buer | 1ba48c78b0826e7cd6a9d2a927e1575c561d23782a9c094cd3a9e6096297e937

General

Target

Scrit.exe
Size

172KB
MD5

98b738e1751444de2fbb696cb7a8dda5
SHA1

1ce99114d5957f451ccc3e50959ba1ecfcd3699a
SHA256

1ba48c78b0826e7cd6a9d2a927e1575c561d23782a9c094cd3a9e6096297e937
SHA512

0248e148d82e471506bbfd191717de41d8403dad499547ae7686d77833aa47b903fa2175947b08a5e0984b92a99fc81c47b2234fc3d112ec1198e6bdf64b4879
SSDEEP

1536:4gtwp3Ct5Bsh9atD6i4+WVEdXT9HNhmBhFOH3aaaaaaaaaaaaaaaaaaaaaaaaadb:HwtIx+61cAIp9BAVf2S

Score

10^/10

buer loader persistence

Malware Config

Extracted

Family

buer

C2

https://165.232.118.210/

Signatures

Buer
Buer is a new modular loader first seen in August 2019.
loader buer

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\730b1b02ced2a44263d9\\gennt.exe\""	gennt.exe

Buer Loader 3 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral1/memory/1324-4-0x0000000040000000-0x000000004000C000-memory.dmp	buer
behavioral1/memory/1324-7-0x0000000000220000-0x000000000022D000-memory.dmp	buer
behavioral1/memory/1324-0-0x0000000000230000-0x000000000023F000-memory.dmp	buer

Deletes itself 1 IoCs

pid	Process
2844	gennt.exe

Executes dropped EXE 1 IoCs

pid	Process
2844	gennt.exe

Loads dropped DLL 2 IoCs

pid	Process
1324	Scrit.exe
1324	Scrit.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)	\??\G:	gennt.exe
File opened (read-only)	\??\M:	gennt.exe
File opened (read-only)	\??\N:	gennt.exe
File opened (read-only)	\??\Z:	gennt.exe
File opened (read-only)	\??\R:	gennt.exe
File opened (read-only)	\??\S:	gennt.exe
File opened (read-only)	\??\T:	gennt.exe
File opened (read-only)	\??\W:	gennt.exe
File opened (read-only)	\??\H:	gennt.exe
File opened (read-only)	\??\L:	gennt.exe
File opened (read-only)	\??\O:	gennt.exe
File opened (read-only)	\??\Q:	gennt.exe
File opened (read-only)	\??\X:	gennt.exe
File opened (read-only)	\??\Y:	gennt.exe
File opened (read-only)	\??\P:	gennt.exe
File opened (read-only)	\??\U:	gennt.exe
File opened (read-only)	\??\A:	gennt.exe
File opened (read-only)	\??\B:	gennt.exe
File opened (read-only)	\??\E:	gennt.exe
File opened (read-only)	\??\I:	gennt.exe
File opened (read-only)	\??\J:	gennt.exe
File opened (read-only)	\??\K:	gennt.exe
File opened (read-only)	\??\V:	gennt.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2932	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2932	powershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1324 wrote to memory of 2844	1324	Scrit.exe	30
PID 1324 wrote to memory of 2844	1324	Scrit.exe	30
PID 1324 wrote to memory of 2844	1324	Scrit.exe	30
PID 1324 wrote to memory of 2844	1324	Scrit.exe	30
PID 2844 wrote to memory of 2932	2844	gennt.exe	31
PID 2844 wrote to memory of 2932	2844	gennt.exe	31
PID 2844 wrote to memory of 2932	2844	gennt.exe	31
PID 2844 wrote to memory of 2932	2844	gennt.exe	31

C:\Users\Admin\AppData\Local\Temp\Scrit.exe
"C:\Users\Admin\AppData\Local\Temp\Scrit.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1324
- C:\ProgramData\730b1b02ced2a44263d9\gennt.exe
  C:\ProgramData\730b1b02ced2a44263d9\gennt.exe "C:\Users\Admin\AppData\Local\Temp\Scrit.exe" ensgJJ
  2⤵
  - Modifies WinLogon for persistence
  - Deletes itself
  - Executes dropped EXE
  - Enumerates connected drives
  - Suspicious use of WriteProcessMemory
  PID:2844
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\730b1b02ced2a44263d9}"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2932

