tofsee | 29aecf60d2b78688a409dd254eba6414e13fded9ebca1ac8beb624e252ae2f0c

Resubmissions

17/06/2022, 07:59

220617-jvvamabael10

29/05/2022, 16:27

220529-tx3pwsffh210

Analysis

max time kernel
151s
max time network
158s
platform
windows7_x64
resource
win7-20220414-en
submitted
29/05/2022, 16:27

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General

Target
015e6a91fc2397216cdf2e0c0e7e4132.exe
Size 198KB
Sample220529-tx3pwsffh2
SHA256 29aecf60d2b78688a409dd254eba6414e13fded9ebca1ac8beb624e252ae2f0c
MD5 015e6a91fc2397216cdf2e0c0e7e4132
SHA1 5f3a2877d37c6b0f392e42ac646af7afa0e45bcf
SHA512 d89c0bfc28f2ba1e697cf25e73c3196b8300be3f6b01355136fac523160671df1e84935f0b80d16db015b864a3d9d0aca2a13bf55071581a73202437d557e000
MD5 SHA1 SHA512

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

svartalfheim.top
jotunheim.name
��Op��;L��jy��d-��Mݤm4�čT��t=͔]$��}D ԝd-��Mݤm4�čT_�t=��)Q��-`��@��Mݤm4�čT��t=͔]$��}D ԝd-��Mݤm4�čT��t=v�]$�
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Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Windows security bypass 2 TTPs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112
Creates new service(s) 1 TTPs
persistence

New Service
T1050

Executes dropped EXE 1 IoCs

pid	Process
1680	qgmpwdxk.exe

Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031
Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

Deletes itself 1 IoCs

pid	Process
1352	svchost.exe

Drops file in System32 directory 1 IoCs

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1680 set thread context of 1352	1680	qgmpwdxk.exe	40

Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies data under HKEY_USERS 2 IoCs

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

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1140 wrote to memory of 1128	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	27
PID 1140 wrote to memory of 1128	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	27
PID 1140 wrote to memory of 1128	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	27
PID 1140 wrote to memory of 1128	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	27
PID 1140 wrote to memory of 1712	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	29
PID 1140 wrote to memory of 1712	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	29
PID 1140 wrote to memory of 1712	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	29
PID 1140 wrote to memory of 1712	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	29
PID 1140 wrote to memory of 1716	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	31
PID 1140 wrote to memory of 1716	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	31
PID 1140 wrote to memory of 1716	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	31
PID 1140 wrote to memory of 1716	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	31
PID 1140 wrote to memory of 2036	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	33
PID 1140 wrote to memory of 2036	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	33
PID 1140 wrote to memory of 2036	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	33
PID 1140 wrote to memory of 2036	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	33
PID 1140 wrote to memory of 320	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	35
PID 1140 wrote to memory of 320	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	35
PID 1140 wrote to memory of 320	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	35
PID 1140 wrote to memory of 320	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	35
PID 1140 wrote to memory of 1436	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	38
PID 1140 wrote to memory of 1436	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	38
PID 1140 wrote to memory of 1436	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	38
PID 1140 wrote to memory of 1436	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	38
PID 1680 wrote to memory of 1352	1680	qgmpwdxk.exe	40
PID 1680 wrote to memory of 1352	1680	qgmpwdxk.exe	40
PID 1680 wrote to memory of 1352	1680	qgmpwdxk.exe	40
PID 1680 wrote to memory of 1352	1680	qgmpwdxk.exe	40
PID 1680 wrote to memory of 1352	1680	qgmpwdxk.exe	40
PID 1680 wrote to memory of 1352	1680	qgmpwdxk.exe	40

C:\Users\Admin\AppData\Local\Temp\015e6a91fc2397216cdf2e0c0e7e4132.exe
"C:\Users\Admin\AppData\Local\Temp\015e6a91fc2397216cdf2e0c0e7e4132.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1140
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nambzfbl\
  2⤵
  PID:1128
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qgmpwdxk.exe" C:\Windows\SysWOW64\nambzfbl\
  2⤵
  PID:1712
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create nambzfbl binPath= "C:\Windows\SysWOW64\nambzfbl\qgmpwdxk.exe /d\"C:\Users\Admin\AppData\Local\Temp\015e6a91fc2397216cdf2e0c0e7e4132.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  PID:1716
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description nambzfbl "wifi internet conection"
  2⤵
  PID:2036
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start nambzfbl
  2⤵
  PID:320
- 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⤵
  PID:1436

C:\Windows\SysWOW64\nambzfbl\qgmpwdxk.exe
C:\Windows\SysWOW64\nambzfbl\qgmpwdxk.exe /d"C:\Users\Admin\AppData\Local\Temp\015e6a91fc2397216cdf2e0c0e7e4132.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1680
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Deletes itself
  - Drops file in System32 directory
  - Modifies data under HKEY_USERS
  PID:1352

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

New Service

T1050

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

New Service

T1050

Defense Evasion

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

qgmpwdxk.exe

Path C:\Users\Admin\AppData\Local\Temp\qgmpwdxk.exe
Size 12.7MB
SHA256 b1c9ef0e0353582acfd7d7cb9ef6b316f377b86f95c019315ee5d854d4447187
MD5 ff8cca8022c3200e86c89890b5b6b294
SHA1 04fab2ef4e84e359fa4ad896a19768933f5ac46b
SHA512 29a9bb7b825339677d42109d5a5d0680eb79423273e88d4ac200c91dd80e4f686fbedfebbd04facf923bf83f25255a4e6e59b60756ff8e6c76a7d422a7920c4b
SSDEEP 98304:JQbEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE:m
MD5 SHA1 SHA512 SSDEEP

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qgmpwdxk.exe

Path C:\Windows\SysWOW64\nambzfbl\qgmpwdxk.exe
Size 12.7MB
SHA256 b1c9ef0e0353582acfd7d7cb9ef6b316f377b86f95c019315ee5d854d4447187
MD5 ff8cca8022c3200e86c89890b5b6b294
SHA1 04fab2ef4e84e359fa4ad896a19768933f5ac46b
SHA512 29a9bb7b825339677d42109d5a5d0680eb79423273e88d4ac200c91dd80e4f686fbedfebbd04facf923bf83f25255a4e6e59b60756ff8e6c76a7d422a7920c4b
SSDEEP 98304:JQbEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE:m
MD5 SHA1 SHA512 SSDEEP

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memory/1140-66-0x0000000000D7E000-0x0000000000D8C000-memory.dmp

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memory/1140-58-0x0000000000220000-0x0000000000233000-memory.dmp

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memory/1140-60-0x0000000000400000-0x00000000008FA000-memory.dmp

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memory/1140-56-0x0000000000D7E000-0x0000000000D8C000-memory.dmp

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memory/1140-67-0x0000000000400000-0x00000000008FA000-memory.dmp

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memory/1140-54-0x00000000762C1000-0x00000000762C3000-memory.dmp

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memory/1352-70-0x00000000000C0000-0x00000000000D5000-memory.dmp

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memory/1352-83-0x00000000000E0000-0x00000000000E6000-memory.dmp

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memory/1352-86-0x00000000001C0000-0x00000000001D0000-memory.dmp

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memory/1352-79-0x00000000000C0000-0x00000000000D5000-memory.dmp

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memory/1352-72-0x00000000000C0000-0x00000000000D5000-memory.dmp

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memory/1352-88-0x00000000000C0000-0x00000000000D5000-memory.dmp

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memory/1352-80-0x0000000001780000-0x000000000198F000-memory.dmp

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memory/1680-74-0x0000000000ABE000-0x0000000000ACB000-memory.dmp

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memory/1680-78-0x0000000000400000-0x00000000008FA000-memory.dmp

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Resubmissions

Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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