nymaim | 053876ce93eb32b9a63d46a6f71533c59c2ad8fefe30ff7c6d92f62ee12cabe6

General

Target

file.exe
Size

2.5MB
MD5

7dc58f88b0d1c37aae28fa0854f5796a
SHA1

69e495449b3beb185517c8b4fef3aea5d3a4f40c
SHA256

053876ce93eb32b9a63d46a6f71533c59c2ad8fefe30ff7c6d92f62ee12cabe6
SHA512

e1e20e0b8794df6f9e65267ea17c651d8d74285757ea8a574216b3045e3c15f873e51ad9caa1336354abbd6f147fcfb731b4b5a12a7e736b5a61d66bf7155f01
SSDEEP

49152:N0PBlob+781YdnmFoA41sy8Kar3DHGoDD93bHxIZoTYLaTAM77Vf7O/d3HV:N0PBbDna3ZzDHGc3bHx1cQ1Q1

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
2136	is-RA57I.tmp
3140	ocFolders.exe
2036	B0Ye65fOPxcYmm.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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	ocFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
2136	is-RA57I.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 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-RA57I.tmp
File created	C:\Program Files (x86)\PrintFolders\is-PF0I3.tmp	is-RA57I.tmp
File created	C:\Program Files (x86)\PrintFolders\is-9AIVU.tmp	is-RA57I.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-RA57I.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\ocFolders.exe	is-RA57I.tmp
File created	C:\Program Files (x86)\PrintFolders\is-F843B.tmp	is-RA57I.tmp
File created	C:\Program Files (x86)\PrintFolders\is-L4ABN.tmp	is-RA57I.tmp
File created	C:\Program Files (x86)\PrintFolders\is-NR59O.tmp	is-RA57I.tmp
File created	C:\Program Files (x86)\PrintFolders\is-JQU54.tmp	is-RA57I.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
4712	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3140	ocFolders.exe
3140	ocFolders.exe
3140	ocFolders.exe
3140	ocFolders.exe
3140	ocFolders.exe
3140	ocFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4712	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4640 wrote to memory of 2136	4640	file.exe	81
PID 4640 wrote to memory of 2136	4640	file.exe	81
PID 4640 wrote to memory of 2136	4640	file.exe	81
PID 2136 wrote to memory of 3140	2136	is-RA57I.tmp	82
PID 2136 wrote to memory of 3140	2136	is-RA57I.tmp	82
PID 2136 wrote to memory of 3140	2136	is-RA57I.tmp	82
PID 3140 wrote to memory of 2036	3140	ocFolders.exe	85
PID 3140 wrote to memory of 2036	3140	ocFolders.exe	85
PID 3140 wrote to memory of 2036	3140	ocFolders.exe	85
PID 3140 wrote to memory of 2724	3140	ocFolders.exe	95
PID 3140 wrote to memory of 2724	3140	ocFolders.exe	95
PID 3140 wrote to memory of 2724	3140	ocFolders.exe	95
PID 2724 wrote to memory of 4712	2724	cmd.exe	97
PID 2724 wrote to memory of 4712	2724	cmd.exe	97
PID 2724 wrote to memory of 4712	2724	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4640
- C:\Users\Admin\AppData\Local\Temp\is-776F6.tmp\is-RA57I.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-776F6.tmp\is-RA57I.tmp" /SL4 $A0040 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2320436 169984
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2136
- - C:\Program Files (x86)\PrintFolders\ocFolders.exe
    "C:\Program Files (x86)\PrintFolders\ocFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:3140
  - - C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\B0Ye65fOPxcYmm.exe
      4⤵
      Executes dropped EXE
      PID:2036
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "ocFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\ocFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2724
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "ocFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4712

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)\PrintFolders\ocFolders.exe

Filesize
3.7MB

MD5
6a37c7f7735e014c1b21bcce468e9221

SHA1
244e4a4cd2766696bdf6cc2b5be901252ecb7178

SHA256
4de995f0e3e79b89648c0c4861ebf97f3e097912e2b3d84fafba124cc4a56205

SHA512
ce1e6d8b7d4fd5d0cd38570e3dbc9822cc12739556fb229b0e1c24b60e0c411038ec8d0ea35066b8c6c2edda79005f26155a68c0baf1045bc96724e41e2ce940

Download Submit
C:\Program Files (x86)\PrintFolders\ocFolders.exe

Filesize
3.7MB

MD5
6a37c7f7735e014c1b21bcce468e9221

SHA1
244e4a4cd2766696bdf6cc2b5be901252ecb7178

SHA256
4de995f0e3e79b89648c0c4861ebf97f3e097912e2b3d84fafba124cc4a56205

SHA512
ce1e6d8b7d4fd5d0cd38570e3dbc9822cc12739556fb229b0e1c24b60e0c411038ec8d0ea35066b8c6c2edda79005f26155a68c0baf1045bc96724e41e2ce940

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-776F6.tmp\is-RA57I.tmp

Filesize
759KB

MD5
d35c838e416f6a317c90117cc834b92b

SHA1
289a030cc78131163a8d6bc3c5dd831ac0f962a1

SHA256
2d4703dac05e8e6d136a8173f84d2618b54b6e7ef44ae5557350614bbb5a9797

SHA512
9a50f934c199b4415911cae873cebd46f682526290b41a42a882a580fed67c99f5248abfbaa367f20b471564b4cf6d62f28ed2c945206267b37788f94377f167

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-776F6.tmp\is-RA57I.tmp

Filesize
759KB

MD5
d35c838e416f6a317c90117cc834b92b

SHA1
289a030cc78131163a8d6bc3c5dd831ac0f962a1

SHA256
2d4703dac05e8e6d136a8173f84d2618b54b6e7ef44ae5557350614bbb5a9797

SHA512
9a50f934c199b4415911cae873cebd46f682526290b41a42a882a580fed67c99f5248abfbaa367f20b471564b4cf6d62f28ed2c945206267b37788f94377f167

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-7N17J.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\B0Ye65fOPxcYmm.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\B0Ye65fOPxcYmm.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/3140-143-0x0000000000400000-0x00000000015BF000-memory.dmp

Filesize
17.7MB

Download
memory/3140-142-0x0000000000400000-0x00000000015BF000-memory.dmp

Filesize
17.7MB

Download
memory/3140-147-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/3140-151-0x0000000000400000-0x00000000015BF000-memory.dmp

Filesize
17.7MB

Download
memory/3140-154-0x0000000000400000-0x00000000015BF000-memory.dmp

Filesize
17.7MB

Download
memory/4640-132-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4640-137-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4640-155-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download

Analysis

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