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\730b1b02ced2a44263d9\gennt.exe

Filesize
172KB

MD5
98b738e1751444de2fbb696cb7a8dda5

SHA1
1ce99114d5957f451ccc3e50959ba1ecfcd3699a

SHA256
1ba48c78b0826e7cd6a9d2a927e1575c561d23782a9c094cd3a9e6096297e937

SHA512
0248e148d82e471506bbfd191717de41d8403dad499547ae7686d77833aa47b903fa2175947b08a5e0984b92a99fc81c47b2234fc3d112ec1198e6bdf64b4879

Download Submit
C:\ProgramData\730b1b02ced2a44263d9\gennt.exe

Filesize
172KB

MD5
98b738e1751444de2fbb696cb7a8dda5

SHA1
1ce99114d5957f451ccc3e50959ba1ecfcd3699a

SHA256
1ba48c78b0826e7cd6a9d2a927e1575c561d23782a9c094cd3a9e6096297e937

SHA512
0248e148d82e471506bbfd191717de41d8403dad499547ae7686d77833aa47b903fa2175947b08a5e0984b92a99fc81c47b2234fc3d112ec1198e6bdf64b4879

Download Submit
C:\ProgramData\730b1b02ced2a44263d9\gennt.exe

Filesize
172KB

MD5
98b738e1751444de2fbb696cb7a8dda5

SHA1
1ce99114d5957f451ccc3e50959ba1ecfcd3699a

SHA256
1ba48c78b0826e7cd6a9d2a927e1575c561d23782a9c094cd3a9e6096297e937

SHA512
0248e148d82e471506bbfd191717de41d8403dad499547ae7686d77833aa47b903fa2175947b08a5e0984b92a99fc81c47b2234fc3d112ec1198e6bdf64b4879

Download Submit
\ProgramData\730b1b02ced2a44263d9\gennt.exe

Filesize
172KB

MD5
98b738e1751444de2fbb696cb7a8dda5

SHA1
1ce99114d5957f451ccc3e50959ba1ecfcd3699a

SHA256
1ba48c78b0826e7cd6a9d2a927e1575c561d23782a9c094cd3a9e6096297e937

SHA512
0248e148d82e471506bbfd191717de41d8403dad499547ae7686d77833aa47b903fa2175947b08a5e0984b92a99fc81c47b2234fc3d112ec1198e6bdf64b4879

Download Submit
\ProgramData\730b1b02ced2a44263d9\gennt.exe

Filesize
172KB

MD5
98b738e1751444de2fbb696cb7a8dda5

SHA1
1ce99114d5957f451ccc3e50959ba1ecfcd3699a

SHA256
1ba48c78b0826e7cd6a9d2a927e1575c561d23782a9c094cd3a9e6096297e937

SHA512
0248e148d82e471506bbfd191717de41d8403dad499547ae7686d77833aa47b903fa2175947b08a5e0984b92a99fc81c47b2234fc3d112ec1198e6bdf64b4879

Download Submit
memory/1324-4-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/1324-0-0x0000000000230000-0x000000000023F000-memory.dmp

Filesize
60KB

Download
memory/1324-7-0x0000000000220000-0x000000000022D000-memory.dmp

Filesize
52KB

Download
memory/2932-25-0x0000000073590000-0x0000000073B3B000-memory.dmp

Filesize
5.7MB

Download
memory/2932-26-0x0000000073590000-0x0000000073B3B000-memory.dmp

Filesize
5.7MB

Download
memory/2932-27-0x00000000026B0000-0x00000000026F0000-memory.dmp

Filesize
256KB

Download
memory/2932-28-0x00000000026B0000-0x00000000026F0000-memory.dmp

Filesize
256KB

Download
memory/2932-29-0x00000000026B0000-0x00000000026F0000-memory.dmp

Filesize
256KB

Download
memory/2932-30-0x0000000073590000-0x0000000073B3B000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads