tofsee | b24a82191df95eaffd79dc0e4f7eac91c48cb7e37ade114c29218aef038ee6e3

General

Target

JaffaCakes118_6f27190edb3775f165617d13e32e3e90.exe
Size

117KB
MD5

6f27190edb3775f165617d13e32e3e90
SHA1

66bc0f60853a9b20ee761c09ae6f5af5a480b8ec
SHA256

b24a82191df95eaffd79dc0e4f7eac91c48cb7e37ade114c29218aef038ee6e3
SHA512

9ad1671828a155b7a9af9f7796cb4b632bb9249849107ac109ff778e99e232687b2b5f41f26e8f5811783632e11bdaa1e237b22fcd824315f915128e0c9664b2
SSDEEP

1536:MKxS+iac/mX84H4VG6AO4kRd+3j6VPvTW1YLakyPzk0O64Y3V:MZ+iZ/mX8UaG6SF3+VnpakyPzkXu

Score

10^/10

tofsee discovery persistence trojan

Malware Config

Extracted

Family

tofsee

C2

94.242.250.149

91.218.38.245

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

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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	JaffaCakes118_6f27190edb3775f165617d13e32e3e90.exe

Executes dropped EXE 1 IoCs

pid	Process
1284	ansfkxqy.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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\ansfkxqy.exe\""	JaffaCakes118_6f27190edb3775f165617d13e32e3e90.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1284 set thread context of 1292	1284	ansfkxqy.exe	84

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
1776	1292	WerFault.exe	84

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_6f27190edb3775f165617d13e32e3e90.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ansfkxqy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2760 wrote to memory of 1284	2760	JaffaCakes118_6f27190edb3775f165617d13e32e3e90.exe	83
PID 2760 wrote to memory of 1284	2760	JaffaCakes118_6f27190edb3775f165617d13e32e3e90.exe	83
PID 2760 wrote to memory of 1284	2760	JaffaCakes118_6f27190edb3775f165617d13e32e3e90.exe	83
PID 1284 wrote to memory of 1292	1284	ansfkxqy.exe	84
PID 1284 wrote to memory of 1292	1284	ansfkxqy.exe	84
PID 1284 wrote to memory of 1292	1284	ansfkxqy.exe	84
PID 1284 wrote to memory of 1292	1284	ansfkxqy.exe	84
PID 1284 wrote to memory of 1292	1284	ansfkxqy.exe	84
PID 2760 wrote to memory of 2016	2760	JaffaCakes118_6f27190edb3775f165617d13e32e3e90.exe	88
PID 2760 wrote to memory of 2016	2760	JaffaCakes118_6f27190edb3775f165617d13e32e3e90.exe	88
PID 2760 wrote to memory of 2016	2760	JaffaCakes118_6f27190edb3775f165617d13e32e3e90.exe	88

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6f27190edb3775f165617d13e32e3e90.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6f27190edb3775f165617d13e32e3e90.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2760
- C:\Users\Admin\ansfkxqy.exe
  "C:\Users\Admin\ansfkxqy.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1284
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1292
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1292 -s 356
      4⤵
      Program crash
      PID:1776
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\0634.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2016

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1292 -ip 1292
1⤵
PID:1860

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\0634.bat

Filesize
266B

MD5
704f84c3bc24181fa20e286125b38fc6

SHA1
6769cbb2b26e93c8acb4af7749f7feb3da003a0d

SHA256
7e48caee06c2b897ef8375cdb98d88eabe5520ac4ccf862af54f51db647d7097

SHA512
61d2551a1dc448d53b69b99c91f0b3c0e6bc636d0dfa0d5b3252b07bb9460ddc300f406450ba1a786ea88e9aa6a06111627a22c42e1d543d17058cc3e70485b9

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

Filesize
33.9MB

MD5
3f25cf557177ef3292ba85f5b49d2053

SHA1
3d59cfd7b95d20dbb0ed38e366a1f8d9db9beb6d

SHA256
9e64c887e21a9fac85c08548506a0342a7abce963989a4d25a10d9456a0afb36

SHA512
423501b617aa901b5fb98107354e3476beb35d89000609bebb5dfb34e9e6075d56b9a47035e7269986d9f9cd06a365f646a8804ae5fcc57f45548f87d1e1f7c9

Download Submit
memory/1284-17-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1284-10-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/1284-7-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/1284-9-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/1292-15-0x0000000000CD0000-0x0000000000CE2000-memory.dmp

Filesize
72KB

Download
memory/1292-11-0x0000000000CD0000-0x0000000000CE2000-memory.dmp

Filesize
72KB

Download
memory/1292-18-0x0000000000CD0000-0x0000000000CE2000-memory.dmp

Filesize
72KB

Download
memory/1292-28-0x0000000000FD0000-0x0000000000FD1000-memory.dmp

Filesize
4KB

Download
memory/1292-29-0x0000000000CD0000-0x0000000000CE2000-memory.dmp

Filesize
72KB

Download
memory/1292-30-0x0000000000CD0000-0x0000000000CE2000-memory.dmp

Filesize
72KB

Download
memory/2760-0-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/2760-2-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2760-25-0x0000000000700000-0x0000000000712000-memory.dmp

Filesize
72KB

Download
memory/2760-24-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2760-1-0x0000000000700000-0x0000000000712000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads