buer | 1e06ef556ce681f14ed8fe9cfd3ebba0dfd2ec97602cfa39b99bec9a7437ed1a

General

Target

b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
Size

558KB
MD5

b1b1b46182236ad1ca363773c4a601df
SHA1

4563f3a7790e988c825796dfa0f3e1ec4ddb2d70
SHA256

1e06ef556ce681f14ed8fe9cfd3ebba0dfd2ec97602cfa39b99bec9a7437ed1a
SHA512

2f3f04cdb4c32f26ff86b09cb350934036f317413b0a494e4059af6d659719e8a129264a8c47bbcdfd88eb77060fb1030cca9d5f52f4f05c62e12ebfab99ed9f
SSDEEP

12288:zoy+ZLkjL3SzugvrnGPAMgpvsey0m9owzM:PE/u4GPnwv5y0m9oOM

Score

10^/10

buer execution loader upx

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/1784-5-0x0000000040000000-0x000000004005D000-memory.dmp	buer
behavioral1/memory/1784-1-0x0000000001E10000-0x0000000001E70000-memory.dmp	buer
behavioral1/memory/1784-8-0x0000000000360000-0x00000000003BE000-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
1936	powershell.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/1784-0-0x0000000000400000-0x00000000004C2000-memory.dmp	upx
behavioral1/memory/1784-17-0x0000000000400000-0x00000000004C2000-memory.dmp	upx

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)	\??\A:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\E:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\I:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\J:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\O:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\R:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\S:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\T:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\H:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\K:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\M:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\N:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\Q:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\Z:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\B:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\G:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\V:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\W:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\Y:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\L:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\P:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\U:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\X:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1936	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1936	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1784 wrote to memory of 1936	1784	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe	28
PID 1784 wrote to memory of 1936	1784	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe	28
PID 1784 wrote to memory of 1936	1784	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe	28
PID 1784 wrote to memory of 1936	1784	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe	28

C:\Users\Admin\AppData\Local\Temp\b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe"
1⤵
- Enumerates connected drives
- Suspicious use of WriteProcessMemory
PID:1784
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\b16ff15423ab23a3af17}"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1936

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/1784-0-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/1784-5-0x0000000040000000-0x000000004005D000-memory.dmp

Filesize
372KB

Download
memory/1784-1-0x0000000001E10000-0x0000000001E70000-memory.dmp

Filesize
384KB

Download
memory/1784-8-0x0000000000360000-0x00000000003BE000-memory.dmp

Filesize
376KB

Download
memory/1784-17-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/1936-11-0x0000000074501000-0x0000000074502000-memory.dmp

Filesize
4KB

Download
memory/1936-12-0x0000000074500000-0x0000000074AAB000-memory.dmp

Filesize
5.7MB

Download
memory/1936-13-0x0000000074500000-0x0000000074AAB000-memory.dmp

Filesize
5.7MB

Download
memory/1936-14-0x0000000074500000-0x0000000074AAB000-memory.dmp

Filesize
5.7MB

Download
memory/1936-15-0x0000000074500000-0x0000000074AAB000-memory.dmp

Filesize
5.7MB

Download
memory/1936-16-0x0000000074500000-0x0000000074AAB000-memory.dmp

Filesize
5.7MB

Download

Analysis

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