buer | db601f84fd39ba6be26e7a6c0cc1a74da424698244d9a1861b2f9fb980ab7dea

General

Target

Print.exe
Size

336KB
MD5

987e0fb2e2e25e7587fc73ad83dcd096
SHA1

8f84cdc64ff17e23cbc4f61cd37e3f7f4ec1b665
SHA256

db601f84fd39ba6be26e7a6c0cc1a74da424698244d9a1861b2f9fb980ab7dea
SHA512

41e544df2e12e0b195daab9ce2dce50d7067dca5f770950667ff3ca7aa2dfc4db4366528abeaccbb7712b8c24cc1f58eb73a2f0bd0852b586b8ba335e44ed37a
SSDEEP

6144:1FyuHrjLvBSC+ct43OGIKRvpjkpluW2TKTBBzHF:pSChGIevpjT8fB

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\\08e728f98fce36eb53e1\\gennt.exe\""	gennt.exe

Buer Loader 4 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral2/memory/2060-1-0x0000000000520000-0x000000000052D000-memory.dmp	buer
behavioral2/memory/2060-0-0x00000000023B0000-0x00000000023BF000-memory.dmp	buer
behavioral2/memory/2060-5-0x0000000040000000-0x000000004000C000-memory.dmp	buer
behavioral2/memory/2652-12-0x00000000005F0000-0x00000000005FF000-memory.dmp	buer

Executes dropped EXE 1 IoCs

pid	Process
2652	gennt.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1464	powershell.exe
1464	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1464	powershell.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2060	Print.exe
2652	gennt.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2060 wrote to memory of 2652	2060	Print.exe	91
PID 2060 wrote to memory of 2652	2060	Print.exe	91
PID 2060 wrote to memory of 2652	2060	Print.exe	91
PID 2652 wrote to memory of 1464	2652	gennt.exe	92
PID 2652 wrote to memory of 1464	2652	gennt.exe	92
PID 2652 wrote to memory of 1464	2652	gennt.exe	92

C:\Users\Admin\AppData\Local\Temp\Print.exe
"C:\Users\Admin\AppData\Local\Temp\Print.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2060
- C:\ProgramData\08e728f98fce36eb53e1\gennt.exe
  C:\ProgramData\08e728f98fce36eb53e1\gennt.exe "C:\Users\Admin\AppData\Local\Temp\Print.exe" ensgJJ
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2652
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\08e728f98fce36eb53e1}"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1464

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\08e728f98fce36eb53e1\gennt.exe

Filesize
336KB

MD5
987e0fb2e2e25e7587fc73ad83dcd096

SHA1
8f84cdc64ff17e23cbc4f61cd37e3f7f4ec1b665

SHA256
db601f84fd39ba6be26e7a6c0cc1a74da424698244d9a1861b2f9fb980ab7dea

SHA512
41e544df2e12e0b195daab9ce2dce50d7067dca5f770950667ff3ca7aa2dfc4db4366528abeaccbb7712b8c24cc1f58eb73a2f0bd0852b586b8ba335e44ed37a

Download Submit
C:\ProgramData\08e728f98fce36eb53e1\gennt.exe

Filesize
336KB

MD5
987e0fb2e2e25e7587fc73ad83dcd096

SHA1
8f84cdc64ff17e23cbc4f61cd37e3f7f4ec1b665

SHA256
db601f84fd39ba6be26e7a6c0cc1a74da424698244d9a1861b2f9fb980ab7dea

SHA512
41e544df2e12e0b195daab9ce2dce50d7067dca5f770950667ff3ca7aa2dfc4db4366528abeaccbb7712b8c24cc1f58eb73a2f0bd0852b586b8ba335e44ed37a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ohtpxg5d.ufc.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1464-31-0x0000000005BF0000-0x0000000005C56000-memory.dmp

Filesize
408KB

Download
memory/1464-37-0x0000000004D30000-0x0000000004D40000-memory.dmp

Filesize
64KB

Download
memory/1464-61-0x0000000074690000-0x0000000074E40000-memory.dmp

Filesize
7.7MB

Download
memory/1464-19-0x0000000074690000-0x0000000074E40000-memory.dmp

Filesize
7.7MB

Download
memory/1464-21-0x0000000004D30000-0x0000000004D40000-memory.dmp

Filesize
64KB

Download
memory/1464-20-0x0000000004C50000-0x0000000004C86000-memory.dmp

Filesize
216KB

Download
memory/1464-22-0x0000000004D30000-0x0000000004D40000-memory.dmp

Filesize
64KB

Download
memory/1464-23-0x0000000005370000-0x0000000005998000-memory.dmp

Filesize
6.2MB

Download
memory/1464-24-0x0000000005270000-0x0000000005292000-memory.dmp

Filesize
136KB

Download
memory/1464-30-0x0000000005A10000-0x0000000005A76000-memory.dmp

Filesize
408KB

Download
memory/1464-58-0x00000000078E0000-0x00000000078E8000-memory.dmp

Filesize
32KB

Download
memory/1464-57-0x0000000007900000-0x000000000791A000-memory.dmp

Filesize
104KB

Download
memory/1464-36-0x00000000062C0000-0x00000000062DE000-memory.dmp

Filesize
120KB

Download
memory/1464-56-0x0000000004D30000-0x0000000004D40000-memory.dmp

Filesize
64KB

Download
memory/1464-38-0x0000000006880000-0x00000000068B2000-memory.dmp

Filesize
200KB

Download
memory/1464-39-0x0000000070530000-0x000000007057C000-memory.dmp

Filesize
304KB

Download
memory/1464-49-0x0000000006860000-0x000000000687E000-memory.dmp

Filesize
120KB

Download
memory/1464-50-0x0000000007C10000-0x000000000828A000-memory.dmp

Filesize
6.5MB

Download
memory/1464-51-0x00000000075C0000-0x00000000075DA000-memory.dmp

Filesize
104KB

Download
memory/1464-52-0x0000000007640000-0x000000000764A000-memory.dmp

Filesize
40KB

Download
memory/1464-53-0x0000000007840000-0x00000000078D6000-memory.dmp

Filesize
600KB

Download
memory/1464-54-0x0000000074690000-0x0000000074E40000-memory.dmp

Filesize
7.7MB

Download
memory/1464-55-0x00000000077F0000-0x00000000077FE000-memory.dmp

Filesize
56KB

Download
memory/2060-5-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/2060-1-0x0000000000520000-0x000000000052D000-memory.dmp

Filesize
52KB

Download
memory/2060-0-0x00000000023B0000-0x00000000023BF000-memory.dmp

Filesize
60KB

Download
memory/2652-12-0x00000000005F0000-0x00000000005FF000-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads