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
behavioral2/memory/2320-0-0x0000000000750000-0x000000000075F000-memory.dmp	buer
behavioral2/memory/2320-4-0x00000000005A0000-0x00000000005AD000-memory.dmp	buer
behavioral2/memory/2320-6-0x0000000040000000-0x000000004000C000-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
4896	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)	\??\K:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\L:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\S:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\Z:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\A:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\G:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\J:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\Q:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\V:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\X:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\Y:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\E:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\H:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\M:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\R:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\U:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\W:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\B:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\N:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\O:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\I:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\P:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe
File opened (read-only)	\??\T:	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4744	2320	WerFault.exe	81

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 2 IoCs

pid	Process
4896	powershell.exe
4896	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4896	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2320 wrote to memory of 4896	2320	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe	90
PID 2320 wrote to memory of 4896	2320	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe	90
PID 2320 wrote to memory of 4896	2320	f447d7a2f7cfb24db6b3c42716b16457_JaffaCakes118.exe	90

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:2320
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\6faec8ef1be897ef7497}"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4896
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2320 -s 1208
  2⤵
  - Program crash
  PID:4744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 2320 -ip 2320
1⤵
PID:4952

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_h324fhbg.xpj.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2320-4-0x00000000005A0000-0x00000000005AD000-memory.dmp

Filesize
52KB

Download
memory/2320-6-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/2320-0-0x0000000000750000-0x000000000075F000-memory.dmp

Filesize
60KB

Download
memory/4896-27-0x00000000061D0000-0x000000000621C000-memory.dmp

Filesize
304KB

Download
memory/4896-28-0x00000000070B0000-0x00000000070E2000-memory.dmp

Filesize
200KB

Download
memory/4896-11-0x0000000074460000-0x0000000074C10000-memory.dmp

Filesize
7.7MB

Download
memory/4896-12-0x0000000074460000-0x0000000074C10000-memory.dmp

Filesize
7.7MB

Download
memory/4896-13-0x0000000005650000-0x0000000005672000-memory.dmp

Filesize
136KB

Download
memory/4896-15-0x0000000005760000-0x00000000057C6000-memory.dmp

Filesize
408KB

Download
memory/4896-14-0x00000000056F0000-0x0000000005756000-memory.dmp

Filesize
408KB

Download
memory/4896-9-0x0000000004920000-0x0000000004956000-memory.dmp

Filesize
216KB

Download
memory/4896-22-0x00000000057D0000-0x0000000005B24000-memory.dmp

Filesize
3.3MB

Download
memory/4896-26-0x0000000005EC0000-0x0000000005EDE000-memory.dmp

Filesize
120KB

Download
memory/4896-8-0x000000007446E000-0x000000007446F000-memory.dmp

Filesize
4KB

Download
memory/4896-30-0x0000000074460000-0x0000000074C10000-memory.dmp

Filesize
7.7MB

Download
memory/4896-29-0x0000000070300000-0x000000007034C000-memory.dmp

Filesize
304KB

Download
memory/4896-10-0x0000000004FD0000-0x00000000055F8000-memory.dmp

Filesize
6.2MB

Download
memory/4896-41-0x0000000074460000-0x0000000074C10000-memory.dmp

Filesize
7.7MB

Download
memory/4896-40-0x00000000064B0000-0x00000000064CE000-memory.dmp

Filesize
120KB

Download
memory/4896-42-0x00000000070F0000-0x0000000007193000-memory.dmp

Filesize
652KB

Download
memory/4896-44-0x0000000007210000-0x000000000722A000-memory.dmp

Filesize
104KB

Download
memory/4896-43-0x0000000007860000-0x0000000007EDA000-memory.dmp

Filesize
6.5MB

Download
memory/4896-45-0x0000000007270000-0x000000000727A000-memory.dmp

Filesize
40KB

Download
memory/4896-46-0x00000000074A0000-0x0000000007536000-memory.dmp

Filesize
600KB

Download
memory/4896-47-0x0000000007410000-0x0000000007421000-memory.dmp

Filesize
68KB

Download
memory/4896-48-0x0000000007440000-0x000000000744E000-memory.dmp

Filesize
56KB

Download
memory/4896-49-0x0000000007450000-0x0000000007464000-memory.dmp

Filesize
80KB

Download
memory/4896-50-0x0000000007560000-0x000000000757A000-memory.dmp

Filesize
104KB

Download
memory/4896-51-0x0000000007490000-0x0000000007498000-memory.dmp

Filesize
32KB

Download
memory/4896-54-0x0000000074460000-0x0000000074C10000-memory.dmp

Filesize
7.7MB

Download

Analysis

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