nymaim | 814f81cac3a8dd8ed03ac5a7565bdfbdedcabfa6e0ea9c9d5abce902646f9911

General

Target

file.exe
Size

1.1MB
MD5

dd998a95580da088a3168ede00053ec4
SHA1

b3c2b59cb9dc27c7a4198d3ba2df2c24ed02c368
SHA256

814f81cac3a8dd8ed03ac5a7565bdfbdedcabfa6e0ea9c9d5abce902646f9911
SHA512

60cef6d04585cea73f55bb71b8f4fde69f0ee0d02ee9abdce6fc1f9807162a8a65d2b1c373ce7fd111f6ceb423a766849078ffd8e4c02559d8a0344144e41cd5
SSDEEP

24576:R20okJPewa0gAkmTkT+IBf3nOCcBKzO/jdFE5l/a5OYCLSkl5l/Hld:R26PewNgAkmm+IBfnqKipYdl5V

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
4204	file.tmp
4164	KitFiles136.exe
344	vBgA1u6XunE.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	KitFiles136.exe

Loads dropped DLL 1 IoCs

pid	Process
4204	file.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Split Files\language\is-FS6A6.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-1TH93.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-AFJLI.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\is-UGNUR.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-USKHU.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-E2FB6.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-AK18Q.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\is-2Q43M.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-CSJSU.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-Q576J.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-IQ8N5.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-GV558.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-D400N.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\KitFiles136.exe	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-04FG4.tmp	file.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
4688	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4164	KitFiles136.exe
4164	KitFiles136.exe
4164	KitFiles136.exe
4164	KitFiles136.exe
4164	KitFiles136.exe
4164	KitFiles136.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4688	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2912 wrote to memory of 4204	2912	file.exe	82
PID 2912 wrote to memory of 4204	2912	file.exe	82
PID 2912 wrote to memory of 4204	2912	file.exe	82
PID 4204 wrote to memory of 4164	4204	file.tmp	83
PID 4204 wrote to memory of 4164	4204	file.tmp	83
PID 4204 wrote to memory of 4164	4204	file.tmp	83
PID 4164 wrote to memory of 344	4164	KitFiles136.exe	87
PID 4164 wrote to memory of 344	4164	KitFiles136.exe	87
PID 4164 wrote to memory of 344	4164	KitFiles136.exe	87
PID 4164 wrote to memory of 4824	4164	KitFiles136.exe	92
PID 4164 wrote to memory of 4824	4164	KitFiles136.exe	92
PID 4164 wrote to memory of 4824	4164	KitFiles136.exe	92
PID 4824 wrote to memory of 4688	4824	cmd.exe	94
PID 4824 wrote to memory of 4688	4824	cmd.exe	94
PID 4824 wrote to memory of 4688	4824	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2912
- C:\Users\Admin\AppData\Local\Temp\is-J5IJU.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-J5IJU.tmp\file.tmp" /SL5="$B004C,934411,51712,C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4204
- - C:\Program Files (x86)\Split Files\KitFiles136.exe
    "C:\Program Files (x86)\Split Files\KitFiles136.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4164
  - - C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\vBgA1u6XunE.exe
      4⤵
      Executes dropped EXE
      PID:344
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "KitFiles136.exe" /f & erase "C:\Program Files (x86)\Split Files\KitFiles136.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4824
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "KitFiles136.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4688

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Split Files\KitFiles136.exe

Filesize
1.7MB

MD5
55bbdea06a86342c17265525ad95c754

SHA1
31391bf08d05559c70571977c355faa4fb5f1016

SHA256
a0639c26ef33c0e97968881c87cfabbdeedc2dec77c4037d061d0f9ec9a2707d

SHA512
2314865030ef30434b0d4ca6decdabec2d852ee85fba2590faf70bf65c018fa9d5d377be3faa0b92d8f86b94bbb8e0672c06ab8bc9b4a6ecf674cf3bf4496adf

Download Submit
C:\Program Files (x86)\Split Files\KitFiles136.exe

Filesize
1.7MB

MD5
55bbdea06a86342c17265525ad95c754

SHA1
31391bf08d05559c70571977c355faa4fb5f1016

SHA256
a0639c26ef33c0e97968881c87cfabbdeedc2dec77c4037d061d0f9ec9a2707d

SHA512
2314865030ef30434b0d4ca6decdabec2d852ee85fba2590faf70bf65c018fa9d5d377be3faa0b92d8f86b94bbb8e0672c06ab8bc9b4a6ecf674cf3bf4496adf

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-J5IJU.tmp\file.tmp

Filesize
692KB

MD5
011df348d33aeb3103be711e7aaad000

SHA1
eff06d4777d24ab7c2384737b846b7df7c9dd5ae

SHA256
4f50389dd834b3268fcc673f791d82a61142eeb7baaa54a03668516df18507ef

SHA512
e4b76ac1058880a8ba633f0ff37657594a92231cc6093b80dc6c3617d3edd045f1a3592c2b04cf5acbdbb599d2e4b9e079a47e92692912f4f0d7d189dd14b375

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-J5IJU.tmp\file.tmp

Filesize
692KB

MD5
011df348d33aeb3103be711e7aaad000

SHA1
eff06d4777d24ab7c2384737b846b7df7c9dd5ae

SHA256
4f50389dd834b3268fcc673f791d82a61142eeb7baaa54a03668516df18507ef

SHA512
e4b76ac1058880a8ba633f0ff37657594a92231cc6093b80dc6c3617d3edd045f1a3592c2b04cf5acbdbb599d2e4b9e079a47e92692912f4f0d7d189dd14b375

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-RLB64.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\vBgA1u6XunE.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\vBgA1u6XunE.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/2912-134-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2912-157-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2912-152-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2912-132-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4164-143-0x0000000000400000-0x00000000013B0000-memory.dmp

Filesize
15.7MB

Download
memory/4164-144-0x0000000000400000-0x00000000013B0000-memory.dmp

Filesize
15.7MB

Download
memory/4164-142-0x0000000000400000-0x00000000013B0000-memory.dmp

Filesize
15.7MB

Download
memory/4164-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4164-153-0x0000000000400000-0x00000000013B0000-memory.dmp

Filesize
15.7MB

Download
memory/4164-156-0x0000000000400000-0x00000000013B0000-memory.dmp

Filesize
15.7MB

Download

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