nymaim | d059c6fb16a2e751c9c9afdc4c553a32a3bb841c2b026ddd6aab08f5b1078e79

Analysis

max time kernel
117s
max time network
121s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
01/10/2022, 17:22

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General

Target
file.exe
Size 234KB
Sample221001-vxll2shdgn
SHA256 d059c6fb16a2e751c9c9afdc4c553a32a3bb841c2b026ddd6aab08f5b1078e79
MD5 f0c9eddb96619d682eeb982d6c00a95b
SHA1 54f1bd3791f70772e8380a870ac966874ef7f571
SHA512 969348333d005e1212e94b32fbc264f326afea18ed98fc1b3d0de7eef2db7f780da4898b1d6f06fd0f5ad345e5bb3aefb9197341dcca240a2c04156a04cb3a85
SSDEEP 6144:oaQQiTRsVjS/zFUA++pKON3nV5wAPSlWSOB:oaQrTRsVjS/ziAZpvV5LqAF
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

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
1128	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
1928	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1492	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
1520	1128	WerFault.exe	31

Kills process with taskkill 1 IoCs

evasion

pid	Process
2000	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1380	file.exe
1380	file.exe
1380	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1128	Cleaner.exe
Token: SeDebugPrivilege	2000	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1380 wrote to memory of 1492	1380	file.exe	29
PID 1380 wrote to memory of 1492	1380	file.exe	29
PID 1380 wrote to memory of 1492	1380	file.exe	29
PID 1380 wrote to memory of 1492	1380	file.exe	29
PID 1492 wrote to memory of 1128	1492	cmd.exe	31
PID 1492 wrote to memory of 1128	1492	cmd.exe	31
PID 1492 wrote to memory of 1128	1492	cmd.exe	31
PID 1492 wrote to memory of 1128	1492	cmd.exe	31
PID 1128 wrote to memory of 1520	1128	Cleaner.exe	33
PID 1128 wrote to memory of 1520	1128	Cleaner.exe	33
PID 1128 wrote to memory of 1520	1128	Cleaner.exe	33
PID 1380 wrote to memory of 1928	1380	file.exe	34
PID 1380 wrote to memory of 1928	1380	file.exe	34
PID 1380 wrote to memory of 1928	1380	file.exe	34
PID 1380 wrote to memory of 1928	1380	file.exe	34
PID 1928 wrote to memory of 2000	1928	cmd.exe	36
PID 1928 wrote to memory of 2000	1928	cmd.exe	36
PID 1928 wrote to memory of 2000	1928	cmd.exe	36
PID 1928 wrote to memory of 2000	1928	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:1380
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\LXl1Xcs5bjfs8\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1492
- - C:\Users\Admin\AppData\Local\Temp\LXl1Xcs5bjfs8\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\LXl1Xcs5bjfs8\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1128
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1128 -s 1152
      4⤵
      Program crash
      PID:1520
- 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:1928
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2000

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\LXl1Xcs5bjfs8\Bunifu_UI_v1.5.3.dll
Size 236KB
SHA256 f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf
MD5 2ecb51ab00c5f340380ecf849291dbcf
SHA1 1a4dffbce2a4ce65495ed79eab42a4da3b660931
SHA512 e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b
SSDEEP 6144:SIQpxILDXGGMO7Ice9C5kQw2hWHcHTykhb:SIQpxILDXGGlET9n/cHG
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\LXl1Xcs5bjfs8\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\LXl1Xcs5bjfs8\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path \Users\Admin\AppData\Local\Temp\LXl1Xcs5bjfs8\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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memory/1128-63-0x0000000000E70000-0x0000000000FC8000-memory.dmp

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memory/1128-67-0x0000000000AF0000-0x0000000000B32000-memory.dmp

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memory/1128-65-0x000007FEFB631000-0x000007FEFB633000-memory.dmp

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memory/1380-54-0x0000000075A11000-0x0000000075A13000-memory.dmp

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memory/1380-64-0x0000000000400000-0x0000000000597000-memory.dmp

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memory/1380-56-0x00000000002C0000-0x00000000002FF000-memory.dmp

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memory/1380-55-0x000000000064D000-0x0000000000673000-memory.dmp

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memory/1380-57-0x0000000000400000-0x0000000000597000-memory.dmp

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memory/1380-69-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1380-74-0x0000000000400000-0x0000000000597000-memory.dmp

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