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
behavioral2/memory/3884-4-0x0000000040000000-0x000000004000C000-memory.dmp	buer
behavioral2/memory/3884-0-0x0000000000550000-0x000000000055F000-memory.dmp	buer
behavioral2/memory/3884-7-0x0000000000540000-0x000000000054D000-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
2708	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)	\??\E:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\M:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\U:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\V:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\A:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\J:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\L:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\P:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\R:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\T:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\X:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\Y:	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)	\??\I:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\Q:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\S:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\W:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\K:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\N:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\O:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe
File opened (read-only)	\??\Z:	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
5048	3884	WerFault.exe	83

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 2 IoCs

pid	Process
2708	powershell.exe
2708	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2708	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3884 wrote to memory of 2708	3884	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe	94
PID 3884 wrote to memory of 2708	3884	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe	94
PID 3884 wrote to memory of 2708	3884	8b44470c7ff69ae671ff6e04550ee15f_JaffaCakes118.exe	94

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:3884
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\4b27a911e73521a11797}"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2708
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3884 -s 1240
  2⤵
  - Program crash
  PID:5048

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3884 -ip 3884
1⤵
PID:3336

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_jvshct1o.ujt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2708-40-0x0000000006C50000-0x0000000006C6E000-memory.dmp

Filesize
120KB

Download
memory/2708-55-0x0000000074100000-0x00000000748B0000-memory.dmp

Filesize
7.7MB

Download
memory/2708-28-0x0000000007820000-0x0000000007852000-memory.dmp

Filesize
200KB

Download
memory/2708-9-0x0000000003020000-0x0000000003056000-memory.dmp

Filesize
216KB

Download
memory/2708-11-0x0000000074100000-0x00000000748B0000-memory.dmp

Filesize
7.7MB

Download
memory/2708-10-0x0000000005760000-0x0000000005D88000-memory.dmp

Filesize
6.2MB

Download
memory/2708-12-0x0000000074100000-0x00000000748B0000-memory.dmp

Filesize
7.7MB

Download
memory/2708-13-0x0000000005730000-0x0000000005752000-memory.dmp

Filesize
136KB

Download
memory/2708-19-0x0000000005F30000-0x0000000005F96000-memory.dmp

Filesize
408KB

Download
memory/2708-20-0x0000000005FA0000-0x0000000006006000-memory.dmp

Filesize
408KB

Download
memory/2708-52-0x0000000007CB0000-0x0000000007CB8000-memory.dmp

Filesize
32KB

Download
memory/2708-25-0x0000000006050000-0x00000000063A4000-memory.dmp

Filesize
3.3MB

Download
memory/2708-26-0x0000000006660000-0x000000000667E000-memory.dmp

Filesize
120KB

Download
memory/2708-27-0x0000000006680000-0x00000000066CC000-memory.dmp

Filesize
304KB

Download
memory/2708-8-0x000000007410E000-0x000000007410F000-memory.dmp

Filesize
4KB

Download
memory/2708-29-0x000000006FFA0000-0x000000006FFEC000-memory.dmp

Filesize
304KB

Download
memory/2708-51-0x0000000007CD0000-0x0000000007CEA000-memory.dmp

Filesize
104KB

Download
memory/2708-39-0x0000000074100000-0x00000000748B0000-memory.dmp

Filesize
7.7MB

Download
memory/2708-41-0x0000000007860000-0x0000000007903000-memory.dmp

Filesize
652KB

Download
memory/2708-42-0x0000000074100000-0x00000000748B0000-memory.dmp

Filesize
7.7MB

Download
memory/2708-43-0x0000000074100000-0x00000000748B0000-memory.dmp

Filesize
7.7MB

Download
memory/2708-44-0x0000000007FE0000-0x000000000865A000-memory.dmp

Filesize
6.5MB

Download
memory/2708-45-0x0000000007990000-0x00000000079AA000-memory.dmp

Filesize
104KB

Download
memory/2708-46-0x0000000007A00000-0x0000000007A0A000-memory.dmp

Filesize
40KB

Download
memory/2708-47-0x0000000007C10000-0x0000000007CA6000-memory.dmp

Filesize
600KB

Download
memory/2708-48-0x0000000007B90000-0x0000000007BA1000-memory.dmp

Filesize
68KB

Download
memory/2708-49-0x0000000007BC0000-0x0000000007BCE000-memory.dmp

Filesize
56KB

Download
memory/2708-50-0x0000000007BD0000-0x0000000007BE4000-memory.dmp

Filesize
80KB

Download
memory/3884-7-0x0000000000540000-0x000000000054D000-memory.dmp

Filesize
52KB

Download
memory/3884-0-0x0000000000550000-0x000000000055F000-memory.dmp

Filesize
60KB

Download
memory/3884-4-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download

Analysis

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