buer | a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698

General

Target

752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
Size

693KB
MD5

752be5fff55e3a059d9ec4be816d11a4
SHA1

e2f14b56875eb1e3ce4a2b3bd2ec92488eb51b84
SHA256

a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698
SHA512

b8c25e60c25303b212e986339d29f0b75fbaafacaef99848955b1e984603eb59102f00ac94cc22cc4c487fd9ecc34920f04f1599a543dd5643f8048c512f1b20
SSDEEP

12288:rl1Ey2RgKt9rtmapruAbE7qO4R1F2LjBioLAuny:rlSmK7tm8qO3O43FYBNLAuy

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
behavioral1/memory/2972-0-0x00000000004C0000-0x0000000000520000-memory.dmp	buer
behavioral1/memory/2972-4-0x0000000040000000-0x000000004005D000-memory.dmp	buer
behavioral1/memory/2972-5-0x0000000000360000-0x00000000003BE000-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
1848	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)	\??\R:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\S:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\T:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\U:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\W:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\E:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\G:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\M:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\V:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\Y:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\K:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\N:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\P:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\Q:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\L:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\O:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\X:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\A:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\B:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\H:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\I:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\J:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\Z:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1848	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1848	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2972 wrote to memory of 1848	2972	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe	28
PID 2972 wrote to memory of 1848	2972	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe	28
PID 2972 wrote to memory of 1848	2972	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe	28
PID 2972 wrote to memory of 1848	2972	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe	28

C:\Users\Admin\AppData\Local\Temp\752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe"
1⤵
- Enumerates connected drives
- Suspicious use of WriteProcessMemory
PID:2972
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\bf1230154a899aaa9fde}"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1848

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/1848-10-0x0000000074291000-0x0000000074292000-memory.dmp

Filesize
4KB

Download
memory/1848-11-0x0000000074290000-0x000000007483B000-memory.dmp

Filesize
5.7MB

Download
memory/1848-12-0x0000000074290000-0x000000007483B000-memory.dmp

Filesize
5.7MB

Download
memory/1848-13-0x0000000074290000-0x000000007483B000-memory.dmp

Filesize
5.7MB

Download
memory/1848-14-0x0000000074290000-0x000000007483B000-memory.dmp

Filesize
5.7MB

Download
memory/2972-0-0x00000000004C0000-0x0000000000520000-memory.dmp

Filesize
384KB

Download
memory/2972-4-0x0000000040000000-0x000000004005D000-memory.dmp

Filesize
372KB

Download
memory/2972-5-0x0000000000360000-0x00000000003BE000-memory.dmp

Filesize
376KB

Download
memory/2972-15-0x0000000000400000-0x00000000004BF000-memory.dmp

Filesize
764KB

Download

Analysis

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