Resubmissions
10/03/2023, 22:01
230310-1xerdshc7x714/02/2023, 16:10
230214-tmg1faee72731/01/2023, 07:47
230131-jmw49afe541026/12/2022, 21:03
221226-zv36jaha4x1024/12/2022, 19:27
221224-x6gessdf7z1013/12/2022, 03:51
221213-eenexsgc4v1012/12/2022, 11:33
221212-npbnjsbc281006/12/2022, 06:29
221206-g8658sca54805/12/2022, 06:17
221205-g19ldsgh7x10General
- Target RustExternal_nls.exe
- Size 658KB
- Sample221212-npbnjsbc28
- SHA256 c6dda31fa6cb4ce140f62c9ce604672fa4a9ba5d1792f2d77f3cfcb43b3227ac
- MD5 1ab8dbca5e2bba39723f00907d266de7
- SHA1 729cb808637568f20ac886b3fac5f3cf5ff01dee
- SHA512 d1a31848eb9b683793afd36031ef8078ff962c2526272782cf2fca8db11afb71643a46b9ad6bce3ba8dba1b638672205726f6e96c7dd3e887228a2368ec08081
- SSDEEP 12288:3oSO5i2eVUIvybKcEz4MM7S9HdKINesX7j6p9PI8GS0oN2:3ouTVUIvtH4H7aLeO23gRoY
- MD5 SHA1 SHA512 SSDEEP
Static task
static1
Behavioral task
behavioral1
Sample
RustExternal_nls.exe
Resource
win7-20221111-en
7 signatures
150 seconds
Behavioral task
behavioral2
Sample
RustExternal_nls.exe
Resource
win10v2004-20220901-en
17 signatures
150 seconds
Malware Config
Extracted
Family
-
asyncrat
Version
-
0.5.7B
Botnet
-
System Guard Runtime
C2
-
85.105.88.221:2531
Mutex
-
System Guard Runtime
Attributes
-
delay
3
-
install
false
-
install_file
System Guard Runtime
-
install_folder
%AppData%
aes.plain
Extracted
Family
-
asyncrat
Version
-
0.5.7B
Botnet
-
DefenderSmartScren
C2
-
217.64.31.3:8437
Mutex
-
DefenderSmartScren
Attributes
-
delay
3
-
install
false
-
install_file
SecurityHealtheurvice.exe
-
install_folder
%AppData%
aes.plain
Targets
-
- Target RustExternal_nls.exe
- Size 658KB
- SHA256 c6dda31fa6cb4ce140f62c9ce604672fa4a9ba5d1792f2d77f3cfcb43b3227ac
- MD5 1ab8dbca5e2bba39723f00907d266de7
- SHA1 729cb808637568f20ac886b3fac5f3cf5ff01dee
- SHA512 d1a31848eb9b683793afd36031ef8078ff962c2526272782cf2fca8db11afb71643a46b9ad6bce3ba8dba1b638672205726f6e96c7dd3e887228a2368ec08081
- SSDEEP 12288:3oSO5i2eVUIvybKcEz4MM7S9HdKINesX7j6p9PI8GS0oN2:3ouTVUIvtH4H7aLeO23gRoY
- MD5 SHA1 SHA512 SSDEEP
Async RAT payload
Blocklisted process makes network request
Downloads MZ/PE file
Executes dropped EXE
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
Loads dropped DLL
Adds Run key to start application
Suspicious use of SetThreadContext