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 3 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral2/memory/1052-4-0x0000000040000000-0x000000004005D000-memory.dmp	buer
behavioral2/memory/1052-0-0x0000000000930000-0x0000000000990000-memory.dmp	buer
behavioral2/memory/1052-7-0x00000000008D0000-0x000000000092E000-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
244	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)	\??\I:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\L:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\R:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\U:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\X:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\O:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\S:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\V:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\Y:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\A:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\H:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\M:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\N:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\P:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\T:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\B:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\E:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\G:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\J:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\K:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\Q:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\W:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe
File opened (read-only)	\??\Z:	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
244	powershell.exe
244	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	244	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1052 wrote to memory of 244	1052	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe	82
PID 1052 wrote to memory of 244	1052	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe	82
PID 1052 wrote to memory of 244	1052	935c24fca50f8ac28c040a8c3823df13_JaffaCakes118.exe	82

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:1052
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\581766f56ece523407be}"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:244

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

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ss0umygp.x02.psm1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/244-39-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/244-52-0x0000000007450000-0x0000000007458000-memory.dmp

Filesize
32KB

Download
memory/244-8-0x0000000074D0E000-0x0000000074D0F000-memory.dmp

Filesize
4KB

Download
memory/244-9-0x00000000048E0000-0x0000000004916000-memory.dmp

Filesize
216KB

Download
memory/244-11-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/244-10-0x0000000004F60000-0x0000000005588000-memory.dmp

Filesize
6.2MB

Download
memory/244-29-0x0000000070B20000-0x0000000070B6C000-memory.dmp

Filesize
304KB

Download
memory/244-14-0x0000000005830000-0x0000000005896000-memory.dmp

Filesize
408KB

Download
memory/244-13-0x00000000057C0000-0x0000000005826000-memory.dmp

Filesize
408KB

Download
memory/244-15-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/244-28-0x0000000006480000-0x00000000064B2000-memory.dmp

Filesize
200KB

Download
memory/244-25-0x00000000059A0000-0x0000000005CF4000-memory.dmp

Filesize
3.3MB

Download
memory/244-26-0x0000000005EA0000-0x0000000005EBE000-memory.dmp

Filesize
120KB

Download
memory/244-27-0x0000000005EE0000-0x0000000005F2C000-memory.dmp

Filesize
304KB

Download
memory/244-55-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/244-51-0x0000000007520000-0x000000000753A000-memory.dmp

Filesize
104KB

Download
memory/244-12-0x0000000004EF0000-0x0000000004F12000-memory.dmp

Filesize
136KB

Download
memory/244-40-0x00000000064C0000-0x00000000064DE000-memory.dmp

Filesize
120KB

Download
memory/244-41-0x00000000070B0000-0x0000000007153000-memory.dmp

Filesize
652KB

Download
memory/244-42-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/244-43-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/244-44-0x0000000007820000-0x0000000007E9A000-memory.dmp

Filesize
6.5MB

Download
memory/244-45-0x00000000071D0000-0x00000000071EA000-memory.dmp

Filesize
104KB

Download
memory/244-46-0x0000000007240000-0x000000000724A000-memory.dmp

Filesize
40KB

Download
memory/244-47-0x0000000007460000-0x00000000074F6000-memory.dmp

Filesize
600KB

Download
memory/244-48-0x00000000073D0000-0x00000000073E1000-memory.dmp

Filesize
68KB

Download
memory/244-49-0x0000000007400000-0x000000000740E000-memory.dmp

Filesize
56KB

Download
memory/244-50-0x0000000007410000-0x0000000007424000-memory.dmp

Filesize
80KB

Download
memory/1052-7-0x00000000008D0000-0x000000000092E000-memory.dmp

Filesize
376KB

Download
memory/1052-4-0x0000000040000000-0x000000004005D000-memory.dmp

Filesize
372KB

Download
memory/1052-56-0x0000000000400000-0x00000000004AF000-memory.dmp

Filesize
700KB

Download
memory/1052-0-0x0000000000930000-0x0000000000990000-memory.dmp

Filesize
384KB

Download

Analysis

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