nymaim | d31ab8afd3092f74dbdcba1660c13e35692b73bd1c8024e6409ed189fcf21278

Analysis

max time kernel
91s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
11/11/2022, 09:32

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General

Target
file.exe
Size 2.9MB
Sample221111-lhl5labbh2
SHA256 d31ab8afd3092f74dbdcba1660c13e35692b73bd1c8024e6409ed189fcf21278
MD5 a3b148b8a5388deafd1c80f26bd69e09
SHA1 8ccd6f71639c97705ae356941ff65d067f3d28a1
SHA512 c2dab33d319557db39f041fdc12debc785104d3d6b757fd990f5bff01517abd5452573ab26431aa07961eba63d3d9cc9cc24bcd0dc7ac3d433da77c5fb53f8b3
SSDEEP 49152:Z2VATB2BDtEfxkW+7mLOtJzou8XCKwBWn69EQ/5M77k0JASPVTTd3z/pQ+lQEvde:MVATgMy6qPp8iWUEIKPRxhvpDq
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
4676	is-DT7FC.tmp
3468	gdsearcher76.exe
5060	p03TO8Gti.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	gdsearcher76.exe

Loads dropped DLL 1 IoCs

pid	Process
4676	is-DT7FC.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 12 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\gdSearcher\is-EQEQQ.tmp	is-DT7FC.tmp
File created	C:\Program Files (x86)\gdSearcher\is-30950.tmp	is-DT7FC.tmp
File created	C:\Program Files (x86)\gdSearcher\is-4M408.tmp	is-DT7FC.tmp
File opened for modification	C:\Program Files (x86)\gdSearcher\unins000.dat	is-DT7FC.tmp
File created	C:\Program Files (x86)\gdSearcher\is-8P7EK.tmp	is-DT7FC.tmp
File created	C:\Program Files (x86)\gdSearcher\is-LO9RM.tmp	is-DT7FC.tmp
File created	C:\Program Files (x86)\gdSearcher\is-B9I0M.tmp	is-DT7FC.tmp
File created	C:\Program Files (x86)\gdSearcher\is-DSTHC.tmp	is-DT7FC.tmp
File created	C:\Program Files (x86)\gdSearcher\is-B658G.tmp	is-DT7FC.tmp
File opened for modification	C:\Program Files (x86)\gdSearcher\gdsearcher76.exe	is-DT7FC.tmp
File created	C:\Program Files (x86)\gdSearcher\unins000.dat	is-DT7FC.tmp
File created	C:\Program Files (x86)\gdSearcher\is-7S003.tmp	is-DT7FC.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
4916	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3468	gdsearcher76.exe
3468	gdsearcher76.exe
3468	gdsearcher76.exe
3468	gdsearcher76.exe
3468	gdsearcher76.exe
3468	gdsearcher76.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4916	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2540 wrote to memory of 4676	2540	file.exe	79
PID 2540 wrote to memory of 4676	2540	file.exe	79
PID 2540 wrote to memory of 4676	2540	file.exe	79
PID 4676 wrote to memory of 3468	4676	is-DT7FC.tmp	80
PID 4676 wrote to memory of 3468	4676	is-DT7FC.tmp	80
PID 4676 wrote to memory of 3468	4676	is-DT7FC.tmp	80
PID 3468 wrote to memory of 5060	3468	gdsearcher76.exe	81
PID 3468 wrote to memory of 5060	3468	gdsearcher76.exe	81
PID 3468 wrote to memory of 5060	3468	gdsearcher76.exe	81
PID 3468 wrote to memory of 2968	3468	gdsearcher76.exe	89
PID 3468 wrote to memory of 2968	3468	gdsearcher76.exe	89
PID 3468 wrote to memory of 2968	3468	gdsearcher76.exe	89
PID 2968 wrote to memory of 4916	2968	cmd.exe	91
PID 2968 wrote to memory of 4916	2968	cmd.exe	91
PID 2968 wrote to memory of 4916	2968	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2540
- C:\Users\Admin\AppData\Local\Temp\is-LKM60.tmp\is-DT7FC.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-LKM60.tmp\is-DT7FC.tmp" /SL4 $90068 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2769688 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4676
- - C:\Program Files (x86)\gdSearcher\gdsearcher76.exe
    "C:\Program Files (x86)\gdSearcher\gdsearcher76.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:3468
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\p03TO8Gti.exe
      4⤵
      Executes dropped EXE
      PID:5060
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "gdsearcher76.exe" /f & erase "C:\Program Files (x86)\gdSearcher\gdsearcher76.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2968
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "gdsearcher76.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4916

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

gdsearcher76.exe

Path C:\Program Files (x86)\gdSearcher\gdsearcher76.exe
Size 4.3MB
SHA256 a54bed3dc2b3b1df95440ce08db4df51f161eb2165e00d8d26595b7fff254245
MD5 3503834145484a5ff3842cb7684a43e1
SHA1 6c943871b359fd30600bdaf27d09b9d98a965d10
SHA512 491ef7eddef01211fabe7fa796432d570607c5cd914b2a936f9a3b9bc33f1f52a3783c72d622716775acc9b906bbd28125da41c5afc76b4e0784cb87dc9d3c4e
SSDEEP 98304:iEmV2kbuOmBUMMS5dhQDYIPggUlW2Eg05Kv1eBCgTf:1OsRn4wF7D7gTf
MD5 SHA1 SHA512 SSDEEP

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gdsearcher76.exe

Path C:\Program Files (x86)\gdSearcher\gdsearcher76.exe
Size 4.3MB
SHA256 a54bed3dc2b3b1df95440ce08db4df51f161eb2165e00d8d26595b7fff254245
MD5 3503834145484a5ff3842cb7684a43e1
SHA1 6c943871b359fd30600bdaf27d09b9d98a965d10
SHA512 491ef7eddef01211fabe7fa796432d570607c5cd914b2a936f9a3b9bc33f1f52a3783c72d622716775acc9b906bbd28125da41c5afc76b4e0784cb87dc9d3c4e
SSDEEP 98304:iEmV2kbuOmBUMMS5dhQDYIPggUlW2Eg05Kv1eBCgTf:1OsRn4wF7D7gTf
MD5 SHA1 SHA512 SSDEEP

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is-DT7FC.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-LKM60.tmp\is-DT7FC.tmp
Size 657KB
SHA256 e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f
MD5 7cd12c54a9751ca6eee6ab0c85fb68f5
SHA1 76562e9b7888b6d20d67addb5a90b68b54a51987
SHA512 27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc
SSDEEP 12288:CkxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphIxz:ZFRCUn4rP/37YzHXA6QJsoPtIpqxz
MD5 SHA1 SHA512 SSDEEP

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is-DT7FC.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-LKM60.tmp\is-DT7FC.tmp
Size 657KB
SHA256 e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f
MD5 7cd12c54a9751ca6eee6ab0c85fb68f5
SHA1 76562e9b7888b6d20d67addb5a90b68b54a51987
SHA512 27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc
SSDEEP 12288:CkxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphIxz:ZFRCUn4rP/37YzHXA6QJsoPtIpqxz
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

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

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p03TO8Gti.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\p03TO8Gti.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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p03TO8Gti.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\p03TO8Gti.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/2540-156-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/2540-138-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/2540-132-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/3468-143-0x0000000000400000-0x0000000001657000-memory.dmp

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memory/3468-144-0x0000000000400000-0x0000000001657000-memory.dmp

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memory/3468-142-0x0000000000400000-0x0000000001657000-memory.dmp

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memory/3468-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3468-152-0x0000000000400000-0x0000000001657000-memory.dmp

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memory/3468-155-0x0000000000400000-0x0000000001657000-memory.dmp

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