buer | 6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d

General

Target

8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
Size

598KB
MD5

8b44470c7ff69ae671ff6e04550ee15f
SHA1

123f9a7487cd0fdd772f0e7bb19e70d1ee3a32e7
SHA256

6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d
SHA512

0e03e5895bd406ed61c6e5343e184eb5a86d4ee1b195b35be88fea4fee4508b0a525725ec92971f2c0bc1a929d4dda1f0853bc576071cdefef8adb1a5f45e0de
SSDEEP

12288:CTGH1xeTanpp9tmq7sXV6ZwnNrlnButp4aCiUOREDw:CibmqYcZwnNRH4R9

Score

10^/10

buer discovery execution loader

Malware Config

Extracted

Family

buer

C2

https://104.248.83.13/

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/2208-4-0x0000000040000000-0x000000004000C000-memory.dmp	buer
behavioral1/memory/2208-0-0x0000000000240000-0x000000000024F000-memory.dmp	buer
behavioral1/memory/2208-7-0x0000000000230000-0x000000000023D000-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
2764	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)	\??\W:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\B:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\G:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\H:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\K:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\T:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\V:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\Z:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\M:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\N:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\O:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\P:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\Q:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\S:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\E:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\J:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\L:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\U:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\A:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\I:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\R:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\X:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\Y:	8b44470c7ff69ae671ff6e04550ee15f_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	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2764	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2764	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2208 wrote to memory of 2764	2208	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe	31
PID 2208 wrote to memory of 2764	2208	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe	31
PID 2208 wrote to memory of 2764	2208	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe	31
PID 2208 wrote to memory of 2764	2208	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe	31

C:\Users\Admin\AppData\Local\Temp\8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe"
1⤵
- Enumerates connected drives
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2208
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\c8873a43dbc886c9ff19}"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2764

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/2208-4-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/2208-0-0x0000000000240000-0x000000000024F000-memory.dmp

Filesize
60KB

Download
memory/2208-7-0x0000000000230000-0x000000000023D000-memory.dmp

Filesize
52KB

Download
memory/2764-10-0x0000000074121000-0x0000000074122000-memory.dmp

Filesize
4KB

Download
memory/2764-12-0x0000000074120000-0x00000000746CB000-memory.dmp

Filesize
5.7MB

Download
memory/2764-14-0x0000000074120000-0x00000000746CB000-memory.dmp

Filesize
5.7MB

Download
memory/2764-13-0x0000000074120000-0x00000000746CB000-memory.dmp

Filesize
5.7MB

Download
memory/2764-11-0x0000000074120000-0x00000000746CB000-memory.dmp

Filesize
5.7MB

Download
memory/2764-15-0x0000000074120000-0x00000000746CB000-memory.dmp

Filesize
5.7MB

Download

Analysis

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