tofsee | 04543d61bba615b50f871612ac8124907b8493fae002f29d614fa2032643705d

Analysis

max time kernel
148s
max time network
120s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
17/04/2024, 13:33

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General

Target
7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe
Size 229KB
Sample240417-qtr77shf89
SHA256 7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8
MD5 ddb3205a92ff18ae17b3f9f93c7b197c
SHA1 b77c666a2d7b1f63ba08316f9a221be6ac1f786a
SHA512 db659ead4fd2ed186f221adf5bb9ab5b686253454eeb307ba247a99d8026c009d72ed11473d4622146c7b6cf59f445ad3b020ac3394d3f61af5bfd385b43c334
SSDEEP 3072:lnUQviqZALXadUs0vEJimn1K29YbqYZgpLneYDR89fJ5j3UxS6MeILYS:lnUzPjflapLnsdT3U2eILY
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

vanaheim.cn
jotunheim.name

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
3516	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\xfgokblv\ImagePath = "C:\\Windows\\SysWOW64\\xfgokblv\\lffxakoa.exe"	svchost.exe

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-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe

Deletes itself 1 IoCs

pid	Process
4760	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
5028	lffxakoa.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\config\systemprofile:.repos	svchost.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile:.repos	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5028 set thread context of 4760	5028	lffxakoa.exe	98

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
4400	sc.exe
5004	sc.exe
2468	sc.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2596	4192	WerFault.exe	83
3540	5028	WerFault.exe	97

