tofsee | 35e7dacaff1f83266879f8c1b8b87094b9afe181b397b3927561c74844e38d18

General

Target

JaffaCakes118_633a5b3f5abc1123356f2c859bcb8e50.exe
Size

144KB
MD5

633a5b3f5abc1123356f2c859bcb8e50
SHA1

da720c363b880dbc5623e9584b62523fb4fba909
SHA256

35e7dacaff1f83266879f8c1b8b87094b9afe181b397b3927561c74844e38d18
SHA512

9fb9e0aa1b2d263e7eec9b065c1af0e5a72ec68f9c4cfa27a3bd46d259f1416f5c60a82cf01e80cdddeddb1463569fb5981fb36d000c8e0ffdfd20af1f353c8e
SSDEEP

3072:uaVP6HaGT5SR8fGzIpYDx1cTqO9lkS2jbxWGqXJ:uaGoEpWxSbGqZ

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
Tofsee family
tofsee

Deletes itself 1 IoCs

pid	Process
2572	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2916	bcussmer.exe

Loads dropped DLL 2 IoCs

pid	Process
2764	JaffaCakes118_633a5b3f5abc1123356f2c859bcb8e50.exe
2764	JaffaCakes118_633a5b3f5abc1123356f2c859bcb8e50.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\bcussmer.exe\""	JaffaCakes118_633a5b3f5abc1123356f2c859bcb8e50.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2916 set thread context of 2904	2916	bcussmer.exe	32

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 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	JaffaCakes118_633a5b3f5abc1123356f2c859bcb8e50.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bcussmer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2544	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2544	PING.EXE

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2764	JaffaCakes118_633a5b3f5abc1123356f2c859bcb8e50.exe
2916	bcussmer.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2764 wrote to memory of 2916	2764	JaffaCakes118_633a5b3f5abc1123356f2c859bcb8e50.exe	31
PID 2764 wrote to memory of 2916	2764	JaffaCakes118_633a5b3f5abc1123356f2c859bcb8e50.exe	31
PID 2764 wrote to memory of 2916	2764	JaffaCakes118_633a5b3f5abc1123356f2c859bcb8e50.exe	31
PID 2764 wrote to memory of 2916	2764	JaffaCakes118_633a5b3f5abc1123356f2c859bcb8e50.exe	31
PID 2916 wrote to memory of 2904	2916	bcussmer.exe	32
PID 2916 wrote to memory of 2904	2916	bcussmer.exe	32
PID 2916 wrote to memory of 2904	2916	bcussmer.exe	32
PID 2916 wrote to memory of 2904	2916	bcussmer.exe	32
PID 2916 wrote to memory of 2904	2916	bcussmer.exe	32
PID 2916 wrote to memory of 2904	2916	bcussmer.exe	32
PID 2764 wrote to memory of 2572	2764	JaffaCakes118_633a5b3f5abc1123356f2c859bcb8e50.exe	33
PID 2764 wrote to memory of 2572	2764	JaffaCakes118_633a5b3f5abc1123356f2c859bcb8e50.exe	33
PID 2764 wrote to memory of 2572	2764	JaffaCakes118_633a5b3f5abc1123356f2c859bcb8e50.exe	33
PID 2764 wrote to memory of 2572	2764	JaffaCakes118_633a5b3f5abc1123356f2c859bcb8e50.exe	33
PID 2572 wrote to memory of 2544	2572	cmd.exe	35
PID 2572 wrote to memory of 2544	2572	cmd.exe	35
PID 2572 wrote to memory of 2544	2572	cmd.exe	35
PID 2572 wrote to memory of 2544	2572	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_633a5b3f5abc1123356f2c859bcb8e50.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_633a5b3f5abc1123356f2c859bcb8e50.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2764
- C:\Users\Admin\bcussmer.exe
  "C:\Users\Admin\bcussmer.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of UnmapMainImage
  - Suspicious use of WriteProcessMemory
  PID:2916
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2904
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\0386.bat" "
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2572
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2544

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

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\0386.bat

Filesize
266B

MD5
658a7261d5f5a3086abfeb116c73b6ee

SHA1
747a782634d64aea1819f59c90419b3c0df4c298

SHA256
85f8a28db4ca2f97df0601afadec84f4c84b3dc2c1a6ba45c326aa109658de5b

SHA512
979cfc269d12a4a663adf1f5d9d54206f42e10feff148c7656952f30f6954835ed7ff13a639e88858cc42904cef9cbb51d4deedc9dd622c234672e31fa3d6896

Download Submit
\Users\Admin\bcussmer.exe

Filesize
34.4MB

MD5
31858c5cd4b6a051fed6ea32bb9707f0

SHA1
1f1c5907289dc8c281bc4cadfe011817a4e1ba63

SHA256
993236322015382cdf5f09723eaacaeae4360b30f68948ec0c0297a7b7f5c70e

SHA512
8b6da7fab80c9b3551e6210eab74ea4924ebfd2aa96c51e9a9beaa840b11e6add187358e730be07ebb8d2fd970f69ca984a633dde588cd1eca23650504e31238

Download Submit
memory/2764-2-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2764-1-0x00000000003C0000-0x00000000003D2000-memory.dmp

Filesize
72KB

Download
memory/2764-34-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2904-19-0x00000000000D0000-0x00000000000E2000-memory.dmp

Filesize
72KB

Download
memory/2904-37-0x00000000000D0000-0x00000000000E2000-memory.dmp

Filesize
72KB

Download
memory/2904-13-0x00000000000D0000-0x00000000000E2000-memory.dmp

Filesize
72KB

Download
memory/2904-26-0x0000000000160000-0x0000000000161000-memory.dmp

Filesize
4KB

Download
memory/2904-22-0x00000000000D0000-0x00000000000E2000-memory.dmp

Filesize
72KB

Download
memory/2904-16-0x00000000000D0000-0x00000000000E2000-memory.dmp

Filesize
72KB

Download
memory/2904-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2904-38-0x00000000000D0000-0x00000000000E2000-memory.dmp

Filesize
72KB

Download
memory/2916-11-0x0000000000260000-0x0000000000272000-memory.dmp

Filesize
72KB

Download
memory/2916-21-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2916-12-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads