nymaim | 7875a44f2882e5189ee7a3196bca5384fa63f7a5d157432dcc0e289df76e50f6

General

Target

file.exe
Size

233KB
MD5

66434467c3e517ff2b658695389ad049
SHA1

f057b1e4617eaccb9b10c41f1c5684f577df2a77
SHA256

7875a44f2882e5189ee7a3196bca5384fa63f7a5d157432dcc0e289df76e50f6
SHA512

58728baf12ee29af0a666bff19a2750e7153b641ace00681c133f61bc7af959cac5e84d227f7f9ecd18c1a04843cb2fbe88965fe4977fb8f0cc613bd8f4c3055
SSDEEP

3072:7IAUyweDLPRt0dxETp67eptLMuf4P27lhHnAdnwOx1Tm2whPTm1w/a8K+YdAFd:+eD3dCIQV2BhHnAdwOxohPow/CAFd

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
620	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
2044	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1604	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
1664	620	WerFault.exe	31

Kills process with taskkill 1 IoCs

evasion

pid	Process
1140	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
740	file.exe
740	file.exe
740	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	620	Cleaner.exe
Token: SeDebugPrivilege	1140	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 740 wrote to memory of 1604	740	file.exe	29
PID 740 wrote to memory of 1604	740	file.exe	29
PID 740 wrote to memory of 1604	740	file.exe	29
PID 740 wrote to memory of 1604	740	file.exe	29
PID 1604 wrote to memory of 620	1604	cmd.exe	31
PID 1604 wrote to memory of 620	1604	cmd.exe	31
PID 1604 wrote to memory of 620	1604	cmd.exe	31
PID 1604 wrote to memory of 620	1604	cmd.exe	31
PID 620 wrote to memory of 1664	620	Cleaner.exe	33
PID 620 wrote to memory of 1664	620	Cleaner.exe	33
PID 620 wrote to memory of 1664	620	Cleaner.exe	33
PID 740 wrote to memory of 2044	740	file.exe	34
PID 740 wrote to memory of 2044	740	file.exe	34
PID 740 wrote to memory of 2044	740	file.exe	34
PID 740 wrote to memory of 2044	740	file.exe	34
PID 2044 wrote to memory of 1140	2044	cmd.exe	36
PID 2044 wrote to memory of 1140	2044	cmd.exe	36
PID 2044 wrote to memory of 1140	2044	cmd.exe	36
PID 2044 wrote to memory of 1140	2044	cmd.exe	36

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:740
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\fBOp9sDLUasmnYPr9qiq7q6I\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1604
- - C:\Users\Admin\AppData\Local\Temp\fBOp9sDLUasmnYPr9qiq7q6I\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\fBOp9sDLUasmnYPr9qiq7q6I\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:620
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 620 -s 1152
      4⤵
      Program crash
      PID:1664
- 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:2044
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1140

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\fBOp9sDLUasmnYPr9qiq7q6I\Bunifu_UI_v1.5.3.dll

Filesize
236KB

MD5
2ecb51ab00c5f340380ecf849291dbcf

SHA1
1a4dffbce2a4ce65495ed79eab42a4da3b660931

SHA256
f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf

SHA512
e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\fBOp9sDLUasmnYPr9qiq7q6I\Cleaner.exe

Filesize
4.0MB

MD5
a1a19faf0af29841daeeaad999d899bd

SHA1
f67b9afdab167d5bcc544358b0e7fd2858784508

SHA256
f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7

SHA512
a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8

Download Submit
C:\Users\Admin\AppData\Local\Temp\fBOp9sDLUasmnYPr9qiq7q6I\Cleaner.exe

Filesize
4.0MB

MD5
a1a19faf0af29841daeeaad999d899bd

SHA1
f67b9afdab167d5bcc544358b0e7fd2858784508

SHA256
f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7

SHA512
a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8

Download Submit
\Users\Admin\AppData\Local\Temp\fBOp9sDLUasmnYPr9qiq7q6I\Cleaner.exe

Filesize
4.0MB

MD5
a1a19faf0af29841daeeaad999d899bd

SHA1
f67b9afdab167d5bcc544358b0e7fd2858784508

SHA256
f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7

SHA512
a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8

Download Submit
memory/620-64-0x000007FEFB9B1000-0x000007FEFB9B3000-memory.dmp

Filesize
8KB

Download
memory/620-66-0x0000000000500000-0x0000000000542000-memory.dmp

Filesize
264KB

Download
memory/620-63-0x0000000001030000-0x0000000001188000-memory.dmp

Filesize
1.3MB

Download
memory/740-56-0x0000000000220000-0x000000000025F000-memory.dmp

Filesize
252KB

Download
memory/740-57-0x0000000000400000-0x0000000000597000-memory.dmp

Filesize
1.6MB

Download
memory/740-54-0x0000000075A81000-0x0000000075A83000-memory.dmp

Filesize
8KB

Download
memory/740-55-0x00000000006BD000-0x00000000006E4000-memory.dmp

Filesize
156KB

Download
memory/740-67-0x00000000006BD000-0x00000000006E4000-memory.dmp

Filesize
156KB

Download
memory/740-68-0x0000000000400000-0x0000000000597000-memory.dmp

Filesize
1.6MB

Download
memory/740-70-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/740-75-0x0000000000400000-0x0000000000597000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing