tofsee | 7bc212272b8cf5e3abd1fe04a29aeae341553ab9b333798700b166cc294eb62f

General

Target

f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe
Size

146KB
MD5

f4a1a471691c36aa371295464b5482c5
SHA1

7bb69b619cfa281c60166bede7b22a0872738681
SHA256

7bc212272b8cf5e3abd1fe04a29aeae341553ab9b333798700b166cc294eb62f
SHA512

46d5e9496b8722a120a66382e11ccfa30e12b562828044647d8ed301a37768b9b34f370bdc158b963bacd6777bdedd2095a9f5e9e406ef3f45d8175e6e4bf858
SSDEEP

3072:AjDbOZg3wL70khr+yFt9bpJpvJlQz9Hck/:wOZd/lJbpz/QzRb/

Score

10^/10

tofsee discovery persistence trojan

Malware Config

Extracted

Family

tofsee

C2

64.20.54.234

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

Processes:

f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

Processes:

pcrfndm.exepcrfndm.exe

pid process

1856 pcrfndm.exe
4436 pcrfndm.exe

pid	process
1856	pcrfndm.exe
4436	pcrfndm.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\pcrfndm.exe\" /r"	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exepcrfndm.exepcrfndm.exe

description	pid	process	target process
PID 3800 set thread context of 2604	3800	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe
PID 1856 set thread context of 4436	1856	pcrfndm.exe	pcrfndm.exe
PID 4436 set thread context of 4372	4436	pcrfndm.exe	svchost.exe

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

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3136 4372 WerFault.exe svchost.exe

pid	pid_target	process	target process
3136	4372	WerFault.exe	svchost.exe

System Location Discovery: System Language Discovery 1 TTPs 6 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

Processes:

pcrfndm.execmd.exesvchost.exef4a1a471691c36aa371295464b5482c5_JaffaCakes118.exef4a1a471691c36aa371295464b5482c5_JaffaCakes118.exepcrfndm.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pcrfndm.exe
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	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pcrfndm.exe

Suspicious use of WriteProcessMemory 29 IoCs

Processes:

f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exef4a1a471691c36aa371295464b5482c5_JaffaCakes118.exepcrfndm.exepcrfndm.exe

description	pid	process	target process
PID 3800 wrote to memory of 2604	3800	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe
PID 3800 wrote to memory of 2604	3800	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe
PID 3800 wrote to memory of 2604	3800	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe
PID 3800 wrote to memory of 2604	3800	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe
PID 3800 wrote to memory of 2604	3800	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe
PID 3800 wrote to memory of 2604	3800	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe
PID 3800 wrote to memory of 2604	3800	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe
PID 3800 wrote to memory of 2604	3800	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe
PID 3800 wrote to memory of 2604	3800	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe
PID 2604 wrote to memory of 1856	2604	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe	pcrfndm.exe
PID 2604 wrote to memory of 1856	2604	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe	pcrfndm.exe
PID 2604 wrote to memory of 1856	2604	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe	pcrfndm.exe
PID 1856 wrote to memory of 4436	1856	pcrfndm.exe	pcrfndm.exe
PID 1856 wrote to memory of 4436	1856	pcrfndm.exe	pcrfndm.exe
PID 1856 wrote to memory of 4436	1856	pcrfndm.exe	pcrfndm.exe
PID 1856 wrote to memory of 4436	1856	pcrfndm.exe	pcrfndm.exe
PID 1856 wrote to memory of 4436	1856	pcrfndm.exe	pcrfndm.exe
PID 1856 wrote to memory of 4436	1856	pcrfndm.exe	pcrfndm.exe
PID 1856 wrote to memory of 4436	1856	pcrfndm.exe	pcrfndm.exe
PID 1856 wrote to memory of 4436	1856	pcrfndm.exe	pcrfndm.exe
PID 1856 wrote to memory of 4436	1856	pcrfndm.exe	pcrfndm.exe
PID 4436 wrote to memory of 4372	4436	pcrfndm.exe	svchost.exe
PID 4436 wrote to memory of 4372	4436	pcrfndm.exe	svchost.exe
PID 4436 wrote to memory of 4372	4436	pcrfndm.exe	svchost.exe
PID 4436 wrote to memory of 4372	4436	pcrfndm.exe	svchost.exe
PID 4436 wrote to memory of 4372	4436	pcrfndm.exe	svchost.exe
PID 2604 wrote to memory of 4912	2604	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe	cmd.exe
PID 2604 wrote to memory of 4912	2604	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe	cmd.exe
PID 2604 wrote to memory of 4912	2604	f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3800
- C:\Users\Admin\AppData\Local\Temp\f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\f4a1a471691c36aa371295464b5482c5_JaffaCakes118.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2604
- - C:\Users\Admin\pcrfndm.exe
    "C:\Users\Admin\pcrfndm.exe" /r
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1856
  - - C:\Users\Admin\pcrfndm.exe
      "C:\Users\Admin\pcrfndm.exe" /r
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:4436
    - - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:4372
      - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4372 -s 320
        6⤵
        Program crash
        
        PID:3136
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\6371.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4912

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4372 -ip 4372
1⤵
PID:412

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\6371.bat

Filesize
117B

MD5
07483ed1fe8e6772dc41958275c789cf

SHA1
ac7aef6b6ec99f4abdc7a588bde977dbb19821ef

SHA256
3f3eca4cd2c908052d61c77e9cc858479d9f21e172a41984c62bfc9351466097

SHA512
0f13d9532763c5a02d6df5b891b39ea2baed2f0023467ef22f357454c4e42448f885326f8c1e6de9502c01569b4cd1fd9bc2bd24a5793d0f04eb31efd333ece1

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

Filesize
146KB

MD5
f4a1a471691c36aa371295464b5482c5

SHA1
7bb69b619cfa281c60166bede7b22a0872738681

SHA256
7bc212272b8cf5e3abd1fe04a29aeae341553ab9b333798700b166cc294eb62f

SHA512
46d5e9496b8722a120a66382e11ccfa30e12b562828044647d8ed301a37768b9b34f370bdc158b963bacd6777bdedd2095a9f5e9e406ef3f45d8175e6e4bf858

Download Submit
memory/2604-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2604-2-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2604-24-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4372-13-0x00000000010E0000-0x00000000010F1000-memory.dmp

Filesize
68KB

Download
memory/4372-20-0x00000000010E0000-0x00000000010F1000-memory.dmp

Filesize
68KB

Download
memory/4372-28-0x00000000010E0000-0x00000000010F1000-memory.dmp

Filesize
68KB

Download
memory/4372-29-0x0000000002F30000-0x0000000002F31000-memory.dmp

Filesize
4KB

Download
memory/4372-30-0x00000000010E0000-0x00000000010F1000-memory.dmp

Filesize
68KB

Download
memory/4372-31-0x00000000010E0000-0x00000000010F1000-memory.dmp

Filesize
68KB

Download
memory/4436-12-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads