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
behavioral1/memory/2100-0-0x0000000000240000-0x000000000024F000-memory.dmp	buer
behavioral1/memory/2100-4-0x0000000040000000-0x000000004000C000-memory.dmp	buer
behavioral1/memory/2100-7-0x0000000000230000-0x000000000023D000-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
2784	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)	\??\A:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\E:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\L:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\M:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\N:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\K:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\Q:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\Y:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\J:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\R:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\S:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\X:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\U:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\B:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\G:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\H:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\I:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\O:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\P:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\T:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\V:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\W:	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe
File opened (read-only)	\??\Z:	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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2784	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2784	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 2784	2100	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe	30
PID 2100 wrote to memory of 2784	2100	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe	30
PID 2100 wrote to memory of 2784	2100	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe	30
PID 2100 wrote to memory of 2784	2100	7d8f0a53352c9188acef922dbecfa588_JaffaCakes118.exe	30

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:2100
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\4f803a9bdaef911936e0}"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2784

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

memory/2100-0-0x0000000000240000-0x000000000024F000-memory.dmp

Filesize
60KB

Download
memory/2100-4-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/2100-7-0x0000000000230000-0x000000000023D000-memory.dmp

Filesize
52KB

Download
memory/2784-10-0x00000000744F1000-0x00000000744F2000-memory.dmp

Filesize
4KB

Download
memory/2784-11-0x00000000744F0000-0x0000000074A9B000-memory.dmp

Filesize
5.7MB

Download
memory/2784-13-0x00000000744F0000-0x0000000074A9B000-memory.dmp

Filesize
5.7MB

Download
memory/2784-12-0x00000000744F0000-0x0000000074A9B000-memory.dmp

Filesize
5.7MB

Download
memory/2784-14-0x00000000744F0000-0x0000000074A9B000-memory.dmp

Filesize
5.7MB

Download

Analysis

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