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
behavioral2/memory/1224-0-0x0000000000790000-0x00000000007F0000-memory.dmp	buer
behavioral2/memory/1224-4-0x0000000040000000-0x000000004005D000-memory.dmp	buer
behavioral2/memory/1224-7-0x0000000000730000-0x000000000078E000-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
3428	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:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\W:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\X:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\Q:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\R:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\S:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\U:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\H:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\J:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\O:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\P:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\V:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\Y:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\Z:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\K:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\M:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\N:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\A:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\B:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\E:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\G:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\L:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe
File opened (read-only)	\??\T:	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3428	powershell.exe
3428	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3428	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1224 wrote to memory of 3428	1224	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe	82
PID 1224 wrote to memory of 3428	1224	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe	82
PID 1224 wrote to memory of 3428	1224	752be5fff55e3a059d9ec4be816d11a4_JaffaCakes118.exe	82

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:1224
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\01d4b1fb3e9d0216f6cd}"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3428

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_xbbcu4wn.40p.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1224-4-0x0000000040000000-0x000000004005D000-memory.dmp

Filesize
372KB

Download
memory/1224-7-0x0000000000730000-0x000000000078E000-memory.dmp

Filesize
376KB

Download
memory/1224-56-0x0000000000400000-0x00000000004BF000-memory.dmp

Filesize
764KB

Download
memory/1224-0-0x0000000000790000-0x00000000007F0000-memory.dmp

Filesize
384KB

Download
memory/3428-28-0x0000000006B40000-0x0000000006B72000-memory.dmp

Filesize
200KB

Download
memory/3428-40-0x0000000075060000-0x0000000075810000-memory.dmp

Filesize
7.7MB

Download
memory/3428-12-0x0000000075060000-0x0000000075810000-memory.dmp

Filesize
7.7MB

Download
memory/3428-13-0x0000000005E30000-0x0000000005E52000-memory.dmp

Filesize
136KB

Download
memory/3428-10-0x00000000057A0000-0x0000000005DC8000-memory.dmp

Filesize
6.2MB

Download
memory/3428-20-0x0000000005FB0000-0x0000000006016000-memory.dmp

Filesize
408KB

Download
memory/3428-17-0x0000000005ED0000-0x0000000005F36000-memory.dmp

Filesize
408KB

Download
memory/3428-25-0x0000000006120000-0x0000000006474000-memory.dmp

Filesize
3.3MB

Download
memory/3428-26-0x0000000006590000-0x00000000065AE000-memory.dmp

Filesize
120KB

Download
memory/3428-27-0x00000000065D0000-0x000000000661C000-memory.dmp

Filesize
304KB

Download
memory/3428-29-0x0000000070E80000-0x0000000070ECC000-memory.dmp

Filesize
304KB

Download
memory/3428-9-0x0000000002FD0000-0x0000000003006000-memory.dmp

Filesize
216KB

Download
memory/3428-39-0x0000000006B90000-0x0000000006BAE000-memory.dmp

Filesize
120KB

Download
memory/3428-11-0x0000000075060000-0x0000000075810000-memory.dmp

Filesize
7.7MB

Download
memory/3428-41-0x0000000007790000-0x0000000007833000-memory.dmp

Filesize
652KB

Download
memory/3428-42-0x0000000075060000-0x0000000075810000-memory.dmp

Filesize
7.7MB

Download
memory/3428-43-0x0000000075060000-0x0000000075810000-memory.dmp

Filesize
7.7MB

Download
memory/3428-44-0x0000000007F00000-0x000000000857A000-memory.dmp

Filesize
6.5MB

Download
memory/3428-45-0x00000000078C0000-0x00000000078DA000-memory.dmp

Filesize
104KB

Download
memory/3428-46-0x0000000007930000-0x000000000793A000-memory.dmp

Filesize
40KB

Download
memory/3428-47-0x0000000007B40000-0x0000000007BD6000-memory.dmp

Filesize
600KB

Download
memory/3428-48-0x0000000007AC0000-0x0000000007AD1000-memory.dmp

Filesize
68KB

Download
memory/3428-49-0x0000000007AF0000-0x0000000007AFE000-memory.dmp

Filesize
56KB

Download
memory/3428-50-0x0000000007B00000-0x0000000007B14000-memory.dmp

Filesize
80KB

Download
memory/3428-51-0x0000000007C00000-0x0000000007C1A000-memory.dmp

Filesize
104KB

Download
memory/3428-52-0x0000000007BE0000-0x0000000007BE8000-memory.dmp

Filesize
32KB

Download
memory/3428-55-0x0000000075060000-0x0000000075810000-memory.dmp

Filesize
7.7MB

Download
memory/3428-8-0x000000007506E000-0x000000007506F000-memory.dmp

Filesize
4KB

Download

Analysis

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