buer | 611ebfdce09ab9d4966796e03fbe0a6e9bc4f6e4a8f81d941d0a5b39c0bab6ff

General

Target

935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
Size

627KB
MD5

935c24fca50f8ac28c040a8c3823df13
SHA1

c7a6e7ace50c47e1d3a54ffd50dbdab26ddcf4ce
SHA256

611ebfdce09ab9d4966796e03fbe0a6e9bc4f6e4a8f81d941d0a5b39c0bab6ff
SHA512

ee2f7213d4ce85865f947d9b6f5ded3535f6337c12f5141cb6ed58d48c20b257a613799e29fd9f5e5c7706d3d38f9e93119752dc3726e0d71b5dcc233fc4fec9
SSDEEP

12288:STTEy2Ryh8MnxERV8bpUt+AC0/KVFBMuqE:STc4NUVKpticFBMG

Score

10^/10

buer execution loader

Malware Config

Extracted

Family

buer

C2

https://bankcreditsign.com/

Signatures

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

Buer Loader 2 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral1/memory/1868-4-0x0000000040000000-0x000000004005D000-memory.dmp	buer
behavioral1/memory/1868-1-0x00000000004B0000-0x0000000000510000-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
1712	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)	\??\H:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\N:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\P:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\V:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\B:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\K:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\U:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\W:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\Z:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\A:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\J:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\L:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\M:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\O:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\X:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\Y:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\E:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\G:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\I:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\Q:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\R:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\S:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\T:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1712	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1712	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1868 wrote to memory of 1712	1868	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe	28
PID 1868 wrote to memory of 1712	1868	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe	28
PID 1868 wrote to memory of 1712	1868	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe	28
PID 1868 wrote to memory of 1712	1868	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe	28

C:\Users\Admin\AppData\Local\Temp\935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe"
1⤵
- Enumerates connected drives
- Suspicious use of WriteProcessMemory
PID:1868
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\f5bd81e3b59130ba837e}"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1712

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1712-10-0x00000000741E1000-0x00000000741E2000-memory.dmp

Filesize
4KB

Download
memory/1712-11-0x00000000741E0000-0x000000007478B000-memory.dmp

Filesize
5.7MB

Download
memory/1712-12-0x00000000741E0000-0x000000007478B000-memory.dmp

Filesize
5.7MB

Download
memory/1712-13-0x00000000741E0000-0x000000007478B000-memory.dmp

Filesize
5.7MB

Download
memory/1712-14-0x00000000741E0000-0x000000007478B000-memory.dmp

Filesize
5.7MB

Download
memory/1712-15-0x00000000741E0000-0x000000007478B000-memory.dmp

Filesize
5.7MB

Download
memory/1868-7-0x0000000000400000-0x00000000004AF000-memory.dmp

Filesize
700KB

Download
memory/1868-4-0x0000000040000000-0x000000004005D000-memory.dmp

Filesize
372KB

Download
memory/1868-1-0x00000000004B0000-0x0000000000510000-memory.dmp

Filesize
384KB

Download

Analysis

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