nymaim | 263c5738439701a46ca16da8818c3f13dc44d65c96b60192fc22c0fd6cace180

Analysis

max time kernel
90s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
19/12/2022, 23:47

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General

Target
file.exe
Size 2.3MB
Sample221219-3svcdsbe3t
SHA256 263c5738439701a46ca16da8818c3f13dc44d65c96b60192fc22c0fd6cace180
MD5 6e3af020ef17464ab8b2e02b9b38206e
SHA1 2647aca29dee8c13aa181bf24163d704891da0ae
SHA512 6da3eeb2368ff4e009bba9a44c1b3b6eefb8a4c7fbc2da8b81dc7b00be57e48486d4372d96cd633b24b5cb459d723115e1b365d09cb1c36240ac93ca5f214c7c
SSDEEP 49152:b1JQTc87jKwMIOmc7ORix8TtEqHOt43UZ/HVkmp9AfqvycA:bkTc+TMlmACt1HOJZfVkOvyN
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

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
4244	is-2AFQJ.tmp
3356	odFolders.exe
5020	6DeIXxGSEG2RVC.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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	odFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4244	is-2AFQJ.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\is-T0OVL.tmp	is-2AFQJ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-V3TS5.tmp	is-2AFQJ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-5MM5F.tmp	is-2AFQJ.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-2AFQJ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KU1IE.tmp	is-2AFQJ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-PLB9M.tmp	is-2AFQJ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-3LCFL.tmp	is-2AFQJ.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-2AFQJ.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\odFolders.exe	is-2AFQJ.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
3756	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3356	odFolders.exe
3356	odFolders.exe
3356	odFolders.exe
3356	odFolders.exe
3356	odFolders.exe
3356	odFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3756	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2416 wrote to memory of 4244	2416	file.exe	80
PID 2416 wrote to memory of 4244	2416	file.exe	80
PID 2416 wrote to memory of 4244	2416	file.exe	80
PID 4244 wrote to memory of 3356	4244	is-2AFQJ.tmp	81
PID 4244 wrote to memory of 3356	4244	is-2AFQJ.tmp	81
PID 4244 wrote to memory of 3356	4244	is-2AFQJ.tmp	81
PID 3356 wrote to memory of 5020	3356	odFolders.exe	82
PID 3356 wrote to memory of 5020	3356	odFolders.exe	82
PID 3356 wrote to memory of 5020	3356	odFolders.exe	82
PID 3356 wrote to memory of 1036	3356	odFolders.exe	90
PID 3356 wrote to memory of 1036	3356	odFolders.exe	90
PID 3356 wrote to memory of 1036	3356	odFolders.exe	90
PID 1036 wrote to memory of 3756	1036	cmd.exe	92
PID 1036 wrote to memory of 3756	1036	cmd.exe	92
PID 1036 wrote to memory of 3756	1036	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2416
- C:\Users\Admin\AppData\Local\Temp\is-U1HFU.tmp\is-2AFQJ.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-U1HFU.tmp\is-2AFQJ.tmp" /SL4 $601D0 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2153439 161280
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4244
- - C:\Program Files (x86)\PrintFolders\odFolders.exe
    "C:\Program Files (x86)\PrintFolders\odFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:3356
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\6DeIXxGSEG2RVC.exe
      4⤵
      Executes dropped EXE
      PID:5020
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "odFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\odFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1036
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "odFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3756

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

odFolders.exe

Path C:\Program Files (x86)\PrintFolders\odFolders.exe
Size 3.6MB
SHA256 f259ff641813a326bb76c2663d474b23e42f8ec37834c522dd9c1b95980466cc
MD5 dab62389d9a15d7e76f20a424a722fff
SHA1 4c30df27062ca9343bf55e58b9e7aefbfd9ff7be
SHA512 e8f45810056f03bc51e4bd2857afe2e8d09290e3b120d781ff76f65c4c837c2ddab9a08d92785db70678ff3df88fe04180625fedacc1cfa3657c50f9c267bf0d
SSDEEP 98304:LYpGqWClfIiffUPBOTc+0y0HLEC5ejF29wifXK:2ff4kTcw
MD5 SHA1 SHA512 SSDEEP

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odFolders.exe

Path C:\Program Files (x86)\PrintFolders\odFolders.exe
Size 3.6MB
SHA256 f259ff641813a326bb76c2663d474b23e42f8ec37834c522dd9c1b95980466cc
MD5 dab62389d9a15d7e76f20a424a722fff
SHA1 4c30df27062ca9343bf55e58b9e7aefbfd9ff7be
SHA512 e8f45810056f03bc51e4bd2857afe2e8d09290e3b120d781ff76f65c4c837c2ddab9a08d92785db70678ff3df88fe04180625fedacc1cfa3657c50f9c267bf0d
SSDEEP 98304:LYpGqWClfIiffUPBOTc+0y0HLEC5ejF29wifXK:2ff4kTcw
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-K42DH.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-2AFQJ.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-U1HFU.tmp\is-2AFQJ.tmp
Size 751KB
SHA256 d3316d42181fe77bad85e822e98fa046cbe05e18b6a6ba8eff8f8aaecc4e7b69
MD5 8322e8815d733696cc7c78d6a290d792
SHA1 9078fe6640ac394256fae9082ba944b696cecaa9
SHA512 da9b88300b99bed9684fa70e6181d50fa1a12c8e3b711c0524cc512c30b492e64ada750017c60d0f291a0b4b2fde7848c4b6cb8ad5b9209f07ab22762950a03c
SSDEEP 12288:9h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvXJQTcYoJRxOm:j5NoqWolrP837JzHvA6yknyWFxvXJQTg
MD5 SHA1 SHA512 SSDEEP

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is-2AFQJ.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-U1HFU.tmp\is-2AFQJ.tmp
Size 751KB
SHA256 d3316d42181fe77bad85e822e98fa046cbe05e18b6a6ba8eff8f8aaecc4e7b69
MD5 8322e8815d733696cc7c78d6a290d792
SHA1 9078fe6640ac394256fae9082ba944b696cecaa9
SHA512 da9b88300b99bed9684fa70e6181d50fa1a12c8e3b711c0524cc512c30b492e64ada750017c60d0f291a0b4b2fde7848c4b6cb8ad5b9209f07ab22762950a03c
SSDEEP 12288:9h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvXJQTcYoJRxOm:j5NoqWolrP837JzHvA6yknyWFxvXJQTg
MD5 SHA1 SHA512 SSDEEP

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6DeIXxGSEG2RVC.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\6DeIXxGSEG2RVC.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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6DeIXxGSEG2RVC.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\6DeIXxGSEG2RVC.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/2416-151-0x0000000000400000-0x000000000042E000-memory.dmp

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memory/2416-132-0x0000000000400000-0x000000000042E000-memory.dmp

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memory/2416-134-0x0000000000400000-0x000000000042E000-memory.dmp

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memory/2416-156-0x0000000000400000-0x000000000042E000-memory.dmp

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memory/3356-142-0x0000000000400000-0x00000000015A2000-memory.dmp

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memory/3356-143-0x0000000000400000-0x00000000015A2000-memory.dmp

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memory/3356-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3356-152-0x0000000000400000-0x00000000015A2000-memory.dmp

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memory/3356-155-0x0000000000400000-0x00000000015A2000-memory.dmp

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