nymaim | e8bf7755879b56fa7facf7d04e3121ed31be9993e375e702bfd277df6ed16c44

General

Target

file.exe
Size

359KB
MD5

307d835b5bc1b21bffb38a0105c527f3
SHA1

5e18c5195a9c370f3a4853e889b1bd231a16c284
SHA256

e8bf7755879b56fa7facf7d04e3121ed31be9993e375e702bfd277df6ed16c44
SHA512

3bf45813b076208a1da32e15a523316c0998b9b498ffff2b4d1cbe8525cd039403acf744249fc54dbd04f33f760e383cb38fbe678768b6c1fe52287d01661109
SSDEEP

6144:6JzucH6AwlzmzLrVlBfF/2oblxxRK8WRyPpiga3wVfg:6tsAwl6rRfF/XxRhDPMp

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
1412	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
2028	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1692	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
1192	1412	WerFault.exe	31

Kills process with taskkill 1 IoCs

evasion

pid	Process
512	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1572	file.exe
1572	file.exe
1572	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1572	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1412	Cleaner.exe
Token: SeDebugPrivilege	512	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1572 wrote to memory of 1692	1572	file.exe	29
PID 1572 wrote to memory of 1692	1572	file.exe	29
PID 1572 wrote to memory of 1692	1572	file.exe	29
PID 1572 wrote to memory of 1692	1572	file.exe	29
PID 1692 wrote to memory of 1412	1692	cmd.exe	31
PID 1692 wrote to memory of 1412	1692	cmd.exe	31
PID 1692 wrote to memory of 1412	1692	cmd.exe	31
PID 1692 wrote to memory of 1412	1692	cmd.exe	31
PID 1412 wrote to memory of 1192	1412	Cleaner.exe	33
PID 1412 wrote to memory of 1192	1412	Cleaner.exe	33
PID 1412 wrote to memory of 1192	1412	Cleaner.exe	33
PID 1572 wrote to memory of 2028	1572	file.exe	34
PID 1572 wrote to memory of 2028	1572	file.exe	34
PID 1572 wrote to memory of 2028	1572	file.exe	34
PID 1572 wrote to memory of 2028	1572	file.exe	34
PID 2028 wrote to memory of 512	2028	cmd.exe	36
PID 2028 wrote to memory of 512	2028	cmd.exe	36
PID 2028 wrote to memory of 512	2028	cmd.exe	36
PID 2028 wrote to memory of 512	2028	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1572
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\BScACfMOR1VBJNSsQMuO\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1692
- - C:\Users\Admin\AppData\Local\Temp\BScACfMOR1VBJNSsQMuO\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\BScACfMOR1VBJNSsQMuO\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1412
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1412 -s 1144
      4⤵
      Program crash
      PID:1192
- 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:2028
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:512

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\BScACfMOR1VBJNSsQMuO\Bunifu_UI_v1.5.3.dll

Filesize
236KB

MD5
2ecb51ab00c5f340380ecf849291dbcf

SHA1
1a4dffbce2a4ce65495ed79eab42a4da3b660931

SHA256
f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf

SHA512
e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\BScACfMOR1VBJNSsQMuO\Cleaner.exe

Filesize
4.0MB

MD5
a1a19faf0af29841daeeaad999d899bd

SHA1
f67b9afdab167d5bcc544358b0e7fd2858784508

SHA256
f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7

SHA512
a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8

Download Submit
C:\Users\Admin\AppData\Local\Temp\BScACfMOR1VBJNSsQMuO\Cleaner.exe

Filesize
4.0MB

MD5
a1a19faf0af29841daeeaad999d899bd

SHA1
f67b9afdab167d5bcc544358b0e7fd2858784508

SHA256
f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7

SHA512
a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8

Download Submit
\Users\Admin\AppData\Local\Temp\BScACfMOR1VBJNSsQMuO\Cleaner.exe

Filesize
4.0MB

MD5
a1a19faf0af29841daeeaad999d899bd

SHA1
f67b9afdab167d5bcc544358b0e7fd2858784508

SHA256
f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7

SHA512
a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8

Download Submit
memory/1412-69-0x0000000000540000-0x0000000000582000-memory.dmp

Filesize
264KB

Download
memory/1412-66-0x0000000001330000-0x0000000001488000-memory.dmp

Filesize
1.3MB

Download
memory/1412-67-0x000007FEFBD81000-0x000007FEFBD83000-memory.dmp

Filesize
8KB

Download
memory/1572-59-0x00000000002C8000-0x00000000002EF000-memory.dmp

Filesize
156KB

Download
memory/1572-56-0x00000000002C8000-0x00000000002EF000-memory.dmp

Filesize
156KB

Download
memory/1572-60-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1572-58-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1572-54-0x00000000002C8000-0x00000000002EF000-memory.dmp

Filesize
156KB

Download
memory/1572-57-0x00000000001B0000-0x00000000001EF000-memory.dmp

Filesize
252KB

Download
memory/1572-71-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1572-76-0x00000000002C8000-0x00000000002EF000-memory.dmp

Filesize
156KB

Download
memory/1572-77-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1572-55-0x0000000076121000-0x0000000076123000-memory.dmp

Filesize
8KB

Download

Analysis

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