buer

Resubmissions

12-02-2021 17:46

210212-qj1pxv26za 10

12-02-2021 13:49

210212-qh2m1q4eyx 10

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General

Target

independent_appraisal.jar
Size

6KB
Sample

210212-qh2m1q4eyx
MD5

e94dbabc70b4396b39d3a3d3e53cf85b
SHA1

bc6f6267313c0a768ed3f8f92f90c1f105cbd949
SHA256

25840b76b6cf2762898086cd4b62e556bedb9ffcff1a565bad872662c2e5bb36
SHA512

fb2eb9aeb02d111c23cdb61f668affcfb3e847159ce8a158ed39e2f136b9993f8dc68ddbd649d8f13f75ced7f7499c6410861daa1fde8fb15c010c6ccd2f3582

Score

10^/10

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

http://wieubfavbrgaxyaadf.com:80/GoogleUpdate/Chrome/v12.142.3412/ChromeUpdate.exe

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

http://luasdyfaenflkjasdfh.com:80/ujbgRNkjhThjlikOkihyrdtuyt3s

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

http://wieubfavbrgaxyaadf.com:80/fjahglknfuidfejfsknclbiuakemfamomffnwuagNFakibgiuhnIfaiurakifahgbaliof83u4inr

Extracted

Family

buer

antipublicwestbank.com

Extracted

Family

cobaltstrike

http://wieubfavbrgaxyaadf.com:443/s/ref=nb_sb_noss_1/167-3294888-0262949/field-keywords=books

http://213.252.245.98:443/s/ref=nb_sb_noss_1/167-3294888-0262949/field-keywords=books

http://luasdyfaenflkjasdfh.com:443/s/ref=nb_sb_noss_1/167-3294888-0262949/field-keywords=books

Attributes

access_type
512
beacon_type
2048
host
wieubfavbrgaxyaadf.com,/s/ref=nb_sb_noss_1/167-3294888-0262949/field-keywords=books,213.252.245.98,/s/ref=nb_sb_noss_1/167-3294888-0262949/field-keywords=books
http_header1
AAAACgAAAAtBY2NlcHQ6ICovKgAAABAAAAAUSG9zdDogd3d3LmFtYXpvbi5jb20AAAAHAAAAAAAAAAMAAAACAAAADnNlc3Npb24tdG9rZW49AAAAAgAAAAxza2luPW5vc2tpbjsAAAABAAAALGNzbS1oaXQ9cy0yNEtVMTFCQjgyUlpTWUdKM0JES3wxNDE5ODk5MDEyOTk2AAAABgAAAAZDb29raWUAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
http_header2
AAAACgAAAAtBY2NlcHQ6ICovKgAAAAoAAAAWQ29udGVudC1UeXBlOiB0ZXh0L3htbAAAAAoAAAAgWC1SZXF1ZXN0ZWQtV2l0aDogWE1MSHR0cFJlcXVlc3QAAAAQAAAAFEhvc3Q6IHd3dy5hbWF6b24uY29tAAAACQAAAApzej0xNjB4NjAwAAAACQAAABFvZT1vZT1JU08tODg1OS0xOwAAAAcAAAAAAAAABQAAAAJzbgAAAAkAAAAGcz0zNzE3AAAACQAAACJkY19yZWY9aHR0cCUzQSUyRiUyRnd3dy5hbWF6b24uY29tAAAABwAAAAEAAAADAAAABAAAAAAAAA==
http_method1
GET
http_method2
POST
maxdns
255
polling_time
5000
port_number
443
sc_process32
%windir%\syswow64\rundll32.exe
sc_process64
%windir%\sysnative\rundll32.exe
state_machine
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCYd1oQf060FSdDXzjBJqdlpV8YWyEYknN6Z9OBGmUfGC658UlUamK8rmhpR2H5ifIBvJq1FFRmC1P0KRYvvr731B3yvjDDiQR8z4PvUaIroO1g/i6BZZfoJRGl+LlUHFxzg+knc+irsSpjerv2BcnkZk3ajwFA2i/E6E2UtsWVHQIDAQABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
unknown1
4096
unknown2
AAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
uri
/N4215/adj/amzn.us.sr.aps
user_agent
Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko

Extracted

Family

cobaltstrike

http://wieubfavbrgaxyaadf.com:443/s/ref=nb_sb_noss_1/167-3294888-0262949/field-keywords=books

http://213.252.245.98:443/s/ref=nb_sb_noss_1/167-3294888-0262949/field-keywords=books

Attributes

access_type
512
beacon_type
2048
host
wieubfavbrgaxyaadf.com,/s/ref=nb_sb_noss_1/167-3294888-0262949/field-keywords=books,213.252.245.98,/s/ref=nb_sb_noss_1/167-3294888-0262949/field-keywords=books
http_header1
AAAACgAAAAtBY2NlcHQ6ICovKgAAABAAAAAUSG9zdDogd3d3LmFtYXpvbi5jb20AAAAHAAAAAAAAAAMAAAACAAAADnNlc3Npb24tdG9rZW49AAAAAgAAAAxza2luPW5vc2tpbjsAAAABAAAALGNzbS1oaXQ9cy0yNEtVMTFCQjgyUlpTWUdKM0JES3wxNDE5ODk5MDEyOTk2AAAABgAAAAZDb29raWUAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
http_header2
AAAACgAAAAtBY2NlcHQ6ICovKgAAAAoAAAAWQ29udGVudC1UeXBlOiB0ZXh0L3htbAAAAAoAAAAgWC1SZXF1ZXN0ZWQtV2l0aDogWE1MSHR0cFJlcXVlc3QAAAAQAAAAFEhvc3Q6IHd3dy5hbWF6b24uY29tAAAACQAAAApzej0xNjB4NjAwAAAACQAAABFvZT1vZT1JU08tODg1OS0xOwAAAAcAAAAAAAAABQAAAAJzbgAAAAkAAAAGcz0zNzE3AAAACQAAACJkY19yZWY9aHR0cCUzQSUyRiUyRnd3dy5hbWF6b24uY29tAAAABwAAAAEAAAADAAAABAAAAAAAAA==
http_method1
GET
http_method2
POST
maxdns
255
polling_time
5000
port_number
443
sc_process32
%windir%\syswow64\rundll32.exe
sc_process64
%windir%\sysnative\rundll32.exe
state_machine
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCYd1oQf060FSdDXzjBJqdlpV8YWyEYknN6Z9OBGmUfGC658UlUamK8rmhpR2H5ifIBvJq1FFRmC1P0KRYvvr731B3yvjDDiQR8z4PvUaIroO1g/i6BZZfoJRGl+LlUHFxzg+knc+irsSpjerv2BcnkZk3ajwFA2i/E6E2UtsWVHQIDAQABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
unknown1
4096
unknown2
AAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
uri
/N4215/adj/amzn.us.sr.aps
user_agent
Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko

Targets

- Target
  
  independent_appraisal.jar
- Size
  
  6KB
- MD5
  
  e94dbabc70b4396b39d3a3d3e53cf85b
- SHA1
  
  bc6f6267313c0a768ed3f8f92f90c1f105cbd949
- SHA256
  
  25840b76b6cf2762898086cd4b62e556bedb9ffcff1a565bad872662c2e5bb36
- SHA512
  
  fb2eb9aeb02d111c23cdb61f668affcfb3e847159ce8a158ed39e2f136b9993f8dc68ddbd649d8f13f75ced7f7499c6410861daa1fde8fb15c010c6ccd2f3582
Score

10^/10

buer cobaltstrike backdoor loader trojan
- Buer
  Buer is a new modular loader first seen in August 2019.
  loader buer
- Cobaltstrike
  Detected malicious payload which is part of Cobaltstrike.
  trojan backdoor cobaltstrike
- Suspicious use of NtCreateProcessExOtherParentProcess
- Buer Loader
  Detects Buer loader in memory or disk.
- Blocklisted process makes network request
- Executes dropped EXE
- Loads dropped DLL
- Enumerates connected drives
  Attempts to read the root path of hard drives other than the default C: drive.
- Drops file in System32 directory
- Suspicious use of SetThreadContext
behavioral1