buer | e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd

General

Target

7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
Size

577KB
MD5

7d8f0a53352c9188acef922dbecfa588
SHA1

dc6115bdc6d63f476203e54e40cb35df72d4014d
SHA256

e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd
SHA512

6dd3b5d633344f0ee5d59589c28f45ab3647c5d41da27fe39f3025b826b2043a4fc094862762d4080d6546acac4996d25484501b09dc18da597dfb42e6600fa6
SSDEEP

12288:TCLIa6MfgkSnojUbPYLAwiw7gku+uFvTBMrKr:uLI8LLAwxgr7r

Score

10^/10

buer discovery execution loader

Malware Config

Extracted

Family

buer

C2

https://178.62.46.155/

Signatures

Buer
Buer is a new modular loader first seen in August 2019.
loader buer

Buer Loader 3 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral2/memory/688-4-0x0000000040000000-0x000000004000C000-memory.dmp	buer
behavioral2/memory/688-0-0x0000000000500000-0x000000000050F000-memory.dmp	buer
behavioral2/memory/688-7-0x00000000004F0000-0x00000000004FD000-memory.dmp	buer

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
728	powershell.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\T:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\V:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\O:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\P:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\U:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\W:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\Z:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\E:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\N:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\K:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\M:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\X:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\B:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\G:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\I:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\J:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\L:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\Q:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\R:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\S:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\A:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\H:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\Y:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
728	powershell.exe
728	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	728	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 688 wrote to memory of 728	688	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe	85
PID 688 wrote to memory of 728	688	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe	85
PID 688 wrote to memory of 728	688	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe	85

C:\Users\Admin\AppData\Local\Temp\7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe"
1⤵
- Enumerates connected drives
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:688
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\a48cf94fa46ee8a8cca4}"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:728

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

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:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jt401bvl.cf0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/688-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/688-7-0x00000000004F0000-0x00000000004FD000-memory.dmp

Filesize
52KB

Download
memory/688-4-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/728-27-0x00000000069D0000-0x0000000006A1C000-memory.dmp

Filesize
304KB

Download
memory/728-28-0x0000000006F00000-0x0000000006F32000-memory.dmp

Filesize
200KB

Download
memory/728-10-0x0000000074A70000-0x0000000075220000-memory.dmp

Filesize
7.7MB

Download
memory/728-12-0x0000000005A70000-0x0000000005A92000-memory.dmp

Filesize
136KB

Download
memory/728-15-0x00000000062E0000-0x0000000006346000-memory.dmp

Filesize
408KB

Download
memory/728-14-0x0000000074A70000-0x0000000075220000-memory.dmp

Filesize
7.7MB

Download
memory/728-13-0x0000000006270000-0x00000000062D6000-memory.dmp

Filesize
408KB

Download
memory/728-9-0x0000000002FF0000-0x0000000003026000-memory.dmp

Filesize
216KB

Download
memory/728-21-0x0000000006350000-0x00000000066A4000-memory.dmp

Filesize
3.3MB

Download
memory/728-26-0x0000000006940000-0x000000000695E000-memory.dmp

Filesize
120KB

Download
memory/728-8-0x0000000074A7E000-0x0000000074A7F000-memory.dmp

Filesize
4KB

Download
memory/728-30-0x0000000074A70000-0x0000000075220000-memory.dmp

Filesize
7.7MB

Download
memory/728-29-0x0000000070890000-0x00000000708DC000-memory.dmp

Filesize
304KB

Download
memory/728-11-0x0000000005B50000-0x0000000006178000-memory.dmp

Filesize
6.2MB

Download
memory/728-40-0x0000000006EE0000-0x0000000006EFE000-memory.dmp

Filesize
120KB

Download
memory/728-41-0x0000000074A70000-0x0000000075220000-memory.dmp

Filesize
7.7MB

Download
memory/728-42-0x0000000007930000-0x00000000079D3000-memory.dmp

Filesize
652KB

Download
memory/728-43-0x00000000082A0000-0x000000000891A000-memory.dmp

Filesize
6.5MB

Download
memory/728-44-0x0000000007C60000-0x0000000007C7A000-memory.dmp

Filesize
104KB

Download
memory/728-45-0x0000000007CD0000-0x0000000007CDA000-memory.dmp

Filesize
40KB

Download
memory/728-46-0x0000000007EE0000-0x0000000007F76000-memory.dmp

Filesize
600KB

Download
memory/728-47-0x0000000007E60000-0x0000000007E71000-memory.dmp

Filesize
68KB

Download
memory/728-48-0x0000000007E90000-0x0000000007E9E000-memory.dmp

Filesize
56KB

Download
memory/728-49-0x0000000007EA0000-0x0000000007EB4000-memory.dmp

Filesize
80KB

Download
memory/728-50-0x0000000007FA0000-0x0000000007FBA000-memory.dmp

Filesize
104KB

Download
memory/728-51-0x0000000007F80000-0x0000000007F88000-memory.dmp

Filesize
32KB

Download
memory/728-54-0x0000000074A70000-0x0000000075220000-memory.dmp

Filesize
7.7MB

Download

Analysis

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