tofsee | 62c10c55dac6618eff4716e89de4bae41c429102fae8cae2f0ffc86a05ad82e2

General

Target

71efd5f8d2ad4c891d4d52f2cce17561_JaffaCakes118.exe
Size

144KB
MD5

71efd5f8d2ad4c891d4d52f2cce17561
SHA1

f34013094d0de6756de5c4979181e1a468836454
SHA256

62c10c55dac6618eff4716e89de4bae41c429102fae8cae2f0ffc86a05ad82e2
SHA512

0f8bab954b18c6e57a3bd0b1b685a5c4d4b194ab30c4b0e8a192cf57d9343c33e7b3f2ed9cb8a815f931b702c528d01ac58f30b8bfa3921854b285cd899bd7b0
SSDEEP

3072:XNfr+k4XY4h+PhzjzrOdt9lES2jbxWGqe:XNf14D+PhznrOdmSbGqe

Score

10^/10

tofsee discovery persistence trojan

Malware Config

Extracted

Family

tofsee

C2

91.218.39.211

188.130.237.44

91.204.162.103

188.165.132.183

rgtryhbgddtyh.biz

wertdghbyrukl.ch

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Checks computer location settings 2 TTPs 1 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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	71efd5f8d2ad4c891d4d52f2cce17561_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
3920	ylqdivow.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\ylqdivow.exe\""	71efd5f8d2ad4c891d4d52f2cce17561_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3920 set thread context of 1468	3920	ylqdivow.exe	90

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2720	1468	WerFault.exe	90

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	71efd5f8d2ad4c891d4d52f2cce17561_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ylqdivow.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4320 wrote to memory of 3920	4320	71efd5f8d2ad4c891d4d52f2cce17561_JaffaCakes118.exe	88
PID 4320 wrote to memory of 3920	4320	71efd5f8d2ad4c891d4d52f2cce17561_JaffaCakes118.exe	88
PID 4320 wrote to memory of 3920	4320	71efd5f8d2ad4c891d4d52f2cce17561_JaffaCakes118.exe	88
PID 3920 wrote to memory of 1468	3920	ylqdivow.exe	90
PID 3920 wrote to memory of 1468	3920	ylqdivow.exe	90
PID 3920 wrote to memory of 1468	3920	ylqdivow.exe	90
PID 3920 wrote to memory of 1468	3920	ylqdivow.exe	90
PID 3920 wrote to memory of 1468	3920	ylqdivow.exe	90
PID 4320 wrote to memory of 2600	4320	71efd5f8d2ad4c891d4d52f2cce17561_JaffaCakes118.exe	95
PID 4320 wrote to memory of 2600	4320	71efd5f8d2ad4c891d4d52f2cce17561_JaffaCakes118.exe	95
PID 4320 wrote to memory of 2600	4320	71efd5f8d2ad4c891d4d52f2cce17561_JaffaCakes118.exe	95

C:\Users\Admin\AppData\Local\Temp\71efd5f8d2ad4c891d4d52f2cce17561_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\71efd5f8d2ad4c891d4d52f2cce17561_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4320
- C:\Users\Admin\ylqdivow.exe
  "C:\Users\Admin\ylqdivow.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3920
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1468
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1468 -s 356
      4⤵
      Program crash
      PID:2720
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\3081.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2600

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1468 -ip 1468
1⤵
PID:3156

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\3081.bat

Filesize
266B

MD5
9eea7abfb4d49faa6f8a741045e6ce12

SHA1
82300c781f27ed47fb876837e85d06aed51573ec

SHA256
e48bf0d52c54ac76446b6a2ba61381d831fe120d33df23635ee6d8ff5c1c3687

SHA512
82e6a16ec9550b8f63c60ed49e18a96110a42eca1eaece84b46d1a3f8064468be5b91de3464f6470612ae17f7d0f4933d0a61a49e96b9b4276f0bb11990636e9

Download Submit
C:\Users\Admin\ylqdivow.exe

Filesize
30.2MB

MD5
c51a39bf1629cc6d4a56de883cd9e7a3

SHA1
28e47befdbf38565b0325ce4148bfb331fb10f20

SHA256
dd1be538a4c761e5c25202b374e627042fa5967aa6be4d8fad94524c8af3abfd

SHA512
6f02b9fe9b37e0f1b02ee2f40c14990c5a7bf918843dcfb6efc52bde74c0b5516d64ea67035c06aabe6318fc5f71555629d66978d767563d069c35806fb3d841

Download Submit
memory/1468-15-0x00000000003A0000-0x00000000003B2000-memory.dmp

Filesize
72KB

Download
memory/1468-12-0x00000000003A0000-0x00000000003B2000-memory.dmp

Filesize
72KB

Download
memory/1468-9-0x00000000003A0000-0x00000000003B2000-memory.dmp

Filesize
72KB

Download
memory/1468-26-0x0000000002680000-0x0000000002681000-memory.dmp

Filesize
4KB

Download
memory/1468-27-0x00000000003A0000-0x00000000003B2000-memory.dmp

Filesize
72KB

Download
memory/1468-28-0x00000000003A0000-0x00000000003B2000-memory.dmp

Filesize
72KB

Download
memory/3920-8-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/3920-7-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/3920-17-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4320-1-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4320-23-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4320-22-0x0000000000530000-0x0000000000542000-memory.dmp

Filesize
72KB

Download
memory/4320-0-0x0000000000530000-0x0000000000542000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads