r77 | 56290c2104affa1cf206123446540929c031486b6c3b3519b2de9a96963c9710

General

Target

9b9da065249e8fe54710e673923b7cd5_JaffaCakes118.exe
Size

35KB
MD5

9b9da065249e8fe54710e673923b7cd5
SHA1

855744b965629510b6929fa1d2e19cd6c796f030
SHA256

56290c2104affa1cf206123446540929c031486b6c3b3519b2de9a96963c9710
SHA512

4a38a4bc84911ece6042746aa631e5077373197b2cec269c3b89b7bbb4bf0b0fd992b080f69d7c1daab608b9653be9f48cbce0c9bb9ac6a89a3ca2ffc566d1f3
SSDEEP

768:Di/8POyOVXowzUyQ9EKa2Fi9k13ebvMSPIl1R3R:DNPlOVXowzUL+KOOMb0P33R

Score

10^/10

r77 evasion execution persistence privilege_escalation rootkit

Malware Config

Signatures

R77 family
r77
r77
r77 is an open-source, userland rootkit.
rootkit r77

r77 rootkit payload 1 IoCs

Detects the payload of the r77 rootkit.

resource	yara_rule
behavioral2/files/0x0007000000023cd6-35.dat	r77_payload

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4220	powershell.exe
2824	powershell.exe
644	powershell.exe
760	powershell.exe

Downloads MZ/PE file
Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4852	netsh.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	9b9da065249e8fe54710e673923b7cd5_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	$77-SystemProcessor.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77-SystemProcessor.exe	$77-SystemProcessor.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77-SystemProcessor.exe	$77-SystemProcessor.exe

Executes dropped EXE 1 IoCs

pid	Process
4104	$77-SystemProcessor.exe

Loads dropped DLL 11 IoCs

pid	Process
2168	Process not Found
644	powershell.exe
1064	Process not Found
760	powershell.exe
1720	Process not Found
4220	powershell.exe
3976	Process not Found
4496	Process not Found
2824	powershell.exe
2540	Process not Found
4852	netsh.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\$77-SystemProcessor = "C:\\ProgramData\\Microsoft\\$77-SystemProcessor.exe"	9b9da065249e8fe54710e673923b7cd5_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\$77-SystemProcessor = "C:\\ProgramData\\Microsoft\\$77-SystemProcessor.exe"	9b9da065249e8fe54710e673923b7cd5_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\$77-SystemProcessor = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\Startup\\$77-SystemProcessor.exe"	$77-SystemProcessor.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\$77-SystemProcessor = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\Startup\\$77-SystemProcessor.exe"	$77-SystemProcessor.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\$77-SystemProcessor = "C:\\ProgramData\\Microsoft\\$77-SystemProcessor.exe"	$77-SystemProcessor.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\$77-SystemProcessor = "C:\\ProgramData\\Microsoft\\$77-SystemProcessor.exe"	$77-SystemProcessor.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
25	raw.githubusercontent.com
26	raw.githubusercontent.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe

Suspicious behavior: EnumeratesProcesses 33 IoCs

pid	Process
548	9b9da065249e8fe54710e673923b7cd5_JaffaCakes118.exe
548	9b9da065249e8fe54710e673923b7cd5_JaffaCakes118.exe
548	9b9da065249e8fe54710e673923b7cd5_JaffaCakes118.exe
644	powershell.exe
644	powershell.exe
644	powershell.exe
644	powershell.exe
4104	$77-SystemProcessor.exe
4104	$77-SystemProcessor.exe
4104	$77-SystemProcessor.exe
760	powershell.exe
760	powershell.exe
760	powershell.exe
760	powershell.exe
4104	$77-SystemProcessor.exe
4104	$77-SystemProcessor.exe
4104	$77-SystemProcessor.exe
4220	powershell.exe
4220	powershell.exe
4220	powershell.exe
4220	powershell.exe
4104	$77-SystemProcessor.exe
4104	$77-SystemProcessor.exe
4104	$77-SystemProcessor.exe
2824	powershell.exe
2824	powershell.exe
2824	powershell.exe
2824	powershell.exe
4104	$77-SystemProcessor.exe
4104	$77-SystemProcessor.exe
4104	$77-SystemProcessor.exe
4852	netsh.exe
4852	netsh.exe

Suspicious use of AdjustPrivilegeToken 30 IoCs

description	pid	Process
Token: SeDebugPrivilege	548	9b9da065249e8fe54710e673923b7cd5_JaffaCakes118.exe
Token: SeDebugPrivilege	644	powershell.exe
Token: SeDebugPrivilege	4104	$77-SystemProcessor.exe
Token: SeDebugPrivilege	760	powershell.exe
Token: SeDebugPrivilege	4220	powershell.exe
Token: SeDebugPrivilege	2824	powershell.exe
Token: 33	4104	$77-SystemProcessor.exe
Token: SeIncBasePriorityPrivilege	4104	$77-SystemProcessor.exe
Token: 33	4104	$77-SystemProcessor.exe
Token: SeIncBasePriorityPrivilege	4104	$77-SystemProcessor.exe
Token: 33	4104	$77-SystemProcessor.exe
Token: SeIncBasePriorityPrivilege	4104	$77-SystemProcessor.exe
Token: 33	4104	$77-SystemProcessor.exe
Token: SeIncBasePriorityPrivilege	4104	$77-SystemProcessor.exe
Token: 33	4104	$77-SystemProcessor.exe
Token: SeIncBasePriorityPrivilege	4104	$77-SystemProcessor.exe
Token: 33	4104	$77-SystemProcessor.exe
Token: SeIncBasePriorityPrivilege	4104	$77-SystemProcessor.exe
Token: 33	4104	$77-SystemProcessor.exe
Token: SeIncBasePriorityPrivilege	4104	$77-SystemProcessor.exe
Token: 33	4104	$77-SystemProcessor.exe
Token: SeIncBasePriorityPrivilege	4104	$77-SystemProcessor.exe
Token: 33	4104	$77-SystemProcessor.exe
Token: SeIncBasePriorityPrivilege	4104	$77-SystemProcessor.exe
Token: 33	4104	$77-SystemProcessor.exe
Token: SeIncBasePriorityPrivilege	4104	$77-SystemProcessor.exe
Token: 33	4104	$77-SystemProcessor.exe
Token: SeIncBasePriorityPrivilege	4104	$77-SystemProcessor.exe
Token: 33	4104	$77-SystemProcessor.exe
Token: SeIncBasePriorityPrivilege	4104	$77-SystemProcessor.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 548 wrote to memory of 620	548	9b9da065249e8fe54710e673923b7cd5_JaffaCakes118.exe	85
PID 548 wrote to memory of 620	548	9b9da065249e8fe54710e673923b7cd5_JaffaCakes118.exe	85
PID 620 wrote to memory of 4024	620	cmd.exe	87
PID 620 wrote to memory of 4024	620	cmd.exe	87
PID 548 wrote to memory of 4104	548	9b9da065249e8fe54710e673923b7cd5_JaffaCakes118.exe	88
PID 548 wrote to memory of 4104	548	9b9da065249e8fe54710e673923b7cd5_JaffaCakes118.exe	88
PID 4104 wrote to memory of 1704	4104	$77-SystemProcessor.exe	101
PID 4104 wrote to memory of 1704	4104	$77-SystemProcessor.exe	101
PID 1704 wrote to memory of 644	1704	cmd.exe	103
PID 1704 wrote to memory of 644	1704	cmd.exe	103
PID 4104 wrote to memory of 3000	4104	$77-SystemProcessor.exe	106
PID 4104 wrote to memory of 3000	4104	$77-SystemProcessor.exe	106
PID 3000 wrote to memory of 760	3000	cmd.exe	108
PID 3000 wrote to memory of 760	3000	cmd.exe	108
PID 4104 wrote to memory of 1272	4104	$77-SystemProcessor.exe	109
PID 4104 wrote to memory of 1272	4104	$77-SystemProcessor.exe	109
PID 1272 wrote to memory of 4220	1272	cmd.exe	111
PID 1272 wrote to memory of 4220	1272	cmd.exe	111
PID 4104 wrote to memory of 3256	4104	$77-SystemProcessor.exe	113
PID 4104 wrote to memory of 3256	4104	$77-SystemProcessor.exe	113
PID 3256 wrote to memory of 2824	3256	cmd.exe	115
PID 3256 wrote to memory of 2824	3256	cmd.exe	115
PID 4104 wrote to memory of 4852	4104	$77-SystemProcessor.exe	116
PID 4104 wrote to memory of 4852	4104	$77-SystemProcessor.exe	116

