buer | 3d994a2f80a63f31bf56ddded5ed35f020c40c0324b3ab1935e08b15c25ba017

General

Target

fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
Size

239KB
MD5

fa0322fb70610d6e67585588184eda39
SHA1

7bf793587550abbc8a39d5cb26b1328483b17820
SHA256

3d994a2f80a63f31bf56ddded5ed35f020c40c0324b3ab1935e08b15c25ba017
SHA512

6615bd7060022ab8e6e36160955f1e09d6800dbe509b85aafb738f890c54c1568cbbfbd77451a55bdefc42dd2c1ad899d78ef4022a8cdcfadcd2d1b3f0baa56b
SSDEEP

6144:jh0jAkZaisNF2VZkltu4U6QsJFe88CGSzyTLNje:qckZaHD2stu4UfsJiCGSzuNje

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/1680-4-0x0000000000590000-0x000000000059D000-memory.dmp	buer
behavioral2/memory/1680-0-0x0000000000680000-0x000000000068F000-memory.dmp	buer
behavioral2/memory/1680-5-0x0000000040000000-0x000000004000C000-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
4780	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)	\??\S:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\V:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\Y:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\Z:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\B:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\H:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\K:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\M:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\P:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\U:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\W:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\G:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\N:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\Q:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\A:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\I:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\J:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\L:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\O:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\R:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\T:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\X:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
File opened (read-only)	\??\E:	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2124	1680	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	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4780	powershell.exe
4780	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4780	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1680 wrote to memory of 4780	1680	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe	86
PID 1680 wrote to memory of 4780	1680	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe	86
PID 1680 wrote to memory of 4780	1680	fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe	86

C:\Users\Admin\AppData\Local\Temp\fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fa0322fb70610d6e67585588184eda39_JaffaCakes118.exe"
1⤵
- Enumerates connected drives
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1680
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\67dc7842fb247b14fde6}"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4780
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1680 -s 844
  2⤵
  - Program crash
  PID:2124

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1680 -ip 1680
1⤵
PID:2108

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_22j025t2.hpp.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1680-0-0x0000000000680000-0x000000000068F000-memory.dmp

Filesize
60KB

Download
memory/1680-5-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/1680-4-0x0000000000590000-0x000000000059D000-memory.dmp

Filesize
52KB

Download
memory/4780-27-0x0000000006380000-0x00000000063B2000-memory.dmp

Filesize
200KB

Download
memory/4780-39-0x0000000006F70000-0x0000000006F8E000-memory.dmp

Filesize
120KB

Download
memory/4780-11-0x0000000005160000-0x0000000005788000-memory.dmp

Filesize
6.2MB

Download
memory/4780-12-0x0000000004EF0000-0x0000000004F12000-memory.dmp

Filesize
136KB

Download
memory/4780-13-0x0000000004F90000-0x0000000004FF6000-memory.dmp

Filesize
408KB

Download
memory/4780-14-0x0000000005790000-0x00000000057F6000-memory.dmp

Filesize
408KB

Download
memory/4780-9-0x00000000027D0000-0x0000000002806000-memory.dmp

Filesize
216KB

Download
memory/4780-24-0x0000000005800000-0x0000000005B54000-memory.dmp

Filesize
3.3MB

Download
memory/4780-25-0x0000000005DA0000-0x0000000005DBE000-memory.dmp

Filesize
120KB

Download
memory/4780-26-0x0000000005DD0000-0x0000000005E1C000-memory.dmp

Filesize
304KB

Download
memory/4780-8-0x000000007434E000-0x000000007434F000-memory.dmp

Filesize
4KB

Download
memory/4780-29-0x00000000701E0000-0x000000007022C000-memory.dmp

Filesize
304KB

Download
memory/4780-28-0x0000000074340000-0x0000000074AF0000-memory.dmp

Filesize
7.7MB

Download
memory/4780-10-0x0000000074340000-0x0000000074AF0000-memory.dmp

Filesize
7.7MB

Download
memory/4780-40-0x0000000006FA0000-0x0000000007043000-memory.dmp

Filesize
652KB

Download
memory/4780-41-0x0000000074340000-0x0000000074AF0000-memory.dmp

Filesize
7.7MB

Download
memory/4780-42-0x0000000074340000-0x0000000074AF0000-memory.dmp

Filesize
7.7MB

Download
memory/4780-43-0x0000000007710000-0x0000000007D8A000-memory.dmp

Filesize
6.5MB

Download
memory/4780-44-0x00000000070D0000-0x00000000070EA000-memory.dmp

Filesize
104KB

Download
memory/4780-45-0x0000000007140000-0x000000000714A000-memory.dmp

Filesize
40KB

Download
memory/4780-46-0x0000000007350000-0x00000000073E6000-memory.dmp

Filesize
600KB

Download
memory/4780-47-0x00000000072D0000-0x00000000072E1000-memory.dmp

Filesize
68KB

Download
memory/4780-48-0x0000000007300000-0x000000000730E000-memory.dmp

Filesize
56KB

Download
memory/4780-49-0x0000000007310000-0x0000000007324000-memory.dmp

Filesize
80KB

Download
memory/4780-50-0x0000000007410000-0x000000000742A000-memory.dmp

Filesize
104KB

Download
memory/4780-51-0x00000000073F0000-0x00000000073F8000-memory.dmp

Filesize
32KB

Download
memory/4780-54-0x0000000074340000-0x0000000074AF0000-memory.dmp

Filesize
7.7MB

Download

Analysis

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