nymaim | 8e20aa3f6c6659be8b5bb84028d4481f57df81488aaa4a56f333ffee3e13bef3

General

Target

file.exe
Size

371KB
MD5

d0053c55d6cd2aa8c70aae3bd5f95032
SHA1

b411c19fd2242e49ef16c48598cb7a6887932ad6
SHA256

8e20aa3f6c6659be8b5bb84028d4481f57df81488aaa4a56f333ffee3e13bef3
SHA512

1ad7a431e70633e985feb5d30c99265bc6eb3d736ffe886330ceb6c50feb7dbe2d18d2b2cb43f5db816b4ec44266707b7575bafc2680e8f041df05456ff0e4c7
SSDEEP

6144:Wnz7Hxcm9IKtPwvqv91DF1CinzFJuzbgwuO0Ma8wVfg3L:WvHxc1KtP/vx1CinzunnwM/3

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

C2

208.67.104.97

85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1800	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1200	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1652	cmd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1684	1800	WerFault.exe	32

Kills process with taskkill 1 IoCs

evasion

pid	Process
1384	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1700	file.exe
1700	file.exe
1700	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1800	Cleaner.exe
Token: SeDebugPrivilege	1384	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1700 wrote to memory of 1652	1700	file.exe	30
PID 1700 wrote to memory of 1652	1700	file.exe	30
PID 1700 wrote to memory of 1652	1700	file.exe	30
PID 1700 wrote to memory of 1652	1700	file.exe	30
PID 1652 wrote to memory of 1800	1652	cmd.exe	32
PID 1652 wrote to memory of 1800	1652	cmd.exe	32
PID 1652 wrote to memory of 1800	1652	cmd.exe	32
PID 1652 wrote to memory of 1800	1652	cmd.exe	32
PID 1800 wrote to memory of 1684	1800	Cleaner.exe	34
PID 1800 wrote to memory of 1684	1800	Cleaner.exe	34
PID 1800 wrote to memory of 1684	1800	Cleaner.exe	34
PID 1700 wrote to memory of 1200	1700	file.exe	35
PID 1700 wrote to memory of 1200	1700	file.exe	35
PID 1700 wrote to memory of 1200	1700	file.exe	35
PID 1700 wrote to memory of 1200	1700	file.exe	35
PID 1200 wrote to memory of 1384	1200	cmd.exe	37
PID 1200 wrote to memory of 1384	1200	cmd.exe	37
PID 1200 wrote to memory of 1384	1200	cmd.exe	37
PID 1200 wrote to memory of 1384	1200	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1700
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\g8x4PQJbSlQu7\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1652
- - C:\Users\Admin\AppData\Local\Temp\g8x4PQJbSlQu7\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\g8x4PQJbSlQu7\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1800
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1800 -s 1152
      4⤵
      Program crash
      PID:1684
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1200
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1384

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

1

T1102

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\g8x4PQJbSlQu7\Bunifu_UI_v1.5.3.dll

Filesize
236KB

MD5
2ecb51ab00c5f340380ecf849291dbcf

SHA1
1a4dffbce2a4ce65495ed79eab42a4da3b660931

SHA256
f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf

SHA512
e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\g8x4PQJbSlQu7\Cleaner.exe

Filesize
4.0MB

MD5
a1a19faf0af29841daeeaad999d899bd

SHA1
f67b9afdab167d5bcc544358b0e7fd2858784508

SHA256
f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7

SHA512
a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8

Download Submit
C:\Users\Admin\AppData\Local\Temp\g8x4PQJbSlQu7\Cleaner.exe

Filesize
4.0MB

MD5
a1a19faf0af29841daeeaad999d899bd

SHA1
f67b9afdab167d5bcc544358b0e7fd2858784508

SHA256
f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7

SHA512
a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8

Download Submit
\Users\Admin\AppData\Local\Temp\g8x4PQJbSlQu7\Cleaner.exe

Filesize
4.0MB

MD5
a1a19faf0af29841daeeaad999d899bd

SHA1
f67b9afdab167d5bcc544358b0e7fd2858784508

SHA256
f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7

SHA512
a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8

Download Submit
memory/1700-57-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/1700-67-0x000000000055E000-0x0000000000584000-memory.dmp

Filesize
152KB

Download
memory/1700-68-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/1700-54-0x0000000076BA1000-0x0000000076BA3000-memory.dmp

Filesize
8KB

Download
memory/1700-70-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1700-56-0x0000000000220000-0x000000000025F000-memory.dmp

Filesize
252KB

Download
memory/1700-75-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/1700-55-0x000000000055E000-0x0000000000584000-memory.dmp

Filesize
152KB

Download
memory/1800-63-0x0000000000D20000-0x0000000000E78000-memory.dmp

Filesize
1.3MB

Download
memory/1800-64-0x000007FEFC611000-0x000007FEFC613000-memory.dmp

Filesize
8KB

Download
memory/1800-66-0x00000000005A0000-0x00000000005E2000-memory.dmp

Filesize
264KB

Download

Analysis

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