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4024	attrib.exe

C:\Users\Admin\AppData\Local\Temp\9b9da065249e8fe54710e673923b7cd5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\9b9da065249e8fe54710e673923b7cd5_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:548
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c attrib -h -r -s "C:\ProgramData\Microsoft\$77-SystemProcessor.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:620
- - C:\Windows\system32\attrib.exe
    attrib -h -r -s "C:\ProgramData\Microsoft\$77-SystemProcessor.exe"
    3⤵
    - Views/modifies file attributes
    PID:4024
- C:\ProgramData\Microsoft\$77-SystemProcessor.exe
  "C:\ProgramData\Microsoft\$77-SystemProcessor.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4104
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /k start /b powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionPath 'C:\ProgramData\Microsoft'
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1704
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionPath 'C:\ProgramData\Microsoft'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Loads dropped DLL
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:644
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /k start /b powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77-SystemProcessor.exe'
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3000
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77-SystemProcessor.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Loads dropped DLL
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:760
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /k start /b powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionPath 'C:\ProgramData\Microsoft\r77-x64.dll'
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1272
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionPath 'C:\ProgramData\Microsoft\r77-x64.dll'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Loads dropped DLL
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4220
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /k start /b powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionPath 'C:\ProgramData\Microsoft\r77-x86.dll'
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3256
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionPath 'C:\ProgramData\Microsoft\r77-x86.dll'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Loads dropped DLL
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2824
- - C:\Windows\SYSTEM32\netsh.exe
    netsh firewall delete allowedprogram "C:\ProgramData\Microsoft\$77-SystemProcessor.exe"
    3⤵
    - Modifies Windows Firewall
    - Loads dropped DLL
    - Event Triggered Execution: Netsh Helper DLL
    - Suspicious behavior: EnumeratesProcesses
    PID:4852

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Event Triggered Execution

2

T1546

AppInit DLLs

1

T1546.010

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Event Triggered Execution

2

T1546

AppInit DLLs

1

T1546.010

Netsh Helper DLL

1

T1546.007

Defense Evasion

Hide Artifacts

1

T1564

Hidden Files and Directories

1

T1564.001

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\ProgramData\Microsoft\$77-SystemProcessor.exe

Filesize
35KB

MD5
9b9da065249e8fe54710e673923b7cd5

SHA1
855744b965629510b6929fa1d2e19cd6c796f030

SHA256
56290c2104affa1cf206123446540929c031486b6c3b3519b2de9a96963c9710

SHA512
4a38a4bc84911ece6042746aa631e5077373197b2cec269c3b89b7bbb4bf0b0fd992b080f69d7c1daab608b9653be9f48cbce0c9bb9ac6a89a3ca2ffc566d1f3

Download Submit
C:\ProgramData\Microsoft\r77-x64.dll

Filesize
147KB

MD5
1b8bd653321cf3cbc786e563555fbc75

SHA1
5638efe0476c8c1b74c6604db419be814d1d90a0

SHA256
919a332e85d7c32a6f0a1bdd15b211b8b273b73fe05a553ea0f230a0958586c7

SHA512
bafdbc8413828c5427983fa0e9403a2d9a88d0ad2f27f92842310852d273f2d2c9a0c6f9f64e1aac03fadf49f9a3bcf58c6b7c8b06debcce46536114cde0175b

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
64B

MD5
d8b9a260789a22d72263ef3bb119108c

SHA1
376a9bd48726f422679f2cd65003442c0b6f6dd5

SHA256
d69d47e428298f194850d14c3ce375e7926128a0bfb62c1e75940ab206f8fddc

SHA512
550314fab1e363851a7543c989996a440d95f7c9db9695cce5abaad64523f377f48790aa091d66368f50f941179440b1fa94448289ee514d5b5a2f4fe6225e9b

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
64B

MD5
446dd1cf97eaba21cf14d03aebc79f27

SHA1
36e4cc7367e0c7b40f4a8ace272941ea46373799

SHA256
a7de5177c68a64bd48b36d49e2853799f4ebcfa8e4761f7cc472f333dc5f65cf

SHA512
a6d754709f30b122112ae30e5ab22486393c5021d33da4d1304c061863d2e1e79e8aeb029cae61261bb77d0e7becd53a7b0106d6ea4368b4c302464e3d941cf7

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ovrqwjsc.abo.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/548-0-0x00007FFCBC1F3000-0x00007FFCBC1F5000-memory.dmp

Filesize
8KB

Download
memory/548-15-0x00007FFCBC1F0000-0x00007FFCBCCB1000-memory.dmp

Filesize
10.8MB

Download
memory/548-10-0x00007FFCBC1F0000-0x00007FFCBCCB1000-memory.dmp

Filesize
10.8MB

Download
memory/548-1-0x0000000000520000-0x0000000000530000-memory.dmp

Filesize
64KB

Download
memory/644-55-0x0000011F69430000-0x0000011F69452000-memory.dmp

Filesize
136KB

Download
memory/4104-27-0x00007FFCBC1F0000-0x00007FFCBCCB1000-memory.dmp

Filesize
10.8MB

Download
memory/4104-16-0x00007FFCBC1F0000-0x00007FFCBCCB1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads