buer | 67c08d2a21a3ade47ed790aa65ef7cbb117e32300b432f5be97d5ff13c745247

General

Target

f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
Size

239KB
MD5

f447d7a2f7cfb24db6b3c42716b16457
SHA1

6c898d8bc1b2311859b34df36e0ba9c392a30b9f
SHA256

67c08d2a21a3ade47ed790aa65ef7cbb117e32300b432f5be97d5ff13c745247
SHA512

b303f0d106ce5fadda89346e78516ca8251dd532f1efa2540085b665d9de6dbba03c77bdc7007294a893f62a5e1fe22790513b97261eb6ba4eed1aac4d870e1a
SSDEEP

6144:BVNqZlMVBQ9Z8sugUnQsIqrQNIlK3cMCjq:tqZlMbQHugUQsI3NK0cMCjq

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/2648-4-0x0000000040000000-0x000000004000C000-memory.dmp	buer
behavioral1/memory/2648-0-0x0000000000270000-0x000000000027F000-memory.dmp	buer
behavioral1/memory/2648-7-0x00000000001D0000-0x00000000001DD000-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
2716	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)	\??\H:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\I:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\M:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\W:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\X:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\B:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\Q:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\R:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\U:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\Y:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\J:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\N:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\O:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\P:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\T:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\V:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\Z:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\K:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\E:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\G:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\L:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\S:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\A:	f447d7a2f7cfb24db6b3c42716b16457_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	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2716	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2716	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2648 wrote to memory of 2716	2648	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe	30
PID 2648 wrote to memory of 2716	2648	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe	30
PID 2648 wrote to memory of 2716	2648	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe	30
PID 2648 wrote to memory of 2716	2648	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe"
1⤵
- Enumerates connected drives
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2648
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\79c9aef5a629dab84b9a}"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2716

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/2648-4-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/2648-0-0x0000000000270000-0x000000000027F000-memory.dmp

Filesize
60KB

Download
memory/2648-7-0x00000000001D0000-0x00000000001DD000-memory.dmp

Filesize
52KB

Download
memory/2716-10-0x0000000074311000-0x0000000074312000-memory.dmp

Filesize
4KB

Download
memory/2716-11-0x0000000074310000-0x00000000748BB000-memory.dmp

Filesize
5.7MB

Download
memory/2716-12-0x0000000074310000-0x00000000748BB000-memory.dmp

Filesize
5.7MB

Download
memory/2716-13-0x0000000074310000-0x00000000748BB000-memory.dmp

Filesize
5.7MB

Download

Analysis

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