Modifies data under HKEY_USERS 3 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Control Panel\Buses	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 6cbf373c3b7d0d0324edb47d450dd49d084297dce82e72baa4c0b48ac3db9a1d4ae2503e87cd945d24edb47d470dd49d024195daf71261adc06d04fda6e22673bbc9154961cda5681cda854e7439e6a8644490bdb67c2dea955405c4f08d3c74bbc4103d29fca16d12db83457034e69d084295d9e13f4bb4c06d00fdadfd5425dc99430e34ffad6a249ec60b1b79bdf0012dd985b67f20ee975a00c8c4e13b7e85c12b496da0f15d15d88c4a753ee4a9571cf459a4b1149f14f46afdc48d541ce4ad744a6bbfff02579fc27d440dd49d642df4dc177feb98a46d34fdc741461ee4ad743c32ffba6c16df9a4c7c39faa85c2df4bd844d14dda46d34fdc48d541de4ad743d04cd945d24edb47d440dd49d642df4bd844d14dda46d34fdc48d541de4ad743de6cc945d	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = ecf2363c467d0d0324edb47d450dd49d134286d6db3e66aba46d34fdc48d541d853e46c241cd945d24ee786f470dd49d651bc693b57f26f3955500d3f1b5541de4ad743d04cd945d24edb47d440dd49d642df4bd844d14dda46d34fdc48d541de4ad743d04cd945d24edb47d440dd49d64cff5bd8465a09ca51484649a8d541de4ac743d04a1fb3e4581d71b230d791d132aa27384f67da4d7ef34fdc48d541de4ae743d04abf83c439eeb083469d4ad644f9bcfea1270bcd00834ccf1b5632cd79d400f31cdfd3924df8544733cedac5d19f4d5ed127db9a44005c8f4bb622adc994d0f04a1fb3c4088c6222d69d4a9644484bdb27b2ced975900c4f18d276f92f2005469a8946e11df864f7235e3af64419bdee5214ba9cd0051fdf5b86c2ad59e44093cf4944d9eacb5fff4948a9d642df4bf844d1494e05f03c5fcbf6c25dc9d403d04cd94682922e579440dd49d642df4be844d14f94d5c92fdd7ce559e54342a3d04cd945c24edb40d2b7fa0c2074b93bd844d14dda46d345a283c8419e4ad743d04cd945e24edb48d000dd49d286cf53e34d44adda46d34fcc48d546e90cc06495bbee62b24edb47d440dd422a81541f8844d14dda7a126fec48d541c89d8074d61a1fc384d809a1f210dd49d642df4bd844d14dda46d34fdc48d541de4ad743d04cd945d24edb47d440dd49d642df4bd844d14dda46d34fdc48d541d5fac743dbc6cd65ca75d2d23440dd49d452df4bde6217daed032579ba38d541de4ad743d8239d23e50edb47d44aaa29d672df4bdf72866abcd0e518ec4bc6e798ade16512abefb2f469e9a132179efaf5e4f9893f73d75b0c70244d3aae82026d0970e586ae3e72d4580dc1c317efaf2164acf85be3e76b189155691eafe247c89c5154877e3fb2f43d6854b7e6eb6f14a4c96c8f72875a98a02469ac4fd316f8dc2103d3dfda45dd4bcf47cc7bd4dc3642df4bda44d14ddd41e5989b4d2377b83ad743d04cd945d352477122e0fd49d648a82bd874d14ddca195c8fa1ec306ee49c433d77a0e02d7b9ed10f3268a6c20c4280d0e52478ddd700408deae13d6b8183175269f7a16513edc0142968bbe8107297d2ea2371bed06d07cdc4f93d7081c201495bbff13c40ed874d4479bdf0014281c9db3a66b4d00834cef48d27788ac92b496da0f1325199c77d723dd4f90a5eabd1ed3e60dd965d0dd3f6b96033d483470636fdad7316d980537423e0a65c03cc93bc632ce69c430cd3f0a36026dc83460b2af8a27316db8f456a3fe4b35619c393b67d2fef94551acbf3a3662fd683460f36f6a66d1cc3824a6a3fe6ad4a1fc68dbf7c21eb8a5c01c9eaba6433d596450832e3a56810c3834c6a3cefac5d14da85b16325ef924305cdffbc6d24ca95411335ffa37315dd8f457523e6ac5c03c58cbd6325ec9f5f04c4eab56c33d5944c1335fea76615d48153703bfaae5d03c784bf7c2de88a5902d3f7b47a29d496460c32e3ac6a0ad58053763ce5a6561eda84b46320f3925605c4fda36133d598431335fea56616dd8c53733cfaae5103c58eb37626ed9c4303cbeab86433d19d4f0f34f5ba6a12c3814c6a38e5a6561cc293b57922f397581acef1b6662cd283450932e3a76b0ade8246773afaaf5718da8caa7c23e99f5e03d3f6be6133d583450a33f6ac640adf874e6a39e7b3531ccf85bd6325ed904305c4f0a36529d6964c092affa46d0adb8d537c3defa55003c68db46323ed8a5904c6f3b97a25d683400f2af9a66615dd8d537234faa54a18c5bde0236782d0045998abf8201dd59d74596abecb3c5099d1103479a79d512d83d5eb246782c8044789c4bc6d2eca9d5a0b2afca7681fdc8d4b6a3fe5ab4a1fda8fb47625e5914307d3fdbe7a25d4ad2c2c46cc17edbdb3b47d440dd59d642d87d0f03d4bafc11946fdc48d541de4ad04f36b1e185d24edb4da320dd79d642db9d8f73e75bac14d4098a9fd3b6f85df1d517dedf0384288c60f2169dee9014084d2f62c66b4c8141499a1eb316f96c8101d29eda07315db9a487407baf2100d95d1e82263b8c04d19dd92de6d24c9e4240c24a9f13b419fc6182007bcf8085ddac4e5257bb28a0e5b90ebe531719482014e2ba0f53448c2d0182268a6b2004892d8f66024ef8a054090a887ec43a4acf78d9d93945d24edb57d440da7f0105dabd5e13f66dda46d34fdc48d3433d53fb03d04cd94fa52edb77d440da1f30f439bcaea4741b3cf035b8aaa873a72908d1f536bbafa576d83c21c2864b0bd254990cfe13e67d7c90c5d91a6e22c3d91c3154b65a4f83c4681d1772a62a0bd050d82dce82470fdc90c5d91a6e22c17a5ce175271a3e07d6d83d51e3064a2f86e439b9de92c7db1c6024cddace82678eec31b4924ace23c4d81d51f2868deee115e84d8ea2971b9ae235bdda5ee377291c300374aa2b42e518edc5d317eb1ef6e4f95d9a42c70b9d608478ecee93b7897c3534924a5f52b41cdd55d3d6cbcf20b27109d784d976d3d3334fdc48d761de4ad17526aabfd3a098edb0d3d0dd49d642ddbb44e64efdca46d345ab28d571de4ad571c2baffd330b8fd50e2c07ded1257ea0e2c7025a9bed2a6bad85d91c20ca82185c77b9b93e4b83d21423079bc8307da1e9db0e5b93e22473c0eaa239748ac8066267abf3734782da1b4e4b9dcf3779abfecb035294e3501ad2a7e23a7b8dca2b5f68a2f7734782da1b4e5e91de2b63b0e2c7025a9bed2a09d3ebee3b7382c4136269bee6734782da1b4e4e9bd32264b3e2d0024b9cf43d78a4f9875e74828d2f1d25edb93b04c9f83c17598bde2b63b2f4c312449cf02514a0cef93c788aa7541d24edd7126aabfd3a1b599bc2257da4f1dd70309bed3f67a99bce1b53a2e4333761a1e7382ecd945d6464b2bd3f0dd095e72c60fd802175ae90d21752aaeb3d7a5b9dd5096cc49440792df0db2d7fa7e9db0e5b93e22473dd9987743dc48d005561a39e5467a2fa3b0d4a8bc92b72b5edd4014de0803e71be8bc31042a7e23a7b4d8a9e7d04cd9418287eb197440dd49da46d34fde7227abb8dca0b49abf2356d5481cd6000abfd2f17598bde2b63b2f4c34734fd844d5294ceeb3d17ee8e115e6ca2b4790c8ed509642997d22a6bbdfadb195b82e53d64b19da47423c4893b68509dc1097baefb3302449397075dd499c7025a9bed2a6ba98bd2154db4e12d1d2082c10974b8e02207429adb2d6afed8e7257bfd802e7bb382c41342b0e22b7c549dd80404d39459084c87c93b6ebbf3c2045382f42c60b5ce	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4192 wrote to memory of 5056	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	85
PID 4192 wrote to memory of 5056	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	85
PID 4192 wrote to memory of 5056	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	85
PID 4192 wrote to memory of 4840	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	89
PID 4192 wrote to memory of 4840	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	89
PID 4192 wrote to memory of 4840	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	89
PID 4192 wrote to memory of 4400	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	91
PID 4192 wrote to memory of 4400	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	91
PID 4192 wrote to memory of 4400	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	91
PID 4192 wrote to memory of 5004	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	93
PID 4192 wrote to memory of 5004	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	93
PID 4192 wrote to memory of 5004	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	93
PID 4192 wrote to memory of 2468	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	95
PID 4192 wrote to memory of 2468	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	95
PID 4192 wrote to memory of 2468	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	95
PID 5028 wrote to memory of 4760	5028	lffxakoa.exe	98
PID 5028 wrote to memory of 4760	5028	lffxakoa.exe	98
PID 5028 wrote to memory of 4760	5028	lffxakoa.exe	98
PID 5028 wrote to memory of 4760	5028	lffxakoa.exe	98
PID 5028 wrote to memory of 4760	5028	lffxakoa.exe	98
PID 4192 wrote to memory of 3516	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	100
PID 4192 wrote to memory of 3516	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	100
PID 4192 wrote to memory of 3516	4192	7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe	100

C:\Users\Admin\AppData\Local\Temp\7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe
"C:\Users\Admin\AppData\Local\Temp\7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4192
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xfgokblv\
  2⤵
  PID:5056
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lffxakoa.exe" C:\Windows\SysWOW64\xfgokblv\
  2⤵
  PID:4840
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xfgokblv binPath= "C:\Windows\SysWOW64\xfgokblv\lffxakoa.exe /d\"C:\Users\Admin\AppData\Local\Temp\7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4400
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xfgokblv "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:5004
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xfgokblv
  2⤵
  - Launches sc.exe
  PID:2468
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  - Modifies Windows Firewall
  PID:3516
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4192 -s 660
  2⤵
  - Program crash
  PID:2596

C:\Windows\SysWOW64\xfgokblv\lffxakoa.exe
C:\Windows\SysWOW64\xfgokblv\lffxakoa.exe /d"C:\Users\Admin\AppData\Local\Temp\7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5028
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - Drops file in System32 directory
  - Modifies data under HKEY_USERS
  PID:4760
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5028 -s 572
  2⤵
  - Program crash
  PID:3540

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 5028 -ip 5028
1⤵
PID:5088

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4192 -ip 4192
1⤵
PID:4764

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

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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lffxakoa.exe

Path C:\Users\Admin\AppData\Local\Temp\lffxakoa.exe
Size 12.7MB
SHA256 5ea3fbe88ceb121d1feefc50db75f3195d2a3c3194d4b648c5ba9821a9c64db5
MD5 f6c1f5cf96856eb52e5c2f482159f83d
SHA1 e54e56db5be29b7d8d1fe695448e584d6721db94
SHA512 4cbf29c6bcdf7ac53b24af889782171091e51e9b6d14eb1e3ac709407d41f71cdc100fdefe2342026d085e458c272cf4bcab60f51f62e49bfefd29a4685eb257
SSDEEP 49152:CZ6qccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc0:CY
MD5 SHA1 SHA512 SSDEEP

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memory/4192-16-0x0000000000400000-0x000000000043E000-memory.dmp

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memory/4192-2-0x00000000005A0000-0x00000000005B3000-memory.dmp

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memory/4192-3-0x0000000000400000-0x000000000043E000-memory.dmp

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memory/4192-1-0x00000000005C0000-0x00000000006C0000-memory.dmp

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memory/4760-20-0x0000000000FB0000-0x0000000000FC5000-memory.dmp

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memory/4760-18-0x0000000000FB0000-0x0000000000FC5000-memory.dmp

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memory/4760-11-0x0000000000FB0000-0x0000000000FC5000-memory.dmp

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memory/4760-14-0x0000000000FB0000-0x0000000000FC5000-memory.dmp

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memory/4760-17-0x0000000000FB0000-0x0000000000FC5000-memory.dmp

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memory/5028-10-0x0000000000400000-0x000000000043E000-memory.dmp

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memory/5028-15-0x0000000000400000-0x000000000043E000-memory.dmp

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memory/5028-9-0x0000000000D00000-0x0000000000D13000-memory.dmp

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memory/5028-8-0x0000000000660000-0x0000000000760000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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