256011-65585152-1000\Control Panel\International\Geo\Nation	AA_v3.5.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	AA_v3.5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AA_v3.5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AA_v3.5.exe

Modifies data under HKEY_USERS 6 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	AA_v3.5.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin	AA_v3.5.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	AA_v3.5.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy	AA_v3.5.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr = 537d567366087c6658524c175253b79b38e8e674b36b	AA_v3.5.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr3 = c62969de6af7377fad0364f7bdc342fefff822fef39fc00a2e7f4a9687b4a6a9d513ba6986197027d3da1698ae6d2ebf3188d8873cbed8a247cb259c849799d703adaa0a737cf69d997e7a	AA_v3.5.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeBackupPrivilege	1588	AA_v3.5.exe
Token: SeRestorePrivilege	1588	AA_v3.5.exe
Token: SeBackupPrivilege	1588	AA_v3.5.exe
Token: SeRestorePrivilege	1588	AA_v3.5.exe
Token: SeBackupPrivilege	1588	AA_v3.5.exe
Token: SeRestorePrivilege	1588	AA_v3.5.exe
Token: SeBackupPrivilege	1588	AA_v3.5.exe
Token: SeRestorePrivilege	1588	AA_v3.5.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1588	AA_v3.5.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1588	AA_v3.5.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2064 wrote to memory of 1588	2064	AA_v3.5.exe	31
PID 2064 wrote to memory of 1588	2064	AA_v3.5.exe	31
PID 2064 wrote to memory of 1588	2064	AA_v3.5.exe	31
PID 2064 wrote to memory of 1588	2064	AA_v3.5.exe	31

C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe
"C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2504

C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe
"C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe" -service -lunch
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2064
- C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe
  "C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Modifies data under HKEY_USERS
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:1588

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\hr

Filesize
22B

MD5
2fbc910539bd0826b7a34c61da8eb964

SHA1
f30499af573cf1a2537787abaaaa587e9e81d26f

SHA256
4b2abdef01694d712a84673f440865c20865870da50c5943cfdfd8dc8b8b8ea5

SHA512
4096da0c5c6b4f463667b4817c3776cf7f3aced7fa4455dd8e86ac8d81913aa1b8e316b0b6e47363b6a8647e3b197a84e867ed93cb2e02ae43b48ef8606a6088

Download Submit
C:\ProgramData\AMMYY\hr3

Filesize
75B

MD5
fb6b8a39e86ec29b9a148afce664a404

SHA1
cbc5349eb8bb0bbe86be7d67d3818da8ae691616

SHA256
c1e42756d9ac022673ead196adaaeb32da392b0659fe2937640274c0a3f9fcac

SHA512
f9eeaf4c97881651a4d99fd7953d9704f6edfce0805360502e2a46f40ae07b783ceea7a64cb7f7c18747177fe73ddbbc0afc9798c79557df5f69ebd26216e970

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

Filesize
271B

MD5
714f2508d4227f74b6adacfef73815d8

SHA1
a35c8a796e4453c0c09d011284b806d25bdad04c

SHA256
a5579945f23747541c0e80b79e79375d4ca44feafcd425ee9bd9302e35312480

SHA512
1171a6eac6d237053815a40c2bcc2df9f4209902d6157777377228f3b618cad50c88a9519444ed5c447cf744e4655272fb42dabb567df85b4b19b1a2f1d086d8

Download Submit

Analysis

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