tofsee | 83437c51b75f53b5798d45993b701ba8c51ffe00f8fb4f0529b503a389841f41

Analysis

max time kernel
95s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
13/09/2024, 17:12

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General

Target
de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe
Size 205KB
Sample240913-vq136aygpc
SHA256 83437c51b75f53b5798d45993b701ba8c51ffe00f8fb4f0529b503a389841f41
MD5 de8c712d027543582b3c5d08ab387bcc
SHA1 a692abe0f944ef065e3399f648e74d4af4b3c7d8
SHA512 cb8a1ee46dbffe192fc539bb000e4e1b96bbc0cd4e98cc29ae3e875da8aa138b90cf4646430e2b3365c11c4d68d7f36cdc9a6995fd9de5df34cdb89564908187
SSDEEP 6144:CgmdbOsHCU8TCOXlUS9f6mLTjr5jfD3tVuW7I:DISsHCU8T5f9imLndn30
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee discovery persistence trojan

Malware Config

Extracted

Family

tofsee

94.75.255.140
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-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
1576	coweuee.exe
1320	coweuee.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-1-5-21-355097885-2402257403-2971294179-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\coweuee.exe\" /r"	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4808 set thread context of 4080	4808	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe	83
PID 1576 set thread context of 1320	1576	coweuee.exe	85
PID 1320 set thread context of 2956	1320	coweuee.exe	86

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
828	2956	WerFault.exe	86

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

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	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	coweuee.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	coweuee.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 4808 wrote to memory of 4080	4808	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe	83
PID 4808 wrote to memory of 4080	4808	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe	83
PID 4808 wrote to memory of 4080	4808	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe	83
PID 4808 wrote to memory of 4080	4808	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe	83
PID 4808 wrote to memory of 4080	4808	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe	83
PID 4808 wrote to memory of 4080	4808	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe	83
PID 4808 wrote to memory of 4080	4808	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe	83
PID 4808 wrote to memory of 4080	4808	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe	83
PID 4080 wrote to memory of 1576	4080	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe	84
PID 4080 wrote to memory of 1576	4080	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe	84
PID 4080 wrote to memory of 1576	4080	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe	84
PID 1576 wrote to memory of 1320	1576	coweuee.exe	85
PID 1576 wrote to memory of 1320	1576	coweuee.exe	85
PID 1576 wrote to memory of 1320	1576	coweuee.exe	85
PID 1576 wrote to memory of 1320	1576	coweuee.exe	85
PID 1576 wrote to memory of 1320	1576	coweuee.exe	85
PID 1576 wrote to memory of 1320	1576	coweuee.exe	85
PID 1576 wrote to memory of 1320	1576	coweuee.exe	85
PID 1576 wrote to memory of 1320	1576	coweuee.exe	85
PID 1320 wrote to memory of 2956	1320	coweuee.exe	86
PID 1320 wrote to memory of 2956	1320	coweuee.exe	86
PID 1320 wrote to memory of 2956	1320	coweuee.exe	86
PID 1320 wrote to memory of 2956	1320	coweuee.exe	86
PID 1320 wrote to memory of 2956	1320	coweuee.exe	86
PID 4080 wrote to memory of 1948	4080	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe	89
PID 4080 wrote to memory of 1948	4080	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe	89
PID 4080 wrote to memory of 1948	4080	de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe	89

C:\Users\Admin\AppData\Local\Temp\de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4808
- C:\Users\Admin\AppData\Local\Temp\de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\de8c712d027543582b3c5d08ab387bcc_JaffaCakes118.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4080
- - C:\Users\Admin\coweuee.exe
    "C:\Users\Admin\coweuee.exe" /r
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1576
  - - C:\Users\Admin\coweuee.exe
      "C:\Users\Admin\coweuee.exe" /r
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:1320
    - - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2956
      - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2956 -s 324
        6⤵
        Program crash
        
        PID:828
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\1867.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1948

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 2956 -ip 2956
1⤵
PID:2336

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

1867.bat

Path C:\Users\Admin\AppData\Local\Temp\1867.bat
Size 117B
SHA256 d77181dd02a5945fbcc6461b1c9b398d070f3806551c88b2613a34f11257ed9e
MD5 b68fed4a997b0ad5918dd7353f95b07e
SHA1 86b76413663a7d95e1305a93766c9465f7434882
SHA512 a82f19cea07d7f4815c682fc0a441431d21656cddf5acc48df5a59b35e5c1b55ceadcea40626258ee3a6ad7797f94be99be2c7c5ad0cbc12e38faa837e2a3f7a
MD5 SHA1 SHA512

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coweuee.exe

Path C:\Users\Admin\coweuee.exe
Size 205KB
SHA256 83437c51b75f53b5798d45993b701ba8c51ffe00f8fb4f0529b503a389841f41
MD5 de8c712d027543582b3c5d08ab387bcc
SHA1 a692abe0f944ef065e3399f648e74d4af4b3c7d8
SHA512 cb8a1ee46dbffe192fc539bb000e4e1b96bbc0cd4e98cc29ae3e875da8aa138b90cf4646430e2b3365c11c4d68d7f36cdc9a6995fd9de5df34cdb89564908187
SSDEEP 6144:CgmdbOsHCU8TCOXlUS9f6mLTjr5jfD3tVuW7I:DISsHCU8T5f9imLndn30
MD5 SHA1 SHA512 SSDEEP

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memory/1320-13-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/2956-21-0x00000000007A0000-0x00000000007B0000-memory.dmp

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memory/2956-14-0x00000000007A0000-0x00000000007B0000-memory.dmp

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memory/2956-29-0x00000000007A0000-0x00000000007B0000-memory.dmp

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memory/2956-30-0x0000000000A60000-0x0000000000A61000-memory.dmp

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memory/2956-31-0x00000000007A0000-0x00000000007B0000-memory.dmp

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memory/2956-32-0x00000000007A0000-0x00000000007B0000-memory.dmp

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memory/4080-4-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/4080-0-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/4080-25-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/4080-2-0x0000000000400000-0x0000000000410